公开(公告)号：US20230288540A1

公开(公告)日：2023-09-14

申请号：US17653881

申请日：2022-03-08

Applicant: Allegro MicroSystems, LLC

Inventor： Sean Keuleyan ,  Andrew S. Huntington ,  Nanditha Dissanayake ,  Chao Yi ,  George Williams

IPC: G01S7/481 ,  G01S17/10 ,  G01S7/484 ,  G01S7/4865

CPC classification number: G01S7/4816 ,  G01S7/4814 ,  G01S17/10 ,  G01S7/484 ,  G01S7/4865

Abstract: Methods and apparatus for a sensor having a photodetector array having photodetectors comprising a colloidal quantum dot (CQD) structure formed on an integrated circuit. The sensor may comprise a LIDAR time of flight sensor.

公开(公告)号：US20230228851A1

公开(公告)日：2023-07-20

申请号：US17566763

申请日：2021-12-31

Applicant: Allegro MicroSystems, LLC

Inventor： Andrew S. Huntington ,  Bryan Cadugan

IPC: G01S7/481 ,  G02B3/00 ,  G02B5/18

CPC classification number: G01S7/4814 ,  G01S7/4816 ,  G01S7/4817 ,  G02B3/0087 ,  G02B5/18

Abstract: Lidar transmission optics and systems project more laser pulse energy per pixel instantaneous field-of-view (IFOV) to a portion of a sensor field of view (FOV), e.g., a portion that would be expected to have both close and distant objects of interest, and proportionally less pulse energy per pixel IFOV to other portions of the sensor FOV, e.g., those that would be expected to have or see only close objects of interest. Optics such as diffractive optical elements (DOEs), gradient-index (GRIN) lenses, and/or compound lens systems can be used for producing desired irradiance distributions having multiple parts or regions. The optics and systems improve range performance by providing for more efficient use of the total available laser pulse energy than transmit optics that project uniform pulse energy per pixel IFOV across the sensor FOV.

公开(公告)号：US20230017207A1

公开(公告)日：2023-01-19

申请号：US17376607

申请日：2021-07-15

Applicant: Allegro MicroSystems, LLC

Inventor： Logan G. Stewart ,  Andrew S. Huntington ,  William P. Taylor

IPC: H01L27/146

Abstract: A method includes forming a plurality of identical arrays on a semiconductor wafer, each array having a plurality of detectors, screening each of the plurality of arrays to determine an operational status of each of the plurality of arrays, and selecting one of the plurality of arrays for use based on the determination of the operational status of the plurality of arrays. Also described is a focal plane array including a circuit having a plurality of electrical contacts and a die including a plurality of identical arrays, each including a plurality of detectors. The plurality of identical arrays includes at least one selected array that is fully functional and at least one non-selected array that is not fully functional and the selected array is positioned with respect to the circuit so that the detectors of the selected array contact the plurality of electrical contacts of the circuit.

公开(公告)号：US20250044422A1

公开(公告)日：2025-02-06

申请号：US18362218

申请日：2023-07-31

Applicant: Allegro MicroSystems, LLC

Inventor： Andrew S. Huntington ,  Adam Lee ,  Michael James Munroe ,  Ronald Talaga

IPC: G01S7/4863 ,  G01S7/481 ,  G01S7/486 ,  G01S7/4865

Abstract: Split-detector lidar photoreceivers are described which utilize range-dependent focus to transition from illuminating two detector elements with returns from near targets, within a close-range threshold distance, to illuminating just one detector element for all other returns. In some examples, a split-detector can have or include a “bullseye” (concentric) detector configuration. Because two separate detector elements with separate amplifier chains are used, one channel can be optimized for the strong to and near-target returns, while another channel can be optimized and used for all other returns.

公开(公告)号：US11600654B2

公开(公告)日：2023-03-07

申请号：US17376607

申请日：2021-07-15

Applicant: Allegro MicroSystems, LLC

Inventor： Logan G. Stewart ,  Andrew S. Huntington ,  William P. Taylor

IPC: H01L27/146

Abstract: A method includes forming a plurality of identical arrays on a semiconductor wafer, each array having a plurality of detectors, screening each of the plurality of arrays to determine an operational status of each of the plurality of arrays, and selecting one of the plurality of arrays for use based on the determination of the operational status of the plurality of arrays. Also described is a focal plane array including a circuit having a plurality of electrical contacts and a die including a plurality of identical arrays, each including a plurality of detectors. The plurality of identical arrays includes at least one selected array that is fully functional and at least one non-selected array that is not fully functional and the selected array is positioned with respect to the circuit so that the detectors of the selected array contact the plurality of electrical contacts of the circuit.

公开(公告)号：US11585910B1

公开(公告)日：2023-02-21

申请号：US17402065

申请日：2021-08-13

Applicant: Allegro MicroSystems, LLC

Inventor： Adam Lee ,  Andrew S. Huntington ,  Charles Myers ,  Shunming Sun

IPC: G01S7/48 ,  G01S7/497 ,  G01S17/894 ,  G01S7/4863

Abstract: Methods and apparatus for nonuniformity correction (NUC) for a sensor having an avalanche photodiode (APD) array and an integrated circuit. The sensor can include anode bias control module, a passive mode module, and an active mode module. DC photocurrent from the APD array can be measured and used for controlling an anode reverse bias voltage to each element in the APD to achieve a nonuniformity correction level less than a selected threshold.

公开(公告)号：US20230333216A1

公开(公告)日：2023-10-19

申请号：US17659033

申请日：2022-04-13

Applicant: Allegro MicroSystems, LLC

Inventor： Bryan Cadugan ,  Andrew S. Huntington ,  Sapna S. Mukherjee ,  Adam Lee ,  George Williams ,  Richard Migliaccio ,  William P. Taylor

IPC: G01S7/4863 ,  G01S17/894 ,  G02B5/02 ,  G01S7/481 ,  G02B1/10 ,  G01S7/4865

CPC classification number: G01S7/4863 ,  G01S7/4816 ,  G01S7/4865 ,  G01S17/894 ,  G02B1/10 ,  G02B5/0273

Abstract: Methods and apparatus for photodetection having parallax compensation for near and far object signal return. In embodiment, a photoreceiver comprising a at least one light-sensitive pixel to transduce light to electrical signals has at least a first one of the pixels including a first subpixel region having a first light response characteristic and a second subpixel region having a second light response characteristic, wherein the first and second light characteristics are configured to correspond to variations in intensity of reflected light from objects at different distances when the portion of the reflected light reaching the first one of the pixels imaged onto the first and second subpixel regions.

公开(公告)号：US20230333213A1

公开(公告)日：2023-10-19

申请号：US17659035

申请日：2022-04-13

Applicant: Allegro MicroSystems, LLC

Inventor： Bryan Cadugan ,  Andrew S. Huntington ,  Sapna S. Mukherjee ,  Adam Lee ,  George Williams ,  Richard Migliaccio ,  William P. Taylor

IPC: G01S7/481 ,  G02B27/00 ,  G01S17/10 ,  G01S7/4863

CPC classification number: G01S7/4816 ,  G02B27/0025 ,  G01S17/10 ,  G01S7/4863 ,  G02B5/02

Abstract: Methods and apparatus for a system including an optic to receive light from near objects and far objects and a photoreceiver optically coupled to the optic, the photoreceiver including a photodetector array. A light scattering structure is positioned a distance from the photodetector array to compensate for parallax effects for the received energy from the near objects and the far objects. The light scattering structure is configured to scatter light onto pixels of the photodetector array.

公开(公告)号：US20230050920A1

公开(公告)日：2023-02-16

申请号：US17402065

申请日：2021-08-13

Applicant: Allegro MicroSystems, LLC

Inventor： Adam Lee ,  Andrew S. Huntington ,  Charles Myers ,  Shunming Sun

IPC: G01S7/497 ,  G01S7/4863 ,  G01S17/894

Abstract: Methods and apparatus for nonuniformity correction (NUC) for a sensor having an avalanche photodiode (APD) array and an integrated circuit. The sensor can include anode bias control module, a passive mode module, and an active mode module. DC photocurrent from the APD array can be measured and used for controlling an anode reverse bias voltage to each element in the APD to achieve a nonuniformity correction level less than a selected threshold.

公开(公告)号：US11252359B1

公开(公告)日：2022-02-15

申请号：US17352829

申请日：2021-06-21

Applicant: Allegro MicroSystems, LLC

Inventor： Andrew S. Huntington ,  William P. Taylor

IPC: H04N5/367 ,  H04N5/232

Abstract: Methods and apparatus for compensating for bad pixels in a sensor array. In embodiments, a detector system receives an image on a sensor array of pixels for a first frame via a lens when the lens and the sensor array are configured in a first positional relationship. The array includes at least one bad pixel. The system moves the lens and/or the sensor array based on a position of the at least one bad pixel in the image such that the lens and the sensor array are configured in a second positional relationship. The image on the sensor array for a second frame is received via the lens when the lens and the sensor array are configured in a second positional relationship. The system compensates for the location of the at least one bad pixel in the image for the first and second frames to output a processed image.