Olympus Corporation

Yusuke Yoshida

Masato Toda

Tomoya Takahashi

Yusuke Yabe

Takahiro Masaki

Masaaki Watanabe

Yutaka Shirota

Takeshi Ito

Koji Omori

Aiko Sakai

Ryo Machida

Takahiro Hayama

An endoscope illumination light switching device includes a rotation body in which a plurality of holes including a first hole are formed in a circumferential direction and that switches a hole on an irradiation optical path through rotation, a drive device configured to rotationally drive the rotation body, a sensor, and a processor configured to control a stop position of the rotation body based on a detection signal from the sensor. The rotation body includes a first detection target shape portion corresponding to the first hole, and another detection target shape portion. The sensor outputs a detection signal in response to detection of each shape portion when the rotation body rotates.

Endoscope illumination light switching device and endoscope illumination light switching method

A light source device includes has a configuration in which a height of a heat sink from a reference surface when the reference surface is a bottom surface of a housing is set to be lower than a height of a light source unit from the reference surface, and a heat pipe includes a first heat pipe, a first end part of which is connected with the heat generation body and a second end part of which is connected with the heat sink, and a second heat pipe, a third end part of which is connected with a heat generation body and a fourth end part of which is connected with the heat sink so that a distance to the second end part is longer than a distance between the first end part and the third end part.

Light source device

An optical sensor that detects intensity of light is disposed, inside an optical case, at a position that allows the optical sensor to receive light other than light received by a lens system, out of light emitted by an LED. The optical sensor is housed in a dedicated photometric case. The photometric case is provided with a light guide portion that includes a transmission part and a shielding part. The transmission part is disposed in an optical path of light that directly travels from the LED to the optical sensor and allows transmission of the light. The shielding part blocks indirect light that is reflected or scattered inside the optical case, from entering the optical sensor. Accordingly, it is possible to accurately detect only the light in the direct optical path from the LED.

Light source apparatus

A light source apparatus for endoscope includes: a housing including an intake port; a first heat radiating portion connected to a first light source and cooled by gas taken in from the intake port; a third heat radiating portion connected to a third light source, and cooled by gas taken in from the intake port; and a second heat radiating portion including a lower necessary cooling amount than the first heat radiating portion and the third heat radiating portion connected to a second light source provided in a flow path in which a flow path of the gas that passes through the first heat radiating portion and a flow path of the gas that passes through the third heat radiating portion are merged together, and cooled by merged gas merged on a merged flow path.

Light source apparatus for endoscope having first second and third heat sinks for respective light sources and a first air flow through the first and third heat sinks and a merged air flow through the second heat sink

An endoscope apparatus includes: first and second cooling units configured to cool first and second light source portions; an image pickup portion configured to generate a picked-up image; and a cooling control portion configured to control amounts of light emission of the light source portions while maintaining an amount-of-light ratio so that the brightness of the picked-up image becomes the target brightness and control cooling based on the information about the amount-of-light ratio and the brightness control information; wherein the cooling control portion decides a cooling capacity of the first cooling units and a cooling capacity of the second cooling units for cooling the respective light source portions for which the amounts of light emission are controlled, at the cooling ratio, so as to cause the light source portions to be included within a predetermined temperature range, based on the brightness control information.

Endoscope apparatus

A light source apparatus includes a cooling device configured to be able to cool a semiconductor light-emitting device, a light-emitting device drive section that supplies a semiconductor light-emitting device drive signal to the semiconductor light-emitting device, a cooling device drive section that supplies a cooling device drive signal to the cooling device, a semiconductor light-emitting device drive control section that sets a duty ratio of the semiconductor light-emitting device drive signal and controls an amount of light emission of the semiconductor light-emitting device, and a cooling device drive control section that generates the cooling device drive signal having a same duty ratio as the duty ratio of the semiconductor light-emitting device drive signal and having timing synchronized with the semiconductor light-emitting device drive signal and adjusts a signal level of the cooling device drive signal based on a measurement result of a temperature of the semiconductor light-emitting device.

Growing community of inventors

Hachioji, Japan

Yusuke Yoshida