Independent per-pixel integration registers for LIDAR measurements

    公开(公告)号:US12153133B2

    公开(公告)日:2024-11-26

    申请号:US16396564

    申请日:2019-04-26

    Applicant: Ouster, Inc.

    Abstract: An optical measurement system includes a photosensor that includes one or more photosensitive elements. Each of the photosensitive elements may generate signals when a photon is detected, and the number of photons detected for each photosensor may be accumulated in an integration register. The integration register may accumulate photon counts independent of a parallel data path that stores photon counts in time bins based on photon arrival times to form a histogram representation. The total photon count in the integration register can be used to estimate ambient background light and properly set signal thresholds for detecting reflected light signals represented in the histogram.

    Optical system for collecting distance information within a field

    公开(公告)号:US11627298B2

    公开(公告)日:2023-04-11

    申请号:US17549675

    申请日:2021-12-13

    Applicant: Ouster, Inc.

    Abstract: An optical system for collecting distance information within a field is provided. The optical system may include lenses for collecting photons from a field and may include lenses for distributing photons to a field. The optical system may include lens tubes that collimate collected photons, optical filters that reject normally incident light outside of the operating wavelength, and pixels that detect incident photons. The optical system may further include illumination sources that output photons at an operating wavelength.

    Accurate photo detector measurements for LIDAR

    公开(公告)号:US11209544B2

    公开(公告)日:2021-12-28

    申请号:US17347174

    申请日:2021-06-14

    Applicant: Ouster, Inc.

    Abstract: A light ranging system can include a laser device and an imaging device having photosensors. The laser device illuminates a scene with laser pulse radiation that reflects off of objects in the scene. The reflections can vary greatly depending on the reflecting surface shape and reflectivity. The signal measured by photosensors can be filtered with a number of matched filter designed according to profiles of different reflected signals. A best matched filter can be identified, and hence information about the reflecting surface and accurate ranging information can be obtained. The laser pulse radiation can be emitted in coded pulses by allowing weights to different detection intervals. Other enhancements include staggering laser pulses and changing an operational status of photodetectors of a pixel sensor, as well as efficient signal processing using a sensor chip that includes processing circuits and photosensors.

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