| Autor: | D Roviras, Marc Lescure, T Bosch |
|---|---|
| Rok vydání: | 1992 |
| Předmět: | |
| Zdroj: | Journal of Optics. 23:117-123 |
| ISSN: | 0150-536X |
| DOI: | 10.1088/0150-536x/23/3/005 |
| Popis: | The authors review the recent progress in dynamic interferometry applied to optical distance measurement devices. These techniques are based on modulating laser diodes to obtain a continuous wavelength-shift. Measurements can be done by a fringe counting technique or by detecting the beat frequency that is proportional to the time-of-flight. This paper shows too the importance of the spectral analysis of the photodetected signal. A signal processing allows the use of multiple-beam interferometers with multiple reflectors. It's also possible to determine absolute distances with rough targets from the ratio of the amplitudes of two harmonics. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|