Hamamatsu-photonics K.k.

Shinya Iwashina

Terumasa Nagano

Shunsuke Adachi

Yuki Morinaga

Shigeyuki Nakamura

Daiki Suzuki

Ryutaro Tsuchiya

Takuya Fujita

Masanori Okada

Hiroshi Okamoto

Koei Yamamoto

Takashi Baba

Sadaharu Takimoto

Masaomi Takasaka

Masakuni Kimoto

Yuki Okuwa

Tatsuya Hashi

Each of a plurality of cells includes at least one avalanche photodiode. A light projecting unit is arranged to project light having a cross-sectional shape whose longitudinal direction corresponds to a first direction. The light projecting unit is arranged to scan the light along a second direction intersecting the first direction such that the reflected light is incident on, among N cell groups each of which includes M cells aligned in a row direction, each cell group or each plurality of cell groups. A controller is arranged to apply, in accordance with the incidence of the reflected light, a bias voltage that makes the avalanche photodiode operate in a Geiger mode to each cell group or each plurality of cell groups, and is arranged to read signals from cells included in the cell group or the plurality of cell groups to which the bias voltage has been applied.

Photodetection device, semiconductor photodetection element, and method for driving semiconductor photodetection element

In a light detection device, switches are connected in parallel to each other. Each of the switches is connected to an APD. A read line electrically connects the switch and a signal processor to each other. The switch is configured such that a second terminal is connected to the read line and a voltage greater than or equal to a breakdown voltage is applied to the APD in a conductive state. The switch is configured such that the second terminal is not connected to the read line and a voltage greater than or equal to a breakdown voltage is applied to the APD in the conductive state. The switch is configured such that the second terminal is not connected to the read line and a voltage less than a breakdown voltage is applied to the APD in the conductive state.

Light detection device

In a light detection device, each pixel includes a plurality of APDs. Each APD forms a light receiving region and is configured to operate in a Geiger mode. The plurality of APDs forms a plurality of light receiving regions arranged in a direction along a main surface in a pixel area α occupied by a corresponding pixel among a plurality of pixels. The MOS switch circuit region overlaps with the plurality of light receiving regions when viewed from a Z-axis direction. When viewed from the Z-axis direction, the area of the MOS switch circuit region is greater than the area of one light receiving region formed in the pixel area, and less than or equal to the area of the pixel area. A plurality of APDs included in each pixel is electrically connected in parallel to each other and each is connected to a MOS switch circuit.

Light detection device with a plurality of avalanche photodiodes and MOS switch circuits

An optical module includes a mirror unit having a movable mirror portion, a magnet portion configured to generate a magnetic field acting on the movable mirror portion, and a package accommodating the magnet portion. The magnet portion has a Halbach structure including a first magnet applied with a force in a first direction, and a second magnet applied with a force in a second direction. The package has a bottom walls portion, a side wall portion, and a restriction portion configured to restrict movement of the second magnet in the second direction. The movable mirror portion is disposed in a space formed by the restriction portion.

Optical module and method for manufacturing optical module

In a light detection device, a circuit substrate includes a plurality of signal processing units which process a detection signal output from a corresponding pixel. Light-receiving regions of a plurality of avalanche photodiodes are two-dimensionally arranged for every pixel. In each of the signal processing units, a timing measurement unit measures timing at which light is incident on a corresponding pixel, based on the detection signal. An energy measurement unit measures energy of light incident on a corresponding pixel, based on the detection signal. A storage unit stores a measurement result in the timing measurement unit and the energy measurement unit. A light detection region where a plurality of the pixels are provided and a signal processing region where a plurality of the signal processing units are provided overlap each other at least at a part.

Light detection apparatus

A scanning-type display device includes: a light source which emits projection-display laser light; a condensing unit which condenses the laser light emitted from the light source; an optical scanning unit which uses the laser light passing through the condensing unit in scanning; and a light diffusion unit which includes a plurality of light diffusion channels arranged in two dimensions and diffuses the laser light scanned by the optical scanning unit. When a wavelength of the laser light is denoted by &#x3bb;, an effective opening diameter of the optical scanning unit is denoted by M, a distance from the optical scanning unit to the light diffusion unit is denoted by L, and an arrangement pitch of the plurality of light diffusion channels is denoted by P, the light diffusion unit is configured so that the arrangement pitch becomes a value set on the basis of P&#x2265;(4&#x3bb;L)/(&#x3c0;M).

Scanning-type display device and scanning-type display system

A scanning-type display device includes: a light source which emits projection-display laser light; an optical scanning unit which uses the laser light emitted from the light source in scanning; and a light diffusion unit which includes a plurality of light diffusion channels arranged in two dimensions and diffuses the laser light used in scanning by the optical scanning unit. The light diffusion unit is configured so that an angle formed by optical paths extending to an eye of an observer through a pair of adjacent light diffusion channels arbitrarily selected from among the plurality of light diffusion channels becomes equal to or larger than an angle set on the basis of a resolution angle of the eye.

Scanning-type display device, scanning-type display system, and method for manufacturing light-diffusing part

A mirror drive device includes a support part, a movable part, a permanent magnet forming a magnetic field in the periphery of the movable part, and a circuit board disposed between the support part and the permanent magnet in a facing direction of a pair of principal surfaces of the movable part so as to cause the movable part to be positioned at an inside of the circuit board when viewed in the facing direction. The movable part includes a mirror disposition portion, a mirror disposed and a drive coil so as to face the permanent magnet. The support part includes a base portion connected to a connection member and a reinforcing portion extending from the base portion toward a side away from the permanent magnet and the circuit board. The drive coil is connected to electrodes by lead-out conductors.

Mirror drive device and method for producing same

An optical sensor includes: a light emitting element; a lower substrateon which the light emitting elementis provided; an upper substrateprovided so that the light emitting elementis positioned between the upper substrateand the lower substrate; and an optical blockprovided on the upper substrate. The upper substrateincludes a division-type photodiode SD. The optical blockis configured to reflect light emitted from the light emitting elementtoward a measurement target R, and light reflected by the measurement target R is incident onto the division-type photodiode SD.

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Hamamatsu, Japan

Shinya Iwashina