Abstract: A light guide device includes: a housing main body; a side member attached to a side portion in the housing main body; a light guide body supported by the housing main body and including a light incident surface to which light enters; a light source substrate held by the side member and including a light element that emits the light toward the light incident surface; and a positioning portion configured to position the light element to a reference position with respect to the light incident surface. The positioning portion includes: an abutting member provided in the housing main body and configured to abut on a mounting surface in the light source substrate on which the light element is mounted; and an elastic member held by the side member and configured to press the light source substrate toward the light guide body to position the light element to the reference position.

Abstract: A distance measurement device includes: a mirror disposed so as to be tilted relative to a rotation center axis; a drive unit configured to rotate the mirror about the rotation center axis; a photodetector configured to detect reflected light, of laser light, reflected in a distance measurement region; and a condensing lens disposed on the rotation center axis and configured to condense the reflected light reflected by the mirror, on the photodetector. The mirror has a shape elongated in one direction and is disposed such that a short axis thereof is tilted relative to the rotation center axis in a direction parallel to a plane including the rotation center axis. A width in a short-axis direction of the mirror is smaller than a width of a lens portion of the condensing lens as viewed in a direction parallel to the rotation center axis.

Abstract: Provided is a heater including: a substrate that has electrical conductivity; a first insulation portion that is provided on a first surface of the substrate, has an insulation property; at least one heat generation body that is provided on the first insulation portion; a second insulation portion that is provided on a second surface of the substrate which is opposite to the first surface, has an insulation property; at least one detection unit that is provided on at least one of the first insulation portion and the second insulation portion; and a first wiring which is provided on at least one of the first insulation portion and the second insulation portion, and in which one end is electrically connected to one terminal of the detection unit and the other end is electrically connected to the substrate having the electrical conductivity.

Abstract: An etalon according to the present invention is an etalon in which light is made incident from a direction different from a direction perpendicular to an incident surface and is emitted from an emission surface facing the incident surface, the etalon comprising a dielectric that has a first end surface on the incident surface side and a second end surface on the emission surface side so as to oppose the first end surface, wherein a refractive index distribution of the dielectric is set in such a manner that a lateral shift of the light becomes smaller between the first end surface and the second end surface as compared with a uniform refractive index distribution etalon under a condition that an optical path length of the light is equal. Therefore, the light according to the present invention can provide excellent wavelength controllability.

Abstract: An optical deflector which includes a dielectric having a paraelectric phase and a trap for storing an electric charge therein and deflects light transmitted through the dielectric by applying a voltage in a direction perpendicular to a transmission direction of the dielectric is provided. The optical deflector includes a first conductor, the dielectric, a second conductor, and two insulators in contact with both side surfaces parallel to a voltage application direction of the dielectric between the first conductor and the second conductor in this order, wherein a voltage is applied between the first conductor and the second conductor, a temperature of the first conductor and the second conductor is controlled independently, and one of the side surfaces of the dielectric is irradiated with excitation light through one insulator.

Abstract: An optical deflector has a dielectric of a paraelectric phase and deflects light transmitted through the dielectric by applying a voltage in a direction perpendicular to a transmission direction of the dielectric, the optical deflector including, in order, a first temperature control element, a first conductor on which a first sensor is disposed, the dielectric, a second conductor on which a second sensor is disposed, and a second temperature control element, wherein a voltage is applied between the first conductor and the second conductor, the dielectric is irradiated with excitation light having a substantially uniform intensity in an application direction of the voltage, and a temperature of the first conductor and a temperature of the second conductor are set to predetermined temperatures.

Abstract: An elastomer composition contains an elastomer, carbon nanotubes, and a compound A. The compound A is a compound that has a vapor pressure at 25° C. of 1.0 kPa or less and includes an aromatic ring. A Hansen solubility parameter distance R1 between the carbon nanotubes and the compound A is 6.0 MPa1/2 or less, and a Hansen solubility parameter distance R2 between the elastomer and the compound A is larger than R1.

Abstract: A temperature measuring device includes a Fabry-Perot interferometer, a power supply, and a light source. The temperature measuring device observes the light emitted from the light source and transmitted through the Fabry-Perot interferometer and obtains the temperature of a measurement environment in which the Fabry-Perot interferometer is placed. The light source emits a plurality of lights to the Fabry-Perot interferometer.

Abstract: A diffraction element device includes a diffractive element and a power source, the diffractive element includes a substrate and a plurality of multi-step structures, each of the multi-step structures is composed of a plurality of steps, an electrode is provided at a part of the multi-step structures, a piezoelectric material or an electrostrictive material is included in a part of the multi-step structures, the power source is connected to the electrode or the substrate, and a height of the multi-step structures changes due to a voltage applied from the power source.

Abstract: A column reader, a one-dimensional transformer, and a row writer repeat reading of one or more columns, one-dimensional transform of one or more columns, and writing of one or more rows until all original data of M rows and N columns is transformed and recorded in an auxiliary storage device as intermediate data of N rows and M columns. A column reader, a one-dimensional transformer, and a row writer repeat reading of one or more columns, one-dimensional transform of one or more columns, and writing of one or more rows until all of the intermediate data is transformed and recorded in the auxiliary storage device as final data of M rows and N columns.

Abstract: A spectroscopic device includes a first optical element for wavelength-dispersing the light, a second optical element for converging the light which has been wavelength-dispersed, a light deflector for changing a trajectory of the converged light, the light deflector being of a transmission type and having an electro-optical effect, a drive power supply that applies a voltage to the light deflector, light receiver that detects at a predetermined position the light of which the trajectory has been changed, and a process unit that derives the wavelength of the detected light from the voltage.

Abstract: A swept light source of the present invention keeps a coherence length of an output beam long over an entire sweep wavelength range. A gain of a gain medium is changed with time in response to a wavelength sweep and the coherence length is kept maximum. The gain of the gain medium is kept close to a lasing threshold and an unsaturated gain range of the gain medium is narrowed over the entire sweep wavelength range. An SOA current waveform data acquiring method of driving while keeping the coherence length long, a novel coherence length measuring method, and an optical deflector suitable for the swept light source are also disclosed.

Abstract: A laser processing apparatus includes a plurality of laser sources, an optical fiber connected to each of the plurality of laser sources, the optical fiber being one of a plurality of the optical fibers, and diffractive optical elements on which laser light beams are incident, laser light beams being emitted from the plurality of optical fibers. Diffracted light reflected by each of the diffractive optical elements forms an image on an object at a substantially identical intensity distribution and at a substantially identical focal position.

Abstract: An electro-optical device includes an electro-optic crystal, a first electrode, and a second electrode. A voltage is applied to the electro-optic crystal by the first electrode and the second electrode. The electro-optic crystal has an incident surface and an emitting surface parallel to each other and deflects incident light made incident on the incident surface at an acute incident angle in an electric field direction in which a voltage is applied. A rotation axis of an incident angle is parallel to the electric field direction.

Abstract: An angle measurement device according to the present invention relates to an angle measurement device for measuring an incident angle of an incident light ray, and includes: at least one light deflector; a driving power supply; a light receiver; and a calculation unit. The light deflector is of a transmission type, has an electro-optic effect, and is configured to change an optical path of the light ray by a voltage applied from the driving power supply, and cause the light ray to enter the light receiver. The calculation unit is configured to calculate the incident angle based on the voltage at which an intensity of the light ray detected by the light receiver is maximum.

Abstract: A first component having a plate shape includes a first incident surface and a first emission surface disposed on the opposite side of the first incident surface. The first component is made of light transmissive material having an electrostrictive effect. The first component further includes a first transparent electrode formed on the first incident surface, and a second transparent electrode formed between the first emission surface and a first reflective film.

Abstract: A parameter measurement device of a light deflector includes a photodetector that receives output light from the light deflector, a biaxial translation automatic stage that moves the photodetector to a plurality of positions, and a signal processing device that calculates the wavelength of the output light of a wavelength sweeping light source for each time, calculates the wavelength of the light received from the light deflector by the photodetector based on the output signal of the photodetector and a previously-calculated wavelength, and calculates the incident angle of the output light beam of the wavelength sweeping light source onto the diffraction grating and an angle formed by an L-axis and a line perpendicular to the surface of the diffraction grating by performing fitting so that the coordinates of the photodetector that are obtained for each position of the photodetector and the wavelength of the light conform to a prescribed relational expression.

Abstract: A fixing device includes an endless fixing belt, a heater, a pad, a stay and a pressing roller. The endless fixing belt rotates as a sheet is conveyed. The heater heats the fixing belt in a width direction. The pad comes into contact with an inner surface of the fixing belt in the width direction. The stay supports the pad inside the fixing belt. The pressing roller presses the fixing belt against the pad. The pad is made of metal.

Abstract: An optical deflection apparatus is provided with an optical deflection element and a compensating optical element. The optical deflection element deflects incident light in a first direction (a voltage application direction) in which a voltage is applied (one-dimensional scan). The compensating optical element is an element which has an incidence surface and an emission surface, which compensates for a deflection deviation in a second direction that is perpendicular to the first direction and to an optical axis of the incident light of deflected light having been deflected by the optical deflection element and incident from the incidence surface, and which arranges a direction of travel of compensated light to be emitted from the emission surface on a same plane.

Abstract: A distance measurement apparatus includes an interferometer that detects interference light obtained through interference between continuous light with a temporally swept wavelength, which is output from a wavelength swept light source, and reflected light obtained by reflecting the light by a distance measurement target, and converts the interference light into an interference electrical signal, a spectrum calculation unit that applies discrete Fourier transform to a digital interference signal obtained by the interference electrical signal being AD-converted and calculates a spectrum of a discrete frequency component with an intensity of every frequency of the interference signal as a real number, an interpolation unit that interpolates a spectrum between frequencies of the spectrum, a search unit that acquires a frequency of a peak included in the interpolated spectrum, and a distance calculation unit that calculates a distance to a distance measurement target, based on the frequency.