Title:
ランド/グルーブ判別方法及び光記録再生機器
Document Type and Number:
Japanese Patent JP4153195
Kind Code:
B2
Abstract:
A land/groove discriminating method and an optical recording and/or reproducing apparatus employing the method are provided. The land/groove discriminating method emits a light beam onto an optical disc having lands and grooves through an optical element capable of causing and varying an effect of thickness variation of the optical disc, detects a light beam reflected/diffracted from the optical disc by dividing the reflected/diffracted light beam into inner and outer light beam portions, and discriminates between a land and a groove of the optical disc by detecting variation in a difference signal between detection signals from the inner and outer light beam portions while varying the degree of the effect of thickness variation of the optical disc by driving the optical element.
Inventors:
Anei Man
Chung Kanezo
Yasutaka Kim
Xu Yi Sada
Gold bell culture
Chung Kanezo
Yasutaka Kim
Xu Yi Sada
Gold bell culture
Application Number:
JP2001365291A
Publication Date:
September 17, 2008
Filing Date:
November 29, 2001
Export Citation:
Assignee:
SAMSUNG ELECTRONICS CO.,LTD.
International Classes:
G11B7/004; G11B7/007; G11B7/085; G11B7/09; G11B7/125; G11B7/13; G11B7/131; G11B7/135; G11B7/1369; G11B7/1392
Domestic Patent References:
| JP200057616A | ||||
| JP200021014A |
Attorney, Agent or Firm:
Masatake Shiga
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro
Takashi Watanabe
Yasuhiko Murayama
Shinya Mitsuhiro