公开(公告)号：US5237386A

公开(公告)日：1993-08-17

申请号：US761819

申请日：1991-09-20

Applicant: Phillip E. Harley

Inventor： Phillip E. Harley

IPC: G01J1/44 ,  G01J5/06 ,  G01N15/02 ,  G01N21/51 ,  G01N21/53 ,  G01N21/85

CPC classification number: G01N21/8507 ,  G01N21/51 ,  G01J2001/4466 ,  G01J2005/062 ,  G01N2015/0238 ,  G01N21/53 ,  G01N2201/0813

Abstract: Apparatus for detecting particulates (46) within a medium in a chamber (10) comprises a photo-detector (14) which is maintained at a stable low temperature by a Peltier type cooling device (42). Scattered light from the particulate (46) is focused by a spherical lens (34) onto the input face (30) of a rod lens (22). The latter has an optical pitch of 0.5 and transfers the image to its output face (25) whence it passes via a light pipe (18) to the sensitive area (16) of the photo-electric device (14). The rod lens (22) provides an inexpensive means for transferring the light and which provides a thermal barrier. Thus, although the photo-electric device (14) is held at a low temperature, the input face (30) of the rod lens (22) can be held at the temperature of the medium within the chamber (10) and is not subjected to the formation of mist or ice. The lens (34) is mounted by means of a collar ( 28) which is slidable into a position in which the lens (34) focuses the input light into the face (30) of the lens (22), and then secured in this position by ultra-violet-cured adhesive fillets (32, 34).

Abstract translation: PCT No.PCT / GB90 / 00402 Sec。 371日期1991年9月20日 102（e）1991年9月20日PCT 1990年3月16日PCT公布。 WO90 / 11508 PCT公开号 日期：1990年10月4日。用于检测室（10）中的介质内的微粒（46）的装置包括通过珀尔帖型冷却装置（42）保持在稳定低温的光检测器（14）。 来自颗粒（46）的分散的光被球面透镜（34）聚焦到棒状透镜（22）的输入面（30）上。 后者具有0.5的光学间距，并且通过光管（18）将图像传送到其输出面（25）到光电装置（14）的敏感区域（16）。 棒状透镜（22）提供了用于传送光并且提供热障的廉价的装置。 因此，虽然光电装置（14）保持在低温，但是棒状透镜（22）的输入面（30）能够保持在室（10）内的介质的温度，并且不受 形成雾或冰。 透镜（34）借助于可滑动到透镜（34）将输入光聚焦到透镜（22）的表面（30）中的位置的轴环（28）安装，然后固定在该 由紫外线固化的胶片（32,34）定位。

公开(公告)号：US5194727A

公开(公告)日：1993-03-16

申请号：US834287

申请日：1992-02-20

Applicant: Martin Johnson ,  Robin Jones

Inventor： Martin Johnson ,  Robin Jones

IPC: G01J1/42 ,  G01J1/44 ,  G01S7/486

CPC classification number: G01J1/44 ,  G01S7/4861 ,  G01J2001/4466

Abstract: An avalanche photodiode quenching circuit (20) incorporates an avalanche photodiode (APD) (22) and a first comparator (C1) responsive to reduction in APD voltage. The comparator (C1) is arranged to activate an APD quench circuit (38) in response to APD avalanche initiation. The circuit (20) also includes a second comparator (C2) arranged to reset the first comparator input (N2) in response to a further reduction in APD voltage caused by initiation of quenching. The second comparator (C2) is also connected to a monostable circuit (48) arranged to latch the first comparator output response to resetting. The monostable circuit (48) maintains the first comparator output level constant until the APD (22) has recharged.

Abstract translation: PCT No.PCT / GB90 / 01012 Sec。 371日期1992年2月20日 102（e）日期1992年2月20日PCT提交1990年7月2日PCT公布。 出版物WO91 / 00502 日期：1991年1月10日。雪崩光电二极管猝灭电路（20）包含雪崩光电二极管（APD）（22）和响应于APD电压降低的第一比较器（C1）。 比较器（C1）被布置成响应于APD雪崩启动而激活APD骤冷回路（38）。 电路（20）还包括第二比较器（C2），其被配置为响应于由骤冷开始引起的APD电压的进一步降低来复位第一比较器输入（N2）。 第二比较器（C2）也连接到单稳态电路（48），其被布置成将第一比较器输出响应锁存到复位。 单稳态电路（48）保持第一比较器输出电平恒定直到APD（22）再充电。

公开(公告)号：US12078530B2

公开(公告)日：2024-09-03

申请号：US17306281

申请日：2021-05-03

Applicant: Waymo LLC

Inventor： Pierre-Yves Droz ,  David Hutchison

IPC: G01C3/08 ,  G01J1/04 ,  G01S7/481 ,  G01S17/89 ,  G02B6/08 ,  G01J1/44

CPC classification number: G01J1/0407 ,  G01J1/0411 ,  G01J1/0414 ,  G01J1/0425 ,  G01J1/0437 ,  G01S7/4816 ,  G01S7/4818 ,  G01S17/89 ,  G02B6/08 ,  G01J2001/4466

Abstract: The present disclosure relates to limitation of noise on light detectors using an aperture. One example implementation includes a system. The system includes a lens disposed relative to a scene. The lens focuses light from the scene. The system also includes an aperture defined within an opaque material. The system also includes a waveguide having a first side that receives light focused by the lens and transmitted through the aperture. The waveguide guides the received light toward a second side of the waveguide opposite to the first side. The waveguide has a third side extending between the first side and the second side. The system also includes an array of light detectors that intercepts and detects light propagating out of the third side of the waveguide.

公开(公告)号：US20240264309A1

公开(公告)日：2024-08-08

申请号：US18584352

申请日：2024-02-22

Applicant: SONY SEMICONDUCTOR SOLUTIONS CORPORATION

Inventor： TATSUKI NISHINO

IPC: G01S17/89 ,  G01J1/44 ,  H04N25/705

CPC classification number: G01S17/89 ,  G01J1/44 ,  H04N25/705 ,  G01J2001/4466

Abstract: The present technology relates to a light receiving element and a ranging system to reduce power consumption. A light receiving element includes a pixel which includes an SPAD, a first transistor configured to set a cathode voltage of the SPAD at a first negative voltage, a voltage conversion circuit configured to convert the cathode voltage of the SPAD upon incidence of a photon and output the converted cathode voltage, and an output unit configured to output a detection signal indicating the incidence of the photon on the SPAD on the basis of the converted cathode voltage. The present technology is applicable to a ranging system that detects a range in a depth direction to a subject, for example.

公开(公告)号：US12057517B2

公开(公告)日：2024-08-06

申请号：US17993317

申请日：2022-11-23

Applicant: Infineon Technologies Dresden GmbH & Co. KG

Inventor： Henning Feick

IPC: G01J1/44 ,  H01L31/02 ,  H01L31/0224 ,  H01L31/107

CPC classification number: H01L31/107 ,  G01J1/44 ,  H01L31/02027 ,  H01L31/022408 ,  G01J2001/4466

Abstract: A photon avalanche diode includes: first, second, and third diodes formed in a semiconductor body, the second diode being a photodiode; a main cathode terminal connected to the cathode of the first diode; a main anode terminal connected to the anode of the third diode; an auxiliary cathode terminal connected to the cathode of the second and third diodes; and an auxiliary anode terminal connected to the anode of the first and second diodes. The main anode terminal is electrically connected to ground or a reference potential. The main cathode terminal is electrically connected to a voltage which causes a photocarrier multiplication region to form within the semiconductor body. The auxiliary anode terminal is electrically connected to ground or to a read-out circuit. The auxiliary cathode terminal is electrically connected to a constant bias voltage less than a voltage applied to the main cathode terminal.

公开(公告)号：US12007481B2

公开(公告)日：2024-06-11

申请号：US18297875

申请日：2023-04-10

Applicant: Kabushiki Kaisha Toshiba ,  Toshiba Electronic Devices & Storage Corporation

Inventor： Hiroshi Kubota ,  Nobu Matsumoto

IPC: G01S17/10 ,  G01C3/08 ,  G01J1/44

CPC classification number: G01S17/10 ,  G01C3/08 ,  G01J1/44 ,  G01J2001/4466

Abstract: A sensor includes an avalanche photodiode (APD), a first resistor, a second resistor, and a rectification element. The first resistor is connected between a current output terminal of the APD and a first output terminal. The second resistor and the rectification element are connected in series between the current output terminal and a second output terminal. The rectification element is connected between the second resistor and the second output terminal.

公开(公告)号：US20240175748A1

公开(公告)日：2024-05-30

申请号：US18551270

申请日：2022-03-18

Applicant: POLITECNICO DI MILANO

Inventor： Federica Alberta VILLA ,  Franco ZAPPA ,  Fabio SEVERINI ,  Francesca MADONINI ,  Danilo BRONZI

IPC: G01J1/44

CPC classification number: G01J1/44 ,  G01J2001/4466

Abstract: A system and method for detection, localization and signaling of single photon events and of at least two photons time coincidence events. The system includes at least one array of pixels, each of which includes a photodetector and a front-end electronics, which outputs a digital signal; at least one event detection electronics including: a plurality of digital-to-analog transducers, one for each pixel of the array, configured to convert the digital signal coming from the respective pixel in a corresponding analog signal, which is quantized in amplitude and duration; an analog adder node configured to sum the analog signals coming from the digital-to-analog transducers, obtaining a sum analog signal; and an overall analog-to-digital transducer. The system and method are ultimately configured to output a digital signal if an output signal of an analog adder node exceeds, respectively, a first threshold or the second threshold, allowing event detection, within a time window.

公开(公告)号：US11982566B2

公开(公告)日：2024-05-14

申请号：US17442145

申请日：2020-02-28

Applicant: ECOLE POLYTECHNIQUE FEDERALE DE LAUSANNE (EPFL) ,  Yeda Research & Development Co. Ltd.

Inventor： Ivan Michel Antolovic ,  Claudio Bruschini ,  Edoardo Charbon ,  Gur Lubin ,  Ron Tenne ,  Dan Oron ,  Uri Rossman

IPC: G01J1/44 ,  G01J1/42

CPC classification number: G01J1/44 ,  G01J1/4228 ,  G01J2001/442 ,  G01J2001/444 ,  G01J2001/4466

Abstract: A system for photon correlation of an illuminated object and/or a light source is provided. The system includes a light source for illuminating the object and an optical system having an object-facing side configured to face the object or the light source and a projection side with the projection side having a focal plane. The system also includes a single-chip single photon avalanche photodiode (SPAD) array arranged at the focal plane and a timing circuit associated with the single-chip SPAD array for measuring arrival times of photons detected by the single-chip SPAD array.

公开(公告)号：US11976968B2

公开(公告)日：2024-05-07

申请号：US18139426

申请日：2023-04-26

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Soh Uenoyama ,  Takuya Hashimoto

IPC: G01J1/44 ,  G01J1/04

CPC classification number: G01J1/44 ,  G01J1/0411 ,  G01J2001/4466

Abstract: The light detector includes a light detection substrate having at least one light receiving region and a light incident surface on which a detection target light is incident, and a meta-lens including a plurality of unit structures arranged in a grid pattern and disposed on the light incident surface to focus the detection target light. When viewed in a thickness direction of the light detection substrate, an opening region in which no unit structure is formed is provided in a region including a center of the meta-lens.

公开(公告)号：US20240035884A1

公开(公告)日：2024-02-01

申请号：US18226422

申请日：2023-07-26

Applicant: ELMOS SEMICONDUCTOR SE

Inventor： André SROWIG ,  Fabian FINKELDEY

IPC: G01J1/44 ,  G01S7/497

CPC classification number: G01J1/44 ,  G01S7/497 ,  G01J2001/444 ,  G01J2001/4466

Abstract: A light receiver circuit with compensation of propagation times has at least one light sensor, one control circuit, one connecting line to a TDC circuit, and a test circuit. The test line is connected to a test signal source. The test circuit connects the test line to the control circuit and forwards the test signal to the control circuit. The control circuit routes a measurement signal of the light sensor to the TDC circuit and a test signal to the connecting line and to the TDC circuit to evaluate the test signal and propagation time of test signal from test circuit to TDC circuit. The light sensor array further includes a plurality of light receiver circuits of such kind. The invention also relates to a Lidar receiver for capturing optical events with a light sensor array with a TDC circuit and a test signal source and with a timecode generator.