Abstract: An endoscope includes a phosphor layer, and a light output layer; wherein the light output layer emits a first excitation light and a second excitation light to illuminate an object space, through the phosphor layer, with first and second combined light, an intensity of the first excitation light has an absolute maximum at a first peak wavelength, an intensity of the second excitation light has an absolute maximum at a second peak wavelength different from the first peak wavelength, the phosphor layer comprises one or more phosphors, each of the one or more phosphors is configured to be excited by the first excitation light to generate first excited light of the respective phosphor, each of the one or more phosphors is configured to be excited by the second excitation light to generate second excited light of the respective phosphor.

Abstract: It is provided an illumination apparatus, comprising a beam combiner comprising two dichroic reflective surfaces and configured to combine a first light from a first light source, a second light from a second light source, and a third light from a third light source into combined light; a combination of the second light passing through the combiner and the third light passing through the combiner is closer to the white point than each of the second light and the first light passing through the combining portion; or the third light passing through the combiner is closer to the white point than each of the second light and the first light passing through the combining portion.

Abstract: Provided is a technique for further reducing the scale of an endoscope system. An optical distribution connector according to the present disclosure discloses an optical distribution connector (additional connector) which includes an optical connector portion that is configured to be attachable to and detachable from a processor and realizes an optical connection with the processor, a plurality of medical device mounting portions, each of which is attachable to and detachable from a medical device, and at least one optical element that distributes light emitted from a light source included in the processor in each direction of the plurality of medical device mounting portions. In this optical distribution connector, at least one optical element has a spectral distribution wavelength characteristic defined by the light transmittance and the light reflectance for each of the plurality of wavelength bands of light (see FIG. 5).

Abstract: It is provided an illumination apparatus, comprising a first light source mounted on a board emitting first light having a first wavelength spectrum; a second light source mounted on the board emitting second light having a second wavelength spectrum; a phosphor layer converting at least a part of at least one of the first light and the second light into first converted light and second converted light, respectively; wherein the phosphor layer emits a remaining part of the first light, a remaining part of the second light, the first converted light, and the second converted light; the phosphor layer is in contact with the first and second light sources and continuous on the first and second light sources, and on a path on the board connecting the first and second light sources; the phosphor layer and the board surround the first light source and the second light source.

Abstract: It is provided an illumination apparatus for outputting an output light, comprising a first light source configured to emit first light with a first peak wavelength in a first range of 660 nm to 699 nm; a second light source configured to emit second light with a second peak wavelength in a second range of 689 nm to 705 nm; wherein the second peak wavelength is larger than the first peak wavelength by at least 5 nm; the second light source is configured to be switched on and off independently from the first light source; the apparatus is configured to output the first light as the output light if the second light source is switched off and to output the first light and the second light as the output light is the second light source is switched on.

Abstract: An illumination apparatus includes an exit layer including a phosphor; a plurality of first light sources and a plurality of second light sources; wherein, the first light sources and the second light sources are arranged in plural unit cells; the plurality of the first light sources is controllable separately from the plurality of the second light sources; the first and second light sources are arranged spaced apart from the exit layer; the phosphor converts at least a portion of the first lights into first converted lights; if the first and second light sources emit the first and second lights, respectively, on a line connecting corresponding positions of two adjacent unit cells of the plurality of unit cells projected on the exit layer, a variation of a total intensity of the respective lights is less than 20%.

Abstract: A light source device includes: a first optical element that generates transmitted light obtained by removing a first wavelength band component from incident light and generates reflected light obtained by extracting the first wavelength band component from the incident light; a first light source that emits light that includes at least a component of the first wavelength band and that causes the light to be incident on the first optical element so as to be reflected light of the first optical element; a second light source that emits light so that light including a component of a wide second wavelength band including the first wavelength band to be transmitted light of the first optical element; and a control unit that controls driving of the first light source and the second light source. The control unit controls on/off of emission of the first and second light source emission light.

Abstract: Provided is an endoscope system that inexpensively guides an extra-fine endoscope using an overtube. An endoscope system includes an endoscope and an overtube. The overtube includes an endoscope channel that allows passage of the endoscope, being bendable according to an operation. The endoscope includes a light irradiation unit and an imaging unit.

Abstract: An endoscope includes an insertion portion that is covered with an exterior tube with an outer diameter of 1 mm or less, an observation optical system that includes a rectangular image sensor fixed to a tip of the insertion portion and having a length of one side of 60% or less of the outer diameter of the insertion portion, an illumination fiber that is arranged between an inner surface of the exterior tube and an edge of the observation optical system and penetrates the exterior tube, a cable bundle that is connected to the image sensor and penetrates the exterior tube, and a connector that is connected to the cable bundle and the illumination fiber.

Abstract: Provided is a technique for further reducing the scale of an endoscope system. An optical distribution connector according to the present disclosure discloses an optical distribution connector (additional connector) which includes an optical connector portion that is configured to be attachable to and detachable from a processor and realizes an optical connection with the processor, a plurality of medical device mounting portions, each of which is attachable to and detachable from a medical device, and at least one optical element that distributes light emitted from a light source included in the processor in each direction of the plurality of medical device mounting portions. In this optical distribution connector, at least one optical element has a spectral distribution wavelength characteristic defined by the light transmittance and the light reflectance for each of the plurality of wavelength bands of light (see FIG. 5).

Abstract: An endoscope light source device is constituted by a first light source unit that emits light in a first wavelength band, a second light source unit that emits light in a second wavelength band, a light path combining means for combining the light paths of the light emitted from the first and second light source units, and a light source control means for controlling light emission of the light source units separately. When the light source units are driven to emit light in a first mode, the respective wavelength bands of light are emitted at a first intensity ratio and combined with each other to obtain normal light, which is supplied to an endoscope.

Abstract: A light source device includes: a first optical element that generates transmitted light obtained by removing a first wavelength band component from incident light and generates reflected light obtained by extracting the first wavelength band component from the incident light; a first light source that emits light that includes at least a component of the first wavelength band and that causes the light to be incident on the first optical element so as to be reflected light of the first optical element; a second light source that emits light so that light including a component of a wide second wavelength band including the first wavelength band to be transmitted light of the first optical element; and a control unit that controls driving of the first light source and the second light source. The control unit controls on/off of emission of the first and second light source emission light.

Abstract: An endoscope light source device is constituted by a first light source unit that emits light in a first wavelength band, a second light source unit that emits light in a second wavelength band, a light path combining means for combining the light paths of the light emitted from the first and second light source units, and a light source control means for controlling light emission of the light source units separately. When the light source units are driven to emit light in a first mode, the respective wavelength bands of light are emitted at a first intensity ratio and combined with each other to obtain normal light, which is supplied to an endoscope.

Abstract: An endoscope light source device is constituted by a first light source unit that emits light in a first wavelength band, a second light source unit that emits light in a second wavelength band, a light path combining means for combining the light paths of the light emitted from the first and second light source units, and a light source control means for controlling light emission of the light source units separately. When the light source units are driven to emit light in a first mode, the respective wavelength bands of light are emitted at a first intensity ratio and combined with each other to obtain normal light, which is supplied to an endoscope.

Abstract: An electronic scope capable of preventing reduction in the amount of light in a desired wavelength band is configured to be inserted into a body cavity, and includes: an insertion tube having a light emission port in its tip portion; a light guide configured to guide light down to the tip portion of the insertion tube to emit first light from the tip portion; and a light emitting device configured to emit second light from the tip portion, the light transmittance of the light guide for the wavelength band of the second light being less than or equal to the transmittance for the wavelength band of the first light. The light path length of the second light from the light emitting device to an emission port for the second light provided in the tip portion is shorter than the light path length of the first light in the light guide.

Abstract: A light source unit of a light source device for an endoscope, which makes it possible to improve light use efficiency regarding illumination light without upsizing an optical system, includes: a solid-state light emitting element for emitting light from a light emitting surface; and a cover member that covers the solid-state light emitting element such that the cover member is spaced apart from the light emitting surface. In this configuration, the cover member includes a reflective surface that reflects light emitted from the light emitting surface, and an opening from which light is emitted.

Abstract: An endoscope light source device is constituted by a first light source unit that emits light in a first wavelength band, a second light source unit that emits light in a second wavelength band, a light path combining means for combining the light paths of the light emitted from the first and second light source units, and a light source control means for controlling light emission of the light source units separately. When the light source units are driven to emit light in a first mode, the respective wavelength bands of light are emitted at a first intensity ratio and combined with each other to obtain normal light, which is supplied to an endoscope.

Abstract: An endoscope processor includes a connector configured to connect with a second connector, provided on an endoscope; a protective ground-contact connected to ground; and an electrostatic inductor connected to, and electrically conductive with, the protective ground-contact, the electrostatic inductor positioned in a connection space between the connector and the second connector when the endoscope and the endoscope processor are not connected to each other.

Abstract: A light source apparatus that is provided includes: a light source; a switch for switching the light path of irradiation light emitted by the light source between a first light path and a second light path; and an optical filter that is fixedly arranged in the first light path and filters irradiation light propagating along the first light path into light in a specific wavelength region.

Abstract: An endoscope system includes: a first light source that emits first light; a first light guide that guides the first light received from the first light source toward a subject; a second light source that emits second light having a different wavelength region from the first light; a second light guide that guides the second light received from the second light source toward the subject; and a blocker that alternatingly blocks the first light traveling from the first light source toward the first light guide and the second light traveling from the second light source toward the second light guide.