Wavefront coding imaging system and super-resolution processing method

Abstract

Provided are a wavefront coding imaging system and a super-resolution processing method based on single image amplification. The wavefront coding imaging system comprises a wavefront coding imaging lens, 1/3 inch image detector, and a decoding processing unit. The wavefront coding imaging lens comprises a first lens, a phase mask plate, a second lens, and a third lens. The first lens, the phase mask plate, the second lens, and the third lens, the 1/3 inch image detector, and the decoding processing unit are arranged on a same optical path in sequence. The curvature radius, X-direction light-passing semi-aperture, Y-direction light-passing semi-aperture of the front surfaces and rear surfaces of the first lens, the phase mask plate, the second lens, and the third lens are different from parameters in the prior art. The invention provides the wavefront coding imaging system which can realize super-large focal depth clear imaging on the premise of not changing hardware conditions of an image sensor, and can obtain super-resolution reconstructed images corresponding to a detector with smaller physical pixel size, and provides a super-resolution processing method based on single image amplification.

Description

technical field [0001] The invention belongs to the field of optics, and relates to a wavefront coding imaging system and a super-resolution processing method, in particular to a large focal depth imaging system using wavefront coding technology and a super-resolution image processing method for the wavefront coding imaging system. Background technique [0002] The depth of focus of extended optical systems has always been a hotspot in academic research. Since the mid-1980s, although various methods have been proposed for depth of field extension, it was not until Dr. Dowski and Professor Cathey of the University of Colorado in the United States proposed the wave After the concept of pre-coding, the depth of field extension has a real breakthrough. [0003] Taking the one-dimensional optical system as an example, its defocus optical transfer function OTF can be obtained through the autocorrelation operation of the generalized pupil function, as follows: [0004] ...

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However, the physical size of an image sensor pixel is limited by many factors such

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