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AssigneeSony Corporation
InventorsKimihiro SAITO, Tsutomu Ishimoto
Estimating the term…
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 splitter configured to reflect 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, a divider configured to divide incident light into a p-polarized light component and an s-polarized light component reflected by the beam splitter, and a photo-detector configured to separately detect the p-polarized light component and the s-polarized light component divided by the divider.
An optical pickup device including a condenser lens composed of a solid immersion lens having a spherical surface portion and a flat surface portion parallel to the surface of an optical recording medium, said condenser lens having a numerical aperture greater than 1, a bundle of rays in a predetermined polarized state being irradiated on said optical recording medium from a light source through said condenser lens and a polarized state component perpendicular to the polarized state of reflected light obtained when a distance between the surface of said optical recording medium and the flat surface portion of said solid immersion lens is zero is detected from reflected light from said optical recording medium to obtain a signal corresponding to the distance between the surface of said optical recording medium and the flat surface portion of said solid immersion lens, comprising:
A recording and reproducing apparatus for recording and/or reproducing an optical recording medium by using an optical pickup device including a condenser lens composed of a solid immersion lens having a spherical surface portion and a flat surface portion parallel to the surface of said optical recording medium, the condenser lens having a numerical aperture greater than 1, said optical pickup device comprising a beam splitter configured to reflect both of a p-polarized light component and an s-polarized light component in reflected lights from said optical recording medium, a divider configured to divide the p-polarized light component and the s-polarized light component reflected by said beam splitter, and a photo-detector configured to separately detect the p-polarized light component and the s-polarized light component divided by said divider, comprising:
Dependencies are inferred from the claim text.