Steerable high energy beam

Patent metadata

Field	Value
Publication number	US-10241208-B2
Application number	US-201815861990-A
Country	US
Kind code	B2
Filing date	Jan 4, 2018
Priority date	Sep 20, 2016
Publication date	Mar 26, 2019
Grant date	Mar 26, 2019

Abstract

A LIDAR system is provided. The LIDAR system comprises at least one processor configured to: control at least one light source in a manner enabling light flux of light from at least one light source to vary over a scanning cycle of a field of view; receive from at least one sensor reflections signals indicative of light reflected from objects in the field of view; coordinate light flux and scanning in a manner to cause at least three sectors of the field of view to occur in a scanning cycle, a first sector having a first light flux and an associated first detection range, a second sector having a second light flux and an associated second detection range, and a third sector having third light flux and an associated a third detection range; and detect an object in the second sector.

First claim

What is claimed is:

1. A LIDAR system, comprising:
at least one processor configured to:
control at least one light source in a manner enabling light flux of light from at least one light source to vary over a scanning cycle of a field of view, wherein the light projected from the at least one light source is directed to at least one deflector to scan the field of view;
receive from at least one sensor reflections signals indicative of light reflected from objects in the field of view;
coordinate light flux and scanning in a manner to cause at least three sectors of the field of view to occur in a scanning cycle, a first sector having a first light flux and an associated first detection range, a second sector having a second light flux and an associated second detection range, and a third sector having third light flux and an associated a third detection range, and wherein the second light flux is greater than each of the first light flux and the third light flux; and
detect, based on input from the at least one sensor, an object in the second sector located at a distance beyond the first detection range and the third detection range.

2. The LIDAR system of claim 1 , wherein the at least one processor is further configured to control the at least one light deflector such that during a scanning cycle of the field of view the at least one light deflector is moved through a plurality of different instantaneous positions.

3. The LIDAR system of claim 2 , wherein the at least one processor is configured to coordinate the at least one light deflector and the at least one light source such that when the at least one light deflector is located at a particular instantaneous position, a portion of a light beam is deflected by the at least one light deflector from the at least one light source towards an object in the field of view, and reflections of the portion of the light beam from the object are deflected by the at least one light deflector toward at least one sensor.

4. The LIDAR system of claim 2 , further comprising a plurality of light sources aimed at the at least one light deflector, wherein the at least one processor is further configured to control the at least one light deflector such that when the at least one light deflector is located at a particular instantaneous position, light from the plurality of light sources is projected towards a plurality of independent regions in the field of view.

5. The LIDAR system of claim 2 , wherein, the at least one processor is further configured to control the at least one light source in a manner enabling light flux of light from at least one light source to vary over multiple scanning cycles, and to cause the second sector to move relative to the first sector and the third sector.

6. The LIDAR system of claim 5 , wherein the at least one processor is further configured to cause the second sector to move in a sweeping motion within the field of view as a vehicle in which the LIDAR system is deployed moves.

7. The LIDAR system of claim 6 , wherein the at least one processor is further configured to select a predefined sweeping pattern for the second sector based on a current driving mode of the vehicle.

8. The LIDAR system of claim 6 , wherein the at least one processor is further configured to detect an object in the second sector, beyond outer boundaries of the first sector and the third sector, and to detect the object within the second sector over multiple sweeps.

9. The LIDAR system of claim 5 , wherein the at least one processor is further configured to control the at least one light source such that each of the first light flux, the second light flux, and the third light flux has substantially a same flux value for at least two consecutive scanning cycles.

10. The LIDAR system of claim 6 , wherein the at least one processor is further configured to cause the second sector to sweep in a non-continuous manner such that in a first group of scanning cycles the second sector sweeps a first area of the field of view and in a second consecutive group of scanning cycles the second sector sweeps a second area of the field of view other than the first area.

11. The LIDAR system of claim 1 , wherein the at least one processor is further configured to control the at least one light source such that the first light flux and the third light flux are substantially equal to each other for at least two consecutive scanning cycles.

12. The LIDAR system of claim 1 , wherein the at least one processor is further configured to control the at least one light source such that the first light flux is greater than the third light flux for at least two consecutive scanning cycles.

13. The LIDAR system of claim 1 , wherein the at least one processor is further configured to coordinate light flux and scanning in a manner causing the second sector to be completely surrounded by the first and third sectors.

14. The LIDAR system of claim 13 , wherein the at least one processor is further configured to cause the second sector to sweep in multiple consecutive scanning cycles such that in each scanning cycle at least a part of the second sector is below a horizon.

15. The LIDAR system of claim 1 , wherein the second detection range extends at least 50% farther than the first and third detection ranges.

16. A method for detecting objects using LIDAR, the method comprising:
controlling at least one light source in a manner enabling light flux of light from at least one light source to vary over a scanning cycle of a field of view, wherein the light projected from the at least one light source is directed to at least one deflector to scan the field of view;
receiving from at least one sensor, reflections signals indicative of light reflected from objects in the field of view;
coordinating light flux and scanning in a manner to cause at least three sectors to occur in a scanning cycle, a first sector having a first light flux and an associated first point resolution, a second sector having a second light flux and an associated second point resolution, and a third sector having third light flux and an associated third point resolution, and wherein the second light flux is greater than each of the first light flux and the third light flux; and
detecting, based on input from the at least one sensor, an object in the second sector at a point resolution higher than the first point resolution and the third point resolution.

17. The method of claim 16 , further comprising detecting an object in the second sector using a second point resolution with an average space between each point in the second sector being less than about 50% of an average space between points in the first sector and the third sector.

18. The method of claim 16 , wherein information derivable from reflections from the second sector enables detection of objects at a higher accuracy than information derivable from reflections from the first sector and the third sector.

19. The method of claim 16 , further comprising:
coordinating light flux and scanning in a manner causing the second sector to be completely surrounded by the first and third sectors.

20. The method of claim 16 , further comprising:
controlling the at least one light source such that the first light flux and the third light flux are substantially the same and the second detection range extends at least 50% farther than the first detection range and the third detection range.

21. A non-transitory computer-readable storage medium storing instructions that, when e

Assignees

• Innoviz Tech Ltd

Inventors

• Osiroff Nir
• Steinberg Amit
• Elooz David
• Zohar Guy
• Vlaiko Julian
• Keilaf Omer David
• Buskila Oren
• Rosenzweig Oren
• Eshel Ronen

Classifications

• G01S17/04

  Systems determining the presence of a target · CPC title

• G01S17/931

  of land vehicles · CPC title

• G01S7/4817 Primary

  relating to scanning · CPC title

• G01S17/89

  for mapping or imaging · CPC title

• G01S17/10

  using transmission of interrupted, pulse-modulated waves (determination of distance by phase measurements G01S17/32) · CPC title