Multi-sheet type panoramic looking-around imaging lens

Abstract

The invention discloses a multiple panoramic imaging lens. The lens adopts the lens of the front and behind pieces with different materials, various surface types, forms the multiple panoramic imaging lens through gluing, sealing joint or split type, one face of the front lens is the first protruded outward annular refracting surface, the connection between the front and behind pieces is the combination surface, the other side of the behind lens is the first concave annular refracting surface, the center of the first front annular refracting surface has the second refracting surface, the annular rim in the first refracting surface is connected with the rim of the second refracting surface, the center of first annular refracting surface has the second refracting surface, the inside annular rim of the first refracting surface is connected with the rim of the second refracting surface. With the combination of different materials, the freedom of design for this invention is higher, correct part of the chromatic aberration during the imaging of the panoramic lens, reduce the load of successive lens for correcting the chromatic aberration, and decrease the volume of long focus panoramic optical system. Properly select the materials for forming the panoramic lens, the field of view may be enlarged.

Description

technical field [0001] The invention relates to an imaging lens, in particular to a multi-chip panoramic surround-view imaging lens. Background technique [0002] As described in patents US Patent 4,566,763,1986 and US Patent 5,473,474,1995, the panoramic lens adopts the flat cylinder projection method FCP (Flat Cylinder Perspective) to project the cylindrical field of view around the optical axis of the optical system within 360° to a two-dimensional plane. within a circular area. The panoramic lens is made of glass and other light-transmitting materials. The geometric structure of the panoramic lens and its subsequent lens group is shown in Figure 1. One side of the lens is an outwardly protruding annular first refracting surface 1, and the other side of the lens is a concave annular first The reflective surface 2 is provided with a concave second reflective surface 3 at the center of the first annular refracting surface of the lens. A second refraction surface 4 is prov...

AI Technical Summary

Problems solved by technology

[0004] Currently existing technical problems: After parallel light passes through PAL, a virtual image is formed inside or behind it

In the long focal length panoramic lens system, due to the limited ability of the panoramic lens to correct aberrations, the subsequent lens group is mainly responsible for correcting aberrations, which usually leads to the complexity of the subsequent lens group L, the system volume is too large, and the correction of chromatic aberration is difficult. Large energy loss severely limits the design and use of long focal length panoramic lenses

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