Light-emitting device, optical device, and information processing device

Patent metadata

Field	Value
Publication number	US-2022123524-A1
Application number	US-202117565641-A
Country	US
Kind code	A1
Filing date	Dec 30, 2021
Priority date	Aug 8, 2019
Publication date	Apr 21, 2022
Grant date	—

Abstract

A light-emitting device includes: a light source including plural light-emitting elements; a first optical member that is provided in a light-emitting path of the light source, the first optical member being configured to reduce intensity of light emitted from the light source and emit the light; and a second optical member that is provided on a light-emitting side of the first optical member and is configured to diffuse and irradiate light incident from the first optical member.

First claim

What is claimed is:

1 . A light-emitting device comprising:
a light source comprising a plurality of light-emitting elements; a first optical member that is provided in a light-emitting path of the light source, the first optical member being configured to reduce intensity of light emitted from the light source and emit the light; and a second optical member that is provided on a light-emitting side of the first optical member and is configured to diffuse and irradiate light incident from the first optical member.

2 . The light-emitting device according to claim 1 , wherein the first optical member is an optical member configured to refract incident light to increase a spread angle of emitted light.

3 . The light-emitting device according to claim 2 , wherein the first optical member is provided on the light-emitting elements of the light source.

4 . The light-emitting device according to claim 3 , wherein the first optical member is a microlens provided for each of the light-emitting elements of the light source.

5 . The light-emitting device according to claim 1 , wherein intensity of light passed through the first optical member satisfies a predetermined standard.

6 . The light-emitting device according to claim 2 , wherein intensity of light passed through the first optical member satisfies a predetermined standard.

7 . The light-emitting device according to claim 3 , wherein intensity of light passed through the first optical member satisfies a predetermined standard.

8 . The light-emitting device according to claim 4 , wherein intensity of light passed through the first optical member satisfies a predetermined standard.

9 . The light-emitting device according to claim 1 , wherein the light-emitting element is a vertical-cavity surface-emitting laser element.

10 . The light-emitting device according to claim 1 , wherein the plurality of light-emitting elements are connected in parallel to each other by an electrode pattern, and the electrode pattern covers a region excluding an emission port of each of the light-emitting elements in a continuous pattern.

11 . The light-emitting device according to claim 1 , wherein the second optical member is configured to change directivity of the light emitted from the first optical member and emit the light.

12 . The light-emitting device according to claim 11 , wherein the second optical member is a plate-like member having a structure configured to change the directivity of light on at least one surface of the plate-like member.

13 . The light-emitting device according to claim 1 , wherein the second optical member is a plate-like member having a plurality of convex portions and concave portions on at least one surface of the plate-like member.

14 . The light-emitting device according to claim 1 , wherein the light source emits light such that intensity of light passed through the second optical member without passing through the first optical member satisfies a predetermined standard.

15 . The light-emitting device according to claim 1 , wherein the second optical member is configured to emit light used for measuring a three-dimensional shape by a time-of-flight method.

16 . The light-emitting device according to claim 1 , wherein the light source, the first optical member, and the second optical member are mounted on a portable information processing terminal, and the light source is driven by a battery.

17 . An optical device comprising:
the light-emitting device according to claim 1 ; and a light-receiving unit configured to receive light that is emitted from a light source of the light-emitting device and reflected by a measurement target, and output a signal corresponding to a time from when the light is emitted from the light source to when the light is received by the light-receiving unit.

18 . An information processing device comprising:
the optical device according to claim 17 ; and a shape identifying unit configured to identify a three-dimensional shape of a measurement target based on light that is emitted from the light source of the light-emitting device of the optical device, reflected by the measurement target, and received by the light-receiving unit of the optical device.

19 . The information processing device according to claim 18 , further comprising:
an authentication processing unit configured to perform an authentication process related to use of the information processing device based on a result of identification performed by the shape identifying unit.

Assignees

• Fujifilm Business Innovation Corp

Inventors

• Higuchi Takafumi
• MINAMIRU Takeshi
• Inada Satoshi
• Nakamura Shigetoshi
• Ono Kenichi

Classifications

• H04N23/56

  provided with illuminating means · CPC title

• H01S5/02257 Primary

  using windows, e.g. specially adapted for back-reflecting light to a detector inside the housing · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G06V40/166

  using acquisition arrangements · CPC title

• G06V10/145

  Illumination specially adapted for pattern recognition, e.g. using gratings · CPC title