Invention Grant
- Patent Title: Method and device for optical distance measurement
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Application No.: US16744430Application Date: 2020-01-16
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Publication No.: US11644550B2Publication Date: 2023-05-09
- Inventor: Wolfgang Birnbacher
- Applicant: Ibeo Automotive Systems GmbH
- Applicant Address: DE Hamburg
- Assignee: Microvision, Inc.
- Current Assignee: Microvision, Inc.
- Current Assignee Address: US WA Redmond
- Priority: EP 152055 2019.01.16
- Main IPC: G01S7/4865
- IPC: G01S7/4865 ; G01S7/4861 ; G01S17/08

Abstract:
A method for optical distance measurement is suggested, wherein a first distribution of times-of-flight of light of detected photons of transmitted measurement pulses is determined, which is stored in a first memory area of a memory unit. The first distribution of times-of-flight of light is assigned to time intervals of a first plurality of time intervals and frequency portions of the first distribution above a predetermined cut-off frequency are reduced or suppressed by means of a low pass filter in a reduction step, so that a second distribution of times-of-flight of light is generated. The second distribution is assigned to time intervals of a second plurality of time intervals and the blocking frequency of the low pass filter is selected to be smaller than or equal to half of the reciprocal value of a smallest interval width of the second plurality of time intervals.
Public/Granted literature
- US20200225333A1 METHOD AND DEVICE FOR OPTICAL DISTANCE MEASUREMENT Public/Granted day:2020-07-16
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