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Image booster for improving microlight detection property of imaging system

A technology for image intensifiers and imaging systems, applied in the field of image intensifiers and imaging system image intensifiers that can improve the low-light detection performance of imaging systems, to achieve high detection levels, reduce noise, and expand the application field

Inactive Publication Date: 2007-07-25
XIAN UNIV OF TECH
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Problems solved by technology

[0005] In order to solve the existing defects of using low temperature conditions to achieve low-light detection, the purpose of the present invention is to provide an image intensifier that improves low-light detection performance, and can obtain low-light detection with higher signal-to-noise ratio and lower illuminance at room temperature purpose, the illuminance can reach 10 -11 lx, and even higher, expanding the application field of imaging detection

Method used

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  • Image booster for improving microlight detection property of imaging system
  • Image booster for improving microlight detection property of imaging system
  • Image booster for improving microlight detection property of imaging system

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Embodiment Construction

[0023] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0024] In order to improve the low-light system detection ability, the image intensifier of the present invention is provided with a magnetic mirror between the photocathode and the electronic lens, and the magnetic mirror can adopt two structures: a micro-pass electronic bottle plate or a simple magnetic mirror plus an electronic focusing lens structure.

[0025] The structure of micro-pass electronic bottle plate can be applied to small-scale integrated imaging systems, as shown in Figure 1, Figure 2, and Figure 3. It includes three coils with equal radii and placed in parallel, which are used as the first excitation coil from the position close to the photocathode. , the electronic energy release coil 1 and the second excitation coil 10, the whole structure is positioned with the fastening ring 5, the first excitation coil 4 and the electr...

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Abstract

The image enhancer includes photo cathode, electron lens, micro-channel plate, and phosphor screen. Characters are that a magnetic mirror is nearly setup between the photo cathode and the electron lens. The magnetic mirror adopts micro-channel electronic bottle-plate structure, or simple magnetic mirror plus electron focusing lens structure. Being applied to micro light detecting and imaging system, the magnetic mirror device regulates speed of electrons escaped from photo cathode so as to reduce system noise. Moreover, focusing electrons, the magnetic mirror device plays function of electron lens, and increases time of accumulating light signal effectively. Under normal temperature, the disclosed image enhancer is capable of detecting weak image signal with lower illumination so as to reach purpose of improving detection limit of faint light imaging system.

Description

technical field [0001] The invention belongs to the technical field of photoelectric imaging, and relates to an image intensifier for an imaging system, in particular to an image intensifier capable of improving low-light detection performance of the imaging system. Background technique [0002] Low-light detection CCD (Charge Coupled Devices) has important applications in civil, aerospace, military and other aspects. At present, it has launched a detection illuminance of 10 -9 lx, a CCD camera with a resolution greater than 700TV lines and a dynamic range of 4000:1. Cooled CCD cameras sold by B&M Spectroscopy in Germany, with a sensitivity of 10 at -150°C -11 lx, dynamic range 16000:1. The detection illumination should reach 10 -11 The level of lx can only be obtained under special low temperature conditions at present. [0003] Current Shimmer (10 -6 lx) There are four types of imaging CCD structures: image-enhanced IICCD (ImageIntensified Charge Coupled Devices), ele...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J31/50G01J1/02
Inventor 唐远河独育飞刘锴屈光辉宁辉张磊李皓伟
Owner XIAN UNIV OF TECH
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