Adjustable liquid crystal blazed grating deflector

Details Adjustable liquid crystal blazed grating deflector Adjustable liquid crystal blazed grating deflector

2001-03-27

2003-07-01

Ton, Toan (Department: 2871)

Liquid crystal cells, elements and systems

Liquid crystal optical element

Liquid crystal diffraction element

Reexamination Certificate

active

06587180

ABSTRACT:

BACKGROUND
Gratings can be used for many purposes, including as optical filters. A grating can be formed as a hologram on a substrate. Light which matches the grating is then deflected in a specified way.
Many optical applications such as optical networking, optical switching, projection displays, optical data storage and optical holographic applications, may need to steer an optical beam in a desired direction.
SUMMARY
The present application teaches forming a plurality of stacked adjustable gratings which can be used for beam steering.


REFERENCES:
patent: 4850681 (1989-07-01), Yamanobe et al.
patent: 4850682 (1989-07-01), Gerritsen
patent: 5013141 (1991-05-01), Sakata
patent: 5615029 (1997-03-01), Moddel et al.
patent: 6014197 (2000-01-01), Hikmet
patent: 6172792 (2001-01-01), Jepsen et al.

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