# US 11,307,376 B2 · Optical module

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- Number: US 11,307,376 B2
- Document ID: US11307376B2
- Status: Granted
- Kind: B2
- Application number: 17/014,660
- Filed: 2020-09-08
- Published: 2020-12-24
- Granted: 2022-04-19
- Earliest claimed: 2018-04-05
- Assignees: Mitsubishi Electric Corporation
- Applicants: Mitsubishi Electric Corporation
- Inventors: Keita Mochizuki; Yoshiya Sato; Mizuki Shirao
- Web page: https://patentgrep.com/patent/US11307376B2

## CPC

- G02B 7/028: {with means for compensating for changes in temperature or for controlling the temperature; thermal stabilisation}
- G02B 7/025: {using glue}
- H04B 10/50: Transmitters
- H04B 10/60: Receivers
- H04B 10/80: Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H10F 55/00: Radiation-sensitive semiconductor devices covered by groups H10F10/00, H10F19/00 or H10F30/00 being structurally associated with electric light sources and electrically or optically coupled thereto
- G02B 6/4206: {Optical features (G02B6/4207, G02B6/421 take precedence)}
- G02B 6/4226: {Positioning means for moving the elements into alignment, e.g. alignment screws, deformation of the mount}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04B: TRANSMISSION
- H10F: INORGANIC SEMICONDUCTOR DEVICES SENSITIVE TO INFRARED RADIATION, LIGHT, ELECTROMAGNETIC RADIATION OF SHORTER WAVELENGTH OR CORPUSCULAR RADIATION

## Abstract

An optical module includes: a first lens and a second lens provided between a light emitter and a light receiver; and a base member on which the light emitter and the light receiver are placed, and each of the first lens and the second lens is fixed via an adhesive resin. A first bonding direction in which a first bonding surface of the first lens is bonded and fixed via an adhesive resin, and a second bonding direction in which a second bonding surface of the second lens is bonded and fixed via an adhesive resin are respectively perpendicular to an optical axis direction of light, and an orientation of the first bonding surface and an orientation of the second bonding surface make are different from each other.

## Claims

### Claim 1

An optical module, comprising:
a light emitter configured to emit a light;
a light receiver configured to receive the light emitted from the light emitter;
a first lens and a second lens, which are provided between the light emitter and the light receiver, and which are aligned in an optical axis direction of the light emitted from the light emitting unit; and
a base member on which the light emitter and the light receiver are placed, and each of the first lens and the second lens is fixed via a layer of adhesive resin having a predetermined thickness,
wherein the first lens has a first bonding surface, and the first bonding surface being an only portion of the first lens bonded to the base member via the layer of adhesive resin so that the first lens is fixed to the base member,
wherein the second lens has a second bonding surface, and the second bonding surface being an only portion of the second lens bonded to the base member via the layer of adhesive resin so that the second lens is fixed to the base member,
wherein a first bonding direction being a stacking direction of the first bonding surface of the first lens and the layer of adhesive resin, and a second bonding direction being a stacking direction of the second bonding surface of the second lens and the layer of adhesive resin are respectively perpendicular to the optical axis direction of the light, and
wherein an orientation of the first bonding surface and an orientation of the second bonding surface are different from each other.

### Claim 2 (depends on 1)

The optical module according to claim 1, wherein the orientation of the first bonding surface and the orientation of the second bonding surface make an angle of 180°.

### Claim 3 (depends on 1)

The optical module according to claim 1,
wherein the base member has a post provided between the first lens and the second lens.
wherein at least one of the first bonding surface of the first lens or the second bonding surface of the second lens is fixed to the post via the layer of adhesive resin, and
wherein the post has an opening that allows the light to pass through.

### Claim 4 (depends on 1)

The optical module according to claim 1,
wherein the base member has a post,
wherein at least one of the first bonding surface of the first lens or the second bonding surface of the second lens is fixed to the post via the layer of adhesive resin, and
wherein the light emitter or the light receiver is positioned with respect to the post by the layer of adhesive resin.

### Claim 5 (depends on 1)

The optical module according to claim 1, wherein the base member is a thermos-electric cooler having a temperature adjustment function.

### Claim 6 (depends on 1)

The optical module according to claim 1, wherein the base member has a heat conductivity equal to or higher than 100 W/m/K.