公开(公告)号：US20250016476A1

公开(公告)日：2025-01-09

申请号：US18709973

申请日：2022-11-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takafumi HIGUCHI ,  Katsuhiro NAKAMOTO ,  Teruo TAKAHASHI ,  Mao NAKAJIMA

IPC: H04N25/773 ,  G01J1/44 ,  H04N25/618

Abstract: A threshold value determination method includes a step of calculating a probability distribution of a provisional value for each photon number of a target pixel based on an observation probability for each photoelectron number based on a probability distribution of the photon number and an observation probability for each photoelectron number based on a probability distribution of the photoelectron number accompanying reading noise of the target pixel and a step of calculating threshold value data for sorting the provisional value into a corresponding photon number based on the probability distribution for each photon number.

公开(公告)号：US20250016475A1

公开(公告)日：2025-01-09

申请号：US18709905

申请日：2022-11-10

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takafumi HIGUCHI ,  Teruo TAKAHASHI ,  Mao NAKAJIMA ,  Katsuhiro NAKAMOTO

IPC: H04N25/773 ,  H04N25/616 ,  H04N25/778

Abstract: A photon number resolving system includes: a plurality of pixels of which each includes a photoelectric conversion element and an amplifier for amplifying the electric charges converted by the photoelectric conversion element and converting the electric charges to a voltage; an A/D converter configured to convert a voltage output from the amplifier of each of the plurality of pixels to a digital value; a first deriving unit configured to derive a provisional value of a photon number in each pixel of the plurality of pixels based on the digital value; and a second deriving unit configured to derive a confirmed value of a photon number in a target pixel based on a first probability based on optical shot noise and a second probability based on reading noise.

公开(公告)号：US20240314470A1

公开(公告)日：2024-09-19

申请号：US18275443

申请日：2021-12-24

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Takafumi HIGUCHI ,  Teruo TAKAHASHI ,  Mao NAKAJIMA ,  Katsuhiro NAKAMOTO

IPC: H04N25/773 ,  G01J1/44 ,  H04N25/618

CPC classification number: H04N25/773 ,  G01J1/44 ,  H04N25/618 ,  G01J2001/442

Abstract: A photon counting device includes: a plurality of pixels each including a photoelectric conversion element and an amplifier amplifying charge to which input light is converted by the photoelectric conversion element and converting the amplified charge to a voltage; an A/D converter converting a voltage output from the amplifier of each of the plurality of pixels to a digital value; a first derivation unit configured to derive a provisional value of photon number in each of the plurality of pixels based on the digital value; and a second derivation unit configured to derive a confirmed value of photon number in a target pixel based on a first probability associated with a photon number distribution and a second probability associated with reading noise.

公开(公告)号：US20230324570A1

公开(公告)日：2023-10-12

申请号：US18206806

申请日：2023-06-07

Applicant: HAMAMATSU PHOTONICS K.K.

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

IPC: G01T1/24 ,  H04N25/65 ,  H04N25/74 ,  H04N25/75 ,  H04N25/767 ,  H04N25/772 ,  H04N25/778

CPC classification number: G01T1/247 ,  H04N25/65 ,  H04N25/74 ,  H04N25/75 ,  H04N25/767 ,  H04N25/772 ,  H04N25/778 ,  G01T1/208

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.

公开(公告)号：US20230251392A1

公开(公告)日：2023-08-10

申请号：US18133578

申请日：2023-04-12

Applicant: HAMAMATSU PHOTONICS K.K.

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

IPC: G01T1/24 ,  H04N25/65 ,  H04N25/74 ,  H04N25/75 ,  H04N25/767 ,  H04N25/772 ,  H04N25/778

CPC classification number: G01T1/247 ,  H04N25/65 ,  H04N25/74 ,  H04N25/75 ,  H04N25/767 ,  H04N25/772 ,  H04N25/778 ,  G01T1/208

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：US20220066055A1

公开(公告)日：2022-03-03

申请号：US17501398

申请日：2021-10-14

Applicant: HAMAMATSU PHOTONICS K.K.

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

IPC: G01T1/24 ,  H04N5/3745 ,  H04N5/378 ,  H04N5/374 ,  H04N5/376 ,  H04N5/363 ,  G01T1/208

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.

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.