Dual-layer-compatible optical head: integration with a liquid-crystal panel

Author

Tanase, Hironobu ; Hashimoto, Gakuji ; Yamamoto, Kenji ; Tanaka, Tomomichi ; Nakao, Takashi ; Kurokawa, Kotaro ; Ichimura, Isao ; Osato, Kiyoshi

Author_Institution

Opt. Disc Dev. Div., Sony Corp., Tokyo, Japan

fYear

2002

fDate

2002

Firstpage

392

Lastpage

394

Abstract

We have developed a dual-layer-compatible optical head integrated with a liquid-crystal panel. We conclude that our optical head possesses sufficient ability for recording and reading a dual-layer disc whose layer separation is 20 μm or more. We have also confirmed the efficiency of a new method to drive a liquid-crystal panel, which is to mix the controlling signals of a liquid-crystal panel into the driving signals of a two-axis actuator. By using this integrated optical head instead of a beam expander, a compact optical pickup for dual-layer discs can be realized.

Keywords

aberrations; compensation; driver circuits; electromagnetic actuators; liquid crystal devices; optical disc storage; 20 micron; 23.3 GByte; beam expanders; compact optical pickups; disc layer separation; dual-layer disc recording/reading; dual-layer-compatible optical heads; liquid-crystal panel aberration compensation; liquid-crystal panel control signals; liquid-crystal panel drive mechanism; liquid-crystal panel integration; spherical aberration compensation; two-axis actuator drive signals; Actuators; Electrodes; Frequency; Integrated optics; Lenses; Optical mixing; Optical recording; Optical sensors; Polarization; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Memory and Optical Data Storage Topical Meeting, 2002. International Symposium on

Print_ISBN

0-7803-7379-0

Type

conf

DOI

10.1109/OMODS.2002.1028677

Filename

1028677