Optical head, disk apparatus, method for manufacturing optical h

Details Optical head, disk apparatus, method for manufacturing optical h Optical head, disk apparatus, method for manufacturing optical h

1999-03-18

2000-11-28

Mack, Ricky

Optical: systems and elements

Lens

With support

369 43, 369112, G02B 702, G11B 2110, G11B 700

Patent

active

061543268

ABSTRACT:
An optical head which implements high recording density of a recording medium and which is miniaturized in size and improved in data transfer rate, a disk apparatus, and a method for manufacturing the optical head are provided. A laser beam is emitted from a semiconductor laser, the laser beam is collimated by the collimator lens to a collimated beam and reflected by a mirror, condensed by an condense lens, and incident to an incident surface of a transparent condensing medium. The condensed beam which was incident to the incident surface is refracted by the incident surface, the refracted beam is condensed on a condense surface, a beam spot is formed on the condense surface, and a near field wave leaks from a small aperture. The near field wave leaked from the small aperture propagates in a recording layer of a recording. The beam is served for recording/reproduction on the recording layer.

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