Optical: systems and elements – Optical modulator – Light wave directional modulation
Reexamination Certificate
2006-02-07
2006-02-07
Epps, Georgia (Department: 2873)
Optical: systems and elements
Optical modulator
Light wave directional modulation
C359S253000, C349S113000
Reexamination Certificate
active
06995898
ABSTRACT:
A substrate is provided with a light reflecting film in which the depths of a plurality of concave portions formed on the surface of the base or the heights of a plurality of convex portions formed on the surface of the base are substantially equal, the planar shapes of the plurality of concave portions or the convex portions are overlapped circles and overlapped polygons, or any one of the aforesaid circles and polygons, and a plurality of concave portions or convex portions are randomly arranged over a plane, the substrate with the light reflecting film being prepared by using a mask comprising light-transmitting parts or non-light-transmitting parts formed by a plurality of dots less than the number of the dot regions as one unit, in which the light-transmitting parts or the non-light-transmitting parts are randomly arranged in the unit, and a plurality of the one unit is repeated.
REFERENCES:
patent: 5940154 (1999-08-01), Ukita et al.
patent: 2002/0041350 (2002-04-01), Yamazaki et al.
patent: 08-152621 (1996-06-01), None
patent: 11-281972 (1999-10-01), None
patent: 2002-006774 (2002-01-01), None
patent: 2002-072184 (2002-03-01), None
Communication from Japanese Patent Office re: counterpart application.
Matsuo Mutsumi
Otake Toshihiro
Tsuyuki Tadashi
Epps Georgia
Seiko Epson Corporation
Tra Tuyen
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