光学模组、激光雷达及自移动设备
By using a combination of a single-point light source, a beam shaping unit, and a beam fractal unit in the lidar, the problems of complex structure, large size, and high power consumption of multi-line lidar are solved, achieving smaller size, lower power consumption, and more efficient scanning effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DREAM INNOVATION TECH (SUZHOU) CO LTD
- Filing Date
- 2025-07-30
- Publication Date
- 2026-07-17
AI Technical Summary
Existing multi-line lidar suffers from problems such as complex structure, large size, high power consumption, and high cost due to the superposition of multiple laser source chips, which affects the overall performance.
By employing a combination of a single-point light source, a beam shaping unit, and a beam fractal unit, the light path is collimated by the beam shaping unit and refracted by the beam fractal unit, forming multiple scanning beams with different pointing angles, thereby reducing the number of light sources and realizing multi-beam scanning.
The size and power consumption of the lidar have been reduced, lowering the cost, while improving scanning efficiency and light transmittance, thus enhancing the overall performance of the device.
Smart Images
Figure CN224518962U_ABST
Abstract
Claims
1. An optical module characterized by comprising: include: A single point light source is used to generate a beam of light; A beam shaping unit is disposed on the light-emitting side of the single point light source. The beam shaping unit is configured to collimate the light beam passing through the beam shaping unit to form a collimated beam. A beam fractal unit is disposed on the light-emitting side of a beam shaping unit. The beam fractal unit includes a 0° field-of-view refraction surface and at least one non-0° field-of-view refraction surface. The tilt angles ω of the 0° field-of-view refraction surface and the non-0° field-of-view refraction surface are different. The 0° field-of-view refraction surface and the non-0° field-of-view refraction surface are configured to refract the collimated beam passing through the beam shaping unit to form multiple scanning beams with different pointing angles.
2. The optical module according to claim 1, wherein The tilt angle ω satisfies the following formula: Where n is the refractive index of the beam fractal unit, and θ is the pointing angle of the scanning beam.
3. The optical module according to claim 2, wherein An angle α is formed between the 0° field-of-view refraction surface and the non-0° field-of-view refraction surface adjacent to the non-0° field-of-view refraction surface, and the tilt angle ω of the non-0° field-of-view refraction surface adjacent to the 0° field-of-view refraction surface is complementary to the included angle α.
4. The optical module according to claim 1, wherein The beam fractal unit further includes a beam shaping section and a beam fractal section. The beam shaping section is disposed on the light-emitting side of the beam shaping unit, and the 0° field-of-view refractive surface and at least one non-0° field-of-view refractive surface are disposed on the light-emitting side of the beam fractal section.
5. The optical module according to claim 4, wherein Along the optical axis of the optical module, the projected area of the beam shaping part covers the projected area of the beam shaping unit.
6. The optical module according to claim 4, wherein The beam shaping section, the beam fractal section, the 0° field-of-view refraction surface, and the non-0° field-of-view refraction surface are an integral structure.
7. The optical module of claim 1, wherein The beam shaping unit and the beam fractal unit are an integral structure.
8. The optical module of claim 1, wherein The single-point light source is an edge-emitting laser chip or a vertical-cavity surface laser chip.
9. A lidar, comprising: Includes the optical module as described in any one of claims 1-8.
10. A self-moving device, characterized by It includes a device body and a lidar as described in claim 9, wherein the lidar is disposed on the device body.