CN103983430A - Device and method for testing out-band relative spectral responsivity of solar blind ultraviolet image intensifier - Google Patents
Device and method for testing out-band relative spectral responsivity of solar blind ultraviolet image intensifier Download PDFInfo
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- CN103983430A CN103983430A CN201410172204.3A CN201410172204A CN103983430A CN 103983430 A CN103983430 A CN 103983430A CN 201410172204 A CN201410172204 A CN 201410172204A CN 103983430 A CN103983430 A CN 103983430A
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Abstract
The invention discloses a device and method for testing the out-band relative spectral responsivity of a solar blind ultraviolet image intensifier, and relates to the technical field of parameter testing of the solar blind ultraviolet image intensifier. The problem that the relative spectral responsivity of a solar blind ultraviolet image intensifier cannot be accurately tested due to the extremely low out-band response is solved. The device comprises a light source, a dark box, a telescopic shielding case, a convergent lens, a trap detector, a shielding box and an electrometer. The telescopic shielding case is placed between a light inlet and the light source and is used for shielding the environment stray light nearby the light source from entering the dark box. The convergent lens is placed inside the telescopic shielding case and is used for completely collecting the emergent light of the light source so as to facilitate testing. The trap detector is placed inside the dark box and is used for detecting the output light currents of the light source. The shielding box is placed inside the dark box and is used for containing the image intensifier to be tested and for conducting effective electromagnetic shielding on the image intensifier to be tested. The electrometer is connected with the signal output end of the image intensifier and is used for detecting output electric signals passing through the image intensifier to be tested of the light source. The device for testing the out-band relative spectral responsivity of the solar blind ultraviolet image intensifier is simple in structure and high in operability.
Description
Technical field
The present invention relates to a day blind ultraviolet imaging enhancer parameter testing technical field, be specifically related to proving installation and the method for the outer relative spectral response of day blind ultraviolet imaging enhancer band.
Background technology
The development of blind ultraviolet ICCD of day is that a day blind ultraviolet imagery is surveyed one of critical core technology, the outer relative spectral response of its band refers near ultraviolet, the visible and responding ability of near infrared spectral coverage to incident irradiation, it is good and bad for the responding ability of out-of-band radiation that this parameter is mainly used in embodying day blind ultraviolet ICCD, and accurately the outer relative spectral response of calibration tape is significant for the spectrum Optimized Matching and then the elevator system signal to noise ratio (S/N ratio) that realize itself and optical filter.Comparatively ripe for the photoelectric parameter testing research of visible-light detector and infrared eye at present, but due to ultraviolet ICCD detection principle and visible ray and infrared eye different, method of testing can not be general, and system complexity is high, parameter difficulty of test is larger, and the therefore domestic report of the research about ultraviolet ICCD performance parameter measurement aspect seldom.Zhao Yuhuan equals the relative spectral response that adopts direct comparison method to measure ultraviolet ICCD in 2009, and the scientific research level spectrometer based on having excellent ultraviolet responding ability has been set up ultraviolet ICCD measurement of spectral response device.But the method only can be tested relative spectral response in the band of 220nm-300nm spectral coverage ultraviolet ICCD, for spectral coverage more than 300nm, because ICCD responsiveness is lower and the proving installation sensitivity of its foundation and precision not cannot be tested.In addition, the method adopts gray-scale value as the relative spectral response of output signal calculating detector, because the increase of gray-scale value along with ICCD gain increases, therefore has very large uncertainty.Ultraviolet ICCD is formed by encapsulation such as image intensifier, optical fiber cone, CCD and electronic circuits.Once encapsulate, some key parameters can only be known by inference by the parameter such as gray-scale value or photon number as described above indirectly as relative spectral response etc.Compared to ultraviolet ICCD complete machine, merely image intensifier is wherein carried out to the test of relative photo electric parameter, not only more can be intuitively and characterize accurately the performance of ultraviolet ICCD, also can further instruct domestic research institute to carry out process modification, and then raising device performance, meet the performance requirement of present stage to ultraviolet ICCD, promote the development of China's ultraviolet imagery Detection Techniques.
Summary of the invention
The present invention solves cannot accurately characterize day blind ultraviolet ICCD relatively spectrum response and because its band is outer, respond extremely low, cause the problem that cannot accurately test with outer relative spectral response, the invention provides relative spectral response proving installation and method outside a kind of day blind ultraviolet imaging enhancer band.The outer relative spectral response proving installation of blind ultraviolet imaging enhancer band of day, comprises light source;
Camera bellows, is positioned at described light source the place ahead, and the side of camera bellows is provided with a light inlet;
Scalable radome, between described light inlet and described light source;
Convergent lens, is positioned at described scalable radome, for light source emergent light is all collected for test;
Trap detector, is positioned at described camera bellows inner, for surveying the output photoelectric stream of described light source;
Shielding box, is positioned at described camera bellows inner, for containing, carries image intensifier to be measured, and described image intensifier to be measured is carried out to effective electromagnetic screen;
Electrometer, connects the output signal end of described image intensifier to be measured, for probe source by the output electrical signals after image intensifier to be measured.
The outer relative spectral response method of testing of blind ultraviolet imaging enhancer band of day, the method is realized by following steps:
Step 1, close the light inlet of camera bellows, make on trap detector unglazed shine into into, measure the output electrical signals of described trap detector as dark current noise, by trap detector zeroing, and dark current noise is carried out to zero compensation;
Step 2, open the light inlet of camera bellows, by the output photoelectric stream I of trap detector probe source
0(λ), then close the light inlet of camera bellows, make on described day blind ultraviolet imaging enhancer to be measured unglazed shine into into, the output electrical signals of measuring image intensifier to be measured by electrometer, as dark current noise, is set as described dark current noise the reference value of electrometer;
Step 3, by described electrometer measurement light source by the output electrical signals I of day blind ultraviolet imaging enhancer to be measured
t(λ);
Step 4, the electric signal obtaining according to step 2 and step 3, calculate the outer relative spectral response of day blind ultraviolet imaging enhancer band:
In formula, σ
0relative spectral response for trap detector.
Beneficial effect of the present invention: the of the present invention day outer relative spectral response proving installation of blind ultraviolet imaging enhancer band, for measuring the extremely low outer relative spectral response of blind ultraviolet imaging enhancer band of day of the outer response of band, easy operating simple in structure, the whole robotizations of test process, quickness and high efficiency; Device of the present invention has increased the dynamic range of day blind ultraviolet imaging enhancer measurement relative spectral response, significant for the spectrum Optimized Matching and then the elevator system signal to noise ratio (S/N ratio) that realize day blind ultraviolet imaging enhancer and optical filter.
Accompanying drawing explanation
Fig. 1 is the vertical view of the of the present invention day outer relative spectral response proving installation of blind ultraviolet imaging enhancer band;
Fig. 2 is the side view of the of the present invention day outer relative spectral response proving installation of blind ultraviolet imaging enhancer band;
Fig. 3 is the process flow diagram of the of the present invention day outer relative spectral response method of testing of blind ultraviolet imaging enhancer band.
Embodiment
Embodiment one, in conjunction with Fig. 1 and Fig. 2, present embodiment is described, the outer relative spectral response proving installation of day blind ultraviolet imaging enhancer band, comprising:
Light source 1, for a series of arrowbands high stable mW level and be added with the LED of collimator objective, presses wavelength order horizontal positioned along sustained height; Camera bellows 2, is positioned at described light source 1 the place ahead, and side is provided with a light inlet, can avoid test to be subject to the impact of environment parasitic light; Scalable radome 3, between described light inlet and described light source 1, is used for shielding near described light source 1 environment parasitic light and enters camera bellows; Convergent lens 4, is positioned at described scalable radome 3, for described light source 1 emergent light is all collected for test; Trap detector 5, is positioned at described camera bellows 2 inside, for surveying the output photoelectric stream of described light source 1; Shielding box 7, is positioned at described camera bellows 2 inside, for containing, carries image intensifier to be measured, and described image intensifier to be measured is carried out to effective electromagnetic screen; Electrometer 11, connects described image intensifier output signal end to be measured, for surveying described light source 1 by the output electrical signals after described image intensifier to be measured.
Described in convergent lens 4 positional distances described in present embodiment, trap detector 5 is described convergent lens 4 focal length with described shielding box 7.Described trap detector 5 is used in conjunction with sniffer 10, and the relative spectral response of described trap detector 5 is known, and described sniffer 10 is low current amplifier.Described shielding box 7 materials are iron, can effectively shield static, and surface is sprayed with aluminium oxide black and sprays paint and prevent reflect stray light.The sensitivity of described electrometer 11 is less than or equal to 10
-12a magnitude.
In present embodiment, also comprise: precision displacement platform 8, be positioned at the below of described trap detector 5 and described shielding box 7, for controlling the position of described trap detector 5 and described shielding box 7, make described trap detector 5 and shielding box 7 aim in turn described camera bellows 2 light inlets; Camera bellows guide rail 9, is positioned at described camera bellows 2 belows, is used for moving the position of described camera bellows 2, makes described light inlet aim at successively described light source 1; Optical table 12, is used for containing a year described day blind ultraviolet filter band and ends depth test device outward.Described precision displacement platform 8 is automatically controlled displacement platform with described camera bellows guide rail 9, can pass through its locus of computer programming Automatic Control.
Embodiment two, in conjunction with Fig. 3, present embodiment is described, present embodiment is the method for testing of the outer relative spectral response proving installation of blind ultraviolet imaging enhancer band of day described in embodiment one, comprises the following steps:
One, by described trap detector 5 test dark current noises, and to its compensation of returning to zero.This step is specially: the light inlet of closing described camera bellows 2 make on described trap detector 5 unglazed shine into into, the output electrical signals of measuring described trap detector 5 is dark current noise, and trap detector zeroing is now compensated dark current noise.
Two, the output photoelectric of surveying described light source 1 by described trap detector 5 flows.This step is specially: regulate described camera bellows guide rail 9 to make described light source 1 aim at the light inlet of described camera bellows 2, adjustment precision displacement platform 8 makes described trap detector 5 aim at the light inlet of described camera bellows 2.By described trap detector 5, surveyed the output photoelectric stream I of described light source 1
0(λ).
Three, by described electrometer 11, surveyed after dark current noise, the described dark current noise of described electrometer 11 is made as to reference value compensation.This step is specially: the light inlet of closing described camera bellows 2, make on described day blind ultraviolet imaging enhancer to be measured unglazed shine into into, by described electrometer 11, measured the output electrical signals of described image intensifier to be measured, be dark current noise, described dark current noise be now made as to the reference value of described electrometer 11.Dark current is made as after reference value, and all measuring current values all can deduct dark current, finally see that the electric current demonstrating on display screen is current value really and accurately.
Four, by described electrometer 11, measure described light source 1 by the output electrical signals of described to be measured day blind ultraviolet imaging enhancer.This step is specially: adjustment precision displacement platform 8 makes described day blind ultraviolet imaging enhancer to be measured aim at the light inlet of described camera bellows 2.By described electrometer 11, measure described light source 1 by the output electrical signals I of described to be measured day blind ultraviolet imaging enhancer
t(λ).
Five,, according to the above-mentioned parameter obtaining, calculate the outer relative spectral response of image intensifier band as follows:
In formula, σ
0relative spectral response for trap detector.
Six, control the described light source 1 that described light inlet that described camera bellows guide rail 9 makes described camera bellows 2 is aimed at different spectrum successively, repeating step one, to more than five times, is measured the outer relative spectral response of image intensifier band under the different spectrum of described light source 1.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and substitute and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the outer relative spectral response proving installation of day blind ultraviolet imaging enhancer band, is characterized in that, comprising:
Light source (1);
Camera bellows (2), is positioned at the place ahead of described light source (1), and the side of described camera bellows (2) is provided with a light inlet;
Scalable radome (3), is positioned between described light inlet and described light source (1);
Convergent lens (4), is positioned at described scalable radome (3), for light source (1) emergent light is all collected for test;
Trap detector (5), is positioned at described camera bellows (2) inside, for surveying the output photoelectric stream of described light source (1);
Shielding box (7), is positioned at described camera bellows (2) inside, for containing, carries image intensifier to be measured (6), and described image intensifier to be measured (6) is carried out to effective electromagnetic screen;
Electrometer (11), connects the output signal end of described image intensifier to be measured (6), for probe source (1) by the output electrical signals after image intensifier to be measured (6).
2. the outer relative spectral response proving installation of day blind ultraviolet imaging enhancer band according to claim 1, it is characterized in that, described light source (1) is arrowband high stable mW level the LED that is added with collimator objective, and described LED presses wavelength order horizontal positioned along sustained height.
3. the according to claim 1 day outer relative spectral response proving installation of blind ultraviolet imaging enhancer band, is characterized in that, described convergent lens (4) positional distance trap detector (5) is described convergent lens (4) focal length with shielding box (7).
4. the outer relative spectral response proving installation of day blind ultraviolet imaging enhancer band according to claim 1, it is characterized in that, described trap detector (5) is used in conjunction with sniffer (10), and the relative spectral response of described trap detector (5) is known; Described sniffer (10) is low current amplifier.
5. the outer relative spectral response proving installation of day blind ultraviolet imaging enhancer band according to claim 1, is characterized in that, described shielding box (7) material is iron, can effectively shield static, and surface is sprayed with aluminium oxide black and sprays paint, and prevents reflect stray light.
6. the according to claim 1 day outer relative spectral response proving installation of blind ultraviolet imaging enhancer band, is characterized in that, the sensitivity of described electrometer (11) is less than or equal to 10
-12a magnitude.
7. according to the outer relative spectral response proving installation of blind ultraviolet imaging enhancer band of day described in claim 1-6 any one, it is characterized in that, also comprise
Precision displacement platform (8), be positioned at the below of described trap detector (5) and described shielding box (7), the position that is used for controlling described trap detector (5) and described shielding box (7), makes described trap detector (5) and shielding box (7) aim in turn the light inlet of described camera bellows (2);
Camera bellows guide rail (9), is positioned at the below of described camera bellows (2), and the position for mobile described camera bellows (2), makes light inlet aim at successively described light source (1).
8. according to claim 7 day blind ultraviolet filter band ends depth test device outward, it is characterized in that, described precision displacement platform (8) is automatically controlled displacement platform with described camera bellows guide rail (9).
9. the method that day blind ultraviolet filter band according to claim 7 ends depth test device outward, is characterized in that, the method is realized by following steps:
Step 1, the light inlet of closing camera bellows (2), make trap detector (5) upper unglazed shine into into, measure the output electrical signals of described trap detector (5) as dark current noise, by described trap detector (5) zeroing, described dark current noise is compensated; Open the light inlet of camera bellows (2), adjust the light inlet that trap detector (5) is aimed at camera bellows (2), described trap detector (5) is surveyed the output photoelectric stream I of described light source (1)
0(λ);
Step 2, the light inlet of closing described camera bellows (2), make day blind ultraviolet imaging enhancer to be measured (6) upper unglazed shine into into, by described electrometer (11), measured the output electrical signals of image intensifier to be measured (6), be dark current noise, the dark current noise of acquisition be set as to the reference value of electrometer (11);
Step 3, open the light inlet of camera bellows (2), adjustment precision displacement platform (8) makes described day blind ultraviolet imaging enhancer to be measured aim at the light inlet of described camera bellows (2), by described electrometer (11) measurement light source (1) by described to be measured day blind ultraviolet imaging enhancer (6) output current signal I
t(λ);
Step 4, the electric signal obtaining according to step 1 and step 3, calculate day outer relative spectral response of a blind ultraviolet imaging enhancer (6) band:
in formula, σ
0relative spectral response for trap detector.
10. the method that day blind ultraviolet filter band according to claim 9 ends depth test device outward, it is characterized in that, by controlling camera bellows guide rail (9), make the light inlet of camera bellows (2) aim at successively the light source (1) of different spectrum, repeating step one is to step 4, and the blind ultraviolet imaging enhancer of day (6) under the different spectrum of measurement light source (1) is with outer relative spectral response.
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