Multiple photonic chip lidar system architecture

Patent metadata

Field	Value
Publication number	US-2020103504-A1
Application number	US-201916582530-A
Country	US
Kind code	A1
Filing date	Sep 25, 2019
Priority date	Oct 2, 2018
Publication date	Apr 2, 2020
Grant date	—

Abstract

A vehicle, Lidar system and a method of detecting an object is disclosed. The Lidar system includes a first photonic chip, a second photonic chip, a mirror and a processor. The first photonic chip generates a first transmitted light beam, and the second photonic chip generates a second transmitted light beam. The mirror directs the first transmitted light beam over a first field of view and the second transmitted light beam over a second field of view, with an object being in at least one of the first and second fields of view. The processor determines a parameter of the object from at least one of a first reflection from the first field of view and a second reflection from the second field of view. A navigation system can be used to navigate the vehicle with respect to the object based on the parameter of the object.

First claim

What is claimed is:

1 . A method of detecting an object, comprising:
directing a first transmitted light beam from a first photonic chip over a first field of view via a mirror; directing a second transmitted light beam from a second photonic chip over a second field of view via the mirror, wherein the object is in at least one of the first field of view and the second field of view; and determining a parameter of the object from at least one of a first reflection related to the first transmitted light beam from the first field of view and a second reflection related to the second transmitted light beam from the second field of view.

2 . The method of claim 1 , further comprising.
receiving the first reflection at the first photonic chip via the mirror; and receiving the second reflection at the second photonic chip via the mirror.

3 . The method of claim 1 , further comprising oscillating the mirror to scan the first transmitted light beam across the first field of view and the second transmitted light beam across the second field of view.

4 . The method of claim 1 , further comprising rotating the mirror with respect to two axes.

5 . The method of claim 1 , wherein the first transmitted light beam is incident at the mirror at a first angle of incidence and the second transmitted light beam is incident at the mirror at a second angle of incidence.

6 . The method of claim 1 , wherein the first field of view is distinct from the second field of view.

7 . The method of claim 1 , further comprising navigating a vehicle with respect to the object based on the parameter of the object.

8 . A Lidar system, comprising:
a first photonic chip configured to generate a first transmitted light beam; a second photonic chip configured to generate a second transmitted light beam; and a mirror configured to receive the first transmitted light beam and the second transmitted light beam and to direct the first transmitted light beam over a first field of view and the second transmitted light beam over a second field of view, wherein an object is in at least one of the first field of view and the second field of view; and a processor configured to determine a parameter of the object from at least one of a first reflection related to the first transmitted light beam from the first field of view and a second reflection related to the second transmitted light beam from the second field of view.

9 . The Lidar system of claim 8 , wherein the mirror directs the first reflection to the first photonic chip and the second reflection to the second photonic chip.

10 . The Lidar system of claim 8 , wherein the mirror is configured to oscillate to scan the first transmitted light beam across the first field of view and the second transmitted light beam across the second field of view.

11 . The Lidar system of claim 8 , wherein the mirror is a component of a microelectromechanical (MEMS) scanner and is rotatable with respect to two axes.

12 . The Lidar system of claim 8 , wherein the first transmitted light beam is incident at the mirror at a first angle of incidence and the second transmitted light beam is incident at the mirror at a second angle of incidence.

13 . The Lidar system of claim 8 , wherein the first field of view is distinct from the second field of view.

14 . The Lidar system of claim 8 , further comprising a navigation system configured to navigate a vehicle with respect to the object based on the parameter of the object.

15 . A vehicle, comprising:
a Lidar system comprising:
a first photonic chip configured to generate a first transmitted light beam;
a second photonic chip configured to generate a second transmitted light beam;
a mirror configured to receive the first transmitted light beam and the second transmitted light beam and to direct the first transmitted light beam over a first field of view and the second transmitted light beam over a second field of view, wherein an object is in at least one of the first field of view and the second field of view; and
a processor configured to determine a parameter of the object from at least one of a first reflection related to the first transmitted light beam from the first field of view and a second reflection related to the second transmitted light beam from the second field of view; and
a navigation system configured to navigate the vehicle with respect to the object based on the parameter of the object.

16 . The vehicle of claim 15 , wherein the mirror directs the first reflection to the first photonic chip and the second reflection to the second photonic chip.

17 . The vehicle of claim 15 , wherein the mirror is configured to oscillate to scan the first transmitted light beam across the first field of view and the second transmitted light beam across the second field of view.

18 . The vehicle of claim 15 , wherein the mirror is a component of a microelectromechanical (MEMS) scanner and is rotatable with respect to two axes.

19 . The vehicle of claim 15 , wherein the first transmitted light beam is incident at the mirror at a first angle of incidence and the second transmitted light beam is incident at the mirror at a second angle of incidence.

20 . The vehicle of claim 15 , wherein the first field of view is distinct from the second field of view.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Talty Timothy J
• Mulqueen Michael
• Kremer Richard

Classifications

• G01S17/931

  of land vehicles · CPC title

• G01S17/42

  Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) · CPC title

• G01S17/34

  using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal · CPC title

• G01S7/491

  Details of non-pulse systems · CPC title

• G01S7/4817 Primary

  relating to scanning · CPC title