Abstract: To provide an optical module that can synchronize a vibration frequency and a swing angle without complicating a system. An optical module including: a double-sided mirror that rotates or undergoes pendulum motion about at least one rotation axis; a plane mirror disposed at an angle of 45 degrees from a horizontal surface on a back surface side of the double-sided mirror; and a uniaxial retroreflective mirror disposed at an angle of 45 degrees from the horizontal surface on a front surface side of the double-sided mirror, in which an axis of retroreflective is perpendicular to the horizontal surface and a normal line of the uniaxial retroreflective mirror.

Abstract: A method for manufacturing a non-circular wound magnetic core composed of a nano-crystallized soft magnetic alloy thin strip comprises: a step for acquiring a multilayer body by winding a soft magnetic alloy thin strip; a step for nano-crystallizing the soft magnetic alloy thin strip by inserting a heat treatment inner peripheral jig to the inner peripheral side of the multilayer body, maintaining the multilayer body in a non-circular shape, and subjecting the multilayer body to a heat treatment; and a step for maintaining the nano-crystallized multilayer body in the non-circular shape by using outer and inner peripheral jigs and impregnating resin between the layers of the multilayer body. The resin impregnation inner and outer peripheral jigs are shaped so as to not contact the inner peripheral surface and/or the outer peripheral surface of the multilayer body at a part where the multilayer body has a large degree of curvature.

Abstract: A semiconductor laser drive circuit includes: an anode electrode divided into at least one gain region and at least one light absorption region; a cathode electrode shared between the gain region and the light absorption region; and a resistance connected to the anode electrode of the light absorption region.

Abstract: A MEMS device includes: a first beam and a second beam that are symmetrically disposed with respect to a first rotation axis of a mirror portion, in which a third beam is disposed on a side opposite to the first beam and the second beam with reference to a line that is orthogonal to the first rotation axis and passes through a center of gravity of the mirror portion.

Abstract: There is provided a Q-switched semiconductor light-emitting element, including a comb electrode that has at least two or more gain regions and two or more absorption regions, the regions including an active layer and being continuous on a semiconductor substrate, separation regions being provided between the gain regions and the absorption regions, the longest region of the gain regions being located on a rear end surface side; and an optical waveguide that staddles the gain regions, the absorption regions, and the separation regions.

Abstract: A distance measurement apparatus including at least one measurement unit, in which the measurement unit includes: a voltage level converter that applies an arbitrary bias to a voltage obtained on the basis of an output from a light receiver to offset a level of the voltage; an amplifier that amplifies a voltage output from the voltage level converter; and a measurement section that measures a timing at which an output from the amplifier reaches a predetermined threshold.

Abstract: Provided is a distance measurement apparatus including a light projector that projects reference pulsed light to an object region, a light receiver that receives reflected pulsed light from the object region, and a scanning unit including a plurality of movable mirrors provided between the light projector and the object region and synchronously operated. The distance measurement apparatus further includes a calculation unit that calculates a distance to the object region on the basis of a difference between light projection timing of projecting the reference pulsed light and light receiving timing of receiving the reflected pulsed light.

Abstract: Provided is a light-emitting device that includes a first electrode layer, a first conduction type layer, a second conduction type layer, an active layer, and a second electrode layer. The first conduction type layer includes a current injection region formed by the first electrode layer and a current non-injection region. A waveguide structure included in the first conduction type layer, the active layer, and the second conduction type layer includes a first region and a second region. The first region has a first waveguide that is the current injection region and the current non-injection region and has a first refractive index difference. The second region has a second waveguide arranged to be extended from the first waveguide to the first end and has a second refractive index difference greater than the first refractive index difference. The second waveguide has a region narrowing toward the first end.

Abstract: A distance sensor apparatus includes: a light receiving unit that receives reflected light from a subject, the light receiving unit including a light receiving element unit and a drive unit that supplies a drive voltage to the light receiving element unit, in which an application voltage to the light receiving element unit becomes larger than a breakdown voltage in a distance measurement period by the drive voltage, and the application voltage becomes larger with passage of time.

Abstract: [Object] To provide an optical device and a display apparatus capable of decreasing a waveguide loss, inhibiting a laser oscillation, and achieving a high-output. [Solving Means] An optical device includes a first electrode layer, a first conduction type layer, a second conduction type layer, an active layer, and a second electrode layer. The first conduction type layer includes a current injection region formed by the first electrode layer and a current non-injection region. A waveguide structure included in the first conduction type layer, the active layer, and the second conduction type layer includes a first region and a second region. The first region has a first waveguide that is the current injection region and the current non-injection region and having a first refractive index difference. The second region has a second waveguide arranged to be extended from the first waveguide to the first end and has a second refractive index difference greater than the first refractive index difference.

Abstract: A correction device including a photon number counting unit that counts a photon number on the basis of an output signal output from a light receiving unit, a correction value acquiring unit that acquires a correction value corresponding to the photon number, and a correction unit that performs correction based on the correction value.

Abstract: A ranging device provided with a light projecting unit for projecting a reference pulse set row including a main pulse and at least one sub pulse, a light receiving unit for receiving a reflected pulse set row obtained by reflection of the reference pulse set row by an object to be measured, and an identifying unit for identifying the reflected pulse set row corresponding to the reference pulse set row. The ranging device is further provided with a calculating unit for calculating a distance to the object to be measured on the basis of a delay time difference between the reference pulse set row and the reflected pulse set row corresponding to the reference pulse set row. The light projecting unit projects a plurality of reference pulse set rows having different pulse intervals.

Abstract: A semiconductor laser drive circuit includes: an anode electrode divided into at least one gain region and at least one light absorption region; a cathode electrode shared between the gain region and the light absorption region; and a resistance connected to the anode electrode of the light absorption region.

Abstract: [Object] To provide an optical device and a display apparatus capable of decreasing a waveguide loss, inhibiting a laser oscillation, and achieving a high-output. [Solving Means] An optical device includes a first electrode layer, a first conduction type layer, a second conduction type layer, an active layer, and a second electrode layer. The first conduction type layer includes a current injection region formed by the first electrode layer and a current non-injection region. A waveguide structure included in the first conduction type layer, the active layer, and the second conduction type layer includes a first region and a second region. The first region has a first waveguide that is the current injection region and the current non-injection region and having a first refractive index difference. The second region has a second waveguide arranged to be extended from the first waveguide to the first end and has a second refractive index difference greater than the first refractive index difference.

Abstract: A distance measurement apparatus includes at least one measurement unit. The measurement unit includes a first light reception section including a plurality of photon counting type light reception devices connected to each other and a first conversion section that converts a current outputted from the first light reception section into a voltage. The measurement unit further includes a first amplification section that outputs an amplification value obtained by amplifying the voltage outputted from the first conversion section and outputs, when the amplification value exceeds a given limit value, the limit value as the amplification value. The measurement unit further includes a first measurement section that measures a timing at which the output value from the first amplification section reaches a given threshold value.

Abstract: A light source module according to an embodiment of the present disclosure includes: a radiator; a plurality of light-emitting elements disposed on the radiator; a plurality of lenses that each convert a light beam outputted from corresponding one of the plurality of light-emitting elements into a collimated light beam and output the collimated light beam; a plurality of first optical elements that each reflect the collimated light beam outputted from corresponding one of the plurality of lenses while adjusting an optical axis direction of the collimated light beam; and a second optical element that multiplexes respective light beams reflected from the plurality of first optical elements.

Abstract: [Object] To provide an optical element and a display apparatus capable of reducing a waveguide loss and achieving laser oscillation suppression and a high output. [Solving Means] An optical element according to the present technology includes a substrate, a first end which is a light emission end, and a second end provided on an opposite side to the first end, the optical element including a first electrode layer, a first semiconductor layer, a second semiconductor layer, an active layer, and a second electrode layer. The first electrode layer has a stripe form extended from the second end toward the first end. A waveguide structure included in the first conductivity type layer, the active layer, and second conductivity type layer includes a first waveguide and a second waveguide, and the second waveguide has a tapered structure that makes a beam spot of light incident from the first waveguide smaller.

Abstract: In a semiconductor laser according to an embodiment of the present disclosure, a ridge part has a structure in which a plurality of gain regions and a plurality of Q-switch regions are each disposed alternately with each of separation regions being interposed therebetween in an extending direction of the ridge part. The separation regions each have a separation groove that separates from each other, by a space, the gain region and the Q-switch region adjacent to each other. The separation groove has a bottom surface at a position, in a second semiconductor layer, higher than a part corresponding to a foot of each of both sides of the ridge part.

Abstract: A movable body according to an embodiment of the present disclosure includes a vehicle body and an information display apparatus mounted on the vehicle body. The information display apparatus provided at the movable body includes a light projecting part that projects a luminous flux and a reflector that reflects the luminous flux from the light projecting part. The reflector includes a plurality of unit regions two-dimensionally arranged over a main surface. Each of the unit regions includes a plurality of reflecting surfaces two-dimensionally arranged, and splits a luminous flux entering the plurality of reflecting surfaces to perform reflection in a plurality of directions.

Abstract: In a semiconductor laser according to an embodiment of the present disclosure, a ridge part has a structure in which a plurality of gain regions and a plurality of Q-switch regions are each disposed alternately with each of separation regions being interposed therebetween in an extending direction of the ridge part. The separation regions each have a separation groove that separates from each other, by a space, the gain region and the Q-switch region adjacent to each other. The separation groove has a bottom surface at a position, in a second semiconductor layer, higher than a part corresponding to a foot of each of both sides of the ridge part. The semiconductor laser includes an electrode provided over the bottom surface of each separation groove with an insulating layer being interposed therebetween.