CN204594661U - Spectral response measurement device outside a kind of solar blind UV electricity negative electrode response wave band - Google Patents
Spectral response measurement device outside a kind of solar blind UV electricity negative electrode response wave band Download PDFInfo
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- CN204594661U CN204594661U CN201520216833.1U CN201520216833U CN204594661U CN 204594661 U CN204594661 U CN 204594661U CN 201520216833 U CN201520216833 U CN 201520216833U CN 204594661 U CN204594661 U CN 204594661U
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Abstract
The utility model discloses the spectral response measurement device outside a kind of solar blind UV electricity negative electrode response wave band, be mainly used in instructing by the spectral response value outside wave band the technological improvement making photocathode.Main technical schemes is: A, the lamp box one being equipped with Halogen lamp LED are connected with optical filter case by front connecting cylinder, and front connecting cylinder is built with size two light hurdles, and optical filter case is built with ultraviolet cut-off filter; B, optical filter case are connected with camera bellows, and camera bellows, built with fixture, fixture is equipped with test light hurdle, and test light places measured piece after hurdle, and the solar blind UV electricity negative electrode of measured piece, microchannel plate are connected with measurement power supply and a reometer of connecting.The utility model passes through application attestation: the wave band external spectrum response can measuring solar blind UV electricity negative electrode exactly, provide objective basis to the technology and control making photocathode, effectively improve and stabilize the performance quality of photocathode, the operation technique requirement of product belonging to meeting.
Description
Technical field
the utility model belong to a kind of day blind ultraviolet imaging enhancer and solar blind ultraviolet detector manufacture in survey
electricity testing device, specifically a kind of to the integration spectral response measurement device outside its solar blind UV electricity negative electrode response wave band.The technological improvement making photocathode is instructed by the spectral response value outside wave band.
Background technology
ultraviolet is often referred to the radiation of wavelength within the scope of 10 ~ 400nm, wherein the ultraviolet of 200-280nm wave band is due to the strong absorption of the gases such as ozone in atmospheric envelope and scattering, make major part can not arrive earth most surface, therefore at irradiance on nearest ground of the ultraviolet of 200-280nm wave band lower than 10
-13
w/m
2
, so this wave band is commonly called day blind ultraviolet band.Current use day blind ultraviolet imaging enhancer and solar blind ultraviolet detector see Fig. 1, form primarily of negative electrode quartz glass input window 1, ultraviolet light photo negative electrode 2, microchannel plate 3, video screen 4, anode optical glass output window 5 and shell 6.Be mainly used in the ultraviolet absorbing day blind ultraviolet band, and convert ultraviolet image signal to visible image signal or vision signal carries out observing and measuring.By application, make significant contribution to the military affairs of China, scientific research and civilian industry.
but we have day blind ultraviolet imaging enhancer and the complete machine instrument of solar blind ultraviolet detector often occur that resolution reduces in actual applications, objective fuzzy is unclear, just do not reach the effect of observing and detecting at all, badly influence military affairs, scientific research and completing civilian special duty.Why? trace it to its cause, because day blind ultraviolet imaging enhancer and solar blind ultraviolet detector be the core devices of complete machine instrument, and solar blind UV electricity negative electrode (hereinafter referred to as tellurium caesium photocathode) is day blind ultraviolet imaging enhancer and the critical component of solar blind ultraviolet detector, immediate cause is exactly relevant with the processing quality that solar blind UV electricity negative electrode makes.Usually according to technical requirement, response (see figure 2) within 200-320nm wavelength band of tellurium caesium photocathode, also claims spectral response in wave band.But due to technologic various reasons, it is longer that the response of long wave can extend, and just response is very low, as the wavelength to 633nm, spectral response about 10
-5
~ 10
-6
mA/W, although tellurium caesium photocathode is lower in the spectral response of visible light wave range, but run into by force compared with visible ray, as sunshine, so tellurium caesium photocathode also can produce larger photocurrent, also the picture of the sun can be seen on instrument, like this when using ultraviolet scope or ultraviolet detector daytime, sunshine will produce interference, makes objective fuzzy unclear, can illusion be caused to target that is observed and detection, sometimes just directly cause day blind ultraviolet imaging enhancer and solar blind ultraviolet detector scrap.In order to make tellurium caesium photocathode not respond sunshine and other stronger visible ray, discharging the interference of sunshine, just requiring that tellurium caesium photocathode is greater than the response of the visible ray of more than 320nm to wavelength as far as possible low, more low better.(spectral response wavelength being greater than to more than 320nm is also called the response of wave band external spectrum).
require that tellurium caesium photocathode is as far as possible low to the response of wave band external spectrum, will know often prop up day blind ultraviolet imaging enhancer and the tellurium caesium photocathode of solar blind ultraviolet detector be how many to wave band external spectrum response, judge that whether tellurium caesium photocathode is qualified, instruct us to improve the Manufacturing Techniques of tellurium caesium photocathode.Because the wave band external spectrum response of tellurium caesium photocathode is very low, when measuring lower spectral response, often need higher monochromatic incident light excitation and lower weak current meter, if the power of monochromatic incident light is stronger, the photocurrent produced is comparatively large, and current measurement can be accomplished accurately, but the power of input light is stronger, easy breaking-up day blind ultraviolet imaging enhancer and solar blind ultraviolet detector in photocathode and microchannel plate, device is scrapped.And if the monochromatic incident optical power adopted is lower, then produced photocurrent is less, more difficultly measures photocurrent values accurately, can not make the accurate evaluation of wave band external spectrum response magnitude equally to tellurium caesium photocathode.In order to improve and the performance quality of stable tellurium caesium photocathode, reduce rejection rate, reducing costs, a kind of new test mode must be sought, Measurement accuracy is carried out to the wave band external spectrum response of tellurium caesium photocathode.
Utility model content
main task of the present utility model and object lack wave band external spectrum response test mode in making according to existing tellurium caesium photocathode.Design a kind of proving installation, measure the spectral response integrated value that wavelength is greater than all wavelengths of more than 320nm, represent the size that tellurium caesium photocathode responds wave band external spectrum, thus instruct the technology and control making tellurium caesium photocathode, effectively improve and the performance quality of stable tellurium caesium photocathode, reduce rejection rate, reduce costs, the operation technique requirement of product belonging to meeting.
main technical schemes of the present utility model is: proving installation comprises Halogen lamp LED, lamp box, φ 3mm light hurdle, φ 5mm light hurdle, anti-dazzling screen, optical filter case, optical filter frame, ultraviolet cut-off filter, camera bellows, test light hurdle, measured piece, fixture, reometer, rear connecting cylinder, measure power supply, lamp power supply, front connecting cylinder, concrete structure: A, Halogen lamp LED is arranged in lamp box, lamp box is connected with optical filter case by front connecting cylinder, Halogen lamp LED is connected with lamp power supply, front connecting cylinder is built with φ 3mm light hurdle, φ 5mm light hurdle, optical filter case is built with anti-dazzling screen, optical filter frame, optical filter frame is equipped with ultraviolet cut-off filter, B, optical filter case are connected by rear connecting cylinder with camera bellows, in camera bellows, a fixture is installed, fixture mount is equipped with test light hurdle, measured piece is placed on the right side being close to fixture mount after test light hurdle, clamping is located by fixture, the tellurium caesium photocathode of measured piece, microchannel and measurement power supply are connected, and middle series connection reometer forms loop, C, in proving installation, ensure that the center of Halogen lamp LED is 582mm to the distance in measured piece tellurium caesium photocathode face.
the utility model passes through probationary certificate: reach development object completely,
, the wave band external spectrum response of tellurium caesium photocathode can be measured exactly, easy to operate, efficiency is high.
, this device be day blind ultraviolet imaging enhancer research and development and indispensable instrument in producing, in order to reduce the spectral response outside tellurium caesium photocathode wave band, need to be optimized technique, as to tellurium caesium (Cs
2
te) photocathode is in manufacturing process, the amount of Cs is on the high side, spectral response outside tellurium caesium photocathode wave band can become large, if instead the amount of Cs is on the low side, spectral response in tellurium caesium photocathode wave band will be low, affect the performance of device, so find the stoichiometric proportion of Cs and Te the best by test.
, whether the tellurium caesium photocathode produced reach the technical requirement of use, also need its wave band external spectrum response test.Therefore wave band external spectrum response has become one of tellurium caesium photocathode key technical index.Day blind ultraviolet imaging enhancer and solar blind ultraviolet detector, the complete machine instrument that they assemble, especially uses in actual applications, does not find that resolution reduces under the sun, observes the phenomenon that goal seeking is smudgy and scrap, successful raising.
, this proving installation unloaded several main parts size and change other parts, also can do the spectral effects test of other image intensifier, can a multi-purpose instrument.
Accompanying drawing explanation
below in conjunction with accompanying drawing, the utility model is described in further detail.
fig. 1, be the structural representation of day blind ultraviolet imaging enhancer, be also the structural representation of solar blind ultraviolet detector, both principle of work are identical, structure is also substantially identical, institute's difference be solar blind ultraviolet detector be day blind ultraviolet imaging enhancer below a charge-coupled device (CCD) is housed.
fig. 2 is the spectral response curve figure of solar blind UV electricity negative electrode.
fig. 3 is assembly structure schematic diagram of the present utility model.
fig. 4 is the spectral transmittance curve map that the wavelength of ultraviolet cut-off filter 14 of the present utility model is greater than more than 320nm.
Embodiment
with reference to Fig. 3, main technical schemes of the present utility model is described: the present invention by Halogen lamp LED 7, lamp box 8, φ 3mm light hurdle 9, φ 5mm light hurdle 10, anti-dazzling screen 11, optical filter case 12, optical filter frame 13, ultraviolet cut-off filter 14, camera bellows 15, test light hurdle 16, measured piece (day blind ultraviolet imaging enhancer or solar blind ultraviolet detector) 17, fixture 18, reometer 19, rear connecting cylinder 20, measure power supply 21, lamp power supply 22, front connecting cylinder 23 form.Concrete structure:
a, Halogen lamp LED 7 is arranged in lamp box 8, lamp box is connected with optical filter case 12 by front connecting cylinder 23, Halogen lamp LED 7 is connected with lamp power supply 22, front connecting cylinder 23 is built with φ 3mm light hurdle 9, φ 5mm light hurdle 10, optical filter case 12 is built with anti-dazzling screen 11, optical filter frame 13, and optical filter frame is equipped with ultraviolet cut-off filter 14;
b, optical filter case 12 are connected by rear connecting cylinder 20 with camera bellows 15, in camera bellows 15, a fixture 18 is installed, fixture mount is equipped with test light hurdle 16, measured piece 17 is placed on the right side being close to fixture mount after test light hurdle, clamping is located by fixture 18, tellurium caesium photocathode 2, the microchannel plate 3(of measured piece are shown in Fig. 1) to connect with measurement power supply 21, a middle series connection reometer 19 forms loop;
c, in proving installation, ensure that the center of Halogen lamp LED 7 is 582mm to the distance d in measured piece tellurium caesium photocathode face.
with reference to Fig. 3, described Halogen lamp LED 7, specification is 12V-50W, and the brightness when 2856K colour temperature is about 100cd, and Halogen lamp LED center is to the distance d in photocathode face when 580-600mm, and the illumination incided on photocathode face is about 300Lx; Ultraviolet cut-off filter 14, model is LP330, is of a size of 50 × 50mm, and thickness is 1mm, and the light transmission rate that wavelength is greater than more than 320nm is greater than 95%; Test light hurdle 16, diameter is 85 ~ 90% of measured photocathode effective diameter size; Measure power supply 21, model is IDP-20001SLU; Reometer ammeter (Na Anbiao) 19, model is 6485.
with reference to Fig. 3, the utility model is to the concrete operations (requirement for environmental conditions carries out in the darkroom of clean working room making electron tube) of tellurium caesium photocathode wave band external spectrum response test:
a, turn on lamp power supply 22, measure power supply 21, allow device preheating close anti-dazzling screen 11 after 15 minutes;
b, adjustment lamp source current are to 3.975A, and the bulb colour temperature that this electric current is corresponding is 2856K, light intensity I is 93cd/m
2
, reometer 19 range is adjusted to 1nA;
c, open camera bellows 15, blind for the day of φ 18mm ultraviolet imaging enhancer or solar blind ultraviolet detector measured piece 17 to be placed on fixture 18 and to clamp, connect tellurium caesium photocathode 2, microchannel plate 3(and see Fig. 1) with the loop measuring power supply 21, voltage is adjusted to 150v, open the test light hurdle 16 of φ 16mm, and calculate the area S on test light hurdle, i.e. (φ 16/2)
2
× π, covers camera bellows;
d, in optical filter case 12, push ultraviolet cut-off filter 14, open anti-dazzling screen 11, measure the photocurrent i of measured piece 17 photocathode;
e, the photocurrent i substitution following formula that will record, R=id
2
/ IS, can draw the spectral response value R outside wave band.
as for the day being numbered 0531 blind ultraviolet imaging enhancer, the cathode photo current recorded is 0.53nA, substitutes into formula R=0.53 × 582
2
/ 93 × 8
2
× π=9.61nA/lm, other is also tested being numbered the day such as 0530,0537,0542,0553 blind ultraviolet imaging enhancer wave band external spectrum response respectively, spectral response value successively outside wave band is: 8.88nA/lm, 13.04nA/lm, 10.33nA/lm, 11.41 nA/lm, repeatability is better, stable and reliable for performance.As for solar blind ultraviolet detector because structure, principle are identical with day blind ultraviolet imaging enhancer, its wave band external spectrum response test just repeats no more.
with reference to Fig. 3,4, Analysis on Key Technologies of the present utility model,
, adopt the integration being greater than all spectral responses of more than 320nm, the spectral response situation beyond tellurium caesium photocathode wave band is represented with integration size, measured integration spectral response is higher, illustrate that the spectral response cut-off characteristics beyond tellurium caesium photocathode wave band is poorer, otherwise measured integration spectral response is lower, illustrate that the spectral response cut-off characteristics beyond tellurium caesium photocathode wave band is better, although the tellurium caesium photocathode spectral response that is greater than 320nm wavelength to wavelength is very low like this, but because of measured be the spectral response integration that wavelength is greater than all wavelengths of 320nm, therefore integral light electric current is more relatively large, greatly reduce the requirement to reometer measuring accuracy in the measurements, efficiently solve photocurrent less, be difficult to a difficult problem for Measurement accuracy photocurrent,
, adopt and be only greater than 320nm with the ultraviolet cut-off filter 14 of glazed thread through wavelength, ensure that the objectivity of test wave band external spectrum response,
, in connecting cylinder 23, be provided with φ 3mm light hurdle 9, φ 5mm light hurdle 10, pull open certain distance between the two, by the size of linear quadratic control light beam, play and eliminate or reduce the parasitic light effect of light beam,
, adopt right angle rack, location circular arc block and spring composition clamping tool, make clamping simple and fast in test.
Claims (1)
1. the spectral response measurement device outside a solar blind UV electricity negative electrode response wave band, it is characterized in that: proving installation comprises Halogen lamp LED (7), lamp box (8), φ 3mm light hurdle (9), φ 5mm light hurdle (10), anti-dazzling screen (11), optical filter case (12), optical filter frame (13), ultraviolet cut-off filter (14), camera bellows (15), test light hurdle (16), measured piece (17), fixture (18), reometer (19), rear connecting cylinder (20), measures power supply (21), lamp power supply (22), front connecting cylinder (23), concrete structure:
A, Halogen lamp LED (7) is arranged in lamp box (8), lamp box is connected with optical filter case (12) by front connecting cylinder (23), Halogen lamp LED (7) is connected with lamp power supply (22), (23 built with φ 3mm light hurdle (9), φ 5mm light hurdle (10) for front connecting cylinder, optical filter case (12) is built with anti-dazzling screen (11), optical filter frame (13), and optical filter frame is equipped with ultraviolet cut-off filter (14);
B, optical filter case (12) are connected by rear connecting cylinder (20) with camera bellows (15), in camera bellows (15), a fixture (18) is installed, fixture mount is equipped with test light hurdle (16), measured piece (17) is placed on the right side being close to fixture mount after test light hurdle, clamping is located by fixture (18), tellurium caesium photocathode (2), microchannel (3) of measured piece are connected with measurement power supply (21), and middle series connection reometer (19) forms loop;
C, in proving installation, ensure that the center of Halogen lamp LED (7) is 582mm to the distance (d) in measured piece tellurium caesium photocathode face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520216833.1U CN204594661U (en) | 2015-04-13 | 2015-04-13 | Spectral response measurement device outside a kind of solar blind UV electricity negative electrode response wave band |
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|---|---|---|---|
| CN201520216833.1U CN204594661U (en) | 2015-04-13 | 2015-04-13 | Spectral response measurement device outside a kind of solar blind UV electricity negative electrode response wave band |
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|---|---|
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|---|---|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107677453A (en) * | 2017-08-25 | 2018-02-09 | 北方夜视技术股份有限公司 | Day blind ultraviolet-cameras detection sensitivity test system and method for testing |
| CN106153306B (en) * | 2015-04-13 | 2018-06-01 | 北方夜视技术股份有限公司 | A kind of spectral response measurement device outside solar blind UV electricity cathode response wave band |
-
2015
- 2015-04-13 CN CN201520216833.1U patent/CN204594661U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106153306B (en) * | 2015-04-13 | 2018-06-01 | 北方夜视技术股份有限公司 | A kind of spectral response measurement device outside solar blind UV electricity cathode response wave band |
| CN107677453A (en) * | 2017-08-25 | 2018-02-09 | 北方夜视技术股份有限公司 | Day blind ultraviolet-cameras detection sensitivity test system and method for testing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150826 Effective date of abandoning: 20180601 |