Abstract: A light source device including: 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 illumination device includes an excitation light source which emits excitation light, a wavelength converter which generates fluorescent light having a wavelength different from that of the excitation light through the excitation of the excitation light and a light path-splitting member including a first filter and a second filter arranged to alternately come across a light path of the excitation light, wherein the first filter reflects one of the excitation light and the fluorescent light and transmits the other of the excitation light and the fluorescent light, the second filter transmits light reflected by the first filter and reflects light transmitted through the first filter, and the wavelength converter is disposed in a reflection light path or a transmission light path of the excitation light.

Abstract: An illumination light source system includes an excitation light source; a reflection/transmission member having a transmission area which transmits excitation light from the excitation light source and a reflection area which reflects the excitation light, the transmission area and the reflection area sequentially crossing an emission light path of the excitation light source; a fluorescent member provided in at least one of a reflection light path of the excitation light reflected by the reflection area and a transmission light path of the excitation light transmitted through the transmission area, the fluorescent member being provided with a phosphor which generates a color different from that of the excitation light by excitation with the excitation light; and a controller which reduces a light volume of the excitation light source while a boundary area between the transmission area and the reflection area of the reflection/transmission member is located on the emission light path.

Abstract: An illumination light generation apparatus includes a light source unit and an emission unit. The light source unit includes first and second light source groups that radiate a plurality of light beams, respectively. The first and second light source groups face each other. The emission unit emits a composite light beam in a predetermined direction and includes a first reflection part that reflects the plurality of light beams radiated from the first light source group, and an emission part that reflects the plurality of light beams reflected from the first reflection part and the plurality of light beams radiated from the second light source group. The emission part generates the composite light beam by reflecting the plurality of light beams radiated from the first light source group and the plurality of light beams radiated from the second light source group in the predetermined direction.

Abstract: A light source apparatus includes a light source unit that includes plural sets of a laser and a coupling lens corresponding to the laser, which are circumferentially provided to form a circle; and a reflecting unit placed within the circle and provided with plural reflecting surfaces corresponding to the lasers of the plural sets of the light source unit to be formed in a cone shape, the light irradiated from each of the lasers being injected into the corresponding reflecting surface via the corresponding coupling lens.

Abstract: A light source unit emitting a light on an optical axis includes a first light emitter to emit a light in a certain wavelength band, a second light emitter to emit a light in a wavelength band different from that of the first light emitter, a third light emitter to emit a light in a wavelength band different from those of the first and second light emitters, a lighting path through which the lights from the first, second, and third light emitters are guided to propagate on the optical axis and into which the light from the third light emitter is joined at a hindmost position in a traveling direction on the optical axis, and an optical adjuster to exert an optical effect on the light from the third light emitter and not to exert an optical effect on the light rays from the first and second light emitters.

Abstract: A light source unit includes a light emitting element supporter to support a plurality of light emitting elements disposed with a dispersed pattern in a two-dimensional direction as a light emitting element assembly, and light emitted from the light emitting element assembly exits to a target. The light emitting element supporter includes a ventilating hole at an inner portion of two dimensional direction of the light emitting element assembly, and cooling air, supplied from a rear side of a light emitting side of the light emitting element assembly, passes through the ventilating hole to the light emitting side of the light emitting element assembly.

Abstract: A light source unit includes a light emitting element supporter to support a plurality of light emitting elements disposed with a dispersed pattern in a two-dimensional direction as a light emitting element assembly, and light emitted from the light emitting element assembly exits to a target; a light return member disposed at a position facing a light emitting side of the light emitting element assembly while setting a space with the light emitting element supporter, the light return member returning light emitted from the light emitting element assembly toward at an inner side of two dimensional direction of the light emitting element assembly, and a flow path of the cooling air to pass through cooling air supplied from an air supply unit into the space.

Abstract: An imaging device includes a lens array including multiple lenses facing a subject; an image sensor obtaining a compound-eye image including single-eye images of the subject formed by the lenses; and a computing unit processing the compound-eye image obtained by the image sensor. The lenses have different radii of curvature and substantially the same back focal length, and the computing unit extracts an in-focus image from the compound-eye image.

Abstract: An illumination light source system includes an excitation light source; a reflection/transmission member having a transmission area which transmits excitation light from the excitation light source and a reflection area which reflects the excitation light, the transmission area and the reflection area sequentially crossing an emission light path of the excitation light source; a fluorescent member provided in at least one of a reflection light path of the excitation light reflected by the reflection area and a transmission light path of the excitation light transmitted through the transmission area, the fluorescent member being provided with a phosphor which generates a color different from that of the excitation light by excitation with the excitation light; and a controller which reduces a light volume of the excitation light source while a boundary area between the transmission area and the reflection area of the reflection/transmission member is located on the emission light path.

Abstract: An illumination light source device includes a reflection-transmission wheel provided on a light-path from an excitation light source and having a transmission region that transmits an excitation light and a reflection region reflecting the excitation light, a fluorescent wheel provided on at least one of the reflection light-path and the transmission light-path and having a fluorescent body emitting fluorescence when excited by the excitation light, and a control section turning-on the excitation light source while the boundary of the transmission region and the reflection region traverses the light-path, in order to provide an illumination light source device capable of preventing a deterioration of the fluorescent body, whereby improving a color reproducibility by use of the color mixture occurred at the boundary region between the transmission light-path and the reflection light-path effectively and improving the brightness of image.

Abstract: An illumination light generation apparatus includes a light source unit and an emission unit. The light source unit includes first and second light source groups that radiate a plurality of light beams, respectively. The first and second light source groups face each other. The emission unit emits a composite light beam in a predetermined direction and includes a first reflection part that reflects the plurality of light beams radiated from the first light source group, and an emission part that reflects the plurality of light beams reflected from the first reflection part and the plurality of light beams radiated from the second light source group. The emission part generates the composite light beam by reflecting the plurality of light beams radiated from the first light source group and the plurality of light beams radiated from the second light source group in the predetermined direction.

Abstract: Disclosed is a light deflector including a light-emitting element configured to emit a light beam with a substantially elliptical cross-sectional shape, and a lens configured to condense light emitted from the light-emitting element, wherein an optical axis of the light-emitting element and an optical axis of the lens are decentered and a longitudinal axis of the light beam with the substantially elliptical cross-sectional shape is arranged in a direction orthogonal to a direction of decentering on the lens.

Abstract: An illumination light beam forming device, including a first light source unit projecting a ring shaped light beam group, a second light source unit projecting light beams including a case the light beams being group, a combining unit for combining the light beam group projected from the first light source unit and light beams projected from the second light source unit, in which the combing unit includes a reflecting part formed to reflect one of the light beam groups, a transmitting part disposed able to transmit the other one of the light beam groups, and light beams projected from the second light source unit are disposed at an internal side of the light beam groups projected from the first light source unit when the two light beam groups are viewed from a plane including the reflecting part.

Abstract: A light source apparatus includes a first reflector having a first reflection face; a second reflector having a second reflection face, the first reflection face of the first reflector and the second reflection face of the second reflector disposed opposite each other; and a plurality of light sources being disposed around a periphery of the second reflector. Light beams emitted from the plurality of light sources reflect on the first reflector and then reflect on the second reflector.

Abstract: An image projecting device, including an image forming element for forming an image, a light source for generating light, and an imaging optical system for imaging an image formed by the image forming element on a screen, a first prism having a first transmission surface for transmitting light generated from the light source therethrough, a reflection curved surface being a curved surface for directly reflecting light having transmitted through the first transmission surface, a reflection-transmission surface for directly reflecting light reflected from the reflection curved surface to the image forming element and transmitting light reflected from the image forming element therethrough, and a second transmission surface for transmitting light reflected from the reflection-transmission surface and light reflected from the image forming element therethrough, and a second prism for directing light having transmitted through the reflection-transmission surface of the first prism to the imaging optical system.

Abstract: A scanning image displayer, including a beam provider emitting a laser beam; a beam scanner including a two-dimensional drive deflecting mirror, deflectively scanning the beam in a main scanning direction and a sub-scanning direction; and an optical element including a reflection surface before the two-dimensional drive deflecting mirror, deflecting the beam in a direction of the two-dimensional drive deflecting mirror such that the beam obliquely enters a mirror thereof. The two-dimensional drive deflecting mirror deflectively scans the beam to project the beam onto a surface to be projected, and the light intensity of the beam is controlled according to image information to form an image. A flat surface of a substrate where the mirror is formed is located parallel or almost parallel to an optical axis of the beam, and the reflection surface is located so as not to receive the beam deflectively scanned by the two-dimensional drive deflecting mirror.

Abstract: A light source apparatus includes a light source unit that includes plural sets of a laser and a coupling lens corresponding to the laser, which are circumferentially provided to form a circle; and a reflecting unit placed within the circle and provided with plural reflecting surfaces corresponding to the lasers of the plural sets of the light source unit to be formed in a cone shape, the light irradiated from each of the lasers being injected into the corresponding reflecting surface via the corresponding coupling lens.

Abstract: A polarization conversion element having plural polarization separation sections and plural phase modulation sections is disclosed. A light flux is separated into transmission light (P polarization) and reflection light (S polarization) by being input to a polarization separation section. The reflection light reflected at the polarization separation section is output in the same direction as that of the transmission light by being reflected again at an adjacent polarization separation section at a different position from a position where a light flux is input to the adjacent polarization separation section. The phase modulation section is disposed on an optical path of the transmission light or the reflection light and output light becomes the same polarization.

Abstract: A scanning image displayer, including a beam provider emitting a laser beam; a beam scanner including a two-dimensional drive deflecting mirror, deflectively scanning the beam in a main scanning direction and a sub-scanning direction; and an optical element including a reflection surface before the two-dimensional drive deflecting mirror, deflecting the beam in a direction of the two-dimensional drive deflecting mirror such that the beam obliquely enters a mirror thereof. The two-dimensional drive deflecting mirror deflectively scans the beam to project the beam onto a surface to be projected, and the light intensity of the beam is controlled according to image information to form an image. A flat surface of a substrate where the mirror is formed is located parallel or almost parallel to an optical axis of the beam, and the reflection surface is located so as not to receive the beam deflectively scanned by the two-dimensional drive deflecting mirror.