CN103206964B - Spectral-weight-tunable weak light magnitude simulation system - Google Patents
Spectral-weight-tunable weak light magnitude simulation system Download PDFInfo
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- CN103206964B CN103206964B CN201210012829.4A CN201210012829A CN103206964B CN 103206964 B CN103206964 B CN 103206964B CN 201210012829 A CN201210012829 A CN 201210012829A CN 103206964 B CN103206964 B CN 103206964B
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Abstract
The invention relates to a spectral-weight-tunable weak light magnitude simulation system. The system comprises a spectral-weight-tunable spectral simulation subsystem and a large-caliber stray light-eliminating star simulator subsystem arranged on an outgoing light path of the spectral-weight-tunable spectral simulation subsystem. The spectral-weight-tunable weak light magnitude simulation system provided by the invention has the advantages of large caliber, stray light elimination and high measurement accuracy.
Description
Technical field
The invention belongs to optical detector technology field, relate to a kind of magnitude simulation system, particularly relate to the Spectral-weight-tunaweak weak light magnitude simulation system of a kind of heavy caliber, eliminate stray light.
Background technology
Carrying out in survey of deep space and astronomical sight, in order to detect the celestial body that brightness is very weak or the distance earth is farther, need to develop some highly sensitive detection cameras, and this detection camera detectivity is very strong, domestic also do not have effective standard test equipment to go to demarcate its detectivity.For the detection camera of routine, domesticly usually by following two kinds of methods, detection camera detectivity to be demarcated: a kind of is take the fixed star of the known magnitude of generally acknowledging in the world in away from the remote mountains in city, then the data collected are processed, complete the calibration to detection camera and demarcation.The shortcoming of this kind of method is: the impact being 1. subject to natural conditions and weather, sometimes waits for continuously and also not necessarily waits until the weather meeting experiment condition in tens days; 2. the absorption of air to spectrum is subject to, the measuring accuracy of atmospheric density and the instability impact of atmospheric transmittance; 3. because air is to the uneven absorption of steller radiation spectrum, the spectral distribution that detection camera is received is different from celestial body actual emanations spectral distribution; 4. to the weak light detection camera of high detectivity, because the scattering of air produces parasitic light, detection camera background is brightened, and weak target information is submerged in dark background; Another kind of scaling method is at use for laboratory star simulator simulation infinite distance asterism, complete the demarcation to detection camera detectivity, this kind of method be not by the impact of weather condition, implement fairly simple, but there is shortcomings equally in the method: 1. because star simulator self-stray light is difficult to eliminate, cannot the higher magnitude of simulating stellar magnitude; 2. domestic at present star simulator effective aperture is less, can not complete the demarcation task of heavy caliber detection camera; 3. simulated spectra is single, and namely the spoke brightness of celestial body can only be simulated in laboratory, can not simulate the radiation spectrum distribution situation of celestial body, causes detection camera calibration not accurate enough.
So should consider parasitic light flooding weak target information to the demarcation of detection camera detectivity, that also will consider to simulate asterism spectrum and actual steller radiation spectrum does not mate the calibration result led to errors.The shortcomings of detection camera detectivity is demarcated with not enough, development and design of the present invention a kind of heavy caliber, the parasitic light that disappears, Spectral-weight-tunaweak weak light magnitude simulation system in order to solve Current Domestic.To meet the high-precision calibrating of detection camera to detectivity under various curve of spectrum distribution situation.
Summary of the invention
In order to solve in background technology existing above-mentioned technical matters, the present invention proposes a kind of heavy caliber, disappear parasitic light and the high Spectral-weight-tunaweak weak light magnitude simulation system of measuring accuracy.
Technical solution of the present invention is: the invention provides a kind of Spectral-weight-tunaweak weak light magnitude simulation system, and its special character is: described Spectral-weight-tunaweak weak light magnitude simulation system comprises spectrum weight adjustable spectrum simulation subsystem and is arranged on the heavy caliber eliminate stray light star simulator subsystem on spectrum weight adjustable spectrum simulation subsystem emitting light path.
Above-mentioned spectrum weight adjustable spectrum simulation subsystem comprises light-source system, beam splitting system, Light intensity regulating system, spectral mixing and monitoring system and control system; Described beam splitting system, Light intensity regulating system and spectral mixing and monitoring system are set in turn on the emitting light path of light-source system; Described control system is connected with monitoring system with light-source system, Light intensity regulating system and spectral mixing respectively.
Above-mentioned light-source system comprises xenon source, parabolic concentrator, slit diaphragm and collimation lens; Described xenon source is arranged in the cavity formed by parabolic concentrator; Described slit diaphragm and collimation lens are successively set on the emitting light path after parabolic concentrator reflection;
Described beam splitting system comprises blazed grating and plus lens; Described blazed grating is arranged on the emitting light path after collimation lens; Described plus lens is arranged on the emitting light path of blazed grating; Light intensity regulating system comprises incident fiber array, dimmer and emergent light fibre array; Described incident optical array is arranged on the emitting light path after plus lens, and the incidence end of described incident optical array overlaps with the image space focal plane of plus lens; Described dimmer is arranged on the emitting light path of incident optical; Described emergent light fibre array is arranged on the emitting light path of dimmer;
Described spectral mixing and monitoring system comprise integrating sphere, spectral radiance meter is popped one's head in and manual iris; Described integrating sphere is arranged on the emitting light path of emergent light fibre array; Described spectral radiance meter probe is arranged on integrating sphere inwall; Described manual iris is arranged on the exit of integrating sphere;
Described control system comprises xenon lamp controller, dimmer controller and spectral radiance meter controller; Described xenon lamp controller is connected with xenon source; Described dimmer controller dimmer is connected; Described spectral radiance meter controller is connected with integrating sphere and for the spectral radiance value of the output that monitors integrating sphere and spectral distribution curve.
Above-mentioned dimmer comprises electric variable diaphragm and relay lens; Described electric variable diaphragm and relay lens are successively set on the emitting light path after incident optical array.
The lens that above-mentioned relay lens is bore is Φ 8mm, focal length is 5mm; Described slit diaphragm is rectangular aperture, and the size of described rectangular aperture is 1mm × 4mm; Described collimation lens is bore is Φ 50mm, focal length is the lens of 150mm; The grating constant of described blazed grating is 3.33 × 10
-3mm, blaze wavelength is 0.5 μm, and blazing angle is 4.3 °, and effectively portraying area is 64mm × 64mm; Described plus lens is bore is Φ 100mm, and focal length is the lens of 300mm; Described incident optical array comprises 168 optical fiber; All optical fiber of described incident optical array divide 4 row's arrangements by regular hexagon; The simple optical fiber diameter of described incident optical array is Φ 1.5mm, and the core diameter of described incident optical array is Φ 1.0mm; Described emergent light fibre array comprises 168 optical fiber, and the simple optical fiber diameter of described emergent light fibre array is Φ 2mm, and the core diameter of described emergent light fibre array is Φ 1.5mm.
Above-mentioned heavy caliber eliminate stray light star simulator subsystem comprises parallel light tube, and described parallel light tube comprises primary mirror, first reflection mirror, second time catoptron, for the third time catoptron and plane mirror; Described plane mirror is arranged on the emitting light path of spectrum weight adjustable spectrum simulation subsystem; Described second time catoptron be arranged on plane mirror and third time catoptron reflected light path on; Described third time catoptron and first reflection mirror be arranged on the reflected light path of second time catoptron; Described primary mirror is arranged on the reflected light path of first reflection mirror; The emergent light of described spectrum weight adjustable spectrum simulation subsystem is gone out through plane mirror, second time catoptron, for the third time catoptron, second time catoptron, first reflection mirror and primary mirror reflects successively.
Above-mentioned heavy caliber eliminate stray light star simulator subsystem also comprises the eliminate stray light assembly being arranged on parallel light tube inside.
Above-mentioned eliminate stray light assembly comprises the diaphragm for eliminating stray light be arranged on for the third time between catoptron and second time catoptron and the delustring cover be arranged on diaphragm for eliminating stray light; Described diaphragm for eliminating stray light be arranged on through third time catoptron to second time catoptron reflected light path on.
Above-mentioned eliminate stray light assembly also comprise be arranged on parallel light tube exit portal inside the first eliminate stray light cylinder, parallel light tube exit portal outside light shield, be arranged on the outside of principal reflection mirror the second eliminate stray light cylinder, be arranged on the 3rd eliminate stray light cylinder outside first reflection mirror and be arranged on second time catoptron and third time catoptron in the middle of light path on delustring body; Described delustring body is that the different delustring cylinder of two bores is spliced; Described diaphragm for eliminating stray light is the light hole of Φ 1mm.
Above-mentioned heavy caliber eliminate stray light star simulator subsystem also comprises star tester, and described star tester is arranged in image planes of parallel light tube.
Advantage of the present invention is:
The difference of Spectral-weight-tunaweak weak light magnitude simulation system provided by the present invention and traditional magnitude simulator is: the 1. Spectral-weight-tunaweak weak light magnitude simulation system that proposes of the present invention, secondary image planes are provided with in optical system, space between secondary image planes and image planes is surrounded an airtight space, secondary image planes are provided with diaphragm for eliminating stray light and light shield.Like this, from the light beam that light source sends, only have the light in effective solid angle can by light shield and from diaphragm for eliminating stray light outgoing, and the light beam beyond effective solid angle that light source sends all is blocked cover and diaphragm for eliminating stray light blocks, thus fundamentally solve the shortcoming that traditional star simulator parasitic light cannot eliminate completely; 2. the Spectral-weight-tunaweak weak light magnitude simulation system of the present invention's proposition, light-source system adopts the tunable type uniform source of light of the curve of spectrum, and this function is by xenon lamp, and blazed grating, dimmer and integrating sphere realize.Compared with traditional star simulator, this light-source system can simulate the radiation spectral line of any celestial body, avoid due to simulation spectral line and the demarcation that brings of actual celestial body spectral line error inaccurate.Specifically, the present invention has the following advantages:
1) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: use blazed grating as beam splitter, with plus lens the monochromatic light of various wavelength is incorporated in different optical fiber respectively again and transmits, reduce system optical energy loss, reduce the volume of system;
2) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: the fiber array using thick fibre core, thin clad, adopts regular hexagon arrangement mode, has very high activity coefficient;
3) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: on 0.35 μm ~ 1.0 μm spectral coverages, employ 84 optical fiber, averaged spectrum resolution is 7.86nm, has higher spectral simulation resolution characteristic;
4) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: use electric variable diaphragm, changes the weight of various wavelength energy automatically, spectral distribution curve as requested can simulate suitable radiation spectrum very easily;
5) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: use integrating sphere to make spectral mixing device, make simulation spectrum out have very high spatial uniformity, angle homogeneity and surface uniformity;
6) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: be provided with spectral radiance meter probe on integrating sphere inwall, can the spoke brightness of Real-Time Monitoring output spectrum and spectral distribution curve;
7) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: be provided with manual iris in integrating sphere exit, can change the size of radiating surface very easily.
8) a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention: owing to being provided with secondary image planes in the optical path, diaphragm for eliminating stray light and the light shield of Φ 1mm is provided with at secondary image planes place, and system is also provided with 3 delustring cylinders and 1 delustring body, and eliminate stray light device effectively can block the parasitic light of system.
A kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention, because system has high eliminate stray light ability, 16 stars such as grade and even higher magnitude can be simulated, solve domestic existing star simulator too large due to system parasitic light, cannot the above magnitude such as high-precision analog 10; Faint light magnitude simulation system of the present invention can provide the uniform area light source of different spectral weight as requested simultaneously, domesticly can only do light source with xenon lamp or halogen tungsten lamp at present, simulated spectra is single, the staking-out work of celestial body detection camera in different spectral power distribution situation cannot be met, so the present invention has filled up the domestic blank cannot simulating any steller radiation spectral line.
Accompanying drawing explanation
Fig. 1 is the structural representation of system provided by the present invention;
Fig. 2 is incident optical array structure enlarged diagram of the present invention;
Fig. 3 is the enlarged diagram of dimmer of the present invention;
Fig. 4 is the enlarged diagram of diaphragm for eliminating stray light of the present invention;
1-xenon source, 2-parabolic concentrator, 3-slit diaphragm, 4-collimation lens, 5-blazed grating, 6-plus lens, 7-incident optical array, 8-dimmer, 81-electric variable diaphragm, 82-relay lens, 9-emergent light fibre array, 10-integrating sphere, the manual iris of 11-, 12-pops one's head in, 13-dimmer controller, 14-spectral radiance meter, 15-xenon source controller, 16-principal reflection mirror, 17-first reflection mirror, 18-second time catoptron, 19-third time catoptron, 20-plane mirror, 21-diaphragm for eliminating stray light, 22-delustring cover, 23-first delustring cylinder, 24-second delustring cylinder, 25-the 3rd delustring cylinder, 26-delustring body, 27-light shield, 28-star tester.
Embodiment
See Fig. 1, a kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention, comprise xenon source 1, parabolic concentrator 2, slit diaphragm 3, collimation lens 4, blazed grating 5, plus lens 6, incident optical array 7, dimmer 8, electric variable diaphragm 81, relay lens 82, emergent light fibre array 9, integrating sphere 10, manual iris 11, probe 12, dimmer controller 13, spectral radiance meter 14, xenon source controller 15, principal reflection mirror 16, first reflection mirror 17, second time catoptron 18, catoptron 19 for the third time, plane mirror 20, diaphragm for eliminating stray light 21, delustring cover 22, first delustring cylinder 23, second delustring cylinder 24, 3rd delustring cylinder 25, delustring body 26, light shield 27, star tester 28, parabolic concentrator 2 is arranged on the outside of xenon source 1, slit diaphragm 3 is arranged on the emitting light path of parabolic concentrator 2, collimation lens 4 is arranged on the emitting light path of slit diaphragm 3, and its focus is positioned on slit diaphragm 4, blazed grating 5 is arranged on the emitting light path of collimation lens 4, make incident light wave generation diffraction, plus lens 6 is arranged on the emitting light path of blazed grating 5, the diffracted wave of different wave length is converged on its focal plane interfere, thus by the spectrum of different wave length separately, realize light splitting, the incidence end of incident optical array 7 is arranged on the focal plane of plus lens 6, exit end is separately positioned on the entrance port of dimmer 8, the incidence end of emergent light fibre array 9 is arranged on the exit portal of dimmer 8, its exit end is arranged on integrating sphere 10, manual iris 11 is arranged in the outlet of integrating sphere 10, probe 12 is arranged on the inwall of integrating sphere 10, principal reflection mirror 16 is arranged on the emitting light path of faint light magnitude simulation system, first reflection mirror 17, second time catoptron 18, catoptron 19 and plane mirror 20 are arranged in the light path between parallel light tube primary mirror 16 and focal plane for the third time, plane mirror 20 is used to turn back system light path, diaphragm for eliminating stray light 21 is arranged in the secondary image planes of star simulator, delustring cover 22 is arranged on the outside (see Fig. 4) of diaphragm for eliminating stray light 21, second eliminate stray light cylinder 3 arranges in the optical emission exit of star simulator, second eliminate stray light cylinder 4 is in the outside of principal reflection mirror 16, second eliminate stray light cylinder 5 is arranged on the outside of second time catoptron 18, delustring body 26 arranges in the light path in the middle of star simulator secondary image planes and image planes, light shield 27 is arranged on outside the exit portal of faint light magnitude simulation system, star tester 28 is arranged on the focal plane of star simulator, dimmer controller 13, spectral radiance meter 14 and xenon lamp controller 15 are arranged on the outside of system, for controlling spoke brightness value and the spectral distribution of the output of whole simulation system.
The spectrum that xenon source 1 sends converges on slit diaphragm 3 through parabolic concentrator 2, after slit diaphragm 3 is modulated, forming collimated light beam by collimation lens 4 incides on blazed grating 5, secondary color collimated light beam is after blazed grating 5 diffraction, the emergence angle of different wave length spectrum is different relative to the emergence angle of grating face normal, again after plus lens 6 converges, the focal plane of plus lens 6 is launched and interferes, form colored interference fringe, the spectral energy of different wave length is collected in different optical fiber and is transferred to dimmer 8 by incident optical array 7, the size of relay lens clear aperture is changed by electronic diaphragm 81, realize the adjustment (see Fig. 3) of light intensity, light after adjustment converges in emergent light fibre array 9 through relay lens 82, integrating sphere 10 is transferred to again through emergent light fibre array 9, in the diffuse reflection of integrating sphere 10 inwall, the light wave of various wavelength is mixed again, export from integrating sphere mouth.Manual iris 11 is used for changing the size of outgoing light source useful area, dimmer controller 12 is used for controlling effective clear aperture of electric variable diaphragm 81, thus the spectral energy of adjustment corresponding wavelength, the spectral radiance value that spectral radiance meter 13 is used for monitoring that integrating sphere 10 exports and spectral distribution curve, xenon source controller 14 is used to control xenon source 1.The present invention utilizes said system to simulate the uniform area light source of different weight spectral distribution just.
The spectrum that xenon lamp is launched is after said system carries out illuminating star tester from the outgoing of integrating sphere exit portal after spectrum adjusting, reflection through plane mirror enters star simulator, finally form parallel beam outgoing from star simulator exit portal, the beam solid angle sent due to integrating sphere light source is far longer than the solid angle corresponding to the F# of parallel light tube, so the luminous energy overwhelming majority that light source sends can not simulate the luminous energy that infinite distance asterism sends, and become the parasitic light to star simulator systemic adverse through the diffuse reflection of system inwall, and existing star simulator just arranges in internal system the device that some block parasitic light, can not effectively stop parasitic light from the outgoing of system exit mouth.In order to fundamentally solve the impact of parasitic light on system magnitude simulation precision, originally a kind of new optical system of star simulator structure is proposed, secondary image planes are increased in Conventional parallel light pipe light path, and with delustring body the light path in the middle of secondary image planes and image planes formed one airtight, a diaphragm for eliminating stray light and delustring cover are installed on secondary is practised physiognomy be used for absorbing and blocking parasitic light, effective simulation light beam smoothly by diaphragm for eliminating stray light and delustring hood-shaped become parallel beam from the outgoing of star simulator exit portal.The present invention utilizes said system to realize the eliminate stray light function of faint light magnitude simulation system just.
Concrete principle is as follows:
1. spectral weight is tunable realizes principle
The spectral energy polished object face condenser 2 that xenon source 1 gives off converges on slit diaphragm 3, the clear field of slit diaphragm 3 is 1mm × 4mm, slit diaphragm 3 is positioned on the object space focal plane of collimation lens 4 simultaneously, effective clear aperature of collimation lens 4 is Φ 50mm, focal length is 150mm, plane blazed grating 5 is arranged on collimation lens 4 about 400mm place afterwards, the spot size of collimated light beam on plane grating 5 through collimation lens 4 outgoing is Φ 60mm, the face of portraying of blazed grating 5 is rectangle, useful area is 64mm × 64mm, so, all luminous energies are all effectively reflected and diffraction, on the direction of diffraction light outgoing, it is 300mm that a focal length has been installed at distance blazed grating 500mm place, bore is the plus lens 6 of 100mm, according to the characteristic dimension of blazed grating, the focal length of blazing angle and plus lens 6 calculates known, the light wave of 350nm ~ 1000nm arranges overall width and is about 63mm on plus lens focal plane, length is about 8mm.The incidence end of incident optical array 7 is arranged on the focal plane of plus lens 6, like this, the homogeneous beam that plus lens 6 focal plane is converged will be incorporated in different optical fiber respectively, incident optical array 7 comprises 168 optical fiber altogether, 4 rows' arrangement (see Fig. 2) are divided by regular hexagon, often arrange 42, the external diameter of simple optical fiber is Φ 1.5mm, and core diameter is Φ 1.2mm.So fiber array two rows fiber core overlap width is 0.45mm, the spectral energy being positioned at optical fibre packages coating place can be avoided like this to lose in a large number and cause final spectrum discontinuous.Spectral energy is collected, so the averaged spectrum resolution of this spectral simulation device can reach 7.8nm owing to employing 84 optical fiber on the spectral coverage of 350nm ~ 1000nm altogether.Monochromatic spectrum is input in dimmer 8 respectively through incident optical array 7, dimmer 8 contains 168 junior units altogether, each junior unit controls the output power of an optical fiber luminous energy separately, when spectrum is incident from the incidence end of dimmer 8, the size changing the effective clear aperture of relay lens 82 through electric variable diaphragm 81 reaches the object adjusting spectral output power, after relay lens 82 converges, in the outgoing optical fiber that effective spectrum is integrated, 168 outgoing optical fiber composition emergent light fibre arrays 9 are by the integrating sphere 10 of the spectral transmissions after adjustment, the inwall of integrating sphere 10 is high irreflexive equal and coating, the spectrum that 168 optical fiber export is mixed again, form uniform spectrum from the outgoing of integrating sphere mouth.The spectral radiance meter 11 spectral energy distribution curve of Real-Time Monitoring integrating sphere inside and the spectral radiance value from the outgoing of integrating sphere mouth, manual iris 10 is used for changing the size of uniform area light source.
2. eliminate stray light functional realiey principle
After integrating sphere light source illuminates star tester with the light that 2 π (Sr) solid angle sends, the luminous energy that asterism gives off covers the space of 2 π (Sr) solid angle, luminous energy in this 2 π (Sr) solid angle space is by cosine radiator distribution, and total light flux is π LS.The F#=10 of general star simulator system, the aperture angle U=2.86 ° of corresponding optical system, the solid angle surrounded of the emergent pupil focusing place asterism light source of star simulator system is 0.031 (Sr), the luminous flux comprised is 0.031LS, and the total light flux of asterism radiation is π LS, can calculate, the luminous energy given off from asterism only has the energy less than 1% to be really useful luminous energy, and all the other energy exposure of 99% form parasitic light to simulation system inwall, due to a lot (diffuse reflection of system inwall of reason that parasitic light is formed, scattering, the scattering of optical glass and diffraction by aperture etc.), the distribution of parasitic light can not by accurate trace and calculating.Traditional star simulator just installs light shield around each optical glass of system, and system inwall is done the black process of dye, but this effectively can not eliminate the parasitic light of system.The star simulator of the design's development adds two image planes in the optical path, and the light path in the middle of secondary image planes and image planes is bundled into an airtight space with occulter, the light hole (diaphragm for eliminating stray light) that installation one is of moderate size is gone out in secondary image planes, like this, 1% efficient beam will pool one and the sizable hot spot of light hole in secondary image planes, shine a lower catoptron smoothly, and all the other 99% light forming parasitic light can be absorbed by inwall through reflection repeatedly in this airtight space.
The present invention uses color dispersion-type optical device to be integrated in fiber array by polychromatic light by wavelength spaced apart, through fiber array, the spectrum of different wave length is transferred in dimmer respectively, dimmer leads to light quantity by the required each wavelength of spectral energy weight adjusting, finally by outgoing optical fiber, the spectrum after adjustment is outputted in integrating sphere and mixes, then evenly export required spectral distribution energy from integrating sphere mouth; By arranging secondary image planes in optical system, and secondary image planes and image planes are surrounded an airtight space with occulter, secondary image planes arrange a light hole be of moderate size (diaphragm for eliminating stray light), like this, 1% efficient beam will pool one and the sizable hot spot of light hole in secondary image planes, shine a lower catoptron smoothly, and all the other 99% light forming parasitic light can be absorbed by inwall through reflection repeatedly in this airtight space.A kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention, solve traditional star simulator due to parasitic light too greatly cannot the difficult problem of the faint asterism target of high-precision analog; Fill up the domestic blank cannot simulating the light source of the distribution of any optic spectrum line.
A kind of Spectral-weight-tunaweak weak light magnitude simulation system of the present invention has very high eliminate stray light ability and the adjustable function of optic spectrum line weight, and can realize existing star simulator cannot the spectral information of simulated target celestial body and the monochrome information of weak target; Meanwhile, the present invention also can be used for other spectrophotometric data (focal length, visual field, MTF, visual resolution, blur circle barycenter etc.) testing camera.
Claims (7)
1. a Spectral-weight-tunaweak weak light magnitude simulation system, is characterized in that: described Spectral-weight-tunaweak weak light magnitude simulation system comprises spectrum weight adjustable spectrum simulation subsystem and is arranged on the heavy caliber eliminate stray light star simulator subsystem on spectrum weight adjustable spectrum simulation subsystem emitting light path;
Described spectrum weight adjustable spectrum simulation subsystem comprises light-source system, beam splitting system, Light intensity regulating system, spectral mixing and monitoring system and control system; Described beam splitting system, Light intensity regulating system and spectral mixing and monitoring system are set in turn on the emitting light path of light-source system; Described control system is connected with monitoring system with light-source system, Light intensity regulating system and spectral mixing respectively;
Described light-source system comprises xenon source, parabolic concentrator, slit diaphragm and collimation lens; Described xenon source is arranged in the cavity formed by parabolic concentrator; Described slit diaphragm and collimation lens are successively set on the emitting light path after parabolic concentrator reflection;
Described beam splitting system comprises blazed grating and plus lens; Described blazed grating is arranged on the emitting light path after collimation lens; Described plus lens is arranged on the emitting light path of blazed grating; Light intensity regulating system comprises incident fiber array, dimmer and emergent light fibre array; Described incident optical array is arranged on the emitting light path after plus lens, and the incidence end of described incident optical array overlaps with the image space focal plane of plus lens; Described dimmer is arranged on the emitting light path of incident optical; Described emergent light fibre array is arranged on the emitting light path of dimmer;
Described spectral mixing and monitoring system comprise integrating sphere, spectral radiance meter is popped one's head in and manual iris; Described integrating sphere is arranged on the emitting light path of emergent light fibre array; Described spectral radiance meter probe is arranged on integrating sphere inwall; Described manual iris is arranged on the exit of integrating sphere;
Described control system comprises xenon lamp controller, dimmer controller and spectral radiance meter controller; Described xenon lamp controller is connected with xenon source; Described dimmer controller is connected with dimmer; Described spectral radiance meter controller is connected with integrating sphere and for the spectral radiance value of the output that monitors integrating sphere and spectral distribution curve;
Described heavy caliber eliminate stray light star simulator subsystem comprises parallel light tube, and described parallel light tube comprises primary mirror, first reflection mirror, second time catoptron, for the third time catoptron and plane mirror; Described plane mirror is arranged on the emitting light path of spectrum weight adjustable spectrum simulation subsystem; Described second time catoptron be arranged on plane mirror and third time catoptron reflected light path on; Described third time catoptron and first reflection mirror be arranged on the reflected light path of second time catoptron; Described primary mirror is arranged on the reflected light path of first reflection mirror; The emergent light of described spectrum weight adjustable spectrum simulation subsystem is gone out through plane mirror, second time catoptron, for the third time catoptron, second time catoptron, first reflection mirror and primary mirror reflects successively.
2. Spectral-weight-tunaweak weak light magnitude simulation system according to claim 1, is characterized in that: described dimmer comprises electric variable diaphragm and relay lens; Described electric variable diaphragm and relay lens are successively set on the emitting light path after incident optical array.
3. Spectral-weight-tunaweak weak light magnitude simulation system according to claim 2, is characterized in that: the lens that described relay lens is bore is Φ 8mm, focal length is 5mm; Described slit diaphragm is rectangular aperture, and the size of described rectangular aperture is 1mm × 4mm; Described collimation lens is bore is Φ 50mm, focal length is the lens of 150mm; The grating constant of described blazed grating is 3.33 × 10
-3mm, blaze wavelength is 0.5 μm, and blazing angle is 4.3 °, and effectively portraying area is 64mm × 64mm; Described plus lens is bore is Φ 100mm, and focal length is the lens of 300mm; Described incident optical array comprises 168 optical fiber; All optical fiber of described incident optical array divide 4 row's arrangements by regular hexagon; The simple optical fiber diameter of described incident optical array is Φ 1.5mm, and the core diameter of described incident optical array is Φ 1.0mm; Described emergent light fibre array comprises 168 optical fiber, and the simple optical fiber diameter of described emergent light fibre array is Φ 2mm, and the core diameter of described emergent light fibre array is Φ 1.5mm.
4. the Spectral-weight-tunaweak weak light magnitude simulation system according to the arbitrary claim of claim 1-3, is characterized in that: described heavy caliber eliminate stray light star simulator subsystem also comprises the eliminate stray light assembly being arranged on parallel light tube inside.
5. Spectral-weight-tunaweak weak light magnitude simulation system according to claim 4, is characterized in that: described eliminate stray light assembly comprises the diaphragm for eliminating stray light be arranged on for the third time between catoptron and second time catoptron and the delustring cover be arranged on diaphragm for eliminating stray light; Described diaphragm for eliminating stray light be arranged on through third time catoptron to second time catoptron reflected light path on.
6. Spectral-weight-tunaweak weak light magnitude simulation system according to claim 5, is characterized in that: described eliminate stray light assembly also comprise be arranged on parallel light tube exit portal inside the first delustring cylinder, parallel light tube exit portal outside light shield, be arranged on the outside of principal reflection mirror the second delustring cylinder, be arranged on the 3rd delustring cylinder outside first reflection mirror and be arranged on second time catoptron and third time catoptron in the middle of light path on delustring body; Described delustring body is that the different delustring cylinder of two bores is spliced; Described diaphragm for eliminating stray light is the light hole of Φ 1mm.
7. Spectral-weight-tunaweak weak light magnitude simulation system according to claim 6, is characterized in that: described heavy caliber eliminate stray light star simulator subsystem also comprises star tester, and described star tester is arranged in image planes of parallel light tube.
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| CN105629464A (en) * | 2016-02-18 | 2016-06-01 | 中国科学院国家空间科学中心 | Diffraction-limiting imaging pseudo star source simulation system based on single reflector |
| CN106017508B (en) * | 2016-05-26 | 2019-03-26 | 长春理工大学 | A kind of spectrum uniform light source that the waveform for star simulator is continuously adjustable |
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