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Array of waveguide diffusers for light detection using an aperture

A photodetector array and photodetector technology, applied in the direction of optical waveguide light guide, light guide, utilization of re-radiation, etc., can solve the problem of affecting and affecting the measurement of photodetectors

Active Publication Date: 2019-07-19
WAYMO LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this may also lead to the arrangement described above being disproportionately affected by adverse background effects (e.g. extraneous light from external sources may affect the photodetector measurements)

Method used

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  • Array of waveguide diffusers for light detection using an aperture
  • Array of waveguide diffusers for light detection using an aperture
  • Array of waveguide diffusers for light detection using an aperture

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Embodiment Construction

[0017] Any exemplary embodiment or feature described herein is not necessarily to be construed as preferred or advantageous over other embodiments or features. The example embodiments described here are not meant to be limiting. It should be readily appreciated that certain aspects of the disclosed embodiments can be arranged and combined in many different configurations. Furthermore, the particular arrangements shown in the figures should not be considered limiting. It should be understood that other embodiments may include more or less of each element shown in a given figure. Furthermore, some of the elements shown may be combined or omitted. Similarly, example embodiments may include elements not shown in the figures.

[0018] I. Overview

[0019] Example implementations may relate to devices, systems, and methods for reducing background light applied to a photodetector array. Light detectors in the array can sense light from the scene. For example, the light detector...

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PUM

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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 that focuses light from a scene toward a focal plane. The system also includes an aperture defined within an opaque material. The system also includes a plurality of waveguides. A given waveguide of the plurality has an input end thatreceives a portion of light transmitted through the aperture, and guides the received portion toward an output end of the given waveguide. A cross-sectional area of the guided portion at the output end is greater than a cross-sectional area of the received portion at the input end. The system also includes an array of light detectors that detects the guided light transmitted through the output end.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Patent Application No. 15 / 366,746, filed December 1, 2016, the entire contents of which are hereby incorporated by reference. Background technique [0003] Unless otherwise indicated herein, the materials described in this section are not prior art to the claims in this application and are not admitted to be prior art by inclusion in this section. [0004] Photodetectors such as photodiodes, single photon avalanche diodes (SPADs), or other types of avalanche photodiodes (APDs) can be used to detect light applied to their surfaces (e.g., by outputting electrical signal such as voltage or current corresponding to light intensity). Many types of such devices are made from semiconductor materials such as silicon. In order to detect light over a very large geometric area, multiple photodetectors can be arranged in an array connected in parallel. These arrays are sometimes called silic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/04F21V8/00G02B6/02G01S17/02G01S7/4863G01S7/4865G01S17/00G01S17/89G01S17/931
CPCG01S7/4817G01S7/4816G01S7/4813G01S7/4818G01S7/4865G01S7/4863G01S17/89G01S17/931G01S17/02G01J1/0407G02B5/003G02B5/005G02B6/08G02B27/0994G02B6/02042G02B6/0076G02B19/0076G02B19/0014G01S17/00
Inventor P-y.德罗兹D.哈奇森
Owner WAYMO LLC
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