Underwater imaging lens

Abstract

The invention relates to an underwater imaging lens, solving the problems of limit effective imaging distance of underwater photography due to luminous energy loss and background interference caused by the adsorbing and scattering action on light by a water medium via the underwater imaging lens in the prior art. The underwater imaging lens comprises an optical system arranged in a sealing mechanism, wherein the optical system comprises a water sealing window, a front lens group, a diaphragm, a rear lens group and an image plane which are successively arranged along a light path incidence direction. According to a great quantity of real experiments, glass combinations are optimized, the focal power is reasonably distributed, 11 pieces of glass are adopted, the lanthanide-series glass material with low chromatic dispersion and high refractive index is chosen, aberrations, such as the spherical aberration, the comatic aberration, the astigmatic aberration, the field curvature, the distortion, the axial chromatic aberration and the vertical-axis chromatic aberration can be effectively corrected, and the imaging quality is improved.

Description

technical field [0001] The invention relates to the technical field of underwater optical imaging, in particular to an underwater imaging lens. Background technique [0002] Underwater imaging technology plays an extremely important role in marine development and engineering, underwater scientific research and other fields. Since the underwater imaging lens is submerged in water, the optical system used on the ground will encounter many problems when used for underwater imaging after simple waterproof sealing, such as image quality deterioration, loss of field of view, and so on. In order to solve the above problems, special underwater imaging lenses came into being. This kind of lens has been designed with comprehensive consideration of the influence of the water medium, so the aberration can be corrected to the level of high-quality ground lenses. However, the effective imaging distance of underwater photography is very limited due to the loss of light energy and backgrou...

AI Technical Summary

Problems solved by technology

[0003] The invention provides an imaging lens with a large field of view and a large relative aperture specially used for underwater imaging, which solves the problem of light energy loss and background caused by the absorption and scattering of light by the underwater imaging lens in the background technology. Interference, leading to the problem that the effective imaging distance of underwater photography is very limited,

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