Patent
1975-05-27
1977-03-08
Stern, Ronald J.
350161S, G02B 518, G02F 119
Patent
active
040110095
ABSTRACT:
Apparatus and method for modulating quasi-monochromatic electromagnetic radiation utilizing a controllable diffraction grating. A reflection diffraction grating is comprised of a material deformable in the presence of an applied electric field. A first electrode, comprised of a flexible radiation-reflecting material, is applied to the first surface of the deformable material, forming a reflecting surface of the diffraction grating. A second electrode is applied to a second surface of the deformable material. The electrodes are arranged to provide a periodic surface distortion on the reflecting electrode upon application of a voltage between the first and the second electrodes, thereby resulting in a blazed diffraction grating. In addition, the blaze angle of the diffraction grating can be varied as a function of applied voltage, and consequently diffracted radiation pattern can be modulated as a function of the applied voltage. The controllable diffraction grating can modulate the diffracted radiation in a digital or in an analog mode of operation.
REFERENCES:
patent: 3158430 (1964-11-01), McNaney
patent: 3861784 (1975-01-01), Torok
patent: 3905683 (1975-09-01), Roach et al.
patent: 3907407 (1975-09-01), Vilkomerson et al.
patent: 3912386 (1975-10-01), Gorog et al.
Bright Clark I.
Lama William L.
Seachman Ned J.
Stern Ronald J.
Xerox Corporation
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