Physics – Optics
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apopt..17.2280p&link_type=abstract
Applied Optics, vol. 17, Aug. 1, 1978, p. 2280-2290. NSF-supported research.
Physics
Optics
3
Automatic Test Equipment, Computer Techniques, High Resolution, Instrument Errors, Optical Emission Spectroscopy, Spectral Resolution, Comparator Circuits, Data Acquisition, Gratings (Spectra), Line Spectra, Minicomputers
Scientific paper
A fully automatic comparator has been designed and implemented to determine precision wavelengths from high-resolution spectrograms. The system consists of a comparator, slightly modified for simultaneous data acquisition from two parallel scans of the spectrogram, interfaced to a minicomputer. The control software embodies three innovations of special interest: (1) data acquired from two parallel scans are compared and used to separate unknown from standard lines, to eliminate spurious lines, to indentify blends of unknown with standard lines, to improve the accuracy of the measured positions, and to flag lines which require special examination; (2) two classes of lines are automatically recognized and appropriate line finding methods are applied to each; and (3) wavelength determination using a least-squares-fitted grating equation is supported in addition to polynomial interpolation.
Andrew K. L.
Palmer Byron A.
Sansonetti Craig J.
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