Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2009-07-02
2011-10-18
Klimowicz, Will J (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112020, C359S489070, C359S489150, C359S492010
Reexamination Certificate
active
08040781
ABSTRACT:
An optical rotating plate has an optical rotating material layer. A phase plate is provided on a first surface side of the optical rotating plate and has at least one birefringent material layer. The first surface side is disposed toward an emitting side of an optical path, thereby giving different phase differences to a first linearly polarized light group containing at least a linearly polarized light having a first wavelength and a second linearly polarized light group containing at least a linearly polarized light having a second wavelength which is different from the first wavelength.
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English Machine Translation of JP 10-293317 A (Yokoo et al., Optical Rotating Dispersion Element, Nov. 4, 1998).
Koyanagi Atsushi
Miyasaka Koji
Sato Hiromasa
Tao Yukihiro
Asahi Glass Company Limited
Fischer Mark
Klimowicz Will J
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
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