Two etalons and monochromator mode selector help calibrate spectrometer in selected laser mode. Technique accurately determines free spectral range of etalon. By establishing number of fringes between two modes, both of which have been calibrated with molecular line standards, one finds free spectral range with error inversely proportional to spectral interval between calibration points. Procedure establishes free spectral range of etalon without prior knowledge of its length or refractive index.
Optical calibrator for TDL spectrometers
NASA Tech Briefs ; 5 , 2
1980-09-01
Sonstige
Keine Angabe
Englisch
NTIS | 1985
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