Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2006-11-14
2006-11-14
Assaf, Fayez G. (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S569000, C359S565000
Reexamination Certificate
active
07136227
ABSTRACT:
A dynamically variable, amplitude grating based diffractive optic including: a substantially transmissive, elastic substrate; a substantially opaque, elastic material formed in a predetermined pattern on the first surface of the elastic substrate; and a substrate mount coupled to the elastic substrate to hold it under tension. The predetermined pattern of the substantially opaque, elastic material substrate forms an amplitude grating on the elastic substrate. The substrate mount includes a variable tensioner to stretch the elastic substrate and the substantially opaque, elastic material, thereby allowing at least one optical property of the amplitude grating to be dynamically varied. Alternatively, the elastic substrate may include at least one substantially transparent portion and at least one substantially opaque portion, the substantially opaque portion(s) arranged in a predetermined pattern to form the amplitude grating within the elastic substrate rather than on its surface.
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patent: 5360973 (1994-11-01), Webb
patent: 2003/0107789 (2003-06-01), Hishioka
patent: 2005/0117223 (2005-06-01), Bi
patent: 0 688 062 (2001-07-01), None
patent: 11027035 (1999-01-01), None
patent: WO 88/10521 (1988-12-01), None
patent: WO 90/07199 (1990-06-01), None
Assaf Fayez G.
RatnerPrestia
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