Linear array CCD (Charge Coupled Device) camera bidirectional modulation transfer function testing device and method

Abstract

The invention relates to a linear array CCD (Charge Coupled Device) camera bidirectional modulation transfer function testing device and method. The linear array CCD camera bidirectional modulation transfer function testing device comprises a light source, a target board, a collimator and a high-precision angular rate rotary table, wherein a camera to be tested is arranged on the high-precision angular rate rotary table, the target board, the collimator and the camera to be tested are sequentially arranged on an emitting light path of the light source, and a target board cross stripe and a target board vertical stripe which is mutually vertical to the target board cross stripe are arranged on the target board. The linear array CCD camera bidirectional modulation transfer function testing device and method are capable of directly simultaneously measuring system transfer functions of a total-system MTF (Modulation Transfer Function) in two directions, are wide in applicable range and are convenient to operate.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a test device and method for a bidirectional modulation transfer function of an optical camera, in particular to a test device and method for a line array CCD camera bidirectional modulation transfer function. Background technique [0002] Linear array CCD is a sensor widely used in optical remote sensing. The image of the target is obtained through the relative push-broom between the camera and the target, which is an important technical solution for high-resolution optical remote sensing observation. Since the linear array detector only collects optical signals in one direction, the modulation transfer function (MTF) of the whole system of the traditional linear array CCD camera is tested by using a collimator with a stripe plate. The azimuth makes the stripes perpendicular to the line array detector, and ensures that the size of the stripes is just pressed on one pixel. The measured MTF is...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problems such as the inability to directly measure the push-broom direction modulation transfer function of the CCD camera in the laboratory and the inconvenience of obtaining the linear array direction modulation transfer function through manual fine adjustment, the present invention provides a method that can directly and simultaneously Measure the system transfer function in two directions of the MTF of the whole system, a wide application range and an easy-to-operate linear array CCD camera bidirectional modulation transfer function testing device and method

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