Optical information memory storage and optical device

Application Number: 00108347
Application Date: 2000.05.12
Publication Number: 1274150
Publication Date: 2000.11.22
Priority Information: 1999/5/14 JP 134510/1999; 1999/12/13 JP 353048/1999
International: G11B7/135
Applicant(s) Name: Fujitsu Ltd.
Inventor(s) Name: Hasegawa Shinya;Aoyama Nobuhide;Oda Shimawataru
Patent Agency Code: 11038
Patent Agent: jiang shixun
Abstract There is disclosed a small lightweight optical information storage apparatus which can obtain a sufficient writing light quantity, and an optical device used in an optical head of the information storage apparatus. The optical device comprises a splitting surface constituted of a part of a cylindrical surface; a light emitted from a light source is passed via the optical device and directed to an optical information storage medium, and a light signal is split from a return beam from the optical information storage medium by the optical device.