CN102169237A - Stereographic projection optical system - Google Patents
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- 230000003287 optical effect Effects 0.000 title claims abstract description 69
- 230000010287 polarization Effects 0.000 claims abstract description 51
- 238000003384 imaging method Methods 0.000 claims abstract description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 41
- 239000004973 liquid crystal related substance Substances 0.000 claims description 41
- 229910052710 silicon Inorganic materials 0.000 claims description 41
- 239000010703 silicon Substances 0.000 claims description 41
- 238000000926 separation method Methods 0.000 claims description 12
- 238000002310 reflectometry Methods 0.000 claims description 2
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- 210000000887 face Anatomy 0.000 description 2
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- 210000001525 retina Anatomy 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004581 coalescence Methods 0.000 description 1
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Abstract
A stereographic projection optical system comprises a light-emitting device, which emits light; polarized light-splitting device, which receives the light emitted from the lighting-emitting device and converts the light to two beams of polarized light for emitting, with polarization directions of the two beams being perpendicular to each other; and a projection device which receives the polarized light emitted from the polarized light-splitting device and realizes imaging of the polarized light. The stereographic project optical system is simple in structure and convenient for installation.
Description
Technical field
The present invention relates to the three-dimensional imaging field, relate in particular to a kind of stereo projection optical system.
Background technology
Imaging technique constantly develops, and pixel is more and more higher, and we can see more clear bright, coloury video and figure on bigger screen, but they have a restriction all the time, and promptly they are two-dimentional.The real world that our eyes are seen is simple plane image just, but the stereoscopic three-dimensional with depth of field, and the ability of this perception three-dimensional is a slave function of retina inconsistent (or about being called the slight shift of an object space) soon.Therefore if design a stereo projection apparatus, this parallax that it must simulating human retina image-forming when watching object.This sensation hints us, and what see is exactly real (or almost being real), rather than the two dimension on plane.
Stereoprojection realizes that by the polarisation of light principle stereo projection optical system produces two kinds of mutually perpendicular polarized lights in polarization direction and projects on the screen.And polarized light projects that direction of polarized light must not change when reflexing to viewer's location again on the projection screen, and spectators can only see corresponding polarized light image by every eyes of polaroid glasses, thereby produce stereo perception in the optic nerve device.
The stereoprojection of main flow is to adopt two synchronous projected images of projector in the prior art, and the polarization direction of the polaroid before two projectors is orthogonal, makes the polarization direction of the two bundle polarized lights that produce orthogonal.The stereoeffect that this technology obtains is better, but when playing, need two projectors, therefore there is following shortcoming: 1, must take a series of measure when mounted, therefore complexity is installed, only be adapted at the fixedly use of some large-scale occasions with two projector's relative fixed.2, occupation space is bigger.3, price height.4, need debug two projectors, therefore be not easy debugging.
Shortcoming at above prior art, on October 5th, 2005, disclosed application number was that " 200510025141.x " (publication number: Chinese patent CN1677222A) discloses " a kind of mono-chip single-colour wheel stereo projection optical engine ", only need to adopt a projector just can realize stereoprojection, but the parts that use in this stereo projection optical engine are more, complex structure.
Summary of the invention
The problem that the present invention solves is that the parts of stereo projection optical system use of the prior art are more, complex structure.
For addressing the above problem, the invention provides a kind of stereo projection optical system, comprising:
Light-emitting device is used to emit beam;
Polarized light splitting device is used to receive the light that described light-emitting device sends, and converts thereof into the two bundle mutually perpendicular polarized light outgoing in polarization direction;
Projection arrangement is used to receive the polarized light of described polarized light splitting device outgoing and with the polarized light imaging that receives.
Optionally, described polarized light splitting device comprises first, second, polarization light-dividing surface, the 3rd, fourth face, and the angle between described first, second and the polarization light-dividing surface is a Brewster angle;
After described polarization light-dividing surface refraction, transmit described polarized light splitting device from described the 3rd face from the light of described first vertical incidence, after described polarization light-dividing surface reflection, transmit described polarized light splitting device from described fourth face for S light for P light;
After described polarization light-dividing surface refraction, transmit described polarized light splitting device from described fourth face from the light of described second vertical incidence, after described polarization light-dividing surface reflection, transmit described polarized light splitting device from described the 3rd face for S light for P light.
Optionally, described light-emitting device comprises: first group of light source, second group of light source, first convergent lens, second convergent lens;
The described first group of light source and first convergent lens are positioned at first one side, and first convergent lens is between first group of light source and first; The second group of light source and second convergent lens are positioned at second one side, and second convergent lens is between second group of light source and second;
Described projection arrangement is positioned at described the 3rd side, receives the polarized light from the 3rd outgoing.
Optionally, described projection arrangement comprises: catoptron, prism group, digital micro-mirror chip and projection objective group;
Described catoptron is positioned at described the 3rd side, is used for reflecting the polarized light from described polarized light splitting device outgoing; Described prism group is positioned on the light path of polarized light of described mirror reflects, be used for receiving the polarized light of described mirror reflects and make it inject described digital micro-mirror chip, described projection objective group is used for receiving from the polarized light of digital micro-mirror chip outgoing and with it and is converged to picture.
Optionally, described projection arrangement comprises: catoptron, prism group, three digital micro-mirror chips, looks separate synthetic prisms, projection objective group; Described look separates synthetic prisms and has three color separation faces, and described three digital micro-mirror chips lay respectively at three color separation face one sides; Described look separates synthetic prisms and is used to make the white light color separation of injecting in it, and the monochromatic light that will inject in it closes look;
Described catoptron is positioned at described the 3rd side, is used for reflecting the polarized light from described polarized light splitting device outgoing;
Described prism group is positioned on the light path of polarized light of described mirror reflects, and separate between synthetic prisms and the described projection objective group at described look, be used to receive the polarized light of described mirror reflects and receive the polarized light that separates the synthetic prisms outgoing from described look;
Described look separates synthetic prisms and receives behind the polarized light and color separation of the outgoing of described prism group, the polarized light of monochrome is injected corresponding digital micro-mirror chip, and receive after the monochromatic polarized light of described three digital micro-mirror chips reflection closes look to it and make it inject the prism group;
Described projection objective group is used to receive from the polarized light of described prism group outgoing and with it and is converged to picture.
Optionally, each group light source is a white light source, is provided with colour wheel between described polarized light splitting device and described catoptron, and described colour wheel is eccentric to be provided with;
Perhaps, every group of light source includes R light source, G light source and B light source.
Optionally, described colour wheel is three segment color wheels or six-segment color wheel.
Optionally, each group light source is a white light source.
Optionally, described light-emitting device comprises: first white light source, second white light source, first convergent lens, second convergent lens, light-splitting device;
Described first white light source, first convergent lens is positioned at a side of described light-splitting device, described second white light source, second convergent lens is positioned at the opposite side of described light-splitting device, described first convergent lens is between described first white light source and described light-splitting device, described second convergent lens between described second white light source and described light-splitting device, the light of the light that described first white light source sends after the refraction of the light splitting surface of described light-splitting device, the light that described second white light source sends through the light splitting surface light reflected of described light-splitting device through the same side of described light-splitting device outgoing;
The light of described light-splitting device outgoing is incident to first of described polarized light splitting device;
Described projection arrangement comprises: the 3rd convergent lens, the 4th convergent lens, the first liquid crystal on silicon chip, the second liquid crystal on silicon chip, projection objective group;
The described first liquid crystal on silicon chip, the 3rd convergent lens are positioned at the 3rd side of described polarized light splitting device, and described the 3rd convergent lens is between described polarized light splitting device and the described first liquid crystal on silicon chip;
The described second liquid crystal on silicon chip, the 4th convergent lens are positioned at fourth face one side of described polarized light splitting device, and described the 4th convergent lens is between described polarized light splitting device and the described second liquid crystal on silicon chip;
Described projection objective group is positioned at second one side of described polarized light splitting device.
Optionally, described light-emitting device comprises: the white light source and first convergent lens, described first convergent lens are used to assemble the light that described white light source sends makes it meet the incident angle requirement;
Described first convergent lens and is positioned at first one side of described polarized light splitting device between described polarized light splitting device and described white light source;
Described projection arrangement comprises: second convergent lens, the 3rd convergent lens, the first liquid crystal on silicon chip, the second liquid crystal on silicon chip, projection objective group;
The described first liquid crystal on silicon chip, second convergent lens are positioned at the 3rd side of described polarized light splitting device, and described the 3rd convergent lens is between described light-splitting device and the described first liquid crystal on silicon chip;
The described second liquid crystal on silicon chip, the 3rd convergent lens are positioned at fourth face one side of described polarized light splitting device, and described the 4th convergent lens is between described light-splitting device and the described second liquid crystal on silicon chip;
Described projection objective group is positioned at second one side of described polarized light splitting device.
Optionally, also comprise: projection screen is positioned at that described projection objective group is assembled the polarized light that receives and the position of imaging is used for display image.
Optionally, described polarized light splitting device comprises:
First Amici prism and second Amici prism, described first is the one side of first Amici prism, described second is the one side of second Amici prism, the binding face of first Amici prism and second Amici prism is a polarization light-dividing surface, and has rete on the described binding face, making the transmitance with the P polarized light of the light of brewster angle incidence on polarization light-dividing surface is 100%, and the reflectivity of S polarized light is 100%.
Optionally, described first Amici prism and second Amici prism are triangular prism.
Compared with prior art, technique scheme has the following advantages:
Stereo projection optical system of the present invention utilizes polarized light splitting device can play two effects of beam split and polarization, can reduce the parts of stereo projection optical system, makes its structure simple relatively, and can reduce price, installs also relatively easy.
Description of drawings
Fig. 1 is the structural representation of the polarized light splitting device of the specific embodiment of the invention;
Fig. 2 is the structural representation of the stereo projection optical system of the present invention's first specific embodiment;
Fig. 3 is the structural representation of the stereo projection optical system of the present invention's second specific embodiment;
Fig. 4 is the structural representation of the stereo projection optical system of the present invention's the 3rd specific embodiment;
Fig. 5 is the structural representation of the stereo projection optical system of the present invention's the 4th specific embodiment.
Embodiment
In conjunction with reference to figure 2, Fig. 3, Fig. 4, Fig. 5, the stereo projection optical system of the specific embodiment of the invention comprises: light-emitting device 10 is used to emit beam; Polarized light splitting device 20 is used to receive the light that described light-emitting device 10 sends, and converts thereof into the two bundle mutually perpendicular polarized light outgoing in polarization direction; Projection arrangement 30 is used to receive the polarized light of described polarized light splitting device outgoing and with the polarized light imaging that receives.
In the specific embodiment of the invention, stereo projection optical system also comprises: projection screen 40 is positioned at that described projection arrangement 30 is assembled the polarized light that receives and the position of imaging is used for display image.
Fig. 1 is the structural representation of the polarized light splitting device of the specific embodiment of the invention, with reference to figure 1, in the specific embodiment of the invention, described polarized light splitting device 20 comprises first 21, second 22, polarization light-dividing surface 25, the 3rd 23, fourth face 24, and angle a, b between described first 21, second 22 and the polarization light-dividing surface 25 are Brewster angle.From the light 201 of described first 21 vertical incidence through described polarization light-dividing surface 25 refraction backs for P light 202 transmits described polarized light splitting device 20 from described the 3rd 23, after described polarization light-dividing surface 25 reflects, transmit described polarized light splitting device 20 from described fourth face 24 for S light 203.After described polarization light-dividing surface 25 refractions, transmit described polarized light splitting device 20 from described fourth face 24 from the light of described second 22 vertical incidence, after described polarization light-dividing surface 25 reflections, transmit described polarized light splitting device 20 from described the 3rd 23 for S light for P light.As shown in Figure 1, do not illustrate refraction, the reflection case of light on polarization light-dividing surface 25 from second 22 incident, its refraction, reflection can be known by inference according to the refraction from the polarization of light light splitting surface 25 of first incident, reflection.
In the specific embodiment of the invention, described polarized light splitting device 20 is a polarization splitting prism.Described polarization splitting prism comprises: first Amici prism 26 and second Amici prism 27, described first 21 is the one side of first Amici prism 26, described second 22 is the one side of second Amici prism 27, the binding face of first Amici prism 26 and second Amici prism 27 is a polarization light-dividing surface 25, and has the rete (not shown) on the described binding face, making the transmitance with the P light of the light of brewster angle incidence on polarization light-dividing surface 25 is 100%, and S reflection of light rate is 100%.And in the specific embodiment of the invention, first Amici prism 26 and second Amici prism 27 are triangular prism.
Need to prove that among other embodiment of the present invention, the structure of polarized light splitting device 20 is not limited to structure shown in Figure 1, can also be for well known to a person skilled in the art other structures, as long as can satisfy the purposes of polarized light splitting device 20 among the present invention.
Stereo projection optical system of the present invention can be DLP (digital light processing) stereo projection optical system, also can be LCOS (liquid crystal on silicon) stereo projection optical system.Describe stereo projection optical system of the present invention in detail below in conjunction with accompanying drawing and specific embodiment.
Fig. 2 is the structural representation of the stereo projection optical system of the present invention's first specific embodiment, the stereo projection optical system of first specific embodiment is the DLP stereo projection optical system, with reference to figure 2, in first specific embodiment, described light-emitting device 10 comprises: first group of light source 11a, second group of light source 12a, first convergent lens 13a, the second convergent lens 14a.The described first group of light source 11a and the first convergent lens 13a are positioned at first 21 1 side of polarized light splitting device 20, the first convergent lens 13a is used to assemble light that described first group of light source 11a send and makes it vertically inject first 21 of polarized light splitting device 20 between first group of light source 11a and polarized light splitting device 20 first 21; The second group of light source 12a and the second convergent lens 14a are positioned at second 22 1 side, the second convergent lens 14a is used to assemble light that described second group of light source 12a send and makes it vertically inject second 22 of polarized light splitting device 20 between second group of light source 12a and polarized light splitting device 20 second 22; Described projection arrangement 30 is positioned at the 3rd 23 1 sides of described polarized light splitting device 20, receives from the polarized light of the 3rd 23 outgoing of polarized light splitting device 20.
In specific embodiment shown in Figure 2, each group light source is a white light source, therefore is provided with colour wheel 60 between described polarized light splitting device 20 and described catoptron 31a.In the specific embodiment of the invention, colour wheel 60 is R, G, B three segment color wheels or R, G, B six-segment color wheel.Wherein, two white light source 11a, 12a alternately light, colour wheel 60 rotations, and arbitrary moment stereo projection optical system is exported a kind of monochromatic light of polarization state.If colour wheel 60 is a six-segment color wheel, then need reasonably to control the rotation of six-segment color wheel, the time of its rotation is different with the rotational time of three segment color wheels, and the assurance synchronization is only exported a kind of monochromatic light of polarization state.If be three segment color wheels, colour wheel turns around, and two white light source 11a, 12a alternately light once.If be six-segment color wheel, can turn around for colour wheel, two white light source 11a, 12a alternately light once; Also can alternately light once for colour wheel changes half-turn white light source 11a, 12a.And, in the specific embodiment of the invention, colour wheel 60 is eccentric placements, that is to say that the central axis of colour wheel 60 does not overlap with the central axis of the optical devices of stereo projection optical system, guarantees only to pass through a look section from the light of polarized light splitting device 20 outgoing at synchronization.
In this first specific embodiment, the stereoprojection light system also comprises light balancing device 50, between described polarized light splitting device 20 and described projection arrangement 30, specifically, light balancing device 50 is between catoptron 31a and colour wheel 60, with the equalizing light rays of colour wheel 60 outgoing.Light balancing device 60 is optical tunnel or even light microscopic.
The principle of work of the stereo projection optical system of the present invention's first specific embodiment shown in Figure 2 is: white light source 11a, 12a alternately light, and the light that sends separately incides polarized light splitting device 20 through convergent lens 13a, 14a; Because two whites, 11,12 light sources are alternately lighted, be synchronization owing to have only a light source igniting, therefore the light that the 3rd 23 synchronizations of polarized light splitting device 20 can only a kind of polarization state of outgoing, the light that two light sources send is behind polarization splitting prism, the polarization state of light difference that produces, two kinds of polarization states are vertical mutually; The transmittance that white light source 11a sends goes out polarized light splitting device 20, produces P light, and the light that white light source 12a sends from polarized light splitting device 20 outputs, produces S light through reflection; (colour wheel 60 is in rotation status to polarized light through colour wheel 60, synchronization is only exported a kind of monochromatic light, be R, G, B look one of them), light balancing device 50, catoptron 31a, prism group 32a incide digital micro-mirror chip 33a, digital micro-mirror chip 33a with three kinds of reflection of monochromatic lights of different polarization states to projection objective group 34a; The polarized light imaging that projection objective group 34a convergence receives projects to projection screen 40 and obtains stereo-picture at last.
In first specific embodiment, stereo projection optical system can also comprise that IR-UV (infrared-ultraviolet) is by the device (not shown), before being located at convergent lens 13a, 14a respectively, just be arranged between two white light sources and the corresponding convergent lens, this IR-UV (infrared-ultraviolet) is infrared light and the ultraviolet light of removing in the white light source by the effect of device.
The stereo projection optical system of this first embodiment utilizes polarized light splitting device can convert the two-beam line to two kinds of mutually perpendicular polarized lights in polarization direction by coalescence.Need not the stereo projection optical system in existing patent, need two polaroids; And, two of outgoing polarized light directions of propagation are all on a light path from polarized light splitting device, just do not need the stereo projection optical system in the existing patent such yet, need parallel two-beam line is changed its light path by three prisms respectively, the light path conversion that makes parallel two-beam line is on same light path.Therefore, the technical program has been saved a polaroid, and has saved three prisms, can reduce the parts of stereo projection optical system like this, makes its structure simple relatively, and can reduce price, installs also relatively easy.And can realize stereoprojection with single colour wheel, and optical system structure is simple, and cost is low, is easy to realize.
In specific embodiment shown in Figure 2, can be that first group of light source 11a, second group of light source 11b include R light source, G light source and B light source also for every group of light source.In each group light source R light source, G light source and B light source its put in order without limits, but need to guarantee can not hinder mutually between each monochromatic source the propagation of light.And, not needing colour wheel in this specific embodiment, alternately luminous by reasonable control R light source, G light source and B light source guarantees that synchronization has only a kind of monochromatic polarized light to penetrate polarized light splitting device 20.
Fig. 3 is the structural representation of the stereo projection optical system of the present invention's second specific embodiment, the stereo projection optical system of second specific embodiment is the DLP stereo projection optical system, with reference to figure 3, in second specific embodiment, light-emitting device 10 is identical with the light-emitting device 10 of first specific embodiment, and light-emitting device 10 is also identical with first specific embodiment with the position relation of polarized light splitting device 20, does not do at this and gives unnecessary details.
In second specific embodiment, projection arrangement 30 comprises: catoptron 31b, prism group 32b, three digital micro-mirror chip 33b, looks separate synthetic prisms 35b, projection objective group 34b.Described look separates synthetic prisms 35b and has three color separation faces, and described three digital micro-mirror chip 33b lay respectively at three color separation face one sides; Described look separates synthetic prisms 35b and is used to make the white light color separation of injecting in it, and will inject monochromatic light in it and be focused at and close look on the light path.In this second specific embodiment, each group light source is white light source, and it is that R, G, B three look looks separate synthetic prisms that look separates synthetic prisms 35b.Send to corresponding digital micro-mirror chip 33b because look separates respectively after synthetic prisms 35b can be divided into the white light that receives R, G, B three looks, therefore in this second specific embodiment, do not need colour wheel.
Catoptron 31b is positioned at the 3rd 23 1 sides of described polarized light splitting device 20, is used for reflecting the polarized light from described polarized light splitting device 20 outgoing; Prism group 32b is positioned on the light path of polarized light of described catoptron 31b reflection, and separate between synthetic prisms 35b and the described projection objective group 34b at described look, be used to receive the polarized light of described catoptron 31b reflection and receive the polarized light that separates synthetic prisms 35b outgoing from described look.Described look separates synthetic prisms 35b and receives from the polarized light of described prism group 32b outgoing and after making its color separation, the polarized light of monochrome is injected corresponding digital micro-mirror chip 33b, and receive after the monochromatic polarized light of described three digital micro-mirror chip 33b reflection closes look to it and make it inject prism group 32b.Described projection objective group 34b is used to receive the polarized light of described prism group 32b outgoing and it is converged to picture.Be specially: the white polarized light of outgoing is incident on the catoptron 31b from polarized light splitting device 20, catoptron 31b injects prism group 32b after white polarized light is reflected, be incident to look prism group 32b reflects white polarized light through a series of refractions after and separate synthetic prisms 35b, look separates synthetic prisms 35b white polarized light is divided into R, G, behind B three looks, R, G, the monochromatic polarized light of B is incident to three digital micro-mirror chip 33b respectively, three R that digital micro-mirror chip 33b reflection receives, G, the monochromatic polarized light of B, R through three digital micro-mirror chip 33b reflections, G, the monochromatic polarized light of B separates synthetic prisms 35b through look and closes look after prism group 32b is incident to projection objective group 34b, by the convergence of rays imaging of projection objective group 34b to receiving.
In this second specific embodiment, the stereoprojection light system also comprises light balancing device 50b, between described polarized light splitting device 20 and described optical projection system 30, specifically, light balancing device 50b is between catoptron 31b and polarized light splitting device 20, with the equalizing light rays of polarized light splitting device 20 outgoing.Light balancing device 50b is optical tunnel or even light microscopic.
In second specific embodiment, also comprise projection screen 40, be positioned at that described projection objective group 30 is assembled the polarized light that receives and the position of imaging is used for display image.
The principle of work of the stereo projection optical system of second specific embodiment is: white light source 11b, 12b alternately light, and the light that sends separately incides polarized light splitting device 20 through convergent lens 13b, 14b; Because two white light source 11b, 12b alternately light, be synchronization owing to have only a light source igniting, therefore the white light that the 3rd 23 synchronizations of polarized light splitting device 20 can only a kind of polarization state of outgoing, the light that two light sources send is behind polarized light splitting device 20, the polarization state of light difference that produces, two kinds of polarization states are vertical mutually; The transmittance that white light source 11a sends goes out polarized light splitting device 20, produces P light, and the light that white light source 12a sends from polarized light splitting device 20 outputs, produces S light through reflection.The white polarized light of outgoing is incident on the catoptron 31b from polarized light splitting device 20, catoptron 31b injects prism group 32b after white polarized light is reflected, be incident to look prism group 32b reflects white polarized light through a series of refractions after and separate synthetic prisms 35b, look separates synthetic prisms 35b white polarized light is divided into R, G, behind B three looks, R, G, the monochromatic polarized light of B is incident to three digital micro-mirror chip 33b respectively, three R that digital micro-mirror chip 33b reflection receives, G, the monochromatic polarized light of B, R through three digital micro-mirror chip 33b reflections, G, the monochromatic polarized light of B separates synthetic prisms 35b through look and closes look after prism group 32b is incident to projection objective group 34b, by projection objective group 34b the white polarized light that receives is converged to picture.Because white light source 11b, 12b alternately light, so synchronization has only a kind of imaging of white polarized light, after two kinds of polarized light imagings, the visual effect of giving the people be solid to.
Fig. 4 is the structural representation of the stereo projection optical system of the present invention's the 3rd specific embodiment, the stereo projection optical system of the 3rd specific embodiment is the LCOS stereo projection optical system, with reference to figure 4, in the 3rd specific embodiment, described light-emitting device 10 comprises: the first white light source 11c, the second white light source 12c, the first convergent lens 13c, the second convergent lens 14c, light-splitting device 15c.The described first white light source 11c, the first convergent lens 13c are positioned at the side of described light-splitting device 15c.The described second white light source 12c, the second convergent lens 14c is positioned at the opposite side of described light-splitting device 15c, the described first convergent lens 13c is between described first white light source 11c and described light-splitting device 15c, the described second convergent lens 14c between described second white light source 12c and described light-splitting device 15c, the light of the light that the described first white light source 11c sends after the refraction of the light splitting surface of described light-splitting device 15c, the light that the described second white light source 12c sends through the light splitting surface light reflected of described light-splitting device 15c through the outgoing of the same side of described light-splitting device 15c; The light vertical incidence of described light-splitting device 15c outgoing is to first 21 of described polarized light splitting device 20.
Described projection arrangement 30 comprises: the 3rd convergent lens 31c, the 4th convergent lens 32c, the first liquid crystal on silicon chip 33c, the second liquid crystal on silicon chip 34c, projection objective group 35c.The described first liquid crystal on silicon chip 33c, the 3rd convergent lens 31c are positioned at the 3rd 23 1 sides of described polarized light splitting device, and described the 3rd convergent lens 31c will be converged to the light that meets the incident angle requirement from the polarized light of polarized light splitting device 20 outgoing and send to the first liquid crystal on silicon chip 33c between described polarized light splitting device 20 and the described first liquid crystal on silicon chip 33c.The described second liquid crystal on silicon chip 34c, the 4th convergent lens 32c are positioned at fourth face 24 1 sides of described polarized light splitting device 20, and described the 4th convergent lens 32c will be converged to the light that meets the incident angle requirement from the polarized light of polarized light splitting device 20 outgoing and send to the second liquid crystal on silicon chip 34c between described polarized light splitting device 20 and the described second liquid crystal on silicon chip 34c.
Projection objective group 35c is positioned at second 22 1 side of described polarized light splitting device 20, the polarized light that is incident to the described first liquid crystal on silicon chip 33c is incident upon the 3rd 23 of described polarized light splitting device 20 through the 3rd convergent lens 31c after its reflection, and after polarization light-dividing surface 25 reflection of described polarized light splitting device 20 by described second 22 outgoing, be incident to described projection objective group 35c; The polarized light that is incident to the described second liquid crystal on silicon chip 34c is incident upon the fourth face 24 of described polarized light splitting device 20 through the 4th convergent lens 32c after its reflection, and after polarization light-dividing surface 25 refraction of described polarized light splitting device 20 by second 22 outgoing, be incident to described projection objective group 35c.
Projection objective group 35c receives polarized light, and polarized light is converged to picture, in the 3rd specific embodiment, also comprises projection screen 40, is positioned at that described projection objective group 35c assembles the polarized light that receives and the position of imaging is used for display image.In the 3rd specific embodiment, the stereoprojection light system also comprises light balancing device 50c, between described polarized light splitting device 20 and light-emitting device 10, specifically, light balancing device 50c is between light-splitting device 15c and polarized light splitting device 20, with the equalizing light rays of light-splitting device 15c outgoing.Light balancing device 50c is optical tunnel or even light microscopic.
The principle of work of the stereo projection optical system of the 3rd specific embodiment is: white light source 11c, 12c light simultaneously, white light source 11c, 12c also can alternately light, be converged to through convergent lens 13c, 14c and be incident to light-splitting device 15c after meeting the light that incident angle requires, light-splitting device 15c sends the light that is positioned at different light paths with white light source 11c, 12c to be changed on same light path; After light is spared light through light balancing device 50c afterwards, be incident to polarized light splitting device 20.The light that is incident to polarized light splitting device 20 is white natural light, become white S light after the polarization light-dividing surface reflection of this white natural light through polarized light splitting device 20, be incident to the first liquid crystal on silicon chip 33c through the 3rd convergent lens 31c, become white P light after the refraction, be incident to the second liquid crystal on silicon chip 34c through the 4th convergent lens 32c.By controlling the switch of the first liquid crystal on silicon chip 33c, the second liquid crystal on silicon chip 34c, can guarantee to have only a kind of white polarized light to be incident to projection objective group 35c at synchronization, can become stereo-picture like this.
Fig. 5 is the structural representation of the stereo projection optical system of the present invention's the 4th specific embodiment, the stereo projection optical system of the 4th specific embodiment is the LCOS stereo projection optical system, with reference to figure 4, in the 4th specific embodiment, projection arrangement 30 is identical with the 3rd specific embodiment, do not do detailed description at this, can be with reference to description to the 3rd specific embodiment.
In the 4th specific embodiment, described light-emitting device 10 comprises a white light source 11d and the first convergent lens 12d, and the described first convergent lens 12d is used to assemble the light that described white light source 11d sends makes it meet the incident angle requirement; The described first convergent lens 12d is between described polarized light splitting device 20 and described white light source 11d, and be positioned at first 21 1 side of described polarized light splitting device 20, first 21 of injecting polarized light splitting device 20 from the light of the described first convergent lens 12d outgoing.
Need to prove the 3rd convergent lens 31c in corresponding the 3rd specific embodiment of the second convergent lens 31d in the 4th specific embodiment, the 4th convergent lens 32c in corresponding the 3rd specific embodiment of the 3rd convergent lens 32d in the 4th specific embodiment.
In the 4th specific embodiment, stereo projection optical system also comprises light balancing device 50d, between described polarized light splitting device 20 and described light-emitting device 10.Specifically, light balancing device 50d is between the first convergent lens 12d and polarized light splitting device 20, with the equalizing light rays of the first convergent lens 12d outgoing.Light balancing device 50d is optical tunnel or even light microscopic.
The principle of work of the stereo projection optical system of the principle of work of the stereo projection optical system of the 4th specific embodiment and the 3rd specific embodiment is basic identical, just owing to have only a white light source, therefore, need the control first liquid crystal on silicon chip, the second liquid crystal on silicon chip alternately to open, close, can guarantee to have only a kind of white polarized light to be incident to the projection objective group, can become stereo-picture like this at synchronization.
Stereo projection optical system of the present invention utilizes polarized light splitting device can play two effects of beam split and polarization, can reduce the parts of stereo projection optical system, makes its structure simple relatively, and can reduce price, installs also relatively easy.
Though the present invention with preferred embodiment openly as above; but it is not to be used for limiting the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize the method and the technology contents of above-mentioned announcement that technical solution of the present invention is made possible change and modification; therefore; every content that does not break away from technical solution of the present invention; to any simple modification, equivalent variations and modification that above embodiment did, all belong to the protection domain of technical solution of the present invention according to technical spirit of the present invention.
Claims (13)
1. a stereo projection optical system is characterized in that, comprising:
Light-emitting device is used to emit beam;
Polarized light splitting device is used to receive the light that described light-emitting device sends, and converts thereof into the two bundle mutually perpendicular polarized light outgoing in polarization direction;
Projection arrangement is used to receive the polarized light of described polarized light splitting device outgoing and with the polarized light imaging that receives.
2. stereo projection optical system as claimed in claim 1, it is characterized in that, described polarized light splitting device comprises first, second, polarization light-dividing surface, the 3rd, fourth face, and the angle between described first, second and the polarization light-dividing surface is a Brewster angle;
After described polarization light-dividing surface refraction, transmit described polarized light splitting device from described the 3rd face from the light of described first vertical incidence, after described polarization light-dividing surface reflection, transmit described polarized light splitting device from described fourth face for S light for P light;
After described polarization light-dividing surface refraction, transmit described polarized light splitting device from described fourth face from the light of described second vertical incidence, after described polarization light-dividing surface reflection, transmit described polarized light splitting device from described the 3rd face for S light for P light.
3. stereo projection optical system as claimed in claim 2 is characterized in that, described light-emitting device comprises: first group of light source, second group of light source, first convergent lens, second convergent lens;
The described first group of light source and first convergent lens are positioned at first one side, and first convergent lens is between first group of light source and first; The second group of light source and second convergent lens are positioned at second one side, and second convergent lens is between second group of light source and second;
Described projection arrangement is positioned at described the 3rd side, receives the polarized light from the 3rd outgoing.
4. stereo projection optical system as claimed in claim 3 is characterized in that, described projection arrangement comprises: catoptron, prism group, digital micro-mirror chip and projection objective group;
Described catoptron is positioned at described the 3rd side, is used for reflecting the polarized light from described polarized light splitting device outgoing; Described prism group is positioned on the light path of polarized light of described mirror reflects, be used for receiving the polarized light of described mirror reflects and make it inject described digital micro-mirror chip, described projection objective group is used for receiving from the polarized light of digital micro-mirror chip outgoing and with it and is converged to picture.
5. stereo projection optical system as claimed in claim 3 is characterized in that, described projection arrangement comprises: catoptron, prism group, three digital micro-mirror chips, looks separate synthetic prisms, projection objective group; Described look separates synthetic prisms and has three color separation faces, and described three digital micro-mirror chips lay respectively at three color separation face one sides; Described look separates synthetic prisms and is used to make the white light color separation of injecting in it, and the monochromatic light that will inject in it closes look;
Described catoptron is positioned at described the 3rd side, is used for reflecting the polarized light from described polarized light splitting device outgoing;
Described prism group is positioned on the light path of polarized light of described mirror reflects, and separate between synthetic prisms and the described projection objective group at described look, be used to receive the polarized light of described mirror reflects and receive the polarized light that separates the synthetic prisms outgoing from described look;
Described look separates synthetic prisms and receives behind the polarized light and color separation of the outgoing of described prism group, the polarized light of monochrome is injected corresponding digital micro-mirror chip, and receive after the monochromatic polarized light of described three digital micro-mirror chips reflection closes look to it and make it inject the prism group;
Described projection objective group is used to receive from the polarized light of described prism group outgoing and with it and is converged to picture.
6. stereo projection optical system as claimed in claim 4 is characterized in that, each group light source is a white light source, is provided with colour wheel between described polarized light splitting device and described catoptron, and described colour wheel is eccentric to be provided with;
Perhaps, every group of light source includes R light source, G light source and B light source.
7. stereo projection optical system as claimed in claim 6 is characterized in that, described colour wheel is three segment color wheels or six-segment color wheel.
8. stereo projection optical system as claimed in claim 5 is characterized in that, each group light source is a white light source.
9. stereo projection optical system as claimed in claim 2 is characterized in that, described light-emitting device comprises: first white light source, second white light source, first convergent lens, second convergent lens, light-splitting device;
Described first white light source, first convergent lens is positioned at a side of described light-splitting device, described second white light source, second convergent lens is positioned at the opposite side of described light-splitting device, described first convergent lens is between described first white light source and described light-splitting device, described second convergent lens between described second white light source and described light-splitting device, the light of the light that described first white light source sends after the refraction of the light splitting surface of described light-splitting device, the light that described second white light source sends through the light splitting surface light reflected of described light-splitting device through the same side of described light-splitting device outgoing;
The light of described light-splitting device outgoing is incident to first of described polarized light splitting device;
Described projection arrangement comprises: the 3rd convergent lens, the 4th convergent lens, the first liquid crystal on silicon chip, the second liquid crystal on silicon chip, projection objective group;
The described first liquid crystal on silicon chip, the 3rd convergent lens are positioned at the 3rd side of described polarized light splitting device, and described the 3rd convergent lens is between described polarized light splitting device and the described first liquid crystal on silicon chip;
The described second liquid crystal on silicon chip, the 4th convergent lens are positioned at fourth face one side of described polarized light splitting device, and described the 4th convergent lens is between described polarized light splitting device and the described second liquid crystal on silicon chip;
Described projection objective group is positioned at second one side of described polarized light splitting device.
10. stereo projection optical system as claimed in claim 2 is characterized in that, described light-emitting device comprises: the white light source and first convergent lens, described first convergent lens are used to assemble the light that described white light source sends makes it meet the incident angle requirement;
Described first convergent lens and is positioned at first one side of described polarized light splitting device between described polarized light splitting device and described white light source;
Described projection arrangement comprises: second convergent lens, the 3rd convergent lens, the first liquid crystal on silicon chip, the second liquid crystal on silicon chip, projection objective group;
The described first liquid crystal on silicon chip, second convergent lens are positioned at the 3rd side of described polarized light splitting device, and described the 3rd convergent lens is between described light-splitting device and the described first liquid crystal on silicon chip;
The described second liquid crystal on silicon chip, the 3rd convergent lens are positioned at fourth face one side of described polarized light splitting device, and described the 4th convergent lens is between described light-splitting device and the described second liquid crystal on silicon chip;
Described projection objective group is positioned at second one side of described polarized light splitting device.
11. as each described stereo projection optical system of claim 1～10, it is characterized in that, also comprise: projection screen is positioned at that described projection objective group is assembled the polarized light that receives and the position of imaging is used for display image.
12. stereo projection optical system as claimed in claim 2 is characterized in that, described polarized light splitting device comprises:
First Amici prism and second Amici prism, described first is the one side of first Amici prism, described second is the one side of second Amici prism, the binding face of first Amici prism and second Amici prism is a polarization light-dividing surface, and has rete on the described binding face, making the transmitance with the P polarized light of the light of brewster angle incidence on polarization light-dividing surface is 100%, and the reflectivity of S polarized light is 100%.
13. stereo projection optical system as claimed in claim 12 is characterized in that, described first Amici prism and second Amici prism are triangular prism.
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| CN2011101075035A CN102169237A (en) | 2011-04-27 | 2011-04-27 | Stereographic projection optical system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101075035A CN102169237A (en) | 2011-04-27 | 2011-04-27 | Stereographic projection optical system |
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Application publication date: 20110831 |