CN204206520U - A kind of adjustable color blackbody source - Google Patents
A kind of adjustable color blackbody source Download PDFInfo
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- CN204206520U CN204206520U CN201420685159.7U CN201420685159U CN204206520U CN 204206520 U CN204206520 U CN 204206520U CN 201420685159 U CN201420685159 U CN 201420685159U CN 204206520 U CN204206520 U CN 204206520U
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Abstract
The utility model provides a kind of adjustable color blackbody source, comprises large integrating sphere, little integrating sphere, xenon source, fiber optic splitter, halogen tungsten lamp light source, selects optical assembly, iris diaphgram, spectra collection system and master control system; Large integrating sphere is connected by iris diaphgram with little integrating sphere; Xenon source is connected with large integrating sphere by fiber optic splitter; Halogen tungsten lamp light source is connected with large integrating sphere; Arrange between fiber optic splitter and large integrating sphere and select optical assembly; Arrange between halogen tungsten lamp light source and large integrating sphere and select optical assembly; Spectra collection Operation system setting is below little integrating sphere light-emitting window; Master control system is connected with selecting optical assembly, spectra collection system, xenon source, halogen tungsten lamp light source respectively.The utility model provide a kind of can accurately, the adjustable color blackbody source of reliable, convenient operation.
Description
Technical field
The utility model belongs to field of optical detection, relates to a kind of adjustable color blackbody source, particularly relates to a kind of tunable light source being similar to absolute black body Planck curve form for 300nm ~ 1100nm.
Background technology
Only sent by light source.Every material launching the various electromagnetic radiation such as ultraviolet, visible ray, infrared ray all can be described as light source, wherein have again lamp and artificial light sources point.Common lamp have sunlight, daytime sky, the night sky, the moon and magnitude, artificial light sources wider, comprise all kinds such as thermal radiation or temperature radiation light source, glow discharge spot lamp, solid luminescence light source, laser, also have candle, oil lamp, flame, electric arc etc. also to belong to artificial light sources.In light source, black matrix is a kind of a kind of light source that comparatively simple formula can be utilized directly to state, and it is also called Planckian radiator or perfect radiator, belongs to thermal radiation or temperature radiation type.The spectral distribution property of absolute black body can be determined by planck formula.Black matrix is the standard of mutual comparison in laboratory, between laboratory, has very important effect.Application in optical metrology, optic test widely, especially all often uses in magnitude simulation, color scale, camera radiometric calibration.But a colour temperature adjustable range is extensive, the blackbody source of spectral line shape standard not easily obtains.
Chinese patent application 201010172593.1 discloses a kind of method that White LED lamp color temperature and luminous flux continues adjustment, this white LED lamp color temperature adjusting method is the lamp cylinder by scribbling three primary colors fluorescent powder, utilize the luminous intensity of two UVLED chips, to excite three primary colors fluorescent powder, realize colour temperature and light leads to continuously adjustabe.The method is only the simple adjustment realizing colour temperature, cannot complete the adjustment of Planckian radiator spectral line shape.
Chinese patent application 200910036845.5 discloses a kind of adjustable color LED and color temperature adjusting method thereof, this LED is by self CPU internal algorithm by red, green and blue LED lamp group, utilize the luminosity regulating LED modules with different colors lamp group, realize the adjustment of colour temperature and brightness.The method is also only the simple adjustment realizing colour temperature, cannot complete the adjustment of Planckian radiator spectral line shape.
Chinese patent application 201110389680.7 discloses a kind of LED color temperature adjusting system and method, the method utilizes microprocessor and the constant current driving unit with two driver modules, the LED luminescence unit that is made up of two LED modules of different colour temperatures, its main bright spot is the change being realized colour temperature by constant current driving unit, the colour temperature after final output proportioning.But this kind of method remains carries out colour temperature coupling by two kinds of different-colour spectral coverages, can not export the absolute black body spectral line of continuous print spectral line shape as planck formula.
Realize in 300 ~ 1100nm wave-length coverage, the absolute black body light source that 2500K to 10000K reference color temperature self-energy is adjustable, in magnitude simulation, color scale, camera radiometric calibration etc., there is demand widely.
Utility model content
In order to solve the above-mentioned technical problem existed in background technology, the utility model provide a kind of can accurately, a kind of adjustable color blackbody source of reliable, convenient operation.
Technical solution of the present utility model is: the utility model provides a kind of adjustable color blackbody source, it is characterized in that: comprise large integrating sphere, little integrating sphere, xenon source, fiber optic splitter, halogen tungsten lamp light source, select optical assembly, iris diaphgram, spectra collection system and master control system; Described large integrating sphere is connected by iris diaphgram with little integrating sphere; Described xenon source is connected with large integrating sphere by fiber optic splitter; Described halogen tungsten lamp light source is connected with large integrating sphere; Arrange between fiber optic splitter and large integrating sphere and select optical assembly; Arrange between halogen tungsten lamp light source and large integrating sphere and select optical assembly; Spectra collection Operation system setting is below little integrating sphere light-emitting window; Described master control system is connected with selecting optical assembly, spectra collection system, xenon source, halogen tungsten lamp light source respectively.Above-mentionedly select optical assembly to comprise to be located at automatically controlled iris diaphgram on integrating sphere and Gauss's spectral pattern filter, automatically controlled iris diaphgram is for adjusting the energy and spectral line shape that input large integrating sphere.
Above-mentioned large integrating sphere has 11 entrances, 1 outlet, and entrance is for receiving xenon lamp, tungsten halogen lamp luminous energy, and outlet is used for exporting the luminous energy after homogenize to little integrating sphere.
Above-mentioned fiber optic splitter is that 7 road silica fiber bundles are divided on 1 tunnel.
Above-mentioned spectra collection system adopts the MAYA2000 type fiber spectrometer of marine optics.
The utility model has the advantages that:
The each automatically controlled iris diaphgram of master control system control that first utilizes the utility model has progressively scanned the mapping relations one by one of the corresponding different spectral line of diverse location and energy, acquisition and recording is carried out by spectra collection system, and in input database, what facilitate follow-up colour temperature to mate calls.
The utility model considers stability and the high-energy of xenon lamp and tungsten halogen lamp, and the LED that utilizes of beyond tradition carries out the shortcoming that energy of light source is not high, stability is inadequate of colour temperature coupling, achieves the color temperature tunability compared with high power, high stability.
The utility model uses Gauss's spectral pattern filter first, this type of filter can extract comparatively continuous, level and smooth, stable spectral line from stable xenon lamp, halogen tungsten lamp light source spectral line, for follow-up colour temperature matching algorithm provides smooth subfunction model, least square approximation is conveniently utilized to complete colour temperature coupling.
The utility model utilizes xenon lamp front end and tungsten halogen lamp rear end spectral line, 7 kinds of Gauss's spectral pattern filters are used to carry out optical electivity from 300nm ~ 650nm from xenon lamp every 100nm, 4 kinds of Gauss's spectral pattern filters are used to carry out optical electivity from 650nm ~ 1100nm from tungsten halogen lamp every 200nm, finally achieve the extraction of stable spectra, and lay a good foundation for the coupling of follow-up colour temperature.
Employ the automatically controlled iris diaphgram of high repetitive positioning accuracy in the utility model, improve precision and the stability of colour temperature adjustment.
Employ high accuracy, highly sensitive fiber spectrometer in the utility model as the collection of final spectroscopic data, improve the reliability of result.
Employ the xenon lamp of ultraviolet enhancement in the utility model, improve the amplitude of ultraviolet band energy, and employ the coating of ultraviolet band high reflectance at integrating sphere inwall, in high color temperature situation, there is remarkable ability.
Accompanying drawing explanation
Fig. 1 is the structural representation of Space Optical System detectivity detection system provided by the utility model;
Fig. 2 is the structural representation selecting optical assembly in the utility model;
Fig. 3 is the spectral radiant emittance curve chart of institute's employing xenon lamp and tungsten halogen lamp in the utility model;
Fig. 4 is the utility model Gauss spectral pattern filter spectral transmittance curve figure
Wherein:
The large integrating sphere of 1-; The little integrating sphere of 2-; 3-xenon source; 4-fiber optic splitter; 5-halogen tungsten lamp light source; 6-selects optical assembly; The automatically controlled iris diaphgram of 7-; 8-Gauss spectral pattern filter; 9-iris diaphgram; 10-spectra collection system; 11-master control system.
Embodiment
See Fig. 1, the utility model provides a kind of adjustable color blackbody source, and this adjustable color blackbody source comprises large integrating sphere 1, little integrating sphere 2, xenon source 3, fiber optic splitter 4, halogen tungsten lamp light source 5, selects optical assembly 6, iris diaphgram 9, spectra collection system 10, master control system 11; Described large integrating sphere 1 is connected by iris diaphgram 9 with little integrating sphere 2; Described xenon source 3 is connected with large integrating sphere 1 by fiber optic splitter 4; Described halogen tungsten lamp light source 5 is connected with large integrating sphere 1; Arrange between fiber optic splitter 3 and large integrating sphere 1 and select optical assembly 6; Arrange between halogen tungsten lamp light source 5 and large integrating sphere 1 and select optical assembly 6; Spectra collection system 10 is arranged on below little integrating sphere 2 light-emitting window; Described master control system 11 is connected with selecting optical assembly 6, spectra collection system 10, xenon source 3, halogen tungsten lamp light source 5 respectively.
Large integrating sphere has 11 entrances, 1 outlet, and entrance is for receiving xenon lamp, tungsten halogen lamp luminous energy, and outlet is used for exporting the luminous energy after homogenize to little integrating sphere.
Xenon source 3 selects ultraviolet enhancement light source, and ultraviolet end energy can be significantly increased.
Fiber optic splitter is that 7 road silica fiber bundles are divided on 1 tunnel.
See Fig. 2, optical assembly 6 is selected to comprise automatically controlled iris diaphgram 7 and Gauss's spectral pattern filter 8, for adjusting the energy and spectral line shape that input large integrating sphere.Automatically controlled iris diaphgram repetitive positioning accuracy can reach 1um, improves the precision of adjustable color blackbody source.The transmittance curve of Gauss's spectral pattern filter is class Gaussian-shaped, is convenient to obtain target function spectral line by 11 tunnel class Gauss light spectral distribution curves.
Spectra collection system selects the MAYA2000 type fiber spectrometer of marine optics.
Master control system is used to the motion of control iris diaphgram, its concrete algorithm packaging is inner in master control system, it is exactly briefly a control software design, its feedback information derives from spectra collection system, if user needs the Planck curve of how many colour temperatures, so master control system just can carry out the adjustment of associated variable diaphragm according to the form of required Planck curve, and the spectral line form spectrum acquisition system that after regulating, whole light source can export carries out collection feedback.If institute's curve of output disagrees, then again carry out interative computation and readjust, until obtain the spectral line satisfied the demands.
The utility model mainly utilizes the automatic selection selecting the automatically controlled iris diaphgram 7 in optical assembly 6 and the xenon source 3 under Gauss's spectral pattern filter 8 pairs of steady operations, halogen tungsten lamp light source 5 to carry out energy and spectral pattern, carry out homogenize eventually through large integrating sphere 1, little integrating sphere 2, obtain a kind of blackbody source of adjustable color temperature.As shown in Figure 3, xenon lamp is comparatively strong at shortwave oriented energy, but there is many places secondary peak at long wave place for the spectral radiant emittance curve of xenon lamp and tungsten halogen lamp, and tungsten halogen lamp is comparatively strong at long wave oriented energy, and two kinds of lamps complement each other, and the spectrum that can realize 300 ~ 1000nm wave band merges.Coordinated with Gauss's spectral pattern filter by automatically controlled iris diaphgram, the above wavelength of xenon source 650nm can be realized, effective suppression of spectral line many places secondary peak, also can realize according to the gating of halogen tungsten lamp light source in the remarkable amplification spectral characteristic of red end.Like this, both make use of the effective energy of ultraviolet enhancement xenon source shortwave part, make use of again the stable energy of halogen tungsten lamp light source at long wavelength part.In addition, by Gauss's spectral pattern bandpass filter (filter spectral transmittance curve is shown in Fig. 4) of design class Gauss transmitance, at different spectrum sectional area, extract required spectral energy, utilize least square fitting method, realize the basic fusion of 2600K ~ 9800K blackbody radiance curve in integrating sphere 1 inside, in integrating sphere 2, complete the even output of institute's fit-spectra.The design parameter of Gauss's spectral pattern filter is in table 1, the selection of its centre wavelength and halfwidth has corresponding rule, namely to ensure that adjacent band has overlapping region, in addition, because the transmittance curve of Gauss's spectral pattern is all very level and smooth, be more conducive to final 11 light paths and produce comparatively level and smooth spectral line, finally realize the fusion of different-colour blackbody source.
Table 1
| Sequence number | Centre wavelength | Halfwidth |
| 1 | 300 | 100 |
| 2 | 350 | 100 |
| 3 | 400 | 100 |
| 4 | 450 | 100 |
| 5 | 500 | 100 |
| 6 | 550 | 100 |
| 7 | 600 | 100 |
| 8 | 700 | 200 |
| 9 | 800 | 200 |
| 10 | 900 | 200 |
| 11 | 1000 | 200 |
Xenon source and halogen tungsten lamp light source are worked under nominal power by Energy control, and its stability can reach 1%@5 hours.The energy that xenon source exports is divided into 7 tunnels by fiber optic splitter, and fiber optic splitter is by silica fiber Shu Zucheng, and its capacity usage ratio is very high.The xenon lamp energy of fiber optic splitter enters in large integrating sphere via selecting optical assembly, the automatically controlled iris diaphgram in optical assembly is selected to be used for adjusting the xenon lamp energy entering integrating sphere, Gauss's spectral pattern filter is used for choosing the xenon lamp energy of different wavelength range, and changes the radiation curve feature finally entering large integrating sphere inside.Halogen tungsten lamp light source, directly via selecting optical assembly to enter in large integrating sphere, selects the effect of optical assembly and corresponding xenon lamp to select the effect of optical assembly identical.The homogenize of the large integrating sphere of light camera lens be strobed, to enter in little integrating sphere homogenize again via iris diaphgram and forms comparatively uniform light.Iris diaphgram can export the energy of light in order to adjust final little integrating sphere.Spectra collection system acquisition mouth is positioned at little integrating sphere light-emitting window bottom, in order to feed back final little integrating sphere light-emitting window place spectral irradiance angle value.Different according to the spectral line that the known different-colour of planck formula is corresponding, the utility model blackbody source is needed to export which colour temperature light, only need be arranged by the input dialogue frame in master control system, master control system just can according to the parameter of input, planck formula is used to calculate corresponding spectral radiant exitance curve, and then by master control system internal database information and corresponding coupling fitting algorithm, calculate each and select the automatically controlled iris diaphgram in optical assembly to need the position moved to.Master control system controls each automatically controlled iris diaphgram and carries out zero-bit initialization operation, and then moves to the stop position of calculating, to ensure the repetitive positioning accuracy moved.Spectra collection system gathers spectral information at little integrating sphere, can calculate colour temperature in little integrating sphere by internal algorithm.Calculates spectral line error by planck formula in the curve of spectrum and the master control system that gather to be greater than ± 5% time, master control system can adjust the electric variable diaphragm of needs movement according to internal algorithm trace, to ensure the precision of simulated spectra curve.
A kind of adjustable color blackbody source of the present utility model, possesses in 300nm ~ 1100nm spectral region, according to the black matrix spectral line that planck formula is corresponding, realizes the automatic adjustment of colour temperature within the scope of 2500K ~ 10000K.Its colour temperature degree of regulation can reach within 5%, and its spectral energy is close to watt level, and not only in power density, the LED that utilizes of beyond tradition carries out the system of colour temperature simulation, and stability is also very high, can reach 3%@10 hours.
A kind of adjustable color blackbody source of the present utility model, its spectra collection system and master control system condition each other, and realize closed loop self feed back function, can be realized the adjustment of colour temperature by automated manner.
A kind of adjustable color blackbody source of the present utility model is highly suitable for the aspects such as magnitude simulation, color scale, camera radiometric calibration and applies, but also can continue to promote the simulation realizing all kinds of irregular spectral line spectral pattern light sources, its engineer applied is in extensive range, is worth being widelyd popularize.
Claims (5)
1. an adjustable color blackbody source, is characterized in that: comprise large integrating sphere, little integrating sphere, xenon source, fiber optic splitter, halogen tungsten lamp light source, select optical assembly, iris diaphgram, spectra collection system and master control system; Described large integrating sphere is connected by iris diaphgram with little integrating sphere; Described xenon source is connected with large integrating sphere by fiber optic splitter; Described halogen tungsten lamp light source is connected with large integrating sphere; Arrange between fiber optic splitter and large integrating sphere and select optical assembly; Arrange between halogen tungsten lamp light source and large integrating sphere and select optical assembly; Spectra collection Operation system setting is below little integrating sphere light-emitting window; Described master control system is connected with selecting optical assembly, spectra collection system, xenon source, halogen tungsten lamp light source respectively.
2. adjustable color blackbody source according to claim 1, is characterized in that: describedly select optical assembly to comprise to be located at automatically controlled iris diaphgram on integrating sphere and Gauss's spectral pattern filter, and automatically controlled iris diaphgram is for adjusting the energy and spectral line shape that input large integrating sphere.
3. adjustable color blackbody source according to claim 2, is characterized in that: described large integrating sphere has 11 entrances, 1 outlet, and entrance is for receiving xenon lamp, tungsten halogen lamp luminous energy, and outlet is used for exporting the luminous energy after homogenize to little integrating sphere.
4. the adjustable color blackbody source according to claim 1 or 2 or 3, is characterized in that: described fiber optic splitter is that 7 road silica fiber bundles are divided on 1 tunnel.
5. adjustable color blackbody source according to claim 4, is characterized in that: described spectra collection system adopts the MAYA2000 type fiber spectrometer of marine optics.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420685159.7U CN204206520U (en) | 2014-11-14 | 2014-11-14 | A kind of adjustable color blackbody source |
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| CN201420685159.7U CN204206520U (en) | 2014-11-14 | 2014-11-14 | A kind of adjustable color blackbody source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378861A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院西安光学精密机械研究所 | Black body light source with adjustable color temperature and color temperature adjusting method for same |
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- 2014-11-14 CN CN201420685159.7U patent/CN204206520U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104378861A (en) * | 2014-11-14 | 2015-02-25 | 中国科学院西安光学精密机械研究所 | Black body light source with adjustable color temperature and color temperature adjusting method for same |
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| GR01 | Patent grant |