IP Library › Granted Patent US 12,202,396
Granted Patent B1
US 12,202,396 · App. 18/545,311 · Granted Jan 21, 2025

Line-scan-gated imaging for LiDAR headlight

Inventor: Peter Hansson (Stockholm, SE)
Assignee: Magna Electronics, LLC
B60Q1/0023F21S41/13F21S41/37G01S17/89F21Y2115/10G01S7/4813
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Quick Facts
Patent No.
US 12,202,396
App. No.
18/545,311
Granted
Jan 21, 2025
Kind
B1
Abstract

An object detection system and method for a vehicle headlight include a visible light emitter and an object sensing subsystem having an infrared line emitter for emitting infrared detection radiation and an infrared line detector. An optical subsystem receives the visible light and directs it into an external region to illuminate the external region and receives the infrared detection radiation and directs it onto an object in the external region. The optical subsystem includes a partially reflective element optically between the infrared line emitter and the external region and optically between the object sensing subsystem and the external region. The partially reflective element is configured to pass one of the infrared detection radiation and the visible light and to reflect the other of the infrared detection radiation and the visible light, such that the object sensing subsystem senses the object in a line-scan-gated mode.

Claims (31)

1. A system, comprising:

a light emitter for emitting visible light;

an object sensing subsystem comprising an infrared line emitter for emitting infrared detection radiation and an infrared line detector; and

an optical subsystem for receiving the visible light and directing the visible light into an external region to illuminate the external region and for receiving the infrared detection radiation from the infrared line emitter and directing the infrared detection radiation onto an object in the external region, the optical subsystem comprising a partially reflective element optically between the infrared line emitter and the external region and optically between the object sensing subsystem and the external region, the partially reflective element being configured to pass one of the infrared detection radiation and the visible light and to reflect the other of the infrared detection radiation and the visible light, such that the object sensing subsystem senses the object in a line-scan-gated mode.

2. The system of claim 1 , wherein the partially reflective element comprises a dichroic mirror.

3. The system of claim 1 , wherein the partially reflective element is rotatable about a pivot axis such that the object sensing subsystem senses the object in the line-scan-gated mode.

4. The system of claim 1 , wherein the object sensing subsystem is translatable with respect to the partially reflective element such that the object sensing subsystem senses the object in the line-scan-gated mode.

5. The system of claim 1 , wherein the optical subsystem is adapted to provide relative motion between the partially reflective element and the object sensing subsystem such that the object sensing subsystem senses the object in the line-scan-gated mode.

6. The system of claim 5 , wherein the relative motion between the partially reflective element and the object sensing subsystem is effected by rotation of the partially reflective element.

7. The system of claim 5 , wherein the relative motion between the partially reflective element and the object sensing subsystem is effected by translating the object sensing subsystem.

8. The system of claim 1 , wherein the system comprises a headlight of a vehicle.

9. The system of claim 1 , wherein the object sensing subsystem comprises components of a light detection and ranging (LiDAR) system for a vehicle.

10. The system of claim 1 , wherein the light emitter comprises an array of light-emitting diodes.

11. The system of claim 1 , wherein the detection radiation is infrared light.

12. The system of claim 11 , wherein the infrared light is near infrared (NIR) light.

13. The system of claim 11 , wherein the infrared light is shortwave infrared (SWIR) light.

14. An object detection method for a vehicle headlight, comprising:

emitting visible light from a light emitter;

providing an object sensing subsystem with an infrared line emitter for emitting infrared detection radiation and a linear infrared line detector; and

with an optical subsystem, receiving the visible light and directing the visible light into an external region to illuminate the external region, receiving the infrared detection radiation from the infrared line emitter and directing the infrared detection radiation onto an object in the external region, the optical subsystem comprising a partially reflective element optically between the light emitter and the external region and optically between the object sensing subsystem and the external region, the partially reflective element being configured to pass one of the infrared detection radiation and the visible light and to reflect the other of the infrared detection radiation and the visible light, such that the object sensing subsystem senses the object in a line-scan-gated mode.

15. The method of claim 14 , wherein the partially reflective element comprises a dichroic mirror.

16. The method of claim 14 , further comprising rotating the partially reflective element about a pivot axis such that the object sensing subsystem senses the object in the line-scan-gated mode.

17. The method of claim 14 , further comprising translating the object sensing subsystem with respect to the partially reflective element such that the object sensing subsystem senses the object in the line-scan-gated mode.

18. The method of claim 14 , further comprising providing relative motion between the partially reflective element and the object sensing subsystem such that the object sensing subsystem senses the object in the line-scan-gated mode.

19. The method of claim 18 , further comprising rotating the partially reflective element to provide the relative motion between the partially reflective element and the object sensing subsystem.

20. The method of claim 18 , further comprising translating the object sensing subsystem to provide the relative motion between the partially reflective element and the object sensing subsystem.

21. The method of claim 14 , wherein the object sensing subsystem comprises components of a light detection and ranging (LiDAR) system for a vehicle.

22. The method of claim 14 , wherein the light emitter comprises an array of light-emitting diodes.

23. The method of claim 14 , wherein the detection radiation is infrared light.

24. The method of claim 23 , wherein the infrared light is near infrared (NIR) light.

25. The method of claim 23 , wherein the infrared light is shortwave infrared (SWIR) light.

Assignments (2)
CHANGE OF NAME Recorded Apr 25, 2024
From: VEONEER US, LLC
To: MAGNA ELECTRONICS, LLC
Reel/Frame 067234/0861 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 19, 2023
From: HANSSON, PETER
To: VEONEER US, LLC
Reel/Frame 065912/0117 →
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Cited By (1)
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