The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2006
Filed:
Sep. 12, 2003
Katsunori Kawano, Ashigarakami-gun, JP;
Jiro Minabe, Ashigarakami-gun, JP;
Tatsuya Maruyama, Ashigarakami-gun, JP;
Shin Yasuda, Ashigarakami-gun, JP;
Norie Matsui, Ashigarakami-gun, JP;
Tsutomu Ishii, Ebina, JP;
Kazuhiro Hama, Ebina, JP;
Katsunori Kawano, Ashigarakami-gun, JP;
Jiro Minabe, Ashigarakami-gun, JP;
Tatsuya Maruyama, Ashigarakami-gun, JP;
Shin Yasuda, Ashigarakami-gun, JP;
Norie Matsui, Ashigarakami-gun, JP;
Tsutomu Ishii, Ebina, JP;
Kazuhiro Hama, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An optical recording/reproducing apparatus having excellent resistance against vibration and noise is provided. In recording, coherent light is polarization-modulated with a spatial light modulator to generate signal light and reference light whose polarization directions are crossed at right angles with each other. The signal light permeates a polarizing beam splitter, and is incident to a quarter wavelength plate. The reference light passes through a passing hole, is diffused by a light diffuser and is incident to the quarter wavelength plate. The reference and signal light are converted into circularly polarized light which revolve in directions opposite to each other and condensed by a condenser lens, and then a predetermined area of an optical recording medium is irradiated with the reference and signal light. Thus, the reference and signal light are generated by modulating the incident light from the same light source and are coaxially incident to the polarizing beam splitter.