Optical: systems and elements – Diffraction – From grating
Reexamination Certificate
2006-09-19
2006-09-19
Boutsikaris, Leonidas (Department: 2872)
Optical: systems and elements
Diffraction
From grating
C359S566000, C359S573000, C359S575000, C369S112070
Reexamination Certificate
active
07110180
ABSTRACT:
A diffraction grating with periodically arranged protrusions and grooves at a relatively narrow pitch and improved diffraction efficiency is disclosed. The protrusions of the grating are made of a material whose index of refraction is greater than that of the grooves, and the ratio of the width D of the protrusion to the pitch Λ of the protrusion is set equal to or less than 0.4 (D/Λ≦0.4).
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Kawasaki Toshiyuki
Mori Koji
Oohchida Shigeru
Suzudo Tsuyoshi
Boutsikaris Leonidas
Dickstein & Shapiro LLP
Ricoh & Company, Ltd.
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