Double-concave double-reflection type omnidirectional annular view filed imaging lens

Abstract

The invention relates to the technical field of imaging lenses, and particularly relates to a double-concave double-reflection type omnidirectional imaging lens which can be used for realizing the collection and transformation of imaging light rays inside an omnidirectional annular view filed by adopting a concave reflecting mirror surface and a concave reflecting mirror surface. According to the invention, the materials of a reflecting mirror body have wide select range; high optical efficiency is ensured through a reflecting mirror plated with a reflecting film which has high optical efficiency; the concave reflecting mirror surfaces do not generate chromatic aberration in a vacuum or air medium, so that the difficulty of chromatic aberration correction of a relay lens group is reduced; the double concave reflecting mirror surfaces can be respectively selected in the shape of a spherical surface or a non-spherical surface, so that the difficulty of correction of the optical aberrations, namely spherical aberration, comatic aberration, astigmatism, and the like, of the relay lens group is reduced, and good optical image quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of imaging lenses, and in particular relates to a double-concave and double-reflection panoramic imaging lens. Background technique [0002] The optical field of view of the panoramic ring optical lens can be considered to be composed of the optical field of view in two directions, that is, in the Cartesian polar coordinate system, the optical field of view in one direction is located in the XOY plane, that is, the field of view in the azimuth direction The size is 360°, and the size of the optical field of view in the other direction is the difference of the pitch angle. The above two field of view components are represented as rings in the XOY plane, and the value of the rings depends on the lens. Such a lens can image the scene in the 360° annular field of view, so as to achieve a special imaging effect. [0003] There are many forms of panoramic ring lenses, which are divided into refraction and reflec...

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Problems solved by technology

[0005] 1. The materials of the panoramic imaging lens are all refraction materials. After the light is refracted and reflected multiple times in the lens, the optical efficiency is reduced and the light energy is seriously lost;

[0006] 2. When crystal materials are used in the panoramic imaging lens, the optimal design of optical image quality can be realized, but there is a problem that some crystal materials are easy to deliquescence;

[0007] 3. When the binary surface is used in the panoramic imaging lens, the optimal design of optical image quality can be realized, but there is a problem of complex optical technology;

[0008] 4. When the panoramic imaging lens is integrated or multi-piece, it is difficult to manufacture the optical surface;

[0009] 5. When the panoramic imaging lens is integrated or multi-piece, the assembly of the lens is difficult;

[0010] 6. When the panoramic imaging lens is integrated or multi-piece, the selection of lens materials will become complicated, and the optical path will produce large chromatic aberration in front of the relay lens group, making it more difficult for the relay lens group to correct aberrations;

[0011] 7. A panoramic camera composed of a mirror-like panoramic lens has a large optical size, which is not conducive to miniaturization

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