Optical system free-form surface optimization method, device and computer storage medium

Abstract

The invention discloses a method for optimizing a free-form surface of an optical system, which includes: based on the structure of the optical system, establishing the first sensitivity matrix of the same free-form surface expression on different components, so as to obtain the component with the highest sensitivity as an additional component of the free-form surface ; Based on the different free-form surfaces in the optical system, establish the second sensitivity matrix of different free-form surfaces on the free-form surface additional components, and determine the optimized free-form surface that can be used in subsequent optimization; according to the second sensitivity matrix corresponding to the optimized free-form surface, The difference between the current image quality of the optical system and the preset target image quality is calculated to obtain the initial coefficient of the optimized free-form surface, so as to optimize the free-form surface of the optical system. The invention also discloses a free-form surface optimization device of the optical system and a readable storage medium. The invention realizes the selection of the position and shape of the free-form surface and the setting of the optimization initial value, reduces the difficulty of optimization, and improves the optimization efficiency and image quality.

Description

technical field [0001] The present invention relates to the technical field of optics, and in particular, to a method, a device and a computer storage medium for optimizing a freeform surface of an optical system. Background technique [0002] With the continuous development and progress of optical technology, optical technology has very important applications in biomedicine, chemical analysis, earth remote sensing detection, space exploration and other fields. Freeform surface refers to a non-traditional surface that cannot be represented by spherical or aspheric coefficients. It is usually non-rotationally symmetric, with flexible structure and many variables. With more degrees of freedom, the aberration of the optical system can be greatly reduced, and the volume, weight and number of lenses of the system can be reduced. [0003] In recent decades, freeform surfaces have been successfully applied in non-imaging fields, especially in lighting fields. In the field of mode...

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a free-form surface optimization method, device and computer storage medium of an optical system, aiming at solving the selection of the position and surface shape of the components attached to the free-form surface, and how to set the initial value of the optimization variable, and reduce the optimization cost. Difficulty, technical issues to improve optimization efficiency and image quality

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