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公开(公告)号：US20230102241A1
公开(公告)日：2023-03-30
申请号：US17801004
申请日：2021-02-15
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Tatsuya HASHI , Shinya IWASHINA , Takashi BABA , Shigeyuki NAKAMURA
IPC: G01J1/44 , G01S7/487 , G01S7/493 , G01S7/481 , H01L27/144
Abstract: 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.
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公开(公告)号：US20220342206A1
公开(公告)日：2022-10-27
申请号：US17763285
申请日：2020-09-09
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Shinya IWASHINA , Shigeyuki NAKAMURA , Naoto SAKURAI , Yuki MORINAGA , Daiki SUZUKI
Abstract: In an optical device, a mirror surface is provided in a movable portion. A support portion supports the movable portion through an elastic connection portion. A force generator generates force in the movable portion. A drive controller outputs a drive signal that operates the force generator. The movable portion has a resonance frequency higher than a frequency of the drive signal output from the drive controller in a state before the elastic connection portion is heated. The movable portion swings due to the elastic deformation of the elastic connection portion in response to the force of the force generator. A heat controller acquires a signal that indicates a swing state of the movable portion and performs, based on a phase of the acquired signal, feedback control of heating of the elastic connection portion by a heater.
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公开(公告)号：US20200257130A1
公开(公告)日：2020-08-13
申请号：US16621391
申请日：2018-06-11
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Shinya IWASHINA
Abstract: 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 λ, 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≥(4λL)/(πM).
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公开(公告)号：US20200174247A1
公开(公告)日：2020-06-04
申请号：US16636413
申请日：2018-08-06
Applicant: HAMAMATSU PHOTONICS K.K.
Inventor： Daiki SUZUKI , Shinya IWASHINA , Yuki MORINAGA
Abstract: 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.
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