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Ultraviolet imaging enhancer

An image intensifier, ultraviolet technology, applied in the field of ultraviolet detection, can solve the problems of large aberration in imaging quality, limited detection distance, low recognition ability, etc., and achieve the effect of improving image quality, long service life and high recognition ability

Inactive Publication Date: 2006-11-01
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] The purpose of the present invention is to provide an ultraviolet image intensifier, which solves the problem that in the background technology, only ultraviolet sources can be detected, but imaging is not possible, the identification ability is low, and the false alarm rate is high; or although imaging is possible, the detection distance is limited and the imaging quality is limited. There are technical problems such as large aberrations

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Embodiment Construction

[0024] The ultraviolet image intensifier is a two-dimensional image detector used to detect extremely weak ultraviolet targets. It is mainly composed of a photocathode, a microchannel plate, and a fluorescent screen. The photocathode converts incident photons into electrons. Different photocathodes can be used to realize photoelectric conversion of different wavelengths. For example, multi-alkali photocathode can detect visible light, dual-alkali cathode can respond to visible light to near ultraviolet region, and cesium iodide, cesium telluride or rubidium telluride cathode can convert 320nm The following UV radiation is converted to electron emission, with typical "sun-blind properties". The micro-channel plate is composed of millions of tiny glass tubes, and the electron gain of each micro-channel plate can reach 10 4 times. The function of the fluorescent screen is to convert the electronic image into a visible light image.

[0025] Working principle of the present inve...

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Abstract

An intensifier of ultraviolet image is prepared as setting input window at front end of shell and screen at back end of shell, forming vacuum airtight structure by sealing in input window with kovar alloy 4J50 cathode plate in utilizing low melting point glass powder, sealing photoelectric cathode and micro channel plate as well as screen in shell with excellent vacuum air tightness, coating a layer of conductive film with ultraviolet ray transmission ability and conductivity on internal surface of input window and setting photoelectric cathode on said conductive film.

Description

technical field [0001] The invention belongs to ultraviolet detection technology, in particular to an ultraviolet image intensifier. It can be used in space environment, space target detection and ultraviolet early warning. It can also be used for public security security, authenticity identification, cultural relic identification, etc. Background technique [0002] Ultraviolet early warning is an advanced missile early warning technology. Compared with pulse Doppler radar early warning, ultraviolet early warning is passive early warning and has good concealment; compared with infrared early warning, ultraviolet early warning equipment has a low false alarm rate and does not require Refrigeration, small size and light weight and other advantages. Ultraviolet early warning is to use the ultraviolet band of the "solar spectrum blind zone" to detect the flame and plume of the missile. Because it is not sensitive to sunlight and ordinary light, it can avoid the largest backgro...

Claims

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Application Information

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IPC IPC(8): G01S17/89G01S7/48
Inventor 赵宝升张宣妮邹玮曹希斌董改云王俊锋
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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