Apparatus providing a plurality of light beams

Patent metadata

Field	Value
Publication number	US-11573293-B2
Application number	US-201916542164-A
Country	US
Kind code	B2
Filing date	Aug 15, 2019
Priority date	Aug 15, 2018
Publication date	Feb 7, 2023
Grant date	Feb 7, 2023

Abstract

An apparatus comprises an array of vertical-cavity surface-emitting lasers. Each of the vertical-cavity surface-emitting lasers is configured to be a source of light. The apparatus also comprises an optical arrangement configured to receive light from a plurality of the vertical-cavity surface-emitting lasers and to output a plurality of light beams.

First claim

The invention claimed is:

1. An apparatus, comprising:
an array of vertical-cavity surface-emitting lasers, each of said vertical-cavity surface-emitting lasers being configured to be a source of light; and
an optical arrangement configured to receive light from a plurality of said vertical-cavity surface-emitting lasers and to output a plurality of output light beams, the optical arrangement including one or more collimators configured to provide one or more collimated beams by collimating the light from the plurality of said vertical-cavity surface-emitting lasers and sub-optics configured to produce the plurality of output light beams by beam shaping the one or more collimated beams.

2. The apparatus as claimed in claim 1 , wherein said sub-optics include an array of optical elements configured to produce the plurality of output light beams.

3. The apparatus as claimed in claim 1 , wherein said one or more collimators comprises a plurality of collimating lenses configured to produce plural collimated beams of the one or more collimated beams from the light received from the plurality of said vertical-cavity surface-emitting lasers.

4. The apparatus as claimed in claim 3 , wherein the plurality of said vertical-cavity surface-emitting lasers are configured to produce a plurality of input light beams and said one or more collimators comprises an array of collimating lenses respectively for each input light beam, one or more of the plurality of said vertical-cavity surface-emitting lasers being configured to provide each light beam.

5. The apparatus as claimed in claim 1 , further comprising one or more micro-lenses provided on a substrate providing said array of vertical-cavity surface-emitting lasers.

6. The apparatus as claimed in claim 1 , further comprising a plurality of lenses on said array of vertical-cavity surface-emitting lasers, one for each of said vertical-cavity surface-emitting lasers.

7. The apparatus as claimed in claim 1 , further comprising a plurality of micro-lenses provided on a substrate providing said array of vertical-cavity surface-emitting lasers, the micro-lenses being configured to provide a plurality of input light beams, wherein the one or more collimators includes a plurality of collimating lenses, one collimating lens being provided for each input light beam.

8. The apparatus as claimed in claim 1 , comprising control circuitry configured to control which of said vertical-cavity surface-emitting lasers are activated.

9. The apparatus as claimed in claim 8 , wherein said control circuitry is configured to control said array of vertical-cavity surface-emitting lasers to provide input light beams sequentially to the optical arrangement.

10. A detector, comprising;
an apparatus configured to direct output light toward an object, the apparatus including:
an array of vertical-cavity surface-emitting lasers, each of said vertical-cavity surface-emitting lasers being configured to be a source of light; and
an optical arrangement configured to receive light from a plurality of said vertical-cavity surface-emitting lasers and to output a plurality of output light beams, the optical arrangement including one or more collimators configured to provide one or more collimated beams by collimating the light from the plurality of said vertical-cavity surface-emitting lasers and sub-optics configured to produce the plurality of output light beams by beam shaping the one or more collimated beams; and

a light detector configured to detect light reflected from the object.

11. The detector as claimed in claim 10 , wherein said light detector comprises an array of single photon avalanche diodes.

12. The detector as claimed in claim 10 , further comprising a processor configured to calculate a distance between the detector and the object.

13. The detector as claimed in claim 12 , wherein the processor is configured to calculate a phase shift between the light produced by the array of vertical-cavity surface-emitting lasers and the light reflected from the object.

14. An apparatus, comprising:
an array of vertical-cavity surface-emitting lasers, each of said vertical-cavity surface-emitting lasers being configured to be a source of light; and
an optical arrangement configured to receive light from the array of vertical-cavity surface-emitting lasers and to output a plurality of output light beams, the optical arrangement including one or more collimators configured to provide one or more collimated beams by collimating the light from the plurality of said vertical-cavity surface-emitting lasers and a micro-lens array configured to produce the plurality of output light beams by beam shaping the one or more collimated beams.

15. The apparatus as claimed in claim 14 , wherein said one or more collimators comprises a plurality of collimating lenses configured to produce plural collimated beams of the one or more collimated beams from the light received from the plurality of said vertical-cavity surface-emitting lasers.

16. The apparatus as claimed in claim 15 , wherein the plurality of said vertical-cavity surface-emitting lasers are configured to produce a plurality of input light beams and said one or more collimators comprises an array of collimating lenses respectively for each input light beam, one or more of the plurality of said vertical-cavity surface-emitting lasers being configured to provide each light beam.

17. The apparatus as claimed in claim 14 , further comprising one or more micro-lenses provided on a substrate providing said array of vertical-cavity surface-emitting lasers.

18. The apparatus as claimed in claim 14 , further comprising a plurality of lenses on said array of vertical-cavity surface-emitting lasers, one for each of said vertical-cavity surface-emitting lasers.

19. The apparatus as claimed in claim 14 , comprising control circuitry configured to control which of said vertical-cavity surface-emitting lasers are activated.

20. The apparatus as claimed in claim 19 , wherein said control circuitry is configured to control said array of vertical-cavity surface-emitting lasers to provide input light beams sequentially to the optical arrangement.

Assignees

• St Microelectronics Res & Dev Ltd

Inventors

• Townsend Christopher
• Gopal Krishnan Thineshwaran
• Downing James Peter Drummond
• Channon Kevin

Classifications

• G01J1/44 Primary

  Electric circuits {(for command of an exposure part G03B7/02)} · CPC title

• G01S7/10

  Providing two-dimensional [2D] co-ordinated display of distance and direction · CPC title

• G01J2001/4466

  Avalanche · CPC title

• G02B27/30

  Collimators · CPC title

• G01S7/4817

  relating to scanning · CPC title