Abstract: A method of manufacturing a light emitting device includes providing an intermediate body having a light emitting element, a bottom part on which the light emitting element is disposed, and a first wall disposed on the bottom part and surrounding the light emitting element apart from a lateral face of the light emitting element. The method further includes disposing a light transmissive member having a height in excess of the height of the first wall and covering the upper face of the first wall and the light emitting element, forming a first groove by removing a portion of the light transmissive member thereby exposing at least a portion of the upper face of the first wall, forming a second wall by disposing a first resin in the first groove, and cutting the second wall along a lengthwise direction of the first groove thereby obtaining the light emitting device.

Abstract: A light source device comprising: a light source section which generates any one of blue light, red light, and green light; a phosphor which generates a fluorescence including the two colors other than the color of the light emitted from the light source section; a color-changing section which changes one of the two colors of the fluorescence emitted from the phosphor to another color regularly and irradiates it to the image-forming element; and a light path-switching section which switches a light path in which a fluorescence excited by the color light emitted from the light source section passes towards the color-changing section and a light path in which the color light emitted from the light source section passes towards the image-forming element regularly.

Abstract: An optical apparatus includes: a light source to emit reference light; a phototransmitter optical system to project the reference light emitted from the light source onto a measurement area extending 90 degrees or more; an image sensor having an imaging surface on which an optical image is formed; and a photoreceiver optical system to form an image of reflected light on the imaging surface, the reflected light being resulting from the reference light reflected at a measurement target present in the measurement area extending 90 degrees or more. The phototransmitter optical system and the photoreceiver optical system are disposed such that at least an optical axis of the phototransmitter optical system and an optical axis of the photoreceiver optical system partially coincide with each other, and at least a portion of the phototransmitter optical system and a portion of the photoreceiver optical system constitute a common optical system unit.

Abstract: A method of manufacturing a light emitting device is provided. The method includes providing a lead frame including a plurality of light emitting devices each including: a light emitting element; a resin molded body including a lead electrode on which the light emitting element is mounted, and a light-shielding member which supports the lead electrode and has a recess accommodating the light emitting element; and a light-transmissive member disposed in the recess. The method further includes: providing a mask including a plurality of through holes, and overlaying the mask on the lead frame so that the resin molded body and the light-transmissive member are exposed at the through holes; and perforating abrasive blasting by blowing a particulate material on a surface of the resin molded body and a surface of the light-transmissive member.

Abstract: An optical apparatus includes: a light source to emit reference light; a phototransmitter optical system to project the reference light emitted from the light source onto a measurement area extending 90 degrees or more; an image sensor having an imaging surface on which an optical image is formed; and a photoreceiver optical system to form an image of reflected light on the imaging surface, the reflected light being resulting from the reference light reflected at a measurement target present in the measurement area extending 90 degrees or more. The phototransmitter optical system and the photoreceiver optical system are disposed such that at least an optical axis of the phototransmitter optical system and an optical axis of the photoreceiver optical system partially coincide with each other, and at least a portion of the phototransmitter optical system and a portion of the photoreceiver optical system constitute a common optical system unit.

Abstract: A light source device comprising: a light source section which generates any one of blue light, red light, and green light; a phosphor which generates a fluorescence including the two colors other than the color of the light emitted from the light source section; a color-changing section which changes one of the two colors of the fluorescence emitted from the phosphor to another color regularly and irradiates it to the image-forming element; and a light path-switching section which switches a light path in which a fluorescence excited by the color light emitted from the light source section passes towards the color-changing section and a light path in which the color light emitted from the light source section passes towards the image-forming element regularly.

Abstract: A light source device comprising: a light source section which generates any one of blue light, red light, and green light; a phosphor which generates a fluorescence including the two colors other than the color of the light emitted from the light source section; a color-changing section which changes one of the two colors of the fluorescence emitted from the phosphor to another color regularly and irradiates it to the image-forming element; and a light path-switching section which switches a light path in which a fluorescence excited by the color light emitted from the light source section passes towards the color-changing section and a light path in which the color light emitted from the light source section passes towards the image-forming element regularly.

Abstract: A method of manufacturing a light emitting device is provided. The method includes providing a lead frame including a plurality of light emitting devices each including: a light emitting element; a resin molded body including a lead electrode on which the light emitting element is mounted, and a light-shielding member which supports the lead electrode and has a recess accommodating the light emitting element; and a light-transmissive member disposed in the recess. The method further includes: providing a mask including a plurality of through holes, and overlaying the mask on the lead frame so that the resin molded body and the light-transmissive member are exposed at the through holes; and perforating abrasive blasting by blowing a particulate material on a surface of the resin molded body and a surface of the light-transmissive member.

Abstract: A light source device comprising: a light source section which generates any one of blue light, red light, and green light; a phosphor which generates a fluorescence including the two colors other than the color of the light emitted from the light source section; a color-changing section which changes one of the two colors of the fluorescence emitted from the phosphor to another color regularly and irradiates it to the image-forming element; and a light path-switching section which switches a light path in which a fluorescence excited by the color light emitted from the light source section passes towards the color-changing section and a light path in which the color light emitted from the light source section passes towards the image-forming element regularly.

Abstract: A light source device comprising: a light source section which generates any one of blue light, red light, and green light; a phosphor which generates a fluorescence including the two colors other than the color of the light emitted from the light source section; a color-changing section which changes one of the two colors of the fluorescence emitted from the phosphor to another color regularly and irradiates it to the image-forming element; and a light path-switching section which switches a light path in which a fluorescence excited by the color light emitted from the light source section passes towards the color-changing section and a light path in which the color light emitted from the light source section passes towards the image-forming element regularly.

Abstract: A light source device includes a light source section that emits laser beam, a member reducing light quantity unevenness of the laser beam, a diffusion member that is provided in a traveling optical path of the laser beam between the light source section and the member reducing light quantity unevenness and diffuses the laser beam, a detection element that detects a physical characteristic of the diffusion member and outputs a state detecting signal, and an abnormal state determiner that determines an abnormal state of the diffusion member based on the state detecting signal.

Abstract: A light irradiation device for emitting light of two or more components by laser light, which a laser light source emits, to an outside, includes a diffusion optical path change member configured to convert a first color component of the laser light into diffusion light and change an optical path of the first color component; a phosphor configured to generate fluorescence of a second color component different from the first color component based on the laser light, and change an optical path of the second color component; and an optical path switch member configured to switch between a first optical path for emitting the first color component to the outside and a second optical path for emitting the second color component to the outside. Light going straight at a light diffusion position of the diffusion optical path change member is not emitted to the outside.

Abstract: A light source device includes a first light-source unit, a second light-source unit, and a third light-source unit emitting light of spectra different from each other. Each of the first through third light-source units includes a heat dissipator and a light source. The light source includes a light emitting device. The heat dissipators of the first through third light-source units are disposed in an ascending order of values of T/Q of the first through third light-source units, in a direction of cooling air flow. “Q” represents a heat generation amount from the light source of each of the first through third light-source units, when the light sources are driven to obtain predetermined light intensity and lifespan. “T” represents a preset, upper-limit temperature for the light emitting device of each of the first through third light-source units to obtain the predetermined light intensity and lifespan.

Abstract: An image projector includes a first housing, a second housing, a power transmitter, and a heat transporter. The first housing includes a light source to emit light, an image display to form an image with the light from the light source, an illumination optical device to direct the light from the light source to the image display, and a projection optical device to project the image. The second housing includes a power source to supply power, a heat dissipator to dissipate heat, and a cooler to exhaust the heat to an outside of the image projector. The power transmitter couples the first housing and the second housing to each other to transmit the power from the second housing to the first housing. The heat transporter couples the first housing and the second housing to each other to transport heat from the first housing to the second housing.

Abstract: A projection optical device includes a projection lens unit, a projection optical element, an optical housing, a holder, and a mover. The projection lens unit holds a projection lens on which a projection image generated by an image generating device is incident. The projection optical element guides the projection image, which has passed through the projection lens, to a projection surface. The optical housing is attached with the image generating device. The holder is attached to the optical housing. The holder holds the projection lens unit and the projection optical element. The mover relatively moves the holder with respect to the optical housing in an incident direction in which the projection image is incident on the projection lens.

Abstract: A light source device includes a first light-source unit, a second light-source unit, and a third light-source unit emitting light of spectra different from each other. Each of the first through third light-source units includes a heat dissipator and a light source. The light source includes a light emitting device. The heat dissipators of the first through third light-source units are disposed in an ascending order of values of T/Q of the first through third light-source units, in a direction of cooling air flow. “Q” represents a heat generation amount from the light source of each of the first through third light-source units, when the light sources are driven to obtain predetermined light intensity and lifespan. “T” represents a preset, upper-limit temperature for the light emitting device of each of the first through third light-source units to obtain the predetermined light intensity and lifespan.

Abstract: A light source device is disclosed. An embodiment of the light source device includes: an excitation light source configured to emit irradiation light of a color component to be used as excitation light and projection light; a fluorescent member disposed in an excitation light path and configured to generate fluorescence of a color component different from the color component of the irradiation light when being irradiated with the irradiation light; a light path merger unit configured to merge a fluorescence light path through which the fluorescence generated with irradiation of the irradiation light is delivered, and a projection light path through which the projection light is delivered; and a light path switch disk configured to switch the irradiation light between the excitation light path and the projection light path.

Abstract: An illumination apparatus includes: a light emitting unit that outputs light; a light condensing unit that condenses the light output from the light emitting unit; a diffusion unit that diffuses the light condensed by the light condensing unit; and a uniformizing optical system that receives the light diffused by the diffusion unit, uniformizes a brightness distribution thereof compared with that of the light being received, and outputs the resulting light.

Abstract: A light source unit includes a first reflector having a reflection face; a second reflector having a reflection face; a plurality of light sources; and a light condensing optical system to condense light emitted from the plurality of light sources. Light beams emitted from the plurality of light sources are reflected at a first reflection position on the reflection face of the first reflector, and then reflected at a second reflection position on the reflection face of the second reflector. The second reflection position is close to an optical axis of the light condensing optical system compared to the first reflection position.

Abstract: A light source device comprising: a light source section which generates any one of blue light, red light, and green light; a phosphor which generates a fluorescence including the two colors other than the color of the light emitted from the light source section; a color-changing section which changes one of the two colors of the fluorescence emitted from the phosphor to another color regularly and irradiates it to the image-forming element; and a light path-switching section which switches a light path in which a fluorescence excited by the color light emitted from the light source section passes towards the color-changing section and a light path in which the color light emitted from the light source section passes towards the image-forming element regularly.