Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Reexamination Certificate
2007-11-20
2007-11-20
Korzuch, William R. (Department: 2627)
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
C369S112010, C369S112050, C369S112030
Reexamination Certificate
active
10874388
ABSTRACT:
An optical recording media objective lens is disclosed for converging either of two working lights of a first wavelength or a second wavelength. The working light of the first wavelength is converged at a first numerical aperture onto the first optical recording medium and the working light of the second wavelength is converged at a second numerical aperture onto the second optical recording medium. An aperture adjusting zonal part is included on at least one of the objective lens surfaces for apparently eliminating light at the periphery of a light flux having a wavelength λ1while maintaining light at the periphery of a light flux having a wavelength λ2, where λ1is one of the first and second wavelengths and λ2is the other wavelength. The aperture adjusting zonal part is formed so as to satisfy two conditions.
REFERENCES:
patent: 2002/0089764 (2002-07-01), Ikenaka et al.
patent: 2003/0151996 (2003-08-01), Hendriks et al.
patent: 2003/0223124 (2003-12-01), Kitahara et al.
patent: H09-145994 (1997-06-01), None
patent: H09-145995 (1997-06-01), None
patent: H09-197108 (1997-07-01), None
Katsuma Toshiaki
Kitahara Yu
Ori Tetsuya
Arnold Bruce Y.
Arnold International
Fujinon Corporation
Haley Joseph R.
Korzuch William R.
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