Dynamic optical devices

Details Dynamic optical devices Dynamic optical devices

2001-06-17

2008-12-02

Chang, Audrey Y (Department: 2872)

Optical: systems and elements

Diffraction

From grating

C359S578000, C359S569000, C356S329000

Reexamination Certificate

active

07460302

ABSTRACT:
The invention provides an optical device, including a light-transmissive substrate, and a pair of different, parallel gratings including a first grating and a second grating, located on the substrate at a constant distance from each other, each of the pair of parallel gratings including at least one sequence of a plurality of parallel lines, wherein the spacings between the lines gradually increase from one edge of the grating up to a maximum distance between the lines, and wherein the arrangement of lines in the second grating is in the same direction as that of the first grating. A system utilizing a plurality of such optical devices is also disclosed.

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