# US 2019/0174654 A1 · Optical module

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- Number: US 2019/0174654 A1
- Document ID: US20190174654A1
- Status: Published application
- Kind: A1
- Application number: 16/177,846
- Filed: 2018-11-01
- Published: 2019-06-06
- Earliest claimed: 2017-11-20
- Assignees: InnoLight Technology (Suzhou) Ltd.
- Applicants: InnoLight Technology (Suzhou) LTD.
- Inventors: Chao ZHANG; Kewu WANG
- Web page: https://patentgrep.com/patent/US20190174654A1

## CPC

- H05K 7/20409: {Outer radiating structures on heat dissipating housings, e.g. fins integrated with the housing}
- G02B 6/4266: {Thermal aspects, temperature control or temperature monitoring (thermal aspect of electrical circuits H05K7/20, H05K5/0213, temperature control in general G05D23/19)}
- G02B 6/428: {containing printed circuit boards [PCB]}
- H05K 7/20145: {Means for directing air flow, e.g. ducts, deflectors, plenum or guides}
- H04B 10/40: Transceivers
- H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04B: TRANSMISSION

## Abstract

An optical module includes a housing, a PCB base board, an optical assembly, and a heat generating device. The PCB base board, the optical assembly, and the heat generating device are arranged in the housing. The heat generating device is thermally connected to the housing. A plurality of ribs are arranged outside the housing. Air flow channels are formed between the plurality of ribs and extend along a longitudinal direction of the optical module. Each one of the ribs has a first end portion, a second end portion, and a middle portion that connects the first end portion and the second end portion. A radial width of at least one of the ribs gradually increases from the first end portion of the at least one of the ribs toward the middle portion of the at least one of the ribs.

## Claims

### Claim 1

An optical module, comprising:
a housing; and
a PCB base board, an optical assembly, and a heat generating device arranged in the housing,
wherein
the heat generating device is thermally connected to the housing,
a plurality of ribs are arranged outside the housing,
air flow channels are formed between the plurality of ribs and extend along a longitudinal direction of the optical module,
each one of the ribs has a first end portion, a second end portion, and a middle portion that connects the first end portion and the second end portion, and
a radial width of at least one of the ribs gradually increases gradually from the first end portion of the at least one of the ribs toward the middle portion of the at least one of the ribs.

### Claim 2 (depends on 1)

The optical module of claim 1, wherein the radial width of the at least one of the ribs gradually decreases from the middle portion of the at least one of the ribs toward the second end portion of the at least one of the ribs.

### Claim 3 (depends on 1)

The optical module of claim 1, wherein the air flow channels formed between the plurality of ribs are narrowed where heat is concentrated.

### Claim 4 (depends on 1)

The optical module of claim 1, wherein the air flow channels formed between the plurality of ribs are narrowed at a location on the housing that corresponds to the heat generating device.

### Claim 5 (depends on 1)

The optical module of claim 1, wherein the air flow channels formed between the plurality of ribs are narrowed near a location of an optical transceiver interface of the optical module.

### Claim 6 (depends on 1)

The optical module of claim 1, wherein at least one of the first end portion or the second end portion of the at least one of the ribs has a curved smooth surface.

### Claim 7 (depends on 1)

The optical module of claim 1, wherein the plurality of ribs extend along the longitudinal direction of the optical module from an end of the housing to an opposite end of the housing.

### Claim 8 (depends on 1)

The optical module of claim 1, wherein the heat generating device is a laser, an optical receiver, or an electronic chip.

### Claim 9 (depends on 1)

The optical module of claim 1, wherein the shape of the ribs may be at least one of a spindle, an oval, a raindrop shape, or an involute shape.

### Claim 10 (depends on 1)

The optical module of claim 1, wherein the ribs and a part of the housing form a one-piece structure.