Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1980-03-07
1982-05-18
Corbin, John K.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
350162R, 356363, G01B 902
Patent
active
043302114
ABSTRACT:
A method and apparatus for detecting small angular deviations of an input beam which utilizes a pair of diffraction gratings in series, both of which are operating in the Wood's anomaly region. As a result, the output intensity of the doubly diffracted input beam is at a maximum. Any deviation from the Wood's anomaly region by the input beam will substantially reduce the intensity of the output. This intensity variance is detected and utilized as an indication of a small angular deviation of the input beam.
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Palmer et al., "Parallel Diffraction Grating Anomalies", JOSA, vol. 42, No. 4, pp. 269-276, 4/52.
Palmer et al., "Diffraction Grating Anomalies, II, Coarse Gratings", JOSA, vol. 46, No. 1, pp. 50-53, 1/56.
Hessel et al., "A New Theory of Wood's Anomalies on Optical Background Information Gratings", Applied Optics, vol. 4, No. 10, pp. 1275-1297, 10/65.
Erkkila John H.
Gavrielides Athanasios
Peterson Phillip R.
Corbin John K.
Erlich Jacob N.
Koren Matthew W.
Singer Donald J.
The United States of America as represented by the Secretary of
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