Detection Method of External Field Wavefront Aberration in Large Aperture Space Optical System

Abstract

The invention discloses a measuring method of an outfield wave front aberration of a large-aperture space optical system, and belongs to the technical field of advanced optical system manufacturing. The measuring method aims at solving the problem that the existing detection means cannot meet a measuring requirement of the outfield wave front aberration of the large-aperture space optical system. The measuring method comprises the steps that 1, a measuring condition is initialized, a four-dimensional adjustment rack and a small-aperture parallel light generator are placed in appropriate positions at the front of a to-be-measured optical system, the small-aperture parallel light generator is turned to a specified viewing field by auxiliary equipment, x-direction and y-direction rotating devices are locked dead, an optical parameter of the to-be-measured optical system, an aperture of small-aperture parallel light and the number of subapertures required by measuring are input to a control computer, and the control computer generates an initial position and a motion locus of the small-aperture parallel light generator according to an initial parameter; 2, a wave front slope is measured; and 3, the wave front aberration is fit. A wave surface slop can be measured point by point in a time-sharing manner, and a large-aperture parallel light tube is not required, so that the difficulty of the outfield wave front aberration of the system is reduced.

Description

technical field [0001] The invention relates to a wavefront aberration detection method of an optical system, which detects the wavefront aberration of a large-aperture space system based on the Hartmann principle, solves the problem of retesting the wavefront aberration in the external field of such an optical system, and belongs to the technical field of advanced manufacturing of optical systems . Background technique [0002] The space optical system is the core of all kinds of long-distance observation and earth remote sensing equipment, and its quality is the decisive factor for the imaging capability and observation level of the equipment. With the rapid growth of demand and the continuous advancement of related technologies, the aperture and focal length of such optical systems continue to increase, and the difficulty of imaging quality inspection of the whole machine also increases accordingly. Especially when the system is out of the laboratory state and under fiel...

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Problems solved by technology

[0005] In order to solve the problem that the existing detection methods cannot meet the measurement requirements of the external field wavefront aberration of the large-aperture space optical system, the present invention proposes a simple method for measuring the external field wavefront aberration of the large-aperture space optical system by using the Hartmann measurement principle , since the wavefront slope can be measured point-by-point and time-sharing, there is no need to use a large-aperture collimator, which reduces the difficulty of the external field wavefront aberration of this type of system

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