Image booster for improving microlight detection property of imaging system

A technology of image intensifier and imaging system, applied in image intensifier of imaging system, image intensifier field that can improve low-light detection performance of imaging system, to achieve the effect of expanding application field, high signal-to-noise ratio, and low illumination

Inactive Publication Date: 2009-09-23
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 realize 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 x, 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 Weitong electronic bottle plate can be applied to small integrated imaging systems, such as figure 1 , figure 2 , image 3 As shown, it includes three coils with the same radius and placed in parallel, which serve as the first excitation coil 4, the electron energy release coil 1 and the second excitation coil 10 from the position close to the photocathode, and the whole structure is positioned by the fastening ring 5. An excitation coil 4 and the electronic ene...

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Abstract

The image intensifier for improving low-light detection performance of an imaging system disclosed by the invention includes a photocathode, an electronic lens, a microchannel plate and a fluorescent screen, and is characterized in that a magnetic mirror is arranged between the photocathode and the electronic lens, and the magnetic mirror can adopt a micro Through electronic bottle plate structure or simple magnetic mirror plus electronic focusing lens structure. The magnetic mirror device is applied in the low-light detection and imaging system, which regulates the speed of electrons escaped from the photocathode and reduces the system noise; plays the role of an electronic lens to focus electrons; effectively improves the accumulation time of optical signals, which can make it Weak image signals with lower illuminance are detected to achieve the purpose of improving the detection limit of the low-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 Patents(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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