Optics: measuring and testing – By particle light scattering – With photocell detection
Patent
1982-09-13
1984-11-06
Evans, F. L.
Optics: measuring and testing
By particle light scattering
With photocell detection
356352, G01B 902
Patent
active
044809140
ABSTRACT:
An interferometer mirror drive system compensates for velocity and tilt errors induced by ambient vibration, as well as providing long-term automatic alignment of the mirrors. A uniquely configured .lambda./8-thick step on the fixed mirror of the interferometer introduces a 90-degree phase shift in one of two reference light beams, to produce quadrature signals which characterize the relative motion between the fixed and the driven mirrors. An electronic circuit extracts velocity and tilt data from the quadrature signals and develops error signals indicative of deviations from the desired coordinates of the moving mirror. The error signals are used to generate a set of control signals which in turn are supplied to an arrangement of drive coils attached to the moving mirror, to restore the mirror to the desired coordinates.
REFERENCES:
patent: 3488123 (1970-01-01), Nichols
patent: 3634682 (1972-01-01), Gold
patent: 4053231 (1977-10-01), Fletcher et al.
patent: 4084907 (1978-04-01), Pinard et al.
patent: 4149118 (1979-04-01), Winterling et al.
patent: 4444501 (1984-04-01), Schwiesow
Kemp et al., "Rocket-Borne Cryogenic Interferometer Spectrometer used for an Artificial Auroral Measurement", Proc. SPIE, vol. 245, pp. 34-42, 1980.
"Interferometer Design and Data Handling in a High-Vibration Environment-Part I Interferometer Design", by R. P. Walker & J. D. Rex, in SPIE, vol. 191 (Multiplex and/or High-Throughput Spectroscopy) (1979), p. 88.
"Aspheric Surface Calibrator", by Ian Powell, in Applied Optics, vol. 20, No. 19, Oct. 1, 1981, p. 3367.
Karas Edwin L.
Root Ernest F.
Schlyter Fredrik
Thompson Duane T.
Evans F. L.
Koren Matthew W.
Martin Terrence
Paglierani Ronald J.
The Foxboro Company
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