Two-wavelength double heterodyne interferometry using a matched grating technique
| Autor: | Sodnik, Zoran, Fischer, Edgar, Ittner, Thomas, Tiziani, Hans J. |
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| Zdroj: | Applied Optics; August 1991, Vol. 30 Issue: 22 p3139-3144, 6p |
| Abstrakt: | Two-wavelength double heterodyne interferometry is applied for topographic measurements on optically rough target surfaces. A two-wavelength He–Ne laser and a matched grating technique are used to improve system stability and to simplify heterodyne frequency generation. |
| Databáze: | Supplemental Index |
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