Free-form surface folding type panoramic lens

Abstract

The invention discloses a free-form surface folding type panoramic lens. The panoramic lens comprises a fixed cylinder, a movable cylinder and a liquid lens, wherein the movable cylinder is connectedto one side of the fixed cylinder, and a curved surface lens is fixedly mounted on one side, far from the fixed cylinder, of the movable cylinder; a concave mirror is mounted at the upper part of thecurved surface lens, a reflecting mirror is mounted in the fixed cylinder, a light transmission hole is formed in the center of the reflecting mirror, a connecting ring is arranged on one side of thereflecting mirror, the outer side of the connecting ring is fixedly connected with the inner wall of the fixed cylinder, and the liquid lens is fixedly connected to the inner side of the connecting ring; and a protecting shell is fixedly connected to the outer side of the fixed cylinder, a liquid storage box is arranged in the protecting cover, and the fixed cylinder and the movable cylinder are connected through threads. According to the free-form surface folding type panoramic lens, the distance between the concave mirror and the reflecting mirror is adjusted through the fixed cylinder and the movable cylinder, and a rotating screw rod is matched for use, so that change of the curvature of the liquid lens can be changed, and the focus length can be adjusted; and the fixed cylinder and the movable cylinder can be separated, so that the maintenance is convenient.

Description

technical field [0001] The invention relates to the technical field of panoramic lenses, in particular to a free-form catadioptric panoramic lens. Background technique [0002] Freeform surface refers to the surface whose surface shape cannot be processed continuously and has the arbitrary characteristics of traditional processing and forming. When applied to the lens, it can improve the pixels and resolution of the edge scene. It is very suitable for panoramic shooting of the ring area, and the return type The lens is equivalent to adding a concave mirror with a hole in the center and a small concave mirror installed in the center of the lens on the basis of an ordinary lens. The light refracted through the front lens of the lens is reflected twice, so that the light path is divided into three sections. As a result, the length of the lens is about half shorter than that of a telephoto lens with the same focal length, and the entire length is only a quarter of the focal leng...

AI Technical Summary

Problems solved by technology

[0003] Chinese patent 201310257672.6 is a panoramic imaging device and method, which realizes 360-degree panoramic imaging with a large imaging surface. Using multiple image sensors for image stitching can obtain a larger imaging surface, and at the same time improve the image resolution at the edge of the field of view. The focal length of the traditional lens is generally difficult to adjust, and the parts inside the lens are inconvenient to replace and repair

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