Title:
OPTICAL INFORMATION RECORDING DEVICE AND METHOD, OPTICAL INFORMATION REPRODUCING DEVICE AND METHOD, AND OPTICAL INFORMATION RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3452113
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make an optical recording and reproducing system small in configuration.
SOLUTION: During recording, the emitted light of a laser coupler 20 is modulated by a spacer optical modulator 16 based on a difference in polarizing direction, the light is divided into an information light and a reference light by an S polarization hologram 15 by making converging positions different from each other based on the polarizing direction, the information light and the reference light are rotary-rotated to have the same polarization direction with each other by a bisected rotary polarizing plate 14 in an area where the information light and the reference light overlap each other in a halogen layer 3 and, by irradiating the hologram layer 3 with light via an objective lens 12, an interference pattern is recorded. During reproduction, the hologram layer 3 is irradiated with the reference light, a primary reproducing light produced by this reference light produces a secondary reproducing light by using the light reflected on a reflection layer 5 as a secondary reference light and the pattern of this secondary reproducing light is detected by a CCD array 18.
Inventors:
Hideyoshi Horigome
Kimihiro Saito
Kimihiro Saito
Application Number:
JP10461497A
Publication Date:
September 29, 2003
Filing Date:
April 22, 1997
Export Citation:
Assignee:
ソニー株式会社
International Classes:
G11B7/00; G11B7/004; G11B7/0045; G11B7/0065; G11B7/125; G11B7/128; G11B7/135; G11B7/1369; G11B7/1395; (IPC1-7): G11B7/004; G11B7/0045; G11B7/135
Domestic Patent References:
| JP1204220A | ||||
| JP3120625A | ||||
| JP4370529A | ||||
| JP5877359U |
Attorney, Agent or Firm:
Yoichiro Fujishima