Title:
OPTICAL HEAD, DISK DEVICE, AND MANUFACTURE OF OPTICAL HEAD
Document Type and Number:
Japanese Patent JP3873521
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an optical head, a disk device, an optical device, and manufacture of the optical head which permit high-density recording of an optical disk, and are miniaturized and improved in data transfer rate.
SOLUTION: When a laser beam 2a is emitted from a semiconductor laser unit 2, the laser beam 2a is shaped into a parallel beam 2b by a collimator lens 3, and is reflected a mirror 4 before converged by an object lens 5, and then made incident on a plane of incidence 6a of a transparent medium for condensing. Converged light 2c made incident on the plane of incidence 6a is refracted through the plane of incidence 6a, and the refracted light 2d is condensed on a plane 6b for condensation, and a light spot 9 is formed, and near field light 10 seeps out of a minute hole 7a in the direction orthogonal to a recording track. The near field light seeping out of the minute hole 7a is made incident to a recording film 8a of a recording medium 8 as propagating light, and this light makes it possible to record and reproduce on/from the recording film 8a.
Inventors:
Kiichi Ueyanagi
Application Number:
JP12520599A
Publication Date:
January 24, 2007
Filing Date:
April 30, 1999
Export Citation:
Assignee:
Fuji Xerox Co., Ltd
International Classes:
G11B7/135; G01N37/00; G01Q60/18; G01Q60/22; G01Q80/00; G02B13/00; G11B7/22; (IPC1-7): G11B7/135; G01N13/14; G01N13/10; G02B13/00; G11B7/22
Domestic Patent References:
| JP11176007A | ||||
| JP9212909A | ||||
| JP5189796A | ||||
| JP8313433A | ||||
| JP2000501546A | ||||
| JP11045455A | ||||
| JP59121302A | ||||
| JP2018720A |
Foreign References:
| US5729393 | ||||
| WO1996027880A1 |
Attorney, Agent or Firm:
Tadao Hirata
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