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7426171 |
Optical lens, condenser lens, optical pickup, and optical recording/reproducing apparatus
Disclosed herein is an optical lens suitable for a near-field optical recording/reproducing system. A condenser lens, optical pickup, and optical recording/reproducing apparatus each using this...
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7417939 |
Optical pickup including aberration correction lens assembly
An optical pickup records information on an optical recording medium and retrieves information from the optical recording medium by radiating a light beam on the optical recording medium. The...
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7417938 |
Optical pickup apparatus including collimator lens with first lens group having negative power and being fixed and second lens group having positive power and being movable
Provided is an optical pickup apparatus which has a function for correcting spherical aberration caused by a thickness error of a transparent substrate and which is sufficiently compact, wherein a...
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7417935 |
Optical system having an objective system and an optical aberration correcting element
An optical system for use in an optical pickup device for recording and/or reproducing information on an optical recording media, the optical system having an optical axis and comprising: an...
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7403464 |
Lens and combination lens
A lens and combination lens able to suppress deviation of an optical axis of a lens occurring at the time of combination and able to be adjusted at a high precision, a method of producing the...
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7397752 |
Pickup for magneto-optical recording medium
A pickup for a magneto-optical recording medium is provided, which improves quality of reproduced signals by eliminating a phase difference between the polarizations and is capable of coping with...
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7394732 |
Object lens drive device, and disc recording and/or reproducing apparatus
The present invention is directed to an object lens drive device adapted for moving an object lens in a focus direction of optical axis direction and in a tracking direction perpendicular to the...
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