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Coaxial laser radar optical system and laser radar

A laser radar and optical system technology, applied in radio wave measurement systems, electromagnetic wave re-radiation, and utilization of re-radiation, etc., can solve problems such as unsatisfactory effects, and achieve the effect of improving the beam distribution ratio and increasing the gain.

Active Publication Date: 2021-12-03
WHST CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the embodiment of the present invention provides a coaxial laser radar optical system and laser radar to solve the problem in the prior art that the gain of the coaxial structure laser radar is increased by increasing the aperture of the receiving lens, and the effect is not ideal.

Method used

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  • Coaxial laser radar optical system and laser radar
  • Coaxial laser radar optical system and laser radar
  • Coaxial laser radar optical system and laser radar

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Embodiment Construction

[0031] In the following description, specific details such as specific system structures and technologies are presented for the purpose of illustration rather than limitation, so as to thoroughly understand the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the invention may be practiced in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

[0032] In order to illustrate the technical solutions of the present invention, specific examples are used below to illustrate.

[0033] As a precision sensing system, lidar has excellent performance such as high ranging accuracy, high angular resolution, and high repetition rate, and is widely used in the fields of intelligent robots, automatic tractors, intelligent / assisted driving, and security...

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Abstract

The invention is suitable for the technical field of laser radars, and provides a coaxial laser radar optical system and a laser radar, and the optical system comprises a laser transmitting device, a reflecting mirror, an axicon and a laser receiving device. The reflecting mirror is provided with a middle hole; the axicon and the laser receiving device are coaxial; a laser beam emitted by the laser emitting device is reflected by a target object to form an echo beam, and the echo beam is reflected by the reflector to form an incident beam parallel to the optical axis of the axicon; an incident light beam enters the axicon from the conical surface of the axicon, is reflected by the bottom surface of the axicon, and is emitted from the conical surface of the axicon to form an emergent light beam parallel to the optical axis of the axicon; and the emergent light beam passes through the middle hole of the reflecting mirror and enters the laser receiving device. By adopting the axicon, the laser beams are more intensively distributed in the center of the optical axis of the laser receiving device, the distribution proportion of the beams in a paraxial region is improved, and the gain of the laser radar is improved.

Description

technical field [0001] The invention belongs to the technical field of laser radar, and in particular relates to a coaxial laser radar optical system and laser radar. Background technique [0002] As a precision sensing system, lidar has excellent performances such as high ranging accuracy, high angular resolution, and high repetition rate. It is widely used in the fields of intelligent robots, automatic tractors, intelligent / assisted driving, and security. There are mainly two schemes for the receiving and receiving optical path of lidar: parallel axis and coaxial. For the lidar with coaxial structure, a receiving lens with a middle hole and a transmitting module placed in the hole are usually used to improve the efficiency of sending and receiving. [0003] In the prior art, the gain of the coaxial laser radar is generally increased by increasing the aperture of the receiving lens. However, increasing the aperture of the receiving lens will also affect the aberration of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/481G01S17/02G01S7/48
CPCG01S7/4811G01S7/4817G01S17/02G01S7/4802Y02A90/10
Inventor 林建东罗先萍任玉松秦屹
Owner WHST CO LTD
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