公开(公告)号：US20220035056A1

公开(公告)日：2022-02-03

申请号：US17502424

申请日：2021-10-15

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tadashi MARUNO ,  Eiji TODA ,  Mao NAKAJIMA ,  Teruo TAKAHASHI ,  Takafumi HIGUCHI

IPC: G01T1/24 ,  H04N5/374 ,  H04N5/376 ,  H04N5/363 ,  H04N5/3745 ,  H04N5/378

Abstract: A photon counting device includes a plurality of pixels each including a photoelectric conversion element configured to convert input light to charge, and an amplifier configured to amplify the charge converted by the photoelectric conversion element and convert the charge to a voltage, an A/D converter configured to convert the voltages output from the amplifiers of the plurality of pixels to digital values; and a conversion unit configured to convert the digital value output from the A/D converter to the number of photons by referring to reference data, for each of the plurality of pixels, and the reference data is created based on a gain and an offset value for each of the plurality of pixels.

公开(公告)号：US20200374478A1

公开(公告)日：2020-11-26

申请号：US16764066

申请日：2018-06-18

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tadashi MARUNO ,  Eiji TODA ,  Mao NAKAJIMA ,  Teruo TAKAHASHI ,  Takafumi HIGUCHI

IPC: H04N5/378 ,  H04N5/3745 ,  H04N5/363

Abstract: A photon counting device includes a plurality of pixels each including a photoelectric conversion element configured to convert input light to charge, and an amplifier configured to amplify the charge converted by the photoelectric conversion element and convert the charge to a voltage, an A/D converter configured to convert the voltages output from the amplifiers of the plurality of pixels to digital values; and a conversion unit configured to convert the digital value output from the A/D converter to the number of photons by referring to reference data, for each of the plurality of pixels, and the reference data is created based on a gain and an offset value for each of the plurality of pixels.

公开(公告)号：US20200371261A1

公开(公告)日：2020-11-26

申请号：US16764053

申请日：2018-06-18

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Tadashi MARUNO ,  Eiji TODA ,  Mao NAKAJIMA ,  Teruo TAKAHASHI ,  Takafumi HIGUCHI

IPC: G01T1/24 ,  H04N5/374 ,  H04N5/376

Abstract: A photon counting device includes a plurality of pixels each including a photoelectric conversion element configured to convert input light to charge, and an amplifier configured to amplify the charge converted by the photoelectric conversion element and convert the charge to a voltage, an A/D converter configured to convert the voltage output from the amplifier of each of the plurality of pixels to a digital value and output the digital value, a correction unit configured to correct the digital value output from the A/D converter so that an influence of a variation in a gain and an offset value among the plurality of pixels is curbed, a calculation unit configured to output a summed value obtained by summing the corrected digital values corresponding to at least two pixels, and a conversion unit configured to convert the summed value output from the calculation unit to a number of photons.