A design method for underwater low-light color imaging based on prismatic spectroscopy

Abstract

The invention relates to a full-sea deep low-light color imaging design method based on prism spectroscopy. The method is as follows: firstly, the causes of underwater aberration are analyzed, the shape and material of the optical window are determined, and the shape and material of the optical window are determined. Tempered high borosilicate glass concentric equal-thickness domes are used to make optical windows to ensure energy utilization efficiency; according to the parameters of the optical window, the correction lens group and the imaging lens group are designed to complete the design of an underwater special optical system with a long working distance; The incident angle of the prism interface ensures its total reflection conditions at the specified interface, and the sophisticated prism beam splitting structure is used to realize real-time imaging of the three-spectrum sub-detector; combined with the aberration characteristics of the water body and the window material medium, the optical aberration correction is completed. Underwater low-light color imaging design; the method can restore the color real scene of the underwater low-light environment, and realize the optimal design of the underwater imaging system.

Description

【Technical field】 [0001] The invention relates to the technical field of photoelectric imaging systems, in particular to a design method for underwater low-light color imaging based on prism spectroscopy. 【Background technique】 [0002] The ocean covers 71% of the earth's surface. It is rich in mineral resources, rich in biological species, and has huge energy reserves. Optical imaging equipment has the characteristics of high resolution and in-situ recording, which can be used for the study of underwater ecological environment and benthic life habits. Provide comprehensive and detailed image data. [0003] The seawater attenuates the visible light band seriously, and there is no natural light in the deep sea, so only active lighting can be used. The optical system must make full use of the limited light energy of the platform, and the color reproduction and low-light performance of underwater optical imaging are the primary problems to be solved. [0004] In the prior art...

AI Technical Summary

Problems solved by technology

[0004] In the existing technology, conventional color detectors use Bayer mode to filter colors, which limits the utilization efficiency of spectral energy; and the color obtained by interpolation of each pixel is also biased, and the single-detector solution cannot take into account low-light and color performance at the same time

[0005] The low-light performance of traditional imaging equipment is achieved on the premise of sacrificing the depth of field. Although there have been solutions for prism spectroscopic and spectral segment collection in broadcast television and industrial application scenarios, there is a lack of special optical lens group design for water media. , the existing underwater imaging equipment cannot meet the requirements of high-quality low-light color applications

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