Optical: systems and elements – Optical modulator – Light wave temporal modulation
Patent
1994-06-24
1995-12-05
Hellner, Mark
Optical: systems and elements
Optical modulator
Light wave temporal modulation
359251, 359484, G02F 101
Patent
active
054734657
ABSTRACT:
The device of the present invention for an optical rotator and a half-waveplate rotator comprises a retarder or polarization modulator interposed between two crossed or parallel quarter-wave plates, depending on being used as optical rotator or half-waveplate rotator, oriented such that the fast or slow axis of the retarder or modulator is at angle of 45.degree. relative to fast or slow axes of the quarter-wave plates. The rotation angle of the optical rotator and half-waveplate rotator is equal to one-half the retardance of the retarder or modulator and electrically adjustable when using a polarization modulator.
REFERENCES:
patent: 3438878 (1976-02-01), Fox
patent: 4331891 (1982-05-01), Rizzo
patent: 4919522 (1990-04-01), Nelson
patent: 5187603 (1993-02-01), Box
Polarized Light In Optics And Spectroscopy, David S. Kliger, et al. pp. 281-285.
Ellipsometry and Polarized Light, R. M. A. Azzam et al. (North Holland New York 1988) pp. 76-77.
Polarized Light and Optical Measurement, D. Clarke et al. (Pergamon Press, Oxford, 1971) pp. 76-87.
Modulation And Switching Of Light In Dieletric Waveguides, T. Tamir et al. (Springer-Veriag, Berlin, 1975) pp. 152-155, 164-167, 192-195.
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