Abstract: A light source device includes: a first semiconductor laser; a second semiconductor laser; a first collimator lens corresponding to the first semiconductor laser; a second collimator lens corresponding to the second semiconductor laser; and a deflection prism provided on the light exiting side of the first collimator lens so that an angle formed by a principal ray of first light emitted from the first semiconductor laser and a principal ray of second light emitted from the second semiconductor laser is smaller on the light exiting side of the deflection prism than on the light incident side thereof.

Abstract: Alight source apparatus includes alight source section having a first area and a second area, a first condensing optical system, a second condensing optical system, a wavelength conversion element, a reflection element, and a wavelength selective polarization element. The first area and the second area respectively emit a first light ray flux and a second light ray flux. The first light ray flux passes through the first condensing optical system to excite the wavelength conversion element. The excited wavelength conversion element emits fluorescence. The second light ray flux passes through the wavelength selective polarization element and the second condensing optical system to enter the reflection element. The wavelength selective polarization element transmits the fluorescence irrespective of the polarization state of the fluorescence to combine the second light ray flux reflected by the reflection element with the fluorescence.

Abstract: A light source device includes a light source section adapted to emit excitation light, a lens array adapted to divide the excitation light into a plurality of partial light beams, a light collection optical system adapted to collect the excitation light divided into the plurality of partial light beams, and a light emitting element adapted to emit fluorescence by being excited by the excitation light.

Abstract: A light source device includes a light source, a fluorescent layer, a diffusive reflector, a first lens unit, a second lens unit, and a light separating and synthesizing unit. The light separating and synthesizing unit divides light coming from the light source into a first light and a second light. The first light passes through the first lens unit to enter the fluorescent layer. The second light passes through the second lens unit to enter the diffusive reflector. The size of a spot of the second light on the diffusive reflector is greater than the size of a spot, of the first light on the fluorescent body layer.

Abstract: A light source apparatus includes a first reflection element for receiving a first light beam from the first light source unit, a second reflection element for receiving a second light beam from the second light source unit, and third and fourth reflection elements. The third reflection element has a first curved section on which the first light beam reflected by the first reflection element is incident, and the fourth reflection element has a second curved section on which the second light beam reflected by the second reflection element is incident. The first curved section has a first optical axis that is located outside the third reflection element and shifted away from the third reflection element toward the fourth reflection element. The first light beam reflected by the first curved section is roughly parallel to the second light beam reflected by the second curved section.

Abstract: The present invention relates to a molding material, having: (A): a fiber substrate made of carbon fibers 5 mm or longer; (B): at least either an epoxy (meth)acrylate resin or an unsaturated polyester resin; (C): (C-1) inorganic fibrous filler with a cross-sectional area of at least 0.8 ?m2, or (C-2) inorganic flaky filler with a cross-sectional area of at least 0.05 ?m2, both of which have an aspect ratio of 2.0 or higher and a length of less than 3 mm; and (D): a polyisocyanate compound.

Abstract: An optical transmitter includes: a splitter; a first optical modulator and a second optical modulator that modulate each of light beams split by the splitter; a first semiconductor optical amplifier (SOA) and a second SOA that are connected to a subsequent stage of the first optical modulator and a subsequent stage of the second optical modulator, respectively; a first detector and a second detector that detect light output intensity of the first SOA and light output intensity of the second SOA, respectively; a controller that sets gains of the first and second SOAs such that the first and second SOAs are equal in the light output intensity based on detection values of the first and second detectors; and a combiner that combines an output light beam of the first SOA and an output light beam of the second SOA.

Abstract: An optical modulator element includes first and second optical modulators, an optical input terminal, and a branch coupler. Each of the first and second optical modulators includes a pair of Mach-Zehnder waveguides, a first optical coupler to split rays from the branch coupler into the pair of Mach-Zehnder waveguides, and a second optical coupler to combine rays transmitted through the pair of Mach-Zehnder waveguides. The first and second optical modulators are disposed in such a manner that a traveling direction of rays propagating through the pair of Mach-Zehnder waveguides of the first optical modulator and a traveling direction of rays propagating through the pair of Mach-Zehnder waveguides of the second optical modulator are angled toward each other.

Abstract: The invention relates to a wavelength conversion element including: a substrate including a light-reflecting surface and rotatable around an axis of rotation; and a wavelength conversion layer supported by the light-reflecting surface. The wavelength conversion layer has a distribution of reflectance, along a circle centered on the axis of rotation, with respect to excitation light to excite the wavelength conversion layer. An average reflectance of the wavelength conversion layer with respect to the excitation light per the circle varies depending on a radius of the circle.

Abstract: Provided is a technique for enabling an ? parameter to be approximated to zero. A multiple quantum well structure includes a layer structure including a first barrier layer, an intermediate layer, a well layer, and a second barrier layer. The conduction band energies of the first and second barrier layers, the intermediate layer, and the well layer are larger in this order, and the valence band energies of the intermediate layer, the well layer, and the first and second barrier layers are larger in this order.

Abstract: Provided is a technique for reducing, using a simple circuit configuration, an amplitude difference between electric signals that are input to respective optical waveguide arms. An optical modulator includes: an optical demultiplexer that splits continuous wave light as received; first and second optical waveguide arms through which the continuous wave light as split propagates; an optical phase n shifter that introduces a phase shift of ? to the continuous wave light as split; an optical multiplexer combines the continuous wave light propagating through the first and second optical waveguide arms; first and second signal electrodes that respectively input the electric signals to the first and second optical waveguide arms; a junction capacitance connected in shunt to at least one of the first and second signal electrodes; and a DC voltage source that applies a DC voltage to the junction capacitance.

Abstract: The invention relates to a wavelength conversion element including: a base material including a light-reflecting surface; a dichroic film; and a wavelength conversion layer provided between the light-reflecting surface and the dichroic film. The dichroic film reflects portion of light in a wavelength band that the wavelength conversion layer absorbs, and has a reflectance distribution, with respect to the light along a predetermined direction.

Abstract: The invention relates to a light source device including a solid-state light source, a collimator lens which a light beam emitted from the solid-state light source enters, an afocal optical system which includes a light collecting optical system and a collimating optical system and which the light beam having been transmitted through the collimator lens enters, a lens integrator which the light beam having been transmitted through the afocal optical system enters, a polarization splitting element which the light beam having been transmitted through the lens integrator enters, and a wavelength conversion element which a first polarization component split by the polarization splitting element from the light beam enters. At least one of the light collection optical system and the collimating optical system includes a lens formed of quartz.

Abstract: An illumination device includes: a light source that emits first light at a first wavelength; an integrator optical system that the first light enters; a wavelength conversion element that converts the first light transmitting through the integrator optical system into second light at a second wavelength different from the first wavelength; a wavelength separation element provided on an optical path of the first light between the integrator optical system and the wavelength conversion element; a pickup optical system that is provided between the wavelength conversion element and the wavelength separation element and receives the first light and the second light; and a chromatic aberration-correcting optical element provided at least one of between the integrator optical system and the wavelength separation element on the optical path of the first light and at downstream of the wavelength separation element on an optical path of the second light.

Abstract: An illumination apparatus includes a light source apparatus that outputs first, second, and third light beams, an afocal system on which the first, second, and third light beams are incident, a first fly-eye lens, a second fly-eye lens, a light convergence system provided in a position downstream of the second fly-eye lens, and a phosphor layer that the first light beam, the second light beam, and the third light beam enter via the light convergence system. When a ratio between the distance between the first light beam and the second light beam and the distance between the first light beam and the third light beam is defined as a ratio R, the ratio R on the light exiting side of the afocal system differs from the ratio R on the light incident side of the afocal system.

Abstract: In a photographing apparatus, a low-pass selector controller (processor) is configured to perform a plurality of photographing operations including an LPF-ON photographing operation, which obtains an image signal from an image sensor in a state where the image sensor has been LPF driven by the image-shake correction device (driver) and obtains an optical low-pass filter effect, and an LPF-OFF photographing operation, which obtains an image signal from the image sensor in a state where the image sensor has not been LPF driven by the image-shake correction device (driver) and does not obtain an optical low-pass filter effect.

Abstract: An illuminator includes a light source section having at least one solid-state light source, a multi-lens array provided in a position downs ream of a diffractive optical member and having a plurality of lenses, and a superimposing system provided in a position downstream of the multi-lens array. The diffractive optical member divides light from the light source section into a plurality of sub-light fluxes corresponding to the plurality of lenses. Each of the plurality of sub-light fluxes is incident on a corresponding lens. The plurality of sub-light fluxes having passed through the multi-lens array are superimposed on one another on an illumination receiving region through the superimposing system.

Abstract: A light source device includes a light source array including at least one light emitting part, a collimating optical system that receives a light beam bundle emitted from the light source array, a first lens array including a plurality of first small lenses that receives the light beam bundle having passed through the collimating optical system, and a second lens array that is disposed in a subsequent stage of the first lens array and includes a plurality of second small lenses corresponding respectively to the first small lenses. The planar shape of the light emission area of the light emitting part has a short-side direction and a longitudinal direction. The planar shape of the second small lens has a longitudinal direction. The short-side direction of the light emission area crosses the longitudinal direction of the second small lens.

Abstract: A light source device includes a light source, a fluorescent layer, a diffusive reflector, a first lens unit, a second lens unit, and a light separating and synthesizing unit. The light separating and synthesizing unit divides light coming from the light source into a first light and a second light. The first light passes through the first lens unit to enter the fluorescent layer. The second light passes through the second lens unit to enter the diffusive reflector. The size of a spot of the second light on the diffusive reflector is greater than the size of a spot, of the first light on the fluorescent body layer.

Abstract: An illumination device includes a light source device adapted to emit a third light beam including a first component in a first polarization state, a polarization separation element to which the third light beam is input, a retardation element, and a diffusely reflecting element having a concavo-convex structure including a plurality of curved surfaces. The first component having passed through the retardation element via the polarization separation element, is then reflected by the diffusely reflecting element, then passed through the retardation element again, and then enters the polarization separation element. Thus, the fourth component in the second polarization state out of the first component is emitted from the illumination device via the polarization separation element.