Large-view-field small-aberration lobster eye imaging system

Abstract

The invention discloses a lobster eye imaging system with a large view field and small aberration. Each small eye of the objective lens is a tiny quadrangular frustum pyramid, and the inner wall surface of the tiny quadrangular frustum pyramid is a free-form surface. The hemispherical objective lens can be regarded as being composed of three-dimensional circular rings which are tightly attached to one another and have different radiuses, and each three-dimensional circular ring is formed by winding a plurality of tiny quadrangular frustums in a circle. The side lengths of the small quadrangular frustums close to the sphere center side are equal from the outermost quadrangular frustum pyramid to the center quadrangular frustum pyramid, and the included angles of the side surfaces of the quadrangular frustums are gradually reduced, so that the focal length of the objective lens has a certain change, and the focal length of the microchannel closer to the center is longer; therefore, the focal length of the micro-channel is changed, and the image plane of the objective lens at the position with the distance being R is a plane rather than a spherical surface, so that high-resolution, multi-spectrum and plane imaging of a target in a large view field range is realized. Therefore, the problem that the working spectrum of the system is limited by an optical material is solved, inevitable large field curvature of traditional lobster eye structure imaging is effectively eliminated, the system aberration is reduced, the image plane energy uniformity is improved, the size and weight of the system can be effectively reduced, the working capability of the system is obviously improved, and the application deployment effect is achieved.

Description

technical field [0001] The invention belongs to the technical field of detection, and in particular relates to a lobster eye imaging system with a large field of view and small aberration. Background technique [0002] In work scenarios such as target warning and post-disaster search and rescue, there is a demand for continuous improvement in the detection field of view, number of channels, and imaging resolution of the optical system. The larger the field of view that the optical system can monitor and detect, the sooner the system can find the target, and buy a lot of time for subsequent defensive measures or rescue work; the wider the working spectrum of the optical system and the higher the imaging resolution, the better the target The greater the amount of information, the more conducive to accurate classification and identification of targets, reducing the false alarm rate of the system and improving the accuracy of system identification. However, as we all know, the ...

AI Technical Summary

Problems solved by technology

However, the system has a single working spectrum, only works in the infrared band, and has no response to visible light targets, and the spherical detector is difficult to process, and the manufacturing cost is high. It is difficult to popularize and practical with the current domestic technology level.

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