Optical pickup device, recording and reproducing apparatus...

Details Optical pickup device, recording and reproducing apparatus... Optical pickup device, recording and reproducing apparatus...

2007-06-12

2007-06-12

Korzuch, William (Department: 2627)

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

C369S112210, C369S112230

Reexamination Certificate

active

10714866

ABSTRACT:
An optical pickup device and an optical recording and reproducing apparatus are suitable for use with a near-field optical recording and reproducing system. An optical pickup device comprises an objective lens composed of a solid immersion lens (SIL), the objective lens having a numerical aperture greater than 1, a beam splitter102for reflecting both of a p-polarized light component and an s-polarized light component of reflected lights from an optical recording medium when the optical pickup device irradiates the optical recording medium with a bundle of rays in a predetermined polarized state from a light source through the objective lens to detect a component in the polarized state perpendicular to the polarized state of reflected light obtained when a distance between the surface of this optical recording medium and the flat surface portion of the solid immersion lens (SIL) is zero to produce a signal corresponding to the distance between the surface of the optical recording medium and the flat surface portion of the solid immersion lens, a dividing means110for dividing incident light into a p-polarized light component and an s-polarized light component reflected by the beam splitter102and a photo-detecting means120for separately detecting the p-polarized light component and the s-polarized light component divided by the dividing means110.

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U.S. Appl. No. 10/415,103, filed Apr. 30, 2003, Saito et al.
U.S. Appl. No. 10/714,866, filed Nov. 18, 2003, Saito et al.

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