# US 12,222,222 B2 · Sensor cover and sensor module

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- Number: US 12,222,222 B2
- Document ID: US12222222B2
- Status: Granted
- Kind: B2
- Application number: 18/625,325
- Filed: 2024-04-03
- Published: 2024-08-08
- Granted: 2025-02-11
- Earliest claimed: 2021-10-22
- Assignees: AGC Inc.
- Applicants: AGC Inc.
- Inventors: Kazuya Takemoto; Atsushi Koyanagi; Naoto Tatsuoka
- Web page: https://patentgrep.com/patent/US12222222B2

## CPC

- G01D 11/245: {Housings for sensors}
- G01S 7/481: Constructional features, e.g. arrangements of optical elements
- G01S 7/4813: {Housing arrangements}
- G01S 17/931: of land vehicles
- G02B 5/26: Reflecting filters (G02B5/28 takes precedence)
- G02B 5/28: Interference filters
- G02B 5/281: {designed for the infrared light}
- H05B 3/16: the conductor being mounted on an insulating base
- G01S 2007/4977: {including means to prevent or remove the obstruction}
- G01D: MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01S: RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL

## Abstract

A sensor cover, provided in an opening of a housing that houses a sensor, includes a conductor; a dielectric multilayer film; and a heating film, in a desired order from an outside of the housing toward an inside of the housing. The conductor and the heating film are insulated from each other. A shortest distance between the conductor and the heating film is 2.0 μm or more.

## Claims

### Claim 1

A sensor cover positioned in an opening of a housing that houses a sensor, the sensor cover comprising:
a conductor;
a dielectric multilayer film; and
a heating film, the conductor, the dielectric multilayer film, and the heating film being positioned in a predetermined order from an outside of the housing toward an inside of the housing,
wherein the conductor is a substrate which comprises a conductive material and has a thickness of 0.1 mm or more,
the conductor and the heating film are insulated from each other,
the conductor is electrically connected to a ground, and
a shortest distance between the conductor and the heating film is 2.0 μm or more.

### Claim 2 (depends on 1)

The sensor cover according to claim 1, wherein the housing comprises a conductive material, and the conductor is electrically connected to the housing as the ground.

### Claim 3 (depends on 1)

The sensor cover according to claim 1, wherein the heating film is electrically connected to a power source.

### Claim 4 (depends on 1)

The sensor cover according to claim 1, wherein the heating film is formed in a linear shape.

### Claim 5 (depends on 1)

The sensor cover according to claim 1, wherein a current value when a voltage of 12 V is applied to the shortest path between the conductor and the heating film is equal to or less than 1 mA.

### Claim 6 (depends on 1)

The sensor cover according to claim 1, further comprising:
an insulating film between the dielectric multilayer film and the heating film.

### Claim 7 (depends on 1)

The sensor cover according to claim 1, further comprising:
a second dielectric multilayer film positioned on an opposite side of the conductor from the dielectric multilayer film.

### Claim 8 (depends on 1)

The sensor cover according to claim 1, wherein
the sensor cover is an infrared pass filter configured to transmit near-infrared rays and block visible light.

### Claim 9 (depends on 1)

The sensor cover according to claim 1, wherein
the sensor is a light detection and ranging (LiDAR) sensor.

### Claim 10 (depends on 1)

A sensor module, comprising:
the sensor cover of claim 1;
the housing; and
the sensor.

### Claim 11 (depends on 4)

The sensor cover according to claim 4, further comprising:
an insulating film between the dielectric multilayer film and the heating film,
wherein the insulating film is formed in a band shape along the heating film formed in the linear shape.