Method for adjusting image tube MCP (micro-channel plate) voltage to improve imaging quality of nigh vision viewer

A technology of imaging quality and night vision devices, applied in TV, electrical components, image communication, etc., can solve problems such as overexposure

Inactive Publication Date: 2014-07-02
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0006] The invention provides a method for adjusting the MCP voltage of the image tube to improve the imaging quality of the night vision device. Overexposure issues with fingerprints on the background

Method used

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  • Method for adjusting image tube MCP (micro-channel plate) voltage to improve imaging quality of nigh vision viewer
  • Method for adjusting image tube MCP (micro-channel plate) voltage to improve imaging quality of nigh vision viewer

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] In the present invention, when the MCP voltage is adjusted in the darkroom 1, the ambient illumination condition needs to be fixed, and the potentiometer knob 5 for adjusting the MCP voltage value is determined by measuring the change of the MCP voltage value when the potentiometer is adjusted. Through the measurement of different MCP voltages of the image tube and the experimental analysis of its influence on the imaging quality of the output image, the image resolution of the night vision device is analyzed by using the ISO12233 camera resolution test board, and the image tube MCP voltage and night vision device are obtained under a fixed illumination. A graph of the resolution relationship (see figure 1 ). The following conclusions can be drawn from the graph: the image resolution is improved by properly reducing the MCP voltage. Since the gain parameter of...

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Abstract

The invention provides a method for adjusting an image tube MCP (micro-channel plate) voltage to improve imaging quality of a night vision viewer, aiming at solving the overexposure problem when a UV near infrared digital camera shoots fingerprints on a white background. The method comprises the following steps of step 1, externally connecting two of four lead wires which are connected with an image tube and a high voltage power supply box corresponding to the MCP anode 3 and the MCP cathode 4 with lead wires, so as to perform voltage measurement; step 2, fixing illumination conditions, measuring MCP initial voltage value of the image tube in a dark room or a camera obscura 1, and recording the MCP initial voltage value; step 3, adjusting a knob of a potentiometer 5 corresponding to the high voltage power supply box, measuring the MCP voltage value after the knob is adjusted in real time, and adjusting the voltage of the image tube to a reference voltage value; and step 4, after assembling, identifying whether the camera works normally or not after the voltage is adjusted according to the overall shooting situation of the night vision viewer, if the night vision viewer shoots too slowly, the night vision viewer is judged to abnormally work, thus, the MCP lead wires are externally connected again, and the knob of the potentiometer is adjusted back along a clockwise direction.

Description

technical field [0001] The invention belongs to the field of performance improvement of digital night vision devices and non-visible light TV imaging systems. Method for image quality of television imaging system. Background technique [0002] The low-light night vision device is used at night or in extremely low light (10 -1 ~10 -5 Lx), a high-tech instrument that uses weak moonlight, starlight, atmospheric glow and other light to transform into images that can be clearly observed by human eyes after magnification, so as to realize the observation of targets at night. Compared with other night vision devices, low-light night vision devices have the advantages of small size, light weight, high reliability, and low cost, and are currently the most widely used night vision products. At present, my country's low-light night vision technology has been developed rapidly and widely used. The super-second-generation image tube is characterized by micro-channel plate (MCP), and m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N17/00
Inventor 陈聪曹峰梅崔志刚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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