公开(公告)号：US11770598B1

公开(公告)日：2023-09-26

申请号：US16706464

申请日：2019-12-06

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Rui Zhang ,  Markus Stefan Duelli ,  Umer Shahid ,  Baomin Wang ,  Prafulla Masalkar

IPC: H04N5/225 ,  F21V14/06 ,  G03B15/06 ,  G02B27/28 ,  G02B5/30 ,  G03B15/05 ,  H04N23/56 ,  G06V40/10

CPC classification number: H04N23/56 ,  F21V14/06 ,  G02B5/3033 ,  G02B27/281 ,  G03B15/05 ,  G03B15/06 ,  G06V40/107

Abstract: A device for providing even illumination to a user’s hand or other object to acquire images of the object for biometric identification of a user, includes a camera, a first light module positioned on a first side of the camera, and a second light module positioned on a second side of the camera. The camera is positioned closer to the second light module. The second light module emits light with a lesser intensity than the first light module. Light bending films positioned adjacent to the light modules redirect emitted light toward opposite edges of the field of view of the camera. Diffusers in the path of the emitted light diffuse portions of the emitted light along the edges of the field of view. Polarizers positioned in the path of the emitted light polarize the emitted light to facilitate visualization of particular features of the hand or other object.

公开(公告)号：US12032079B1

公开(公告)日：2024-07-09

申请号：US17114923

申请日：2020-12-08

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Rui Zhang ,  Jeff Clark Adams ,  Markus Stefan Duelli ,  Donald Mitchell Cornwell ,  Prafulla Masalkar

IPC: G01S3/78 ,  G01S3/785 ,  G01S3/789 ,  H04B10/40

CPC classification number: G01S3/785 ,  G01S3/789 ,  H04B10/40

Abstract: An optical detector system provides positioning data to facilitate tracking in optical communications. The system provides first and second path lengths to direct light onto an array of photodetectors. Incoming first light with a first polarization is reflected by a polarizing beam splitter (PBS) to the array, resulting in a first path length and a relatively wide field of view (FOV). Incoming second light with a second polarization passes through the PBS, interacts with a first quarter wave retarder (QWR) and a convex mirror, is reflected by the PBS, passes through a second QWR and is reflected by a flat mirror to pass through the PBS again and onto the array. The second light experiences a second path length greater than the first path length, exhibiting a relatively narrow FOV. The resulting spots of light on the array provide information about a position of the incoming beam.

公开(公告)号：US11579014B1

公开(公告)日：2023-02-14

申请号：US16998849

申请日：2020-08-20

Applicant: AMAZON TECHNOLOGIES, INC.

Inventor： Rui Zhang ,  Jeff Clark Adams ,  Markus Stefan Duelli ,  Donald Mitchell Cornwell ,  Prafulla Masalkar

IPC: G01J1/42 ,  H04B10/66 ,  G01B11/00 ,  H04B17/27 ,  G01S17/66 ,  G01S3/781 ,  G01J1/02 ,  G01B11/26 ,  G02B27/10

Abstract: An optical detector system provides beam positioning data to an optical tracking system to facilitate optical communications. The optical detector system comprises a plurality of optical photodetectors. For example, a two-by-two array may be used. Incoming light passes through one or more optical elements, such as a lens and a dispersive optical element. A first portion of the beam entering the optical elements is directed into a first spot having a first area on the array. A second portion of the beam entering the optical elements is dispersed to form a second spot having a second area on the array that is larger than the first area. This combination of first portion and second portion of the beam incident on the array provides unambiguous information in the output of the photodetectors that is indicative of a position of the incoming beam with respect to the array.