Title:
HIGH DENSITY OPTICAL INFORMATION REPRODUCING DEVICE
Document Type and Number:
Japanese Patent JP3579413
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a high density optical information reproducing device that allows a simple and small-sized optical system to be constituted, while the amount of irradiation light irradiated on a recording medium can be controlled properly.
SOLUTION: Between a light source means and a beam splitter, an optical filter is arranged and outgoing light of the optical filter is reflected by the beam splitter. Based on the detected result of a photo-detector to receive the reflected light, the amount of a light beam from a light source means is controlled.
Inventors:
Kunio Yamamiya
Application Number:
JP2002320241A
Publication Date:
October 20, 2004
Filing Date:
May 17, 1994
Export Citation:
Assignee:
Olympus Endo Technology America Inc.
International Classes:
G11B7/125; G11B7/135; (IPC1-7): G11B7/125; G11B7/135
Domestic Patent References:
| JP60237648A | ||||
| JP5120720A | ||||
| JP5242520A | ||||
| JP6131683A |
Attorney, Agent or Firm:
Susumu Ito
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