An underwater ultra-wide-angle large-target photographic lens

Abstract

The invention provides an underwater ultra-wide-angle large target surface photographic lens. The photographic lens is mainly composed of a front lens group with negative refractive power, a rear lens group with positive refractive power, and an optical lens located between the front lens group and the rear lens group. Diaphragm composition: the front lens group is sequentially provided with a first lens with negative refractive power, a second lens with positive refractive power, a third lens with negative refractive power, and a third lens with positive refractive power from the object side to the image side. The fourth lens; the rear lens group is sequentially provided with a fifth lens with positive refractive power, a sixth lens with positive refractive power, a seventh lens with positive refractive power, and a lens with negative refractive power from the object side to the image side. The eighth lens, the ninth lens with positive refractive power, and the tenth lens with positive refractive power. The invention adopts 10 spherical lenses, has the characteristics of small aperture number, super wide angle, large target surface, compact structure and the like, and also ensures better underwater imaging quality.

Description

technical field [0001] The invention relates to an underwater ultra-wide-angle large-target photographic lens. Background technique [0002] Underwater photography technology, such as underwater robot vision and underwater TV, is the basic means of underwater detection. It plays an extremely important role in the fields of national defense, marine development and engineering, underwater archeology and so on, and has been widely valued by countries all over the world. Generally, the underwater photography objective lens is sealed and waterproof with a simple transparent parallel plate glass, which will make the viewing angle of the objective lens smaller, the magnification ratio will be reduced, and the aberration will also change, so that the imaging quality will change, resulting in image distortion and lower clarity , and the pressure is limited. Therefore, in order to overcome these difficulties, the present invention provides an ultra-wide-angle, large-target photograph...

AI Technical Summary

Problems solved by technology

[0003] The present invention improves the above-mentioned problems, that is, the technical problem to be solved by the present invention is that the underwater photographic objective lens adopts a simple transparent parallel plate glass to seal and waterproof, which will reduce the viewing angle of the objective lens, reduce the magnification, and reduce the aberration. will also change, resulting in varying image quality, distorted images, less clarity, and limited exposure to stress

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