Unblocked adaptive varifocal optical system and calibration method thereof

Abstract

The invention discloses an unblocked adaptive varifocal optical system and a calibration method thereof. The system conducts varifocal control by deformable mirrors; a Shack-Hartmann wavefront sensor in the system is connected with an adaptive control system assembly; the adaptive control system assembly is connected with two or more deformable mirrors; target light sequentially passes through each deformable mirror to enter an imaging lens assembly; a part of converged target light enters an imaging camera through a spectroscope for imaging; another part of the converged target light is reflected by the spectroscope to enter a first collimating lens through a field stop, and collimated to parallel light to enter the Shack-Hartmann wavefront sensor; image point data is measured; and the adaptive control system assembly revolves wave aberration according to the image point data and operates a corresponding correction signal, and controls at least one deformable mirror to correct the wave aberration of the system. The system is simple in structure, convenient to adjust, and high in imaging quality.

Description

technical field [0001] The invention relates to the technical field of zoom optical systems, in particular to an unobstructed adaptive zoom optical system and a calibration method thereof. Background technique [0002] The variable focal length optical system is an optical system whose focal length can be continuously changed and the position of the image plane remains relatively stable. By moving one or more lens groups, the focal length can be continuously changed within a certain range and the position of the image plane remains unchanged. At present, the commonly used The zoom optical system is mainly a mechanical compensation zoom system, and the mechanical compensation zoom system mainly relies on the nonlinear motion of the cam to realize the continuous change of the focal length. The disadvantage of this mechanical compensation zoom system is that the machining accuracy of the cam is very large. To a certain extent, it determines the imaging quality of this zoom syst...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems of low imaging quality, poor correction of aberrations of several main focal lengths, poor environmental adaptability and difficult installation and adjustment existing in the existing mechanical compensation zoom system using mechanical cam zoom, the present invention provides a structure Simple, self-adaptive correction of aberrations, convenient installation and adjustment, high imaging quality, and small error unobstructed adaptive zoom optical system and its calibration method

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