# US 11,910,106 B2 · Light source device and endoscope system including the same

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- Number: US 11,910,106 B2
- Document ID: US11910106B2
- Status: Granted
- Kind: B2
- Application number: 18/358,187
- Filed: 2023-07-25
- Published: 2023-11-16
- Granted: 2024-02-20
- Earliest claimed: 2021-09-14
- Assignees: Olympus Corporation
- Applicants: Olympus Corporation
- Inventors: Hiroyuki Kamee; Takeshi Ito; Masahiro Nishio; Satoshi Tanaka
- Web page: https://patentgrep.com/patent/US11910106B2

## CPC

- H04N 25/11: Arrangement of colour filter arrays [CFA]; Filter mosaics
- A61B 1/07: using light-conductive means, e.g. optical fibres
- G02B 23/2461: {Illumination}
- H04N 23/10: for generating image signals from different wavelengths
- H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof
- H04N 23/555: {for picking-up images in sites, inaccessible due to their dimensions or hazardous conditions, e.g. endoscopes or borescopes}
- H04N 23/56: provided with illuminating means
- H05B 45/22: using optical feedback
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- 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 light source device includes a plurality of light emitters, an optical system configured to combine light from the light emitters, a wavelength selective filter located on an optical path of the optical system, and an optical sensor configured to receive light from one light emitter among the light emitters through an optical filter. The optical filter has a wavelength selection characteristic corresponding to a wavelength selection characteristic of the wavelength selective filter.

## Claims

### Claim 1

A light source device comprising:
a plurality of light emitters;
an optical system configured to combine light from the light emitters;
a wavelength selective filter located on an optical path of the optical system; and
an optical sensor configured to receive light from one light emitter among the light emitters through an optical filter, wherein
the optical filter has a wavelength selection characteristic corresponding to a wavelength selection characteristic of the wavelength selective filter.

### Claim 2 (depends on 1)

The light source device according to claim 1, wherein the wavelength selection characteristic of the optical filter is identical to the wavelength selection characteristic of the wavelength selective filter.

### Claim 3 (depends on 1)

The light source device according to claim 1, wherein
the light source device has a plurality of light emission modes,
in the light emission modes, a wavelength band of emitted light is different in each of the light emission modes, and
the light emission modes include a first light emission mode in which the wavelength selective filter is located on the optical path and a second light emission mode in which the wavelength selective filter is not located on the optical path.

### Claim 4 (depends on 3)

The light source device according to claim 3, wherein
the light source device comprises a plurality of optical sensors,
one of the plurality of optical sensors is the optical sensor,
the plurality of optical sensors receive light from the one light emitter, and
in the optical sensors, wavelength bands of received light are different from each other.

### Claim 5 (depends on 3)

The light source device according to claim 3, wherein
the light source device comprises a plurality of optical filters,
one of the plurality of optical filters is the optical filter,
in the plurality of optical filters, wavelength selection characteristics are different from each other, and
the optical filters are switched and light is received by the optical sensor.

### Claim 6 (depends on 1)

The light source device according to claim 1, wherein
the wavelength selection characteristic of the optical filter is a wavelength selection characteristic in which the wavelength selection characteristic of the wavelength selective filter is shifted to a longer wavelength side, and
an amount of the shift is based on an angle between an optical path from the light emitter toward the optical sensor and an optical path from the light emitter toward the optical system.

### Claim 7 (depends on 3)

The light source device according to claim 3, wherein
the light source device comprises a plurality of optical sensors configured to receive light from the one light emitter, and
the plurality of optical sensors are installed in an identical tilt angle direction relative to an optical axis of the light emitter.

### Claim 8 (depends on 1)

An endoscope system comprising:
an endoscope;
a video processor;
a monitor; and
the light source device according to claim 1.