An imaging camera mtf testing device and method
A testing device and imaging technology, applied in measuring devices, testing of machines/structural components, optical instrument testing, etc., can solve the problem of disconnection between image data analysis and control, affecting test accuracy, and inability to quantify and fine-tune the inclination angle of the streak plate, etc. problems, to achieve the effect of improving test efficiency and accuracy, simplifying image transmission methods, and overcoming the subjectivity of adjustment
Active Publication Date: 2020-09-29
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology
[0009] The purpose of the present invention is to solve the problem that in the MTF test of the existing imaging camera, the inclination angle of the streak plate cannot be quantitatively and finely adjusted, and the image data analysis and control are out of touch, which affects the test accuracy. , and the imaging camera MTF testing device and method for feedback control of the stripe plate adjustment, to realize the imaging camera MTF refinement test
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[0049] Such as figure 1 As shown, an imaging camera MTF test device includes a collimator 1, a vacuum environment simulation device 2, an MTF calculation and target plate pose correction computer 6, a ground inspection computer 4, a three-dimensional adjustment frame 7, a stripe plate 8, and a rotation adjustment table 9 and an adjustable light source 10 .
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The invention relates to an imaging camera MTF test device and method. The device comprises a collimator, a three-dimensional adjusting rack, a rotary adjusting platform, an adjustable light source, astriped plate and a data control processing unit; the rotary adjusting platform is mounted on a Z axis of the three-dimensional adjusting rack, and the striped plate is mounted in the rotary adjusting platform; the adjustable light source is arranged behind the striped plate; the striped plate is located on a focal plane of the collimator; an image of the striped plate is received by a to-be-tested imaging camera after passing through the collimator; and the data control processing unit calculates an inclination angle of the image of the striped plate and then controls the rotary adjusting platform to act and adjust the inclination angle, so that the image of the striped plate is coincided with a row or column pixel of a to-be-tested imaging camera CCD, conditions required by an MTF testare met, and test precision and test efficiency are improved.
Description
technical field [0001] The invention relates to the technical field of photoelectric performance testing of cameras, in particular to a device and method for improving the MTF testing accuracy of imaging cameras. Background technique [0002] When testing the imaging performance of an imaging camera, it is necessary to evaluate its clear imaging capability. The commonly used method is to test the modulation transfer function of the imaging camera, that is, to test the MTF. [0003] The basic principle of the MTF test is to use black and white stripes to form images through a collimated light tube to simulate the shooting target when the imaging camera is actually working. The width and spacing of the black and white stripes are calculated according to the focal length of the imaging camera, the pixel size of the CCD and the focal length of the collimator, so that when the black and white stripes are imaged on the CCD of the imaging camera, the black and white stripes just co...
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IPC IPC(8): G01M11/02
CPCG01M11/0292
Inventor 昌明刘锴王争锋薛勋周艳曹昆李晶李坤胡丹丹
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI