Laser speed measurement and range finding device
US6100965A · kind A · utility
Assignees
Inventor
Key dates
| Filing date | Apr 1, 1998 |
| Grant date | Aug 8, 2000 |
| Priority date | — |
| Expiry date | Apr 1, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The purpose of this invention is a laser speed measurement and range finding device, with coherent detection comprising: PA1 a microlaser (10) with continuous emission comprising an active laser medium (10) and a microlaser cavity (16, 18), PA1 means (20, 22, 24) for modulating an optical frequency of a beam output by the microlaser, PA1 means (28) of outputting a signal depending on: PA2 firstly, the Doppler frequency ##EQU1## where .lambda. is the microlaser emission wave length and V is the speed of the target (2) to be detected, PA2 secondly, a modulation frequency F.tau. caused by interference in the cavity of the frequency modulated laser oscillation and the signal from a target (2) placed at a distance Z.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.