Method for imaging quality degradation amount of photoelectric platform in motion by using optical transfer function

Abstract

The invention relates to a method for imaging quality degradation amount of a photoelectric platform in motion by using an optical transfer function. The method comprises the following steps of fixing the photoelectric platform on a swing table, aligning an optical axis of the photoelectric platform at a white noise random target pattern when the swing table is static, using a random target method to measure an optical transfer function value when the swing table is static, starting the swing table to enable the swing table to move along pitching and azimuth directions at certain frequency and certain swing amplitude, aligning the optical axis of the photoelectric platform at the white noise random target pattern, using the random target method to measure the optical transfer function value of the photoelectric platform subjected to servo control, comparing the optical transfer function value in a motion state and the optical transfer function value in a static state and obtaining the imaging quality degradation amount of the photoelectric platform in motion. The evaluation of imaging quality degradation of the photoelectric platform in motion is obtained by calculating the difference of the optical transfer function values in static and moving states by means of the method.

Description

technical field [0001] The invention relates to the technical field of testing the degradation of photoelectric platform motion imaging quality, in particular to a method for measuring the degradation of photoelectric platform motion imaging quality by using an optical transfer function. Background technique [0002] Under the conditions of airborne, vehicle-mounted, ship-borne, space-borne and other moving bases, the optoelectronic platform isolates most of the motion effects, but the residual jitter and vibration still damage the imaging quality of the optical system. As a result, blurring, defocusing, noise, deformation, and pixel aliasing of the optical system motion imaging will cause serious degradation. Accurately testing and evaluating the imaging quality in motion is the premise of improving the servo precision of the optoelectronic platform. There are many methods to evaluate the static imaging quality of an optical system, such as qualitative measurement methods ...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of quantitatively measuring the degradation of the imaging quality of the optical system in a moving state, the present invention provides a random target method for measuring the optical modulation transfer function of an optoelectronic platform, by calculating the difference between the optical modulation transfer function of the optoelectronic platform in a static and moving state, In order to obtain the evaluation of the photoelectric platform motion imaging quality degradation, the method of measuring the photoelectric platform motion imaging quality degradation with the optical transfer function

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