Large-aperture laser radar receiving optical lens
A technology of laser radar and optical lens, which is applied in the field of optical lens, can solve the problem of not being able to work for a long time, and achieve the effect of reducing the number and improving the optical transmittance
Pending Publication Date: 2021-09-21
CASIX
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Problems solved by technology
However, such requirements, in extremely cold or extremely hot places, still cannot work for a long time
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[0037] Such as figure 1 As shown, a large-aperture laser radar receiving optical lens includes: a main lens barrel 1, a front pressure ring 2, an optical lens group and a lens fixing structure arranged in the main lens barrel 1, and a photoelectric lens placed behind the main lens barrel 1. Detector 14.
[0038] Optical lens group, including: first lens 3, second lens 4, third lens 5, bandpass filter 6, fourth lens 7, Fifth lens 8 .
[0039] The first lens 3 is a biconcave lens, the second lens 4 is a plano-convex lens, the third lens 5 is a meniscus lens, the bandpass filter 6 is a planar lens, the fourth lens 7 is a meniscus lens, and the third lens 5 is a meniscus lens. The five lenses 8 are meniscus aspherical lenses;
[0040] The lens fixing structure includes: the first spacer ring 9, the second spacer ring 10, the third spacer ring 11, the first spacer ring 10, the second spacer ring 10, the third spacer ring 11, the first spacer ring 9, the second spacer ring 10, th...
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Abstract
The invention discloses a large-aperture laser radar receiving optical lens, which comprises a main lens barrel, a front pressing ring, an optical lens group and a lens fixing structure which are arranged in the main lens barrel, and a photoelectric detector which is arranged behind the main lens barrel, wherein the optical lens group comprises a first lens, a second lens, a third lens, a band-pass optical filter, a fourth lens and a fifth lens which are sequentially arranged in the main lens barrel from left to right along the light incidence direction; and the first lens is a biconcave lens, the second lens is a plano-convex lens, the third lens is a meniscus lens, the band-pass optical filter is a planar lens, the fourth lens is a meniscus lens, and the fifth lens is a meniscus aspheric lens. According to the invention, the five lenses are shared, the large aperture of 0.75 is realized by reasonably distributing the focal power of each lens, and compared with the 0.8 aperture in the prior art, the light flux acquired by the lens can be improved, the light flux is in direct proportion to the square of the reciprocal of the F number, so that the luminous flux can be improved by 1.306 times when the aperture is improved to 0.75 from 0.8.
Description
【Technical field】 [0001] The invention belongs to the technical field of optical lenses, and in particular relates to a large-aperture lidar receiving optical lens. 【Background technique】 [0002] Lidar can form a laser radar point cloud by emitting and receiving laser beams and returning a large amount of data, which has the advantages of high angular resolution, long measurement distance, fast response speed, and high reliability. In automatic driving and intelligent detection, functions such as detection, recognition, classification, and tracking of target objects can be realized. The main structure of lidar can be divided into three parts: transmitting module, receiving module and signal processing part. At present, lidar not only plays an important role in the military, but also has more and more applications in the commercial field. Especially in the vehicle field, the 3D imaging lidar adopts the principle of pulse measurement, which enables the vehicle to measure th...
Claims
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Patent Timeline
Login to View More IPC IPC(8): G02B13/18G02B7/02G02B3/02G02B27/00G01S7/481G03B30/00
CPCG02B13/18G02B7/021G02B7/026G02B3/02G02B27/0012G01S7/4816
Inventor 陶郅李志鹏钟勋鑫詹翠莲郭俊佶
Owner CASIX