Optical Component and Laser Radar System

Patent metadata

Field	Value
Publication number	US-2022413313-A1
Application number	US-202217891293-A
Country	US
Kind code	A1
Filing date	Aug 19, 2022
Priority date	Feb 19, 2020
Publication date	Dec 29, 2022
Grant date	—

Abstract

An optical component includes a first lens and a second lens that are arranged in sequence in an emission direction of a beam and are disposed opposite relative to each other. The first lens has a first shaping surface and a second shaping surface that are disposed opposite to each other, and the second lens has a third shaping surface and a fourth shaping surface that are disposed opposite to each other. The first shaping surface and the third shaping surface form a first shaping surface group to perform optical path collimation on a first polarization direction of the beam. The second shaping surface and the fourth shaping surface form a second shaping surface group to perform optical path collimation on a second polarization direction of the beam.

First claim

1 . An optical component, comprising:
a first lens disposed in an emission path of a first beam and configured to emit second beams, and comprising:
a first shaping surface configured to diverge a first angle of divergence of the first beam in a first polarization direction of the first beam; and
a second shaping surface that is disposed opposite the first shaping surface; and
a second lens disposed opposite the first lens in a path of the second beams and comprising:
a third shaping surface configured to collimate the second beams to obtain first parallel beams in the first polarization direction; and
a fourth shaping surface that are that is disposed opposite the third shaping surface,
wherein the first shaping surface and the third shaping surface define a first shaping surface group that is configured to perform a first optical path collimation in the first polarization direction, wherein the second shaping surface and the fourth shaping surface define a second shaping surface group that is configured to perform a second optical path collimation in the second polarization direction, and wherein the second polarization direction is perpendicular to the first polarization direction.

2 . The optical component of claim 1 , wherein the first lens further comprises:
a first surface facing away from the second lens, wherein the first shaping surface is located on the first surface; and a second surface facing the second lens, wherein the second shaping surface is located on the second surface, and wherein the second lens further comprises:
a third surface facing away from the first lens, wherein the third shaping surface is located on the third surface; and
a fourth surface facing the first lens, wherein the fourth shaping surface is located on the fourth surface.

3 . The optical component of claim 2 , wherein the first shaping surface and the third shaping surface are cylinders comprising a first generatrix and a third generatrix, and wherein the first generatrix and the third generatrix are parallel to the second polarization direction.

4 . The optical component of claim 3 , wherein a first curvature of the first shaping surface and a second curvature of the third shaping surface increase as a distance between the first generatrix of the first shaping surface and the third generatrix of the third shaping surface increases.

5 . The optical component of claim 1 , wherein the second shaping surface is configured to converge second angle of divergence in the second polarization direction, and wherein the fourth shaping surface is configured to collimate the second beams to obtain second parallel beams in the second polarization direction.

6 . The optical component of claim 2 , wherein the second shaping surface is configured to converge a second angle of divergence in the second polarization direction, and wherein the fourth shaping surface is configured to collimate the second beams to obtain second parallel beams in the second polarization direction.

7 . The optical component of claim 3 , wherein the second shaping surface is configured to converge a second angle of divergence in the second polarization direction, and wherein the fourth shaping surface is configured to collimate the second beams to obtain second parallel beams in the second polarization direction.

8 . The optical component of claim 4 , wherein the second shaping surface is configured to converge a second angle of divergence in the second polarization direction, and wherein the fourth shaping surface is configured to collimate the second beams to obtain second parallel beams in the second polarization direction.

9 . The optical component of claim 5 , wherein the first lens further comprises a first surface facing the second lens, wherein the second shaping surface is located on the first surface, wherein the second lens further comprises a second surface facing the first lens, and wherein the fourth shaping surface is located on the second surface.

10 . The optical component of claim 9 , wherein the second shaping surface and the fourth shaping surface are cylinders comprising a second generatrix and a fourth generatrix, and wherein the second generatrix and the fourth generatrix are parallel to the first polarization direction.

11 . The optical component of claim 10 , wherein a first curvature of the second shaping surface and a second curvature of the fourth shaping surface increases as a distance between the second generatrix of the second shaping surface and the fourth generatrix of the fourth shaping surface increases.

12 . The optical component of claim 1 , wherein:
the second shaping surface is a first cylinder comprising a first generatrix that is parallel to the first polarization direction, the second shaping surface is configured to collimate the second beams to obtain second parallel beams in the second polarization direction, and the fourth shaping surface is a first plane; or the second shaping surface is a second plane, the fourth shaping surface is a second cylinder comprising a second generatrix that is parallel to the first polarization direction, and the fourth shaping surface is configured to collimate the second beams to obtain third parallel beams in the second polarization direction.

13 . The optical component of claim 1 , wherein the first polarization direction is a slow axis direction of the first beam, and wherein the second polarization direction is a fast axis direction of the first beam.

14 . A laser radar system comprising:
a laser comprising a first beam; and an optical component is communicatively coupled to the laser, and comprising:
a first lens disposed in an emission path of the first beam, and configured to emit second beams, and comprising:
a first shaping surface configured to diverge a first angle of divergence in a first polarization direction of the first beam; and
a second shaping surface that is disposed opposite the first shaping surface; and

a second lens disposed opposite the first lens in a path of the second beams and comprising:
a third shaping surface configured to collimate the second beams to obtain first parallel beams in the first polarization direction; and
a fourth shaping surface that is disposed opposite the third shaping surface,

wherein the first shaping surface and the third shaping surface define a first shaping surface group that is configured to perform a first optical path collimation in the first polarization direction,
wherein the second shaping surface and the fourth shaping surface define a second shaping surface group that is configured to perform a second optical path collimation in the second polarization direction, and
wherein the second polarization direction is perpendicular to the first polarization direction.

15 . The laser radar system of claim 14 , wherein the first lens further comprises:
a first surface facing away from the second lens, wherein the first shaping surface is located on the first surface; and a second surface facing the second lens, wherein the second shaping surface is located on the second surface, and wherein the second lens further comprises:
a third surface facing away from the first lens, wherein the third shaping surface is located on the third surface; and

a fourth surface facing the first lens, wherein the fourth shaping surface is located on the fourth surface.

16 . The laser radar system of claim 15 , wherein the first shaping surface and the third shaping surface are cylinders comprising a first generatrix and a third generatrix, and wherein the first generatri

Assignees

• Huawei Tech Co Ltd

Inventors

• Yan Lei
• Huang Ke
• Xiong Wei

Classifications

• G02B19/0014 Primary

  at least one surface having optical power · CPC title

• G01S7/499

  using polarisation effects · CPC title

• G01S7/4814

  of transmitters alone · CPC title

• G02B27/0966 Primary

  Cylindrical lenses (cylindrical lenses per se G02B3/06) · CPC title

• G02B19/0052

  the light source comprising a laser diode (coupling into light guides using intermediate optical elements G02B6/4204; semiconductor lasers having optical devices external to the laser cavity H01S5/005) · CPC title