Granted Patent B2

US 12,396,629 · App. 17/885,057 · Granted Aug 26, 2025

Inventor: Motoki Tabata (Akishima, JP)

Assignee: OLYMPUS CORPORATION

A61B1/0655A61B1/00097A61B1/0638A61B1/0669A61B1/07

Abstract

Claims (39)

1. A light source device for use with a medical device, the light source device comprising:

a first light source configured to emit light of a first wavelength;

a second light source configured to emit light of a second wavelength;

a multiplexer configured to multiplex the light emitted by the first and second light sources and direct multiplexed light to an optical path;

a diffuser provided between the multiplexer and an input end of a light guide disposed in the optical path, the diffuser configured to diffuse a portion of the multiplexed light to an outside of the optical path;

a sensor provided outside the optical path and the sensor is positioned between the diffuser and the input end of the light guide, the sensor configured to detect a quantity of at least the portion of the light diffused by the diffuser; and

a condenser lens on which the multiplexed light is incident, the condenser lens configured to condense the incident multiplexed light to the input end of the light guide,

wherein the diffuser is provided in a portion of the condenser lens.

2. The light source device according to claim 1 , wherein the sensor is configured to detect a quantity of the light of each of the first wavelength and the second wavelength, from the light diffused by the diffuser.

3. The light source device according to claim 1 , wherein the diffuser is arranged peripheral to a center of the condenser lens, the center being on an optical axis of the optical path.

4. The light source device according to claim 1 , wherein the diffuser is arranged at a position including a center of the condenser lens, the center being on an optical axis of the optical path.

5. The light source device according to claim 1 , further comprising:

a holder provided on one side of the condenser lens, the one side being a side of the condenser lens closer to the light guide, the holder being configured to hold the sensor.

6. The light source device according to claim 1 , wherein the sensor including a first filter configured to transmit therethrough the light of the first wavelength and a second filter configured to transmit therethrough the light of the second wavelength.

7. The light source device according to claim 1 , wherein the sensor comprises:

a first sensor configured to detect a quantity of the light of the first wavelength; and

a second sensor configured to detect quantity of the light of the second wavelength.

8. The light source device according to claim 1 , further comprising:

a controller configured to control, based on a detection result of the sensor, a quantity of light emitted by at least one of the first and second light sources.

9. The light source device according to claim 1 , wherein the second wavelength is different from the first wavelength.

10. The light source device according to claim 1 , wherein the first wavelength is a first wavelength band and the second wavelength is a second wavelength band.

11. The light source device according to claim 1 , further comprising a third light source configured to emit light of a third wavelength;

wherein the multiplexer is configured to multiplex the light emitted by the first, second and third light sources and direct the multiplexed light to the optical path.

12. The light source device according to claim 11 , further comprising a fourth light source configured to emit light of a fourth wavelength;

wherein the multiplexer is configured to multiplex the light emitted by the first, second, third and fourth light sources and direct the multiplexed light to the optical path.

13. The light source device according to claim 12 , further comprising a fifth light source configured to emit light of a fifth wavelength;

wherein the multiplexer is configured to multiplex the light emitted by the first, second, third, fourth and fifth light sources and direct the multiplexed light to the optical path.

14. The light source device according to claim 1 , wherein

the sensor comprising first and second sensors, for detecting the first and second wavelengths, respectively, from at least the portion of the light diffused by the diffuser; and

the first and second sensors are positioned separated in a direction orthogonal to an optical axis direction.

15. A method for adjusting a light quantity provided to a medical device, the method comprising:

emitting light of a first wavelength by a first light source;

emitting light of a second wavelength by a second light source;

combining, by a multiplexer, the light emitted by the first and second light sources, and directing combined light to an optical path;

diffusing, by a diffuser positioned between the multiplexer and an input end of the light guide, a portion of the combined light to an outside of the optical path;

condensing, by a condenser lens on which the multiplexed light is incident, the condenser lens configured to condense the incident multiplexed light to the input end of the light guide, wherein the diffuser is provided in a portion of the condenser lens;

providing a sensor outside the optical path for the input to the light guide;

detecting, by a sensor positioned outside the optical path of the light guide and the sensor is positioned between the diffuser and the input end of the light guide, a quantity of at least the portion of the light diffused by the diffuser; and

controlling a quantity of light emitted by at least one of the first and second light sources based on a detection result of the sensor.

Assignments (1)

Continuity (2)

References Cited (24)