Optical module with light-receiving device and light-emitting device mounted on a base member

Patent metadata

Field	Value
Publication number	US-10345603-B2
Application number	US-201515526591-A
Country	US
Kind code	B2
Filing date	Oct 27, 2015
Priority date	Nov 13, 2014
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

An optical module includes a light-forming part and a protective member. The light-forming part includes a base member; semiconductor light-emitting devices mounted on the base member; lenses mounted on the base member and configured to convert, in terms of spot size, light emitted from the semiconductor light-emitting devices; and light-receiving devices that are mounted on the base member, that are disposed, in the emission directions of the semiconductor light-emitting devices, between the semiconductor light-emitting devices and the lenses, and that are configured to directly receive light from the semiconductor light-emitting devices.

First claim

The invention claimed is:

1. An optical module comprising:
a light-forming part configured to form light; and
a protective member that includes an output window configured to transmit light from the light-forming part and that is disposed so as to surround the light-forming part,
wherein the light-forming part includes
a base member,
a semiconductor light-emitting device mounted on the base member,
a lens mounted on the base member and configured to convert, in terms of spot size, light emitted from the semiconductor light-emitting device, and
a light-receiving device that is mounted on the base member, that is disposed, in an emission direction of the semiconductor light-emitting device, between the semiconductor light-emitting device and the lens, and that is configured to directly receive light from the semiconductor light-emitting device.

2. The optical module according to claim 1 , wherein the light-forming part includes
a plurality of the semiconductor light-emitting devices mounted on the base member,
a plurality of the lenses mounted on the base member and disposed so as to individually correspond to the plurality of semiconductor light-emitting devices,
the light-receiving device mounted on the base member and disposed so as to correspond to at least one semiconductor light-emitting device of the plurality of semiconductor light-emitting devices, and
a filter mounted on the base member and configured to multiplex light from the plurality of semiconductor light-emitting devices.

3. The optical module according to claim 2 , wherein the plurality of semiconductor light-emitting devices include a semiconductor light-emitting device configured to emit red light, a semiconductor light-emitting device configured to emit green light, and a semiconductor light-emitting device configured to emit blue light.

4. The optical module according to claim 1 , wherein the light-receiving device is disposed at a position so as to receive, of light emitted from the at least one semiconductor light-emitting device, light in a region other than a region where light is converted in terms of spot size by the lens corresponding to the at least one semiconductor light-emitting device.

5. The optical module according to claim 4 , wherein the light-receiving device is disposed at a position where light emitted from the at least one semiconductor light-emitting device is received to provide a photocurrent of 1 μA or more.

6. The optical module according to claim 1 , wherein the semiconductor light-emitting device is a laser diode.

7. The optical module according to claim 1 , wherein the light-forming part further includes an electronic cooling module disposed so as to be in contact with the base member.

Assignees

• Sumitomo Electric Industries

Inventors

• Nakanishi Hiromi

Classifications

• H01S5/02216

  Butterfly-type, i.e. with electrode pins extending horizontally from the housings · CPC title

• H01S5/0683

  by monitoring the optical output parameters · CPC title

• G02B27/0916 Primary

  Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers (coupling into light guides using intermediate optical elements G02B6/4204; details of lighting devices in general F21V) · CPC title

• G02B27/1006

  for splitting or combining different wavelengths (G02B27/1086, G02B27/141 take precedence) · CPC title

• G02B27/0905 Primary

  Dividing and/or superposing multiple light beams · CPC title