Method and device for measuring distances
US6864966B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2003 |
| Grant date | Mar 8, 2005 |
| Priority date | — |
| Expiry date | Mar 16, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/491
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a method for measuring distances, based on the phase measurement of an optical measuring beam that is reflected or scattered by an object, on which the beam is sighted. According to said method, the measurement object is exposed to an optical measuring beam of modulated intensity emitted by a measuring device and is converted into electrical measurement signals. The signals are then compared with a reference signal that is generated from the detection and conversion of a portion of measuring light that has been guided on a known reference trajectory, in order to determine the distance between the measuring device and the measurement objet, based on the phase difference that has been determined. The emitted measuring beam is modulated in bursts and the measurement signal of the receiver is only evaluated during the active burst period. The invention also relates to devices for carrying out said method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.