Light emitter, light emitting device, optical device, and information processing apparatus

Patent metadata

Field	Value
Publication number	US-11657130-B2
Application number	US-201916511095-A
Country	US
Kind code	B2
Filing date	Jul 15, 2019
Priority date	Feb 27, 2019
Publication date	May 23, 2023
Grant date	May 23, 2023

Abstract

A light emitter includes: a substrate; a driving section provided on the substrate; a light source that is provided on the substrate and is driven by the driving section; a cover section through which light emitted from the light source is transmitted and that is disposed in an optical axial direction of the light source; and a support section that is provided on a part of the substrate excluding a part between the driving section and the light source and supports the cover section.

First claim

What is claimed is:

1. A light emitter comprising:
a substrate with a surface;
a driving circuit on the surface;
a light source on the surface and driven by the driving circuit;
a cover through which light emitted from the light source is transmitted and that is in an optical axial direction of the light source; and
a support that is on a part of the surface excluding a part between the driving circuit and the light source and supports the cover.

2. The light emitter according to claim 1 , wherein
the light source includes a plurality of light emitting elements,
the cover is a diffusion plate that diffuses and transmits light emitted from the light emitting elements, and
an end portion of the cover on a side on which the support for the cover is not provided is configured to transmit light with an emission intensity of 50% or higher from the light emitting element at an end portion of the light emitting element on the side on which the support is not provided.

3. The light emitter according to claim 2 , wherein
the end portion of the cover on the side on which the support for the cover is not provided is configured to transmit light with an emission intensity of 0.1% or higher from the light emitting element at the end portion on the side on which the support is not provided.

4. The light emitter according to claim 1 , wherein
the cover covers at least a part of a surface of the driving circuit.

5. The light emitter according to claim 4 , wherein
the substrate includes a circuit on the substrate that is not covered with the cover in addition to the driving circuit.

6. The light emitter according to claim 1 , wherein
the support is a wall surrounding the light source and the driving circuit.

7. The light emitter according to claim 6 , further comprising:
second cover that extends from the wall of the support on the driving circuit side toward the light source side and is configured to block the transmission of the light.

8. The light emitter according to claim 7 , wherein the second cover and the support are formed as a single member.

9. The light emitter according to claim 1 , further comprising:
a beam on an end portion side of the cover on the driving circuit side that extends from the cover side toward the driving circuit side.

10. The light emitter according to claim 9 , wherein
the beam is in contact with a surface of the driving circuit.

11. The light emitter according to claim 9 , wherein
the beam includes a member that blocks the transmission of the light from the light source.

12. The light emitter according to claim 9 , wherein
the beam and the support are formed as a single member.

13. The light emitter according to claim 1 , wherein
the support is formed as a single member.

14. A light emitting device comprising:
the light emitter according to claim 1 ; and
a housing that accommodates the light emitter, wherein
the cover is a diffusion plate, and
the housing includes a transmission plate that transmits light generated by diffusing light from the light source in the light emitter with the diffusion plate.

15. The light emitting device according to claim 14 , wherein
a distance between the light source and the driving circuit in the light emitter is smaller than a distance between the light source and the transmission plate.

16. An optical device comprising:
the light emitter according to claim 1 ; and
a light receiving sensor that receives light that is emitted from the light source in the light emitter and reflected by a measurement target, wherein
the light receiving sensor outputs a signal that corresponds to time from emission of the light from the light source to reception of the light by the light receiving sensor.

17. An information processing apparatus comprising:
the optical device according to the claim 16 ; and
a controller that specifies a three-dimensional shape of the measurement target based on light emitted from the light source in the optical device, reflected by the measurement target, and received by the light receiving sensor in the optical device.

18. The information processing apparatus according to claim 17 , wherein the controller performs authentication processing for use of the apparatus based on a result of specifying the three-dimensional shape.

19. A light emitter comprising:
a substrate with a surface;
a driving circuit on the surface;
a light source that is on the surface and is driven by the driving circuit;
a cover through which light emitted from the light source is transmitted and that is in an optical axial direction of the light source; and
a support that is on the surface, has a part that is between the driving circuit and the light source in a direction parallel to the surface and thinner than other parts, and supports the cover.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Inada Satoshi
• Ono Kenichi
• MINAMIRU Takeshi
• Murata Michiaki
• Higuchi Takafumi

Classifications

• G01S17/894

  Three-dimensional [3D] imaging with simultaneous measurement of time-of-flight at a two-dimensional [2D] array of receiver pixels, e.g. time-of-flight cameras or flash lidar · CPC title

• H01S5/423

  having a vertical cavity · CPC title

• G01S7/4815 Primary

  using multiple transmitters · CPC title

• G06V20/64

  Three-dimensional [3D] objects · CPC title

• H01S5/0428

  for applying pulses to the laser · CPC title