CN102829865A - 45-degree annular illumination reflection spectrum spectrophotometric light path device - Google Patents
45-degree annular illumination reflection spectrum spectrophotometric light path device Download PDFInfo
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- CN102829865A CN102829865A CN2012103553318A CN201210355331A CN102829865A CN 102829865 A CN102829865 A CN 102829865A CN 2012103553318 A CN2012103553318 A CN 2012103553318A CN 201210355331 A CN201210355331 A CN 201210355331A CN 102829865 A CN102829865 A CN 102829865A
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Abstract
The invention discloses a 45-degree annular illumination reflection spectrum spectrophotometric light path device. A 0-degree measurement black cavity is suspended in an integrating sphere body; a collecting lens is arranged in the 0-degree measurement black cavity; a 0-degree measurement hole is formed on the top of the 0-degree measurement black cavity; a calibration lens is correspondingly arranged below the 0-degree measurement black cavity and surrounds the 0-degree measurement black cavity; two annular diaphragm layers are sequentially arranged at the middle part of the integrating sphere body downwards; the semispherical lower surface of the integrating sphere body is arranged above the two annular diaphragm layers; annular transmitting slits are arranged on the two annular diaphragm layers and the semispherical lower surface of the integrating sphere body, and form an included angle of 45 degrees together with the surface normal of a sample to be tested; and a plurality of LED (Light-Emitting Diode) light source arrays are uniformly arranged on the semispherical lower surface of the integrating sphere body around the 0-degree measurement black cavity. The 45-degree annular illumination reflection spectrum spectrophotometric light path device provided by the invention has the advantages that the light of the LED light sources is sufficiently homogenized in a semispherical body; the integrity of the testing spectrum can be ensured; and the measurement repeatability can be ensured.
Description
Technical field
The present invention relates to a kind of optical system for testing device, particularly a kind of 45 degree ring illumination reflectance spectrum spectrophotometric light path devices.
Background technology
In reflectance spectrum spectrophotometer instrument, the selection of testing light source is vital, and under the lighting condition of testing light source, the measurement result of color should be observed the true colors basically identical of object with human eye under natural light.Existing technology generally all is to adopt pulse xenon lamp as testing light source, but because mostly the structure of xenon lamp is strip, is difficult to realize that test zone evenly throws light on.Illumination is also very important with the geometric condition of test; This directly has influence on the precision and the repeatability of test result; In existing color measurement instrument, the measurement of sample reflectance spectrum, 45 °/vertically the illumination and the test structure of (symbol is 45/0) they are to obtain the measurement structure close with human eye perceives.In the national standard 45/0 measurement structure there are three evaluation indexes: repdocutbility, repeatability and the error of indication.Light source is mainly reflected in the influence of three evaluation indexes: the index of repdocutbility is main relevant to the irradiation uniformity coefficient of sample from different directions with light source; Whether the good and bad of the error of indication mainly is evenly distributed relevant in visible-range with light source; Repeatability is main relevant with stability of light source.But insufficient light and orientation appear in this structure easily, and the data differences that promptly can cause during rotation on self plane testing when specimen is very big.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of light source equally distributed 45 degree ring illumination reflectance spectrum spectrophotometric light path devices.
In order to solve above technical matters; The invention provides a kind of 45 degree ring illumination reflectance spectrum spectrophotometric light path devices, suspension is measured black chamber for one 0 ° in an integrating sphere, and measuring in the black chamber for 0 ° has convergent lens; 0 ° of instrument connection is arranged at the top; Below 0 ° of black chamber of measurement collimation lens are arranged accordingly, measure around 0 ° and deceive the chamber, in the middle part of integrating sphere, be provided with two layers of annular diaphragm downwards successively; Two layers of annular diaphragm top are integrating sphere hemisphere lower surface; All have annular transmissive slit on two layers of annular diaphragm He on the integrating sphere hemisphere lower surface, light becomes 45 through the transmissive slit on integrating sphere hemisphere lower surface and the two layers of annular diaphragm with the sample surface normal
0Angle, on integrating sphere hemisphere lower surface, measure black chamber and evenly be laid with a plurality of led light source arrays around 0 °.
Measure black inner cavity surface and apply the black light-absorbing material for said 0 °, and be threaded structure, remove the parasitic light that produces when measuring lens focus in the black chamber by 0 °.
The interior spherical surface of the said integrating sphere first half evenly is coated with full high reflectance diffuse-reflective material.Said integrating sphere hemisphere lower surface is a plane, and the surface adopts the high glaze minute surface as the surface.Make light that led light source sends within it portion carry out diffuse reflection fully, light is evenly distributed in that integrating sphere is inner, realize well even light effect.
Have the aperture of monitoring light source fluctuation on the said integrating sphere first half ball wall, as a reference light path.In order to prevent that the light that led light source sends from not passing through the homogenising of integrating sphere spheroid and being directly incident on reference path, near the integrating sphere hemisphere lower surface place aperture is provided with the reference path baffle plate.The emergent light that guarantees any led light source can not be directly incident on reference path, incide reference path only through diffusing after the integrating sphere spheroid homogenising.The effect of reference path is in order to monitor intensity of light source fluctuation, reference path and measurement main optical path to be tested simultaneously, can removing light source fluctuation to measuring the influence that produces.
Said a plurality of led light source array; Each led light source has driving power and semisphere light diffusion shell; Semisphere light diffusion shell is with the first half of the even directive integrating sphere of led light source; Light after the homogenising is through the transmissive slit on integrating sphere hemisphere lower surface and the two layers of annular diaphragm, until following collimation lens.Integrating sphere hemisphere lower surface is offered a transmissive slit, and from the slit outgoing, through being incident to lens behind two diaphragms, light projects the testee surface through becoming directional light behind these lens through the light after the integrating sphere hemisphere homogenising.Led light source adopts 12 high-power LED light sources to mate, and wherein every group of 6 led light source obtains the interior all spectrum of wave band of required measure spectrum scope through accurate spectrum stack coupling; In addition, on spatial arrangement, two groups of led light sources become the center to be symmetrically distributed, and are convenient to light source and in the space, fully mix and even the distribution.Influence for the own lighting angle of led light source that weakens; On each led light source, designed semisphere light diffusion shell; Make the luminous light intensity angle of each LED be distributed as approximate lambert's body; Enlarged the lighting angle of led light source, the spectrum of being convenient to each wave band mixes in the integrating sphere hemisphere fully.
The specimen mouth is arranged at said collimation lens bottom.Light becomes the diffused light relevant with the sample surface structure to throw with sample surface miter angle direction after the sample reflection.0 degree reflected light is partly through converging at 0 degree instrument connection in the diffused light after the light path effect that lens are formed in the black chamber of condenser lens and test.So far realized the 45 degree light incidents of sample surface annular light source, 0 degree detects.
Superior effect of the present invention is:
1) realized the homogeneity of testing light source: the effect through integrating sphere hemisphere makes led light source luminous in hemisphere full and uniformization; Make that to get light intensity even penetrating the slit place; Guaranteed to incide the only approximately equalised of sample surface, promptly reduced because the influence that different directions incident intensity difference produces measurement result from all directions;
2) adopt a plurality of LED couplings to make the light spectral distribution that penetrates from slit that enough intensity all arranged in the detected light spectral limit, guaranteed the integrality of test spectral;
3) in integration hemisphere, reference path is set, eliminates light source fluctuation to measuring the influence that produces, guaranteed the repeatability of measuring through the monitoring light source fluctuation.
Description of drawings
Fig. 1 is a sectional structure synoptic diagram of the present invention;
Fig. 2 is a perspective view of the present invention;
Fig. 3 is the structural representation of the single led light source of the present invention;
Fig. 4 is the structural representation of led light source array of the present invention;
Label declaration among the figure
1-single led light source; 2-semisphere light diffusion shell;
3-driving power;
10-specimen mouth; 11-integrating sphere Lower Half;
12-integrating sphere first half; 13-collimation lens;
14-annular diaphragm C; 15-annular diaphragm B;
16-integrating sphere hemisphere lower surface; 17-transmissive slit;
18-annular transmissive slit P; 19-annular transmissive slit Q;
The driving power array of 20-led light source; 21-led light source array;
22-semisphere light shield array; Measure black chamber for 23-0 °;
24-convergent lens; 25-helicitic texture;
26-0 ° of instrument connection; 27-aperture;
28-reference path baffle plate; 29-beam split light path M;
30-sensor and signal processing circuit J; 31-beam split light path N;
32-sensor and signal processing circuit K.
Embodiment
See also shown in the accompanying drawing, the present invention is done further description.
As depicted in figs. 1 and 2; The invention provides a kind of 45 degree ring illumination reflectance spectrum spectrophotometric light path devices; Suspension is measured black chamber 23 for one 0 ° in an integrating sphere; Measuring in the black chamber 23 for 0 ° has convergent lens 24, and the top has 26,0 ° of 0 ° of instrument connections to measure and collimation lens 13 arranged accordingly below the black chamber 23; Measure black chamber 23 around 0 °; Be provided with two layers of annular diaphragm B15, C14 downwards successively from the integrating sphere middle part, two layers of annular diaphragm top are integrating sphere hemisphere lower surface 16, all have annular transmissive slit P18 and annular transmissive slit Q19 on annular diaphragm B15, annular diaphragm C14 and the integrating sphere hemisphere lower surface 16; Light becomes 45 with the sample surface normal after passing through annular transmissive slit 17, annular transmissive slit P18 and the annular transmissive slit Q19 on integrating sphere lower surface 16, annular diaphragm B15 and the annular diaphragm C14
0Angle, on integrating sphere hemisphere lower surface 16, measure black chamber and evenly be laid with a plurality of led light source arrays 21 around 0 °.
Measure black chamber 23 inside surfaces and apply the black light-absorbing material for said 0 °, and be threaded structure 25, remove the parasitic light that produces when measuring lens focus in the black chamber 23 by 0 °, and further the light of 0 ° of instrument connection 26 is finally incided in restriction.
The interior spherical surface of the said integrating sphere first half 12 evenly is coated with full barium sulphate, and light portion's diffuse reflection fully within it that led light source array 21 is sent makes light in the inner evenly distribution of integrating sphere.Said integrating sphere hemisphere lower surface 16 is planes, and the surface adopts the high glaze minute surface as the surface.Make light that led light source sends within it portion carry out diffuse reflection fully, light is evenly distributed in that integrating sphere is inner, realize well even light effect.
Have the aperture 27 of monitoring light source fluctuation on the said integrating sphere first half 12 ball walls, as a reference light path.In order to prevent that the light that led light source sends from not passing through the homogenising of integrating sphere spheroid and being directly incident on reference path, near integrating sphere hemisphere lower surface 16 places aperture 27 are provided with reference path baffle plate 28.The emergent light that guarantees any led light source can not be directly incident on reference path, incide reference path only through diffusing after the integrating sphere spheroid homogenising.The effect of reference path is in order to monitor intensity of light source fluctuation, reference path and measurement main optical path to be tested simultaneously, can removing light source fluctuation to measuring the influence that produces.
As shown in Figure 3; Said a plurality of led light source array 21; Each led light source 1 has driving power 3 and semisphere light diffusion shell 2; Semisphere light diffusion shell 2 is with the first half 12 of led light source 1 even directive integrating sphere, after the light after the homogenising passes through annular transmissive slit 17, annular transmissive slit P18 and the annular transmissive slit Q19 on integrating sphere lower surface 16, annular diaphragm B15 and the annular diaphragm C14, until following collimation lens 13.Integrating sphere hemisphere lower surface 16 is offered a transmissive slit 17, and from transmissive slit 17 outgoing, through being incident to lens 13 behind two diaphragms, light projects the testee surface through becoming directional light behind these lens 13 through the light after the integrating sphere hemisphere homogenising.As shown in Figure 4, led light source adopts 12 high-power LED light sources 1 to mate, and wherein every group of 6 led light sources 1 obtain the interior all spectrum of wave band of required measure spectrum scope through accurate spectrum stack coupling; In addition, on spatial arrangement, 1 one-tenth center of two groups of led light sources is symmetrically distributed, and is convenient to light source and in the space, fully mixes and even the distribution.Influence for the own lighting angle of led light source that weakens; On each led light source, designed semisphere light diffusion shell 2; Make the luminous light intensity angle of each LED be distributed as approximate lambert's body; Enlarged the lighting angle of led light source, the spectrum of being convenient to each wave band mixes in the integrating sphere hemisphere fully.
After the light that a plurality of led light source arrays 21 send spreads through semisphere light diffusion shell array 22 fully; Diffuse in the whole integrating sphere first half 12; Light through after the complete diffuse reflection, is transmitted by annular transmissive slit 17 in the integrating sphere first half 21; Become endless belt-shaped light source; Pass through annular transmissive slit P18 and annular transmissive slit Q19 more respectively, further limit the light source incident angle, incide light source on the collimation lens 13 and can be similar to and regard the annular light source of forming by the series of points light source as.The light that collimation lens 13 will incide on it becomes the source of parallel light that becomes 45 with specimen, and this source of parallel light shines on the specimen, has realized annular 45 ° illumination test structure.
0 ° of measured hole 26 is arranged on the top of the integrating sphere first half 12 vertical with specimen.45 ° of sources of parallel light of annular shine on the specimen 10; On specimen 10 surfaces diffuse reflection takes place, the diffuse reflection light source is assembled through collimation lens 13, and the light source after the convergence gets into 0 ° and measures black chamber 23; Get into the helicitic texture 25 in black chamber again through convergent lens 24 backs, arrive 0 ° of measured hole 26.
Measure the light that convergent lens 24 and 0 ° of instrument connection 26 are incided in 23 restrictions of black chamber, guarantee 0 ° of test condition for 0 °.
0 ° of instrument connection 26 is the instrument connection of specimen, and reference path instrument connection 27 is the reference path instrument connection, after meet beam split light path M29, N31, sensor and processing of circuit unit J30, K32.
Claims (7)
1. a degree ring illumination reflectance spectrum spectrophotometric light path device is characterized in that: in an integrating sphere, hang one 0 ° and measure black chamber, in 0 ° of black chamber of measurement convergent lens is arranged; 0 ° of instrument connection is arranged at the top; Below 0 ° of black chamber of measurement collimation lens are arranged accordingly, measure around 0 ° and deceive the chamber, in the middle part of integrating sphere, be provided with two layers of annular diaphragm downwards successively; Two layers of annular diaphragm top are integrating sphere hemisphere lower surface; All have annular transmissive slit on two layers of annular diaphragm He on the integrating sphere hemisphere lower surface, light becomes 45 through the transmissive slit on integrating sphere hemisphere lower surface and the two layers of annular diaphragm with the sample surface normal
0Angle, on integrating sphere hemisphere lower surface, measure black chamber and evenly be laid with a plurality of led light source arrays around 0 °.
2. 45 degree ring illumination reflectance spectrum spectrophotometric light path devices according to claim 1; It is characterized in that: said a plurality of led light source arrays; Each led light source has driving power and semisphere light diffusion shell; Semisphere light diffusion shell is the first half of the even directive integrating sphere of led light source, and the light after the homogenising is through the transmissive slit on integrating sphere hemisphere lower surface and the two layers of annular diaphragm, until following collimation lens.
3. 45 degree ring illumination reflectance spectrum spectrophotometric light path devices according to claim 1 is characterized in that: measure black inner cavity surface coating black light-absorbing material, and be threaded structure for said 0 °.
4. 45 degree ring illumination reflectance spectrum spectrophotometric light path devices according to claim 1, it is characterized in that: the interior spherical surface of the said integrating sphere first half evenly is coated with full high reflectance diffuse-reflective material.
5. 45 degree ring illumination reflectance spectrum spectrophotometric light path devices according to claim 1, it is characterized in that: said integrating sphere hemisphere lower surface is a plane, the surface adopts the high glaze minute surface as the surface.
6. 45 degree ring illumination reflectance spectrum spectrophotometric light path devices according to claim 1; It is characterized in that: the aperture that has the monitoring light source fluctuation on the said integrating sphere first half ball wall; Light path as a reference, near the integrating sphere hemisphere lower surface place aperture is provided with the reference path baffle plate.
7. 45 degree ring illumination reflectance spectrum spectrophotometric light path devices according to claim 1, it is characterized in that: the specimen mouth is arranged at said collimation lens bottom.
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| CN2012103553318A CN102829865A (en) | 2012-09-24 | 2012-09-24 | 45-degree annular illumination reflection spectrum spectrophotometric light path device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698006A (en) * | 2013-12-12 | 2014-04-02 | 中国科学院长春光学精密机械与物理研究所 | 45-degree annular illumination device used for on-line light splitting color photometer |
| CN104457983A (en) * | 2014-12-30 | 2015-03-25 | 青岛市光电工程技术研究院 | Programmable multi-spectral uniform light source and control method thereof |
| CN104713644A (en) * | 2013-12-17 | 2015-06-17 | 南开大学 | Waveguide optical lighting color measurement probe |
| CN106090700A (en) * | 2016-06-06 | 2016-11-09 | 北京理工大学 | Super large subtended angle multispectral lambertian lighting source |
| CN109738062A (en) * | 2019-03-14 | 2019-05-10 | 贵州大学 | A ring light source integrating sphere structure |
| CN110243476A (en) * | 2019-07-18 | 2019-09-17 | 邬伟 | The online non-contact spectrophotometric color measurement instrument full spectrum LED light device of 45 degree of annulars |
| CN114441564A (en) * | 2022-02-25 | 2022-05-06 | 中国船舶重工集团公司第十二研究所 | Device for indicating the center of radiographic inspection and the radiation exposure area |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698006A (en) * | 2013-12-12 | 2014-04-02 | 中国科学院长春光学精密机械与物理研究所 | 45-degree annular illumination device used for on-line light splitting color photometer |
| CN103698006B (en) * | 2013-12-12 | 2015-09-09 | 中国科学院长春光学精密机械与物理研究所 | 45° Ring Illumination Unit for Inline Spectrophotometers |
| CN104713644A (en) * | 2013-12-17 | 2015-06-17 | 南开大学 | Waveguide optical lighting color measurement probe |
| CN104713644B (en) * | 2013-12-17 | 2017-11-17 | 南开大学 | Waveguide optical illumination colour examining probe |
| CN104457983A (en) * | 2014-12-30 | 2015-03-25 | 青岛市光电工程技术研究院 | Programmable multi-spectral uniform light source and control method thereof |
| CN106090700A (en) * | 2016-06-06 | 2016-11-09 | 北京理工大学 | Super large subtended angle multispectral lambertian lighting source |
| CN109738062A (en) * | 2019-03-14 | 2019-05-10 | 贵州大学 | A ring light source integrating sphere structure |
| CN109738062B (en) * | 2019-03-14 | 2024-04-09 | 贵州大学 | Annular light source integrating sphere structure |
| CN110243476A (en) * | 2019-07-18 | 2019-09-17 | 邬伟 | The online non-contact spectrophotometric color measurement instrument full spectrum LED light device of 45 degree of annulars |
| CN110243476B (en) * | 2019-07-18 | 2024-04-05 | 邬伟 | 45-degree annular full-spectrum LED lighting device for online non-contact spectral colorimeter |
| CN114441564A (en) * | 2022-02-25 | 2022-05-06 | 中国船舶重工集团公司第十二研究所 | Device for indicating the center of radiographic inspection and the radiation exposure area |
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Application publication date: 20121219 |