CN102419251A - Ultraviolet image intensifier resolution testing device - Google Patents
Ultraviolet image intensifier resolution testing device Download PDFInfo
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- CN102419251A CN102419251A CN2011104428202A CN201110442820A CN102419251A CN 102419251 A CN102419251 A CN 102419251A CN 2011104428202 A CN2011104428202 A CN 2011104428202A CN 201110442820 A CN201110442820 A CN 201110442820A CN 102419251 A CN102419251 A CN 102419251A
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Abstract
The invention discloses an ultraviolet image intensifier resolution testing device, which belongs to the performance testing field of photoelectric instruments. The device comprises an ultraviolet light source, a standard ultraviolet test reticle and an ultraviolet optical system. Under the irradiation of the ultraviolet light source, the standard ultraviolet test reticle can form ultraviolet test light beams containing standard reticles; after being collimated through an off-axis parabolic mirror of the ultraviolet optical system, the ultraviolet test light beams are focused on a photocathode face of a tested ultraviolet image intensifier by an imaging objective lens group in the catadioptric way. The problem about test on the resolution of the ultraviolet band image intensifier is solved; indirect technical support for improving the quality of the ultraviolet image intensifier is provided; and the device also has the advantages of no chromatic aberration, low spherical aberration, high test precision, and the like at the same time, and is convenient to use.
Description
Technical field
The invention belongs to photoelectric device or instrument performance field tests, relate generally to a kind of image intensifier performance parameter test device, relate in particular to a kind of ultraviolet imaging enhancer resolution test device.
Background technology
It is that the UV radiation image in 180nm～440nm zone carries out the photoelectron conversion, strengthens and reach the electron tube that human eye can normally be observed image detail that ultraviolet imaging enhancer is meant wavelength, it by the photon conversion with ultraviolet band become photoelectronic ultraviolet negative electrode, microchannel plate that the photoelectron image after the conversion is doubled and convert the photoelectron image after the multiplication video screen of human eye observable image to and form for reaching the driving power that above-mentioned conversion is equipped with.Since the target detection of ultraviolet band be imaged on military and paramilitary field and other high-technology field have important application prospects; The particularly target detection and the imaging of day blind ultraviolet; For the mark analysis of the in good time detection that closes on early warning, high voltage cable of guided missile, scene of a crime and astrosurveillance etc., demonstrate unique application prospect.
How science, estimate the image quality of ultraviolet imaging enhancer exactly, be the problem that pendulum must solution before manufacturer and user plane.Consider that resolution test is one of of paramount importance index in the image device image quality evaluation index; Although abroad some manufacturer listed resolving power numerical value in its product index; Through consulting reference materials, the evaluating apparatus of ultraviolet imaging enhancer image quality is that the resolution test device is not seen public reported.
Typical gleam image intensifier resolution test device commonly used adopts transmission imaging system (referring to Fig. 1); Wherein, The light that standard sources 1 is launched becomes even diffused light through frosted glass; Behind neutral colour filter 2, get into standard testing graticule 3 places; Light on the graticule 3 is imaged on the cathode plane of gleam image intensifier 5 through the image-forming objective lens 4 of optical system, finally reads the minimum distinguishable pattern of standard testing graticule from the video screen of gleam image intensifier, can confirm the resolving power of this image intensifier.Because ultraviolet imaging enhancer resolution test device test system receives the restriction of service band, the gleam image intensifier test macro can't be realized the image intensifier of ultraviolet band is tested.Therefore need to combine the characteristics of ultraviolet optics, the proving installation of designing this wave band satisfies the testing requirement to the ultraviolet imaging enhancer resolving power.
Summary of the invention
The technical matters that the present invention will solve is that a kind of ultraviolet imaging enhancer resolution test device is provided.
For solving the problems of the technologies described above, ultraviolet imaging enhancer resolution test device provided by the invention comprises the test of standard ultraviolet graticule, ultraviolet optics system and the three-dimensional mobile test frame that ultraviolet source, adopting quartz glass are made; Said ultraviolet optics system contains off-axis parabolic mirror and refraction-reflection image-forming objective lens group; Be coated with reflectance coating on the parabola of said off-axis parabolic mirror; Said refraction-reflection image-forming objective lens group is made up of quadric surface catoptron and compensating glass, and the quadric surface catoptron has central through hole, and it simultaneously is that quadric surface and curved surface coefficient are-0.052162; Another side is sphere and is coated with the internal reflection film; Compensating glass promptly is made up of compensation positive lens that separates and compensation negative lens for the two thin lenss of no focal power, and the compensation positive lens is coated with the ultraviolet anti-reflection film, and the exit facet of compensation negative lens is that plane and central area are coated with the external reflection film; During test, tested ultraviolet imaging enhancer is placed on the said three-dimensional mobile test frame, and tested ultraviolet imaging enhancer time pole-face the center overlap with the rear focus of said refraction-reflection image-forming objective lens group; Said standard ultraviolet test graticule departs from the optical axis of said ultraviolet optics system; The UV radiation that said ultraviolet source sends forms the ultraviolet test beams that contains the standard graduation after seeing through said standard ultraviolet test graticule; The ultraviolet test beams is collimated into the ultraviolet parallel beam through said off-axis parabolic mirror; The ultraviolet parallel beam is transmitted to through compensating glass on the annular quadric surface of quadric surface catoptron and assembles; This assembles ultraviolet light beam again through the reflection of the central area of said compensation negative lens exit facet, and the ultraviolet light beam after the reflection passes the central through hole of said quadric surface catoptron, and the time that finally is imaged on said tested ultraviolet imaging enhancer is on the pole-face.
In the present invention, said ultraviolet source is made up of uviol lamp, frosted glass and neutral colour filter, and the wavelength coverage of uviol lamp is 200nm～400nm, and the equal adopting quartz glass of frosted glass and neutral colour filter is made.
In the present invention, the material of said quadric surface catoptron, compensation positive lens and compensation negative lens is quartz glass.
(1) the present invention with can pass through the quartz glass of ultraviolet light special standard ultraviolet test graticule; Under the irradiation of ultraviolet source; Can form the ultraviolet test beams that contains the standard graduation; The ultraviolet test beams is through behind the off-axis parabolic mirror collimation of ultraviolet optics system, and the time that converges to tested ultraviolet imaging enhancer with the catadioptric mode by the image-forming objective lens group again is on the pole-face, thereby realized the test function of the present invention to ultraviolet band image intensifier resolving power.Therefore; Ultraviolet imaging enhancer resolution test device provided by the invention is not merely the ultraviolet imaging enhancer Performance Detection provides technical basis and measurement standard; And be enterprise's development, production ultraviolet imaging enhancer, improving the quality of products provides test, evaluation means.
(2) in the present invention; The collimator objective of ultraviolet optics system selects for use off-axis parabolic mirror, image-forming objective lens then to adopt the refraction-reflection image-forming objective lens group that is made up of quadric surface catoptron and zero focal power offset lens; The ultraviolet test beams that contains the standard graduation in the ultraviolet optics system only through the transmission of zero passage focal power offset lens; Therefore; This optical system not only can guarantee that the transmitance of ultraviolet light satisfies test request, and does not have aberration and eliminated spherical aberration to greatest extent, thereby for the present invention can realize the accurate measurement of ultraviolet imaging enhancer resolving power technical support is provided.
Description of drawings
Fig. 1 is typical gleam image intensifier resolution measurement schematic diagram.
Fig. 2 is the composition synoptic diagram of ultraviolet imaging enhancer resolution test device of the present invention.
Fig. 3 is the spectral pattern figure of medium ultraviolet light source of the present invention.
Fig. 4 is the wherein set of diagrams case of transmission-type standard ultraviolet test graticule among the present invention.
Fig. 5 is the composition synoptic diagram of medium ultraviolet optical system of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the present invention is made further detailed description.
According to shown in Figure 2, the ultraviolet imaging enhancer resolution test device that the present invention set up comprises UV source 6, the test of standard ultraviolet graticule 7, ultraviolet optics system and three-dimensional mobile test frame 8.
The substrate of standard ultraviolet test graticule 7 is for passing through the quartz glass of ultraviolet; Form four through plated film on it and differentiate the zone; Each zone contains six pattern units, and each pattern unit is formed by mutually perpendicular two groups of line images, and every group of line image contains three lines that uniformly-spaced wait width.Fig. 4 has provided the synoptic diagram of one of them pattern unit.
According to shown in Figure 5, the ultraviolet optics system contains off-axis parabolic mirror 12 and refraction-reflection image-forming objective lens group, and collimating mirror is made by K9 glass; The focal length of off-axis parabolic mirror 12 is 650mm,, is coated with metallic aluminium (Al) reflectance coating and reflectivity on the parabola and reaches more than 97% for 60mm from the axle amount.The diameter that quadric surface catoptron 9 has central through hole and central through hole is 18mm, and the one side of quadric surface catoptron 9 is that quadric surface and curved surface coefficient are-0.052162, and another side is sphere and is coated with metal A l internal reflection film and reflectivity reaches 97%.Compensating glass 10 promptly is made up of compensation positive lens that separates and compensation negative lens for the two thin lenss of no focal power; The compensation positive lens is positioned at the incident end; The compensation negative lens is positioned at exit end; The compensation positive lens is coated with the ultraviolet anti-reflection film, and the exit facet of compensation negative lens is the plane and is coated with metal A l external reflection film in Φ 40.3mm central area and reflectivity reaches more than 97%.The material of quadric surface catoptron 9, compensation positive lens and compensation negative lens is quartz glass and leaves.The focal length of refraction-reflection image-forming objective lens group is 147.6mm, incident bore 60mm, exit portal diameter 18mm, relative aperture 1/2.5,4 ° of field angle.The main structure parameters of ultraviolet optics system is referring to table 1.
The mm of structural parameters unit of table 1 ultraviolet optics system
Again referring to Fig. 2; During use; Ultraviolet imaging enhancer resolution test device is placed on the optic test platform 11; Tested ultraviolet imaging enhancer is placed on the three-dimensional mobile test frame 8, through regulate three-dimensional mobile test frame 8 make tested ultraviolet imaging enhancer time pole-face the center overlap with the rear focus of refraction-reflection image-forming objective lens group; Standard ultraviolet test graticule 7 is 60mm apart from what equal off-axis parabolic mirror 12 from the axle amount with the optical axis deviation of ultraviolet optics system, and the target surface of standard ultraviolet test graticule 7 is centered close to the along of off-axis parabolic mirror 12.When opening uviol lamp; Its UV radiation that sends forms a uniform ultraviolet hot spot on frosted glass; The ultraviolet hot spot sees through standard ultraviolet test graticule 7 backs and forms the ultraviolet test beams that contains the standard graduation behind the neutral colour filter dim light; The ultraviolet test beams is collimated into the ultraviolet parallel beam through said off-axis parabolic mirror 12; The ultraviolet parallel beam is transmitted to through compensating glass 10 on the annular quadric surface of quadric surface catoptron 9 and assembles, and this assembles ultraviolet light beam again through the central area reflection of compensation negative lens exit facet, and the ultraviolet light beam after the reflection passes the central through hole of quadric surface catoptron 9; The time that finally is imaged on tested ultraviolet imaging enhancer,, the tester can obtain the resolving power of tested ultraviolet imaging enhancer through the readability of observing graduation picture on the time face on the pole-face.
Claims (6)
1. ultraviolet imaging enhancer proving installation; Comprise ultraviolet source (6), ultraviolet optics system and three-dimensional mobile test frame (8); It is characterized in that: also comprise the standard ultraviolet test graticule (7) that adopting quartz glass is made; Said ultraviolet optics system contains off-axis parabolic mirror (12) and refraction-reflection image-forming objective lens group, is coated with reflectance coating on the parabola of said off-axis parabolic mirror (12), and said refraction-reflection image-forming objective lens group is made up of quadric surface catoptron (9) and compensating glass (10); Quadric surface catoptron (9) has central through hole; It simultaneously is that quadric surface and curved surface coefficient are-0.052162, and another side is sphere and is coated with the internal reflection film that compensating glass (10) promptly is made up of compensation positive lens that separates and compensation negative lens for the two thin lenss of no focal power; The compensation positive lens is coated with the ultraviolet anti-reflection film, and the exit facet of compensation negative lens is that plane and central area are coated with the external reflection film; During test, tested ultraviolet imaging enhancer is placed on the said three-dimensional mobile test frame (8), and tested ultraviolet imaging enhancer time pole-face the center overlap with the rear focus of said refraction-reflection image-forming objective lens group; Said standard ultraviolet test graticule (7) departs from the optical axis of said ultraviolet optics system; The UV radiation that said ultraviolet source (6) sends sees through said standard ultraviolet test graticule (7) back and forms the ultraviolet test beams that contains the standard graduation; The ultraviolet test beams is collimated into the ultraviolet parallel beam through said off-axis parabolic mirror (12); The ultraviolet parallel beam is transmitted to through compensating glass (10) on the annular quadric surface of quadric surface catoptron (9) and assembles; This assembles ultraviolet light beam again through the reflection of the central area of said compensation negative lens exit facet; Ultraviolet light beam after the reflection passes the central through hole of said quadric surface catoptron (9), and the time that finally is imaged on said tested ultraviolet imaging enhancer is on the pole-face.
2. ultraviolet imaging enhancer proving installation according to claim 1; It is characterized in that: said ultraviolet source (6) is made up of uviol lamp, frosted glass and neutral colour filter; The wavelength coverage of uviol lamp is 200nm～400nm, and the equal adopting quartz glass of frosted glass and neutral colour filter is made.
3. ultraviolet imaging enhancer proving installation according to claim 1 is characterized in that: the material of said quadric surface catoptron (9), compensation positive lens and compensation negative lens is quartz glass.
4. ultraviolet imaging enhancer proving installation according to claim 1 is characterized in that: said off-axis parabolic mirror (12) is made with K9 glass, and its focal length is 650mm, is 60mm from the axle amount.
5. ultraviolet imaging enhancer proving installation according to claim 1 is characterized in that: the focal length of said refraction-reflection image-forming objective lens group is 147.6mm, and the incident bore is 60mm, and the outgoing bore is 18mm, and relative aperture is 1/2.5, and field angle is 4 °.
6. ultraviolet imaging enhancer proving installation according to claim 1 is characterized in that: said reflectance coating, internal reflection film and the external reflection film is aluminium film and reflectivity reaches more than 97%.
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| CN2011104428202A CN102419251A (en) | 2011-12-26 | 2011-12-26 | Ultraviolet image intensifier resolution testing device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778440A (en) * | 2012-08-06 | 2012-11-14 | 南京国电环保科技有限公司 | Total-reflection type optical system of flue gas concentration analyzer |
| CN104181670A (en) * | 2014-07-28 | 2014-12-03 | 中国科学院西安光学精密机械研究所 | System and method for adjusting common optical axis of off-axis optical system |
| CN104614154A (en) * | 2015-02-03 | 2015-05-13 | 南京理工大学 | Testing device for radiation luminance gain of ultraviolet image intensifier |
| CN105319052A (en) * | 2015-11-30 | 2016-02-10 | 武汉光驰科技有限公司 | Low-light-level image intensifier characteristic test system |
| CN105973570A (en) * | 2016-04-27 | 2016-09-28 | 西安应用光学研究所 | Low-light ICCD resolution measuring device and measuring method |
| CN106500967A (en) * | 2016-11-03 | 2017-03-15 | 中国科学院西安光学精密机械研究所 | Solar blind ultraviolet image intensifier spatial resolution testing device and method |
| CN106053031B (en) * | 2016-06-29 | 2019-01-04 | 南京理工大学 | A kind of gleam image intensifier single tube resolving power testing device |
| CN110346120A (en) * | 2019-08-05 | 2019-10-18 | 北方夜视技术股份有限公司 | The test macro and test method of a kind of strong optical resolution of automatic gate image intensifier and dynamic range |
| CN112378625A (en) * | 2020-11-11 | 2021-02-19 | 北方夜视技术股份有限公司 | Device and method for testing electronic image resolution in electron bombardment CMOS research |
| CN114608804A (en) * | 2020-12-09 | 2022-06-10 | 航宇救生装备有限公司 | Method for evaluating compatibility of optical environment in cabin of military goggles |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778440A (en) * | 2012-08-06 | 2012-11-14 | 南京国电环保科技有限公司 | Total-reflection type optical system of flue gas concentration analyzer |
| CN104181670A (en) * | 2014-07-28 | 2014-12-03 | 中国科学院西安光学精密机械研究所 | System and method for adjusting common optical axis of off-axis optical system |
| CN104614154A (en) * | 2015-02-03 | 2015-05-13 | 南京理工大学 | Testing device for radiation luminance gain of ultraviolet image intensifier |
| CN105319052A (en) * | 2015-11-30 | 2016-02-10 | 武汉光驰科技有限公司 | Low-light-level image intensifier characteristic test system |
| CN105973570A (en) * | 2016-04-27 | 2016-09-28 | 西安应用光学研究所 | Low-light ICCD resolution measuring device and measuring method |
| CN106053031B (en) * | 2016-06-29 | 2019-01-04 | 南京理工大学 | A kind of gleam image intensifier single tube resolving power testing device |
| CN106500967A (en) * | 2016-11-03 | 2017-03-15 | 中国科学院西安光学精密机械研究所 | Solar blind ultraviolet image intensifier spatial resolution testing device and method |
| CN106500967B (en) * | 2016-11-03 | 2019-05-31 | 中国科学院西安光学精密机械研究所 | Solar blind ultraviolet image intensifier spatial resolution testing device and method |
| CN110346120A (en) * | 2019-08-05 | 2019-10-18 | 北方夜视技术股份有限公司 | The test macro and test method of a kind of strong optical resolution of automatic gate image intensifier and dynamic range |
| CN110346120B (en) * | 2019-08-05 | 2021-03-09 | 北方夜视技术股份有限公司 | System and method for testing strong light resolution and dynamic range of automatic gate control image intensifier |
| CN112378625A (en) * | 2020-11-11 | 2021-02-19 | 北方夜视技术股份有限公司 | Device and method for testing electronic image resolution in electron bombardment CMOS research |
| CN112378625B (en) * | 2020-11-11 | 2022-09-16 | 北方夜视技术股份有限公司 | Device and method for testing electronic image resolution in electron bombardment CMOS research |
| CN114608804A (en) * | 2020-12-09 | 2022-06-10 | 航宇救生装备有限公司 | Method for evaluating compatibility of optical environment in cabin of military goggles |
| CN114608804B (en) * | 2020-12-09 | 2023-04-07 | 航宇救生装备有限公司 | Method for evaluating compatibility of optical environment in cabin of military goggles |
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