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: 2012-10-24
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Abstract
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  • Claims
  • 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 introduced below in conjunction with the drawings.

[0019] In the present invention, when adjusting the MCP voltage in the darkroom 1, the ambient illuminance conditions need to be fixed. By measuring the change of the MCP voltage value when the potentiometer is adjusted, the potentiometer knob 5 to determine the MCP voltage value is adjusted. Through the measurement of the different MCP voltages of the image tube and the experimental analysis of its influence on the image quality of the output image, the ISO12233 camera resolution test board is used to analyze the image resolution of the night vision device to obtain the image tube MCP voltage and the night vision device under a fixed illumination. Graph of resolution relationship (see figure 1 ). The following conclusions can be drawn from this graph: appropriately reducing the MCP voltage will improve the image resolution. Since the gain parameters of the image tube have been dete...

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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 equipment and non-visible light television imaging systems, and mainly relates to the application of super second-generation image tubes. In particular, it designs a way to adjust the MCP voltage of super second-generation image tubes to improve digital night vision and invisible light. The method of image quality of TV imaging system. Background technique [0002] The low-light night vision device is used at night or under extremely low illumination (10 -1 ~10 -5 Lx), a high-tech instrument that uses faint moonlight, starlight, atmospheric glow and other light to transform the image that can be clearly observed by the human eye through magnification, so as to realize the observation of the target at night. Compared with other night vision devices, low-light-level night vision devices have the advantages of small size, light weight, high reliability, and low cost. It is cu...

Claims

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Application Information

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