Optical waveguides – Temporal optical modulation within an optical waveguide
Patent
1991-03-22
1992-02-25
Ullah, Akm
Optical waveguides
Temporal optical modulation within an optical waveguide
385 3, 385 4, G02B 610, G02B 612
Patent
active
050919792
ABSTRACT:
Imaging at sub-micron dimensions--at dimensions ordinarily thought to approximate those within diffraction limitations of the chosen imaging radiation--is expedited by use of a new category of phase masks. The new mask structure provides for phase shifting by use of waveguides. Waveguides of such dimensions, material, and spacing as to accommodate image resolution impairment, may consist of filled or unfilled apertures or of protuberances, all of constant length equal to the thickness of the mask layer in which constructed.
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AT&T Bell Laboratories
Indig George S.
Ullah Akm
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