A Design Method of Reflective Digital Imaging System

Abstract

The invention relates to a design method of a reflecting type digital imaging system. The design method comprises the implementing steps as follows: optical aberration of the reflecting type digital imaging system includes defocus, distortion, astigmatism, coma, field curvature and spherical aberration. According to the method, optical design and digital processing are combined for optimizing and correcting the aberration, aberration which is difficult to compensate through digital processing is corrected by the optical design, and aberration which is easy to compensate through digital processing is corrected with an image processing algorithm. An optical imaging system and a digital processing system are combined through system integrated design indexes, design parameters of the digital imaging system are restrained through an imaging target priori model, feedback iterative type optimizing design is formed, and complexity of the reflecting type digital imaging system is reduced.

Description

technical field [0001] The invention relates to a design method of a reflective digital imaging system. Background technique [0002] With the rapid development of electronic technology and material technology, the reflective imaging system has been developed from silver halide film imaging to digital imaging, and is widely used because of its advantages of long focal length, large aperture, and non-selective wavelength. It is used in meteorological observation, resource investigation, environmental monitoring, ocean remote sensing, space photogrammetry, reconnaissance and early warning, observation of space physical phenomena such as planets and stars, space target search and other fields, such as figure 1 As shown, the optical system of the imaging system is usually composed of a primary mirror, a secondary mirror, and a correction mirror group. Obviously, the addition of the correction mirror makes the traditional pure reflective system into a catadioptric system. The tar...

AI Technical Summary

Problems solved by technology

Optical design does not consider the needs of digital processing, and digital processing does not consider the impact of optical design indicators on algorithms, which makes optical design defects caused by optical device constraints and digital processing design defects caused by processing algorithm constraints. The digital image can only be added or enlarged, but cannot cancel each other out

[0007] In short, in the traditional design, even if the optical system and digital processing algorithm have been designed "very good", the combination of an "optimal" optical system and an "optimal" digital processing algorithm does not mean an "optimum" "excellent" digital imaging system, such a combination can only achieve the local optimum of the imaging system rather than the global optimum

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