Method and device of measuring the distance to an object
US10802144B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2016 |
| Grant date | Oct 13, 2020 |
| Priority date | — |
| Expiry date | Aug 15, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C3/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring the distance to an object by radiating a periodic amplitude-modulated optical signal to the object and detecting the phase difference between the radiated optical signal and a reflected optical signal from the object includes: generating a first photo-detection control signal to control the periodic amplitude-modulation of the radiated optical signal; generating a mask signal activated at least during a shuttering duration for resetting the voltage level at a sensing node; and generating a second photo-detection control signal based on Boolean combination of the first photo-detection signal and the mask signal such that the second photo-detection signal is deactivated or masked at least during the shuttering duration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.