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WO2011028152A2 - Filtre de polarisation adaptatif - Google Patents

Filtre de polarisation adaptatif Download PDF

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Publication number
WO2011028152A2
WO2011028152A2 PCT/RU2010/000493 RU2010000493W WO2011028152A2 WO 2011028152 A2 WO2011028152 A2 WO 2011028152A2 RU 2010000493 W RU2010000493 W RU 2010000493W WO 2011028152 A2 WO2011028152 A2 WO 2011028152A2
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WO
WIPO (PCT)
Prior art keywords
radiation
optically transparent
filter
molecules
optical radiation
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Ceased
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PCT/RU2010/000493
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English (en)
Russian (ru)
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WO2011028152A3 (fr
Inventor
Владимир Леонтьевич КРАПИВИН
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Individual
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Publication of WO2011028152A3 publication Critical patent/WO2011028152A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/133345—Insulating layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
    • G02F1/13471—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133502—Antiglare, refractive index matching layers
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/133504—Diffusing, scattering, diffracting elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
    • G02F1/294—Variable focal length devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F2203/00—Function characteristic
    • G02F2203/52—Optical limiters

Definitions

  • ACE Adaptive Polarizing Filter
  • the invention relates to devices for protection against glare and can be used in anti-glare systems, based in their work on both polarized and non-polarized radiation for
  • the closest in technical essence and selected as a prototype is the "Adaptive Polarizing Reflex Filter” [5], containing a polarizing reflective filter and at least one radiation receiver.
  • the large axes of the LC molecules are located in a horizontal plane orthogonally to the normally incident radiation and their parameters the refractions for one of the polarizing components of the radiation will vary depending on the angle of incidence of the blinding radiation in the azimuthal plane, which will negatively affect ffektivnosti work reflecting structures and largely is manifest when using the filter in side mirrors of vehicles.
  • LC liquid crystals
  • the claimed technical solution in the annex to vehicles is aimed at creating an effective anti-glare filter with minimal loss and adaptive to glare radiation sources.
  • APRF Adaptive Polarizing Reflex Filter
  • the threshold of the polarization components of optical radiation change their orientation in space, in an adaptive polarization filter (ACE), at least two sequentially installed optically transparent systems that attenuate the intensity of the optical radiation passing through them are made and arranged the same way, and the orientation in each of they agree the large axes of the molecules of the birefringent substance on the LC with the corresponding polarization component of the transmitted optical radiation in such a way that for one and whether both polarization components of the input radiation are met, the scattering and / or reflection conditions are satisfied.
  • ACE adaptive polarization filter
  • the electrodes of the system of optically transparent electrodes (SOPE) on one side of each of the series-installed optically transparent systems are made wide, and the electrodes on the other hand are mounted orthogonally to them, and when control signals are applied to them, they form birefringent materials on the molecules in the films LCD cylindrical lenses whose focal length depends on the control signals that form them.
  • SOPE optically transparent electrodes
  • the polarization plane rotator contains at least one system of optically transparent electrodes.
  • From the output side contains a light absorber. 6. In addition, from the output side contains a reflector of optical radiation.
  • the surfaces of the optically transparent dielectric substance contain electrically controlled matching
  • the refraction of electrically controlled matching, antireflection films has an intermediate value between the refractive indices for the polarization of optical radiation, which coincides with the long axis of the LC molecules of the birefringent material and is orthogonal to it.
  • received optical radiation contains a filter that corrects the spectrum of transmitted optical radiation.
  • the outer surfaces have an antireflection coating.
  • Figure 1 shows a fragment of an ACE filter with two optically transparent systems in series with scattering optical radiation structures using optically
  • cylindrical LC - lenses with variable focal length are formed.
  • FIGs. 3a and 6b show fragments of an ACE that is mounted on the windshield of a vehicle (or combined with it), containing two optically transparent systems of the same type with reflective structures with a controlled reflection coefficient and with a polarization plane rotator between them, and in FIG.
  • An additional liquid crystal layer (18) which has the effect of
  • DLS dynamic light scattering
  • Fig. 3c, e shows fragments of two series-mounted optically transparent systems with reflective structures based on alternating layers of optically transparent dielectric films and films on an LCD, with a polarization plane rotator between them, and their operation in the presence and absence of an external control potential on optically transparent electrodes.
  • Fig. Ze shows a fragment of two serially installed optically transparent ACE filter systems made with
  • Figure 3 ⁇ , n shows an ACE filter fragment with two and four sequentially mounted optically transparent systems using an optically transparent dielectric substance and birefringent material on liquid crystal molecules (LC), with the initial homeotropic orientation of the LC molecules (Fig. 3! ⁇ ) and planar (Fig. 3b) and the orientant plotted in each of them on the surface of an optically transparent dielectric substance in one direction, with a rotator of a plane of polarization between them, in which under the action of control potentials are formed
  • LC liquid crystal molecules
  • cylindrical LCD lenses with a variable focal length and in the Onr.3g filter in each of the systems an additional LCD layer is introduced in which the system of optically transparent electrodes is shifted to
  • Figures 4a, b show a fragment of a vehicle mirror based on an ACE filter with two optically transparent systems in series with reflective structures based on
  • alternating layers of optically transparent dielectric films and films on an LCD with optically transparent electrodes, a polarization plane rotator between them and a light absorber on the output side of the filter and its operation (zones "A" and "B") in the presence and absence of an external control potential on the optically transparent electrodes and the mirror of Fig. 4b contains an additional system of optically transparent electrodes.
  • Fig. 4c shows a fragment of a vehicle mirror based on an ACE filter with two optically transparent systems with scattering structures in series using an optically transparent dielectric substance and
  • cylindrical LCD lenses with a variable focal length and a reflector from the output side of the filter are formed.
  • Figure 4 shows a fragment of a vehicle mirror based on an ACE filter with two optically transparent systems in series using an optically transparent dielectric substance and a birefringent substance on liquid crystal molecules (LC), with an initial homeotropic
  • Fig.5a ... Onr.5f shows fragments of a multilayer reflective structure and the passage of optical radiation through them for different positions of the large axes of the LC molecules
  • Fig.5c ... Fig.5 £ contain additional layers of electrically controlled matching
  • Figs. 5c and Fig. 5e the planar arrangement of LC molecules ( ⁇ ⁇ 2 ⁇ 3 ⁇ ) is used, and in Fig. 5e, ⁇ .5 ⁇ respectively homeotropic, ( ⁇ > ⁇ 2> ⁇ 3 ⁇ ).
  • Figure 6 shows the equivalent operation scheme of the ACE, where A is the plane corresponding to the output plane of the direction fixing sensor, in which the correction is introduced taking into account two receivers, B is reflective ACE filter, C - plane corresponding to the output plane of the receiver position sensor.
  • figa, b shows the location on the combined filter visor of the vehicle filter ACE, the sensor for fixing the position of the radiation receiver (DFPP) and DFIN (7), respectively, a side view and from the driver.
  • the adaptive polarizing filter (ACE) (Fig.7) contains at least two sequentially installed optically transparent systems using optically transparent
  • dielectric substance and birefringent substance on LC molecules the opposite surfaces of which contain systems of optically transparent electrodes (SOPE) (3), the direction of which on one surface differs from the direction of their location on another surface, the surface of optically transparent
  • dielectric substances contain at least one orientant, ACE structures are made and arranged the same way, and also contains a signal processing and control system, including a sensor for recording the intensity and directions of arrival of the polarizing components of optical radiation (DFIN), a decision processor, a receiver position fixation sensor optical radiation (DFPP), and at least one control device, and also additionally contains a polarization plane rotator, wide electrodes and electrodes, Framing cylindrical lenses, an additional system of optically transparent electrodes (DSOPE), a light absorber, an optical radiation reflector, at least one
  • the liquid crystal layer (18) having the effect of controlled light scattering is made in the form of glasses and contains a case of glasses and an external unit, an optically transparent substance with a lower or higher refractive index, having an antireflection coating,
  • electrically controlled matching, antireflection films contains a sensor for assessing the average intensity of external radiation, a spectral composition analyzer, a light filter, and the external surfaces of the ACE have an antireflection coating and also contains an ACE temperature maintenance system.
  • the device operates as follows:
  • the adaptive polarizing filter is mounted in the vehicle in an assembled (folded) form so that, if necessary, it can be introduced in front of the driver’s eyes to protect against external optical radiation of high brightness (Fig. 7) or mounted on the windshield of the vehicle means (or combined with a windshield).
  • the external optical radiation is incident on at least two sequentially installed optically transparent systems containing mutually independent structures that attenuate the intensity of the corresponding
  • Figure 1 shows an ACE filter made using LC films in which cylindrical focusing (scattering) optical radiation is formed in the corresponding filter zones under the action of an external control potential on a system of optically transparent electrodes [6,7].
  • the initial orientation of the large axes of the molecules in the LC films is set parallel to the incoming radiation and can be homeotropic or inclined (in the case of installing a filter on the windshield of a vehicle), and in the case of applying an LC with a planar orientation (Fig. Zp), additional electrodes are introduced (8), potentials (or control signals) at which provide the appropriate orientation of the molecules.
  • the refractive indices of the LC films and the optically transparent dielectric substance for the radiation passing through them will be close, and the filter will freely pass it.
  • electrodes On one side of the LCD film, electrodes can be made
  • Fig. An orientant that determines the direction of inclination of LC molecules when applying control potentials to optically transparent electrodes in both optically transparent systems is deposited on the surface of an optically transparent dielectric substance in mutually orthogonal directions.
  • ⁇ I> Hr.3f, g shows an ACE filter fragment with two optically transparent systems in series using an optically transparent dielectric substance and a birefringent substance on liquid crystal molecules (LC), with the initial homeotropic orientation of the LC molecules sputtering on the surface of the optically transparent dielectric substances, for example, carbon nanotubes and the formation of an orienting surface by treatment with a surface electromagnetic wave (SEW) [8], in each of them in one direction and a polarization plane rotator between them, the matching filter with the corresponding plane of polarization of incoming radiation, which under the action of control
  • SEW surface electromagnetic wave
  • cylindrical LCD lenses with a variable focal length are formed, and an additional LCD layer is introduced in the Onr.3g filter in each of the systems, in which the system of optically transparent electrodes is shifted in a vertical plane.
  • This layer can have significantly lower efficiency, but sufficient to scatter part of the radiation transmitted through the first lens system in places where
  • the layers of carbon nanotubes they can be deposited on the surface of an optically transparent dielectric substance with discontinuities parallel to narrow electrodes, and in the orthogonal plane combined with wide electrodes.
  • reflective structures are uniform and transparent.
  • FIG.Ze shows a fragment of two serially installed optically transparent ACE filter systems with a rotator between them, made using two layers of LCD in each of them,
  • the second polarization component of the optical radiation is scattered in the vertical plane.
  • the ACE (Fig. 3a, b, c, is made on the basis of alternating layers of optically transparent films with a thickness of ⁇ / 4 or an odd multiple of ⁇ / 4 with large and small refractive indices, in which dielectric optically transparent films alternate and oriented in a given direction by the corresponding orientant (for example, rubbing or spraying) F films, for example, nematic LCDs (NLC) with planar or
  • NLC NLC with a planar orientation of molecules with positive anisotropy
  • 5N Ne-No
  • the refractive index No which coincides with the small axis of the molecules, is less than the refractive index Ne coinciding with the major axis
  • the refractive index of the optically transparent dielectric film is chosen equal to or close to No.
  • the refractions of the dielectric film and the LC are equal, and the orthogonal polarization component of the radiation is reflected from the alternating layers of films with large and low refractive indices.
  • Opposite surfaces of the ACE contain a system of optically transparent electrodes (3), and the direction of their location on one surface differs from the direction of location on another,
  • orthogonal for example, orthogonal.
  • NLC molecules When a potential is applied to optically transparent electrodes, NLC molecules rotate with large axes along the electric field, thus being established along the direction of external radiation and for both polarization components of this radiation, the NLC layers become isotropic, and their refractive indices (for transmitted radiation) coincide with those refraction of layers of dielectric films and thus radiation passes through the filter without reflections.
  • NLCs rotate with small axes along this field, and with large axes along the direction specified by at least one orientant deposited on the surfaces of dielectric films and thus, as described above, the reflective filter acquires anisotropy for one of the orthogonal polarization components of external radiation and reflects it, and the second polarization component of the radiation passes through the filter without loss.
  • the polarization plane rotator controlled by an external electric field can have at least one additional system of optically transparent electrodes, which will allow changing it
  • sawtooth structures are installed horizontally and the vertices of one of them
  • optical radiation and, for example, the azimuthal plane If the optical radiation intensity exceeds a predetermined threshold, the corresponding electrodes of the ACE filter are fed
  • control potentials that change the electric field strength in the given zones of the filter, under the influence of which the LC molecules in the layers reorient to the position determined by the orientant deposited on the optically transparent dielectric films, which is applied uniformly in the attenuating structures, and in the rotator
  • the direction of applying the orientant on the input surface of the rotator coincides with the direction of applying the orientant in the first (input) attenuating structure.
  • the polarization component of the radiation passes through the rotator, where its plane of polarization rotates 90 degrees and, like the first, it is scattered and / or reflected in the second attenuating structure and leaves the filter, and if necessary, one of
  • the polarization components of the radiation can be partially passed to the radiation receiver.
  • DFIN polarizing components of optical radiation
  • DFPP position of the receiver
  • SOPE optically transparent electrodes
  • the surfaces of the sawtooth structures contain an antireflection coating.
  • the DFIN gives a signal to the decision-making processor
  • the first attenuating structure is included in the correction mode of the plane of polarization of the radiation passing through it - it matches the plane bone of polarization with the director of the LCD at its input.
  • the polarization components of this radiation are scattered and / or reflected in the corresponding zone from the first ACE structure, and the second polarization component passes further, or through the rotator of the plane of polarization, where its plane of polarization rotates 90 degrees, and falls on the second scattering and / or reflecting structure, which is made and located the same way with the first, and accordingly attenuated in it, and non-polarized radiation for other zones
  • the ACE filter transmits losslessly polarized and non-polarized radiation to the radiation receiver (10) from any direction within the given angles, if its intensity is below the threshold and simultaneously scatters and / or reflects polarized and non-polarized radiation independently from any direction within the specified angles, if its intensity exceeds a predetermined threshold, and with the combined use of ACE filters and polarized radiation from the headlights of vehicles, it will allow:
  • the reflecting structures contains an additional system of optically transparent electrodes (DSPOE) (8), the location of which is parallel to the location of the SOPE (9) on the opposite surface, with a shift relative to them and orthogonal to the location of the SOPE (3) on the same surface (Fig.4b) and installed from the outside with respect to them, and when external radiation exceeds a predetermined threshold, control potentials with a spatial shift are applied to the electrodes of systems with parallel SOPEs (8.9) so that in the electric field created by them is the large axis of the LC molecules
  • the control system supplies potentials close to the potentials to the SOPE (9) on the other side of the filter, thus removing the electric field in the system of alternating layers of optically transparent films in which the large axes of the LC molecules are set in the direction given by at least one an orientant on the surfaces of optically transparent dielectric films in a position close to orthogonal to the direction of external optical radiation and the azimuthal plane.
  • DSOPE electrodes (9) can be installed with a step different from the installation step of SOPE electrodes (8) on the other side of the filter and
  • a similar system of optically transparent electrodes can be used in a filter (ACE) mounted on a windshield
  • Fig. 4c shows a fragment of a vehicle mirror based on an ACE filter with two optically transparent systems with scattering structures in series using an optically transparent dielectric substance and
  • 4 ⁇ 1 shows a fragment of a vehicle mirror based on an ACE filter with two optically transparent systems in series using an optically transparent dielectric substance and a birefringent substance on liquid crystal molecules (LC), with an initial homeotropic
  • the polarization plane rotator contains at least one independent system of optically transparent
  • a multilayer reflective structure using films of optically transparent dielectric material and
  • At least one reflective structure at the input contains at least one LC layer having the effect of dynamic light scattering (18) (DLS) (Fig. Za) [9].
  • DLS dynamic light scattering
  • NLCs nematic LCs
  • each of the reflecting structures for example, lenses or a sawtooth surface, formed using LCs, which under the action of
  • the ACE can be made in the form of glasses, as well as a falling visor on the helmet, for example, a motorcyclist.
  • the control unit, processor, and other nodes can be moved outside the glasses design into an external unit, for example, installed directly in the vehicle, and the automatic two-way communication between them and the APRF can
  • the external unit may contain a control panel for the operating modes of the ACE filter.
  • the external surfaces of ACE filters may have different curvatures for cases of correction of low vision
  • the ACE may have an additional mount for installing lenses correcting impaired vision.
  • At least one of the surfaces of the sawtooth structures contains an optically transparent dielectric film with a lower (or larger) refractive index than the sawtooth structure and having an electrically
  • the surfaces of films of optically transparent dielectric substance contain electrically controlled matching, antireflection films, and the refractive index of films of optically transparent dielectric substance is less than the minimum refractive index of birefringent material on LC molecules with positive dielectric anisotropy and more than the maximum value of the refractive index eniya birefringent substance molecules on LC with negative dielectric anisotropy, wherein the refractive index is electrically controllable matching, antireflective film has an intermediate value between
  • refractive indices for the polarization of radiation which coincides with the long axis of the LC molecules of the birefringent substance and is orthogonal to it.
  • Ni-refractive index of dielectric optically transparent films, ⁇ 2 and N21 -indices refractions of a birefringent substance coinciding with the short and long axes of LC molecules and N31 is the refractive index of electrically controlled matching, antireflection films.
  • controlled matching, antireflection films on LCs deposited on optically transparent substrates the refractive indices of which are consistent with the refractive indices of a nearby LC layer or other optically transparent substance replacing this LC layer and capable of mixing with another LC layer, creating a gradient of refractive index over the film thickness.
  • Such films can be made, for example, using LCs with a homeotropic orientation of molecules, moreover, consisting of two layers having different ⁇ and chosen so that the refractive indices for
  • the polarization of light coinciding with the transverse axis of the molecules of the upper layer was greater than the refractive index of the lower layer and equal to or close to it for the polarization of light coinciding with the long axis of the LC molecules.
  • the LC films in the initial state, will consist of two layers with different values, ⁇ , and have a gradient of refractive index through thickness when mixing the boundary layers, which are consistent with the previous and subsequent layers of optically transparent
  • this layer reorients, creating conditions for the gradient of the refractive index over the film thickness, and with a further increase in the control potential, the molecules of the homeotropically oriented layer change their orientation and also, with equal or close values of the refractive indices , for the polarization of light coinciding with the small axis of the molecules of the LC layers, the medium will be homogeneous.
  • It additionally contains a sensor for assessing the average intensity of external optical radiation, for example, natural emitters and reflectors (sun, clouds, road, vegetation, etc.), natural illumination in the twilight time - this will optimize the work of the DFIN, changing the threshold level in relation to the adaptation
  • the decision processor monitors the modulation value for each of the sources of external radiation and sends the corresponding signals to the control device, changing the depth of modulation of the LC layer or the on time and thus compensating for the resulting modulation.
  • a correction of the magnitude (area) of the APRF reflecting zone can be introduced, which will allow the driver to individually select its * optimal value.
  • the birefringent substance contains an internal orientation [12,13].
  • received radiation which can be used to analyze incoming information in order to exclude the reflection of radiation with useful and necessary information, for example, light of high traffic light or other signals.
  • change the spectral composition of the received radiation contains a filter that corrects its spectrum.
  • the vertices contain light absorbers or reflectors.
  • a system has been introduced to maintain the filter temperature in the operating temperature range.
  • non-polarized radiation which will allow for the smooth introduction of polarized radiation sources - headlights to significantly increase the visibility of oncoming vehicles and

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Mathematical Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)
  • Polarising Elements (AREA)

Abstract

L'invention concerne des dispositifs anti-éblouissement basés à la fois sur un rayonnement polarisé et non polarisé. Le résultat technique obtenu est la création d'un filtre efficace contre l'éblouissement qui présente des pertes minimales et s'adapte à des sources de rayonnement éblouissantes. Ce filtre comprend des systèmes optiquement transparents utilisant une substance diélectrique optiquement transparente et une substance biréfringente sur des molécules de cristaux liquides, ces systèmes étant conçus et agencés de la même manière et diminuant l'intensité du rayonnement qu'ils transmettent. La position des électrodes sur les surfaces de chaque système est différente. Les surfaces de la substance diélectrique contiennent un élément d'orientation qui aligne les axes principaux des molécules de la substance biréfringente sur le composant de polarisation correspondant du rayonnement transmis de sorte que les conditions de dispersion et/ou réflexion soient remplies pour l'un ou pour les deux composants de polarisation du rayonnement. Les indices de réfraction de la substance biréfringente sont très proches de ceux de la substance diélectrique lorsque les axes principaux des molécules de cristaux liquides sont positionnés dans le sens du rayonnement incident, et diffèrent de l'un des composants de polarisation orthogonaux lorsque la position des axes principaux des molécules de cristaux liquides change dans un sens défini par l'élément d'orientation. Les molécules de la substance biréfringente changent d'orientation lorsque l'intensité du rayonnement dépasse un seuil donné.
PCT/RU2010/000493 2009-09-07 2010-09-03 Filtre de polarisation adaptatif Ceased WO2011028152A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
RU2009134066 2009-09-07
RU2009134066/28A RU2413256C1 (ru) 2009-09-07 2009-09-07 Адаптивный поляризационный фильтр (апф)

Publications (2)

Publication Number Publication Date
WO2011028152A2 true WO2011028152A2 (fr) 2011-03-10
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RU2464596C1 (ru) * 2011-03-14 2012-10-20 Владимир Леонтьевич Крапивин Адаптивный поляризационный противослепящий фильтр (аппф)
RU2012110161A (ru) * 2012-03-12 2013-09-20 Владимир Леонтьевич Крапивин Поляризационный противослепящий фильтр (ппф)
RU2530172C1 (ru) * 2013-05-20 2014-10-10 Владимир Леонтьевич Крапивин Управляемый противослепящий фильтр (упф)
RU2607822C1 (ru) * 2016-04-15 2017-01-20 Владимир Леонтьевич Крапивин Управляемый противослепящий рассеивающий фильтр-1 (УПРФ-1)
RU2681664C1 (ru) * 2018-01-09 2019-03-12 Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" Адаптивный поляризационный фильтр
RU2685555C1 (ru) * 2018-02-01 2019-04-22 Владимир Леонтьевич Крапивин Управляемый противослепящий рассеивающий фильтр (упрф)

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FR2685500B1 (fr) * 1991-12-20 1994-12-23 Thomson Csf Separateur optique de polarisations et application a un systeme de visualisation.
FR2808891B1 (fr) * 2000-05-12 2003-07-25 Nemoptic Dispositif bistable d'affichage en reflexion
JP2005300936A (ja) * 2004-04-12 2005-10-27 Konica Minolta Holdings Inc 液晶表示装置
RU2377616C2 (ru) * 2008-02-01 2009-12-27 Владимир Леонтьевич Крапивин Адаптивный поляризационный рефлекторный фильтр (апрф) (варианты)

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