Method and device for optically measuring distance
US7224444B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 2003 |
| Grant date | May 29, 2007 |
| Priority date | — |
| Expiry date | Jan 16, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/4912
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for optical distance measurement, in which a transmitter of a transmission branch (14), which branch is integrated with a measuring device (10), transmits a modulated measurement beam (16, 36) in the direction of a target object (20), and the measurement beam (17, 44) reflected or scattered by the target object (20) is detected by a measurement receiver (54) integrated with the measuring device (10) and is transformed by a frequency mixing process into a low-frequency range.According to the invention, for detection and frequency transformation of the returning measurement signal (17, 44), a measuring diode (62) whose cathode voltage and anode voltage are modulated with high frequency to generate a mixing signal is used.An apparatus (10) is also proposed for performing the method of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.