Optical modulation element and projection apparatus

Details Optical modulation element and projection apparatus Optical modulation element and projection apparatus

2006-04-11

2006-04-11

Thompson, Tim (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S292000, C359S298000, C359S280000

Reexamination Certificate

active

07027201

ABSTRACT:
An optical modulation element is capable of forming a reflective diffraction grating in which heights of a plurality of elements each having a reflecting surface periodically change. The reflecting surfaces of at least one of the plurality of elements are driven in a direction of height by piezoelectric elements. The plurality of elements each having the surface as the reflecting surface are two-dimensionally arrayed by juxtaposing long sides. A rear surface side of an effective reflecting portion of each of the elements is fixed to the piezoelectric element.

REFERENCES:
patent: 5490009 (1996-02-01), Venkateswar et al.
patent: 6285489 (2001-09-01), Helsel et al.
patent: 6438282 (2002-08-01), Takeda et al.
patent: 6585379 (2003-07-01), Yokoyama et al.
patent: 2-254405 (1990-10-01), None
patent: 1999-008170 (1999-01-01), None
patent: WO97/31283 (1997-08-01), None
Office Action from Korean Patent Office dated Nov. 23, 2002 (Japanese and Korean version).
Abstract for JPLO 2-254405 (English version).
Abstract for 1999-008170 (English version).

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