Objective lens for optical pickup

Details Objective lens for optical pickup Objective lens for optical pickup

2007-05-29

2007-05-29

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112130, C369S112260

Reexamination Certificate

active

10430212

ABSTRACT:
An objective lens for an optical pickup is configured such that, when a light beam having a wavelength corresponding to the optical disc requiring the higher NA is converged on the optical disc requiring the higher NA at the higher NA, the phase of light flux passed through the peripheral area is substantially the same as that passed through the central area. When a light beam having a wavelength corresponding to the optical disc requiring the lower NA is converged on the optical disc requiring the lower NA at the lower NA, the phase of light flux passed through a first annular region included in the peripheral area is different from that passed through the central area, and the phase of light flux passed through a second annular region, which is outside the first region, is substantially the same as that passed through the central area.

REFERENCES:
patent: 5844879 (1998-12-01), Morita et al.
patent: 5909424 (1999-06-01), Lee et al.
patent: 6043912 (2000-03-01), Yoo et al.
patent: 6088322 (2000-07-01), Broome et al.
patent: 6118594 (2000-09-01), Maruyama
patent: 6147955 (2000-11-01), Lee et al.
patent: 6192021 (2001-02-01), Saito et al.
patent: 6198714 (2001-03-01), Yoo et al.
patent: 6222812 (2001-04-01), Yoo et al.
patent: 6259668 (2001-07-01), Lee et al.
patent: 6272096 (2001-08-01), Yoo et al.
patent: 6275461 (2001-08-01), Yoo et al.
patent: 6304540 (2001-10-01), Yoo et al.
patent: 6480344 (2002-11-01), Maruyama
patent: 6556534 (2003-04-01), Shimozono
patent: 6594222 (2003-07-01), Maruyama
patent: 6728042 (2004-04-01), Ota et al.
patent: 6807139 (2004-10-01), Sakamoto
patent: 11-86314 (1999-03-01), None

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