Modulation transfer function test method and system based on CCD camera image intensifier

A modulation transfer function and image intensifier technology, which is applied in the field of the modulation transfer function test method and system based on a CCD camera image intensifier, can solve the problems of high cost, complicated and cumbersome measurement devices, and many error sources, so as to avoid measurement errors, Improve the test speed and test accuracy, the effect of strong stability

Inactive Publication Date: 2017-12-01
NANJING UNIV OF SCI & TECH
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Problems solved by technology

In this way, there are many sources of error in the measurement, and the measurement results with high precision make the measurement device complicated and c

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  • Modulation transfer function test method and system based on CCD camera image intensifier
  • Modulation transfer function test method and system based on CCD camera image intensifier
  • Modulation transfer function test method and system based on CCD camera image intensifier

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Embodiment Construction

[0022] combine figure 1 , figure 2 , a modulation transfer function test system based on a CCD camera image intensifier. The test system includes hardware and software parts.

[0023] combine figure 1 , where the hardware module consists of target light source system, image acquisition system, CCD shifting system, industrial computer and other subsystems; where the target light source system is composed of light source, integrating sphere, aperture, and projection objective lens; the image acquisition system is mainly composed of microscope It is composed of objective lens and high-resolution phase CCD machine; the CCD shift system is mainly composed of drive controller, motor driver, and three-dimensional electric translation stage. The light source is imaged on the fluorescent screen of the intensifier after passing through the integrating sphere, the small hole, and the projection objective lens. The CCD camera collects the image on the fluorescent screen of the image i...

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Abstract

The invention provides a modulation transfer function test system based on a CCD camera image intensifier. The test system is formed by a hardware module and a software module. The hardware module comprises a target light source system, an image acquisition system, a CCD shift system, an industrial personal computer and other sub systems. The software module comprises an image acquisition module, a motor control module, an MTF calculation module, a file management module and other sub modules. The collected image information is subjected to clarity judgment, if the image is fuzzy, a CCD camera is controlled through the CCD shift system to move front and back to realize focusing, thus the collected image becomes clearest, at that time the industrial personal computer processes clear image information, the calculation of a modulation transfer function is realized by the MTF calculation module, and through the file management module, a calculated modulation transfer function value is stored. According to the system, the control process is simple, the stability is good, the image can be focused automatically, and the system can be used for the detection of the modulation transfer functions of other photoelectric systems.

Description

technical field [0001] The invention relates to a modulation transfer function testing technology, in particular to a modulation transfer function testing method and system of an image intensifier based on a CCD camera. Background technique [0002] The imaging quality of an optoelectronic system directly affects the clarity of the image that can be observed by the human eye, so it is particularly important to measure the imaging quality of an optoelectronic system. There are many indicators for evaluating the imaging quality of photoelectric systems, mainly including discrimination rate method, star point test and modulation transfer function (MTF) and so on. Since the modulation transfer function quantitatively represents a large amount of image quality information provided by the star point in the form of a function, it also includes the image quality information represented by the discrimination rate, and the modulation transfer function can be directly measured accurate...

Claims

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Application Information

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IPC IPC(8): G01M11/04G06F17/15
CPCG01M11/00G06F17/156
Inventor 钱芸生黄贤斌
Owner NANJING UNIV OF SCI & TECH
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