Doppler velocimeter
US5229830A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 20, 1991 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | May 20, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S17/58
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for detecting the speed information of an object comprises a light source device, a frequency shifting device for shifting the frequency of a light flux from the light source device, a light-flux dividing device for dividing a light-flux whose frequency is divided by the frequency shifting device, one of the divided light fluxes divided by the light-flux dividing device being projected onto an object to be measured and the other light flux being projected in a direction other than that of the one of the light fluxes, a first detection device for detecting light from the object to be measured to which the one of the light fluxes is projected, the light detected by the first detection device having undergone a Doppler shift proportional to the speed of the object to be measured, a second detection device for detecting the other light flux, and a speed information detection device for detecting the speed information of the object to be measured on the basis of the comparison between the detection results of the first and second detection devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.