Single-lens calculation imaging method based on phase recovery

Abstract

The invention discloses a single-lens calculation imaging method based on phase recovery. The method comprises the following steps: illuminating a lens by using parallel light without adding an imaging object, acquiring two diffraction patterns before or after focusing of the lens, and solving a pupil function of a system by using a phase recovery algorithm; solving an actual transfer function ofthe system according to the pupil function, and calculating an ideal transfer function of the system by using system focal length information; solving an aberration correction filter of the system byusing the actual transfer function and the ideal transfer function; carrying out approximate infinity imaging on an object in a system, collecting two images, and solving the complex amplitude of theclearest image by using a phase recovery algorithm, wherein one image is the clearest image which can be collected; and finally, performing aberration correction on the imaged image by using the solved aberration correction filter. The aberration of the imaging system is corrected by introducing the phase recovery algorithm, the problems that the imaging system is simple in structure and low in imaging quality when the aberration is large can be solved, and extra hardware equipment does not need to be added into the system.

Description

technical field [0001] The invention relates to the technical field of optical imaging, in particular to a single-lens computational imaging method based on phase recovery. Background technique [0002] With the continuous improvement of the level of science and technology and people's living standards, people's demand for high-quality, high-resolution images is becoming stronger and stronger. At the same time, people's demand for light and low-cost imaging equipment is also increasing, which requires the imaging system to be miniaturized and simplified. For example, the single-lens system is the simplest optical system, but the imaging quality of the single-lens system often has some problems. Defects, in order to improve the imaging quality, workers engaged in optical design need to spend a lot of time on lens material selection, structure selection and system parameter optimization, which makes the processing technology difficult and the cost of optical imaging equipment ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a single-lens computational imaging method based on phase recovery, which solves the contradiction between high imaging quality and simplification of the imaging system, and reduces the cost and complexity of aberration correction

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