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High precision laser range sensor
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 2003 |
| Description | The present invention is an improved distance measuring interferometer that includes high speed phase modulators and additional phase meters to generate and analyze multiple heterodyne signal pairs with distinct frequencies. Modulation sidebands with large frequency separation are generated by the high speed electro-optic phase modulators, requiring only a single frequency stable laser source and eliminating the need for a fist laser to be tuned or stabilized relative to a second laser. The combination of signals produced by the modulated sidebands is separated and processed to give the target distance. The resulting metrology apparatus enables a sensor with submicron accuracy or better over a multi- kilometer ambiguity range. |
| File Size | 551621 |
| Page Count | 8 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20030112199 |
| Archival Resource Key | ark:/13960/t78s9pg1k |
| Language | English |
| Publisher Date | 2003-11-11 |
| Access Restriction | Open |
| Subject Keyword | Lasers Modulation Inventions Targets Electro-optics Modulators Distance Measuring Equipment Ambiguity Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
