Title:
OPTICAL PICKUP DEVICE AND RECORDING AND REPRODUCING DEVICE
Document Type and Number:
Japanese Patent JP3785702
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To miniaturize the optical pickup device and to reduce the number of constituent parts and then to accurately write and read an information signal on an optical recording medium by making a light beam emitted from a semiconductor laser incident as a divergent light beam as it is upon a reflecting mirror.
SOLUTION: A linearly polarized divergent light beam emitted from a semiconductor laser 1 will not give rise to a distribution of polarization directions in the light beam after being reflected by a reflecting surface of the reflecting mirror 4, provided with a reflected phase difference δP-S between a P- polarization component and an S-polarization component on this reflecting surface satisfies inequality (2n+1)π-(π/4)≤δP-S<(2n+1)π+(π/4) (n: integer).
Inventors:
Noriaki Nishi
Kiyoshi Toyoda
Kiyoshi Toyoda
Application Number:
JP27671496A
Publication Date:
June 14, 2006
Filing Date:
October 18, 1996
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G11B11/10; G11B11/105; G11B7/135; (IPC1-7): G11B11/10; G11B7/135
Domestic Patent References:
| JP785498A | ||||
| JP8212612A | ||||
| JP7147034A | ||||
| JP785498A | ||||
| JP737266A | ||||
| JP6349103A | ||||
| JP6302041A | ||||
| JP6195795A | ||||
| JP6180887A | ||||
| JP5234173A | ||||
| JP60260440A |
Attorney, Agent or Firm:
Akira Koike
Eiichi Tamura
Seiji Iga
Eiichi Tamura
Seiji Iga
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