Objective lens and optical data storage apparatus comprising...

Details Objective lens and optical data storage apparatus comprising... Objective lens and optical data storage apparatus comprising...

2010-08-20

2011-10-11

Criado, Jorge Ortiz (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112020, C369S013330

Reexamination Certificate

active

08036094

ABSTRACT:
An objective lens is described, which is switchable between a far-field mode and a near-field mode. The objective lens comprises a lens, an optical element having a variable refractive index and a solid immersion lens, which are disposed on a common optical axis, wherein the optical element is arranged at a convex side of the solid immersion lens and has a top and a bottom surface arranged adjacent to each other in a direction of the optical axis, the bottom surface having a concave shape that is adapted to the shape of the convex side of the solid immersion lens and the top surface having a curvature that is lower than a curvature of the convex side of the solid immersion lens, and wherein a difference between a refractive index of the optical element and the solid immersion lens is small in the far-field mode so that the solid immersion lens and the optical element act substantially as a single optical element in the far-field mode, whereas the difference is large in the near-field mode so that the optical effect of the solid immersion lens is significant in the near-field mode.

REFERENCES:
patent: 4904063 (1990-02-01), Okada et al.
patent: 5416757 (1995-05-01), Luecke et al.
patent: 6567365 (2003-05-01), Hendriks et al.
patent: 2006/0143636 (2006-06-01), Shin
patent: 1400963 (2004-03-01), None
patent: 1785991 (2007-05-01), None
patent: 2000163792 (2000-06-01), None
patent: 2001184691 (2001-07-01), None
International Search report dated Dec. 15, 2009.

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