Dual layer digital versatile disk pickup integrating opto-electronic and diffractive elements

Author

Bhattacharya, S. ; Stankovic, S. ; Dias, D. ; Hain, M. ; Glockner, R. ; Karaboue, C. ; Benmohammadi, L. ; Guessous, F. ; Tschudi, T. ; Fersil, M. ; Pawlowski, E. ; Steingruber, R. ; Kuhlow, B. ; Wang, L.L.

Author_Institution

Inst. fur Angewandte Phys., Tech. Univ. Darmstadt, Germany

fYear

2000

fDate

10-15 Sept. 2000

Abstract

Summary form only. A pickup using an optoelectronic, nematic LC lens and two diffractive optical elements (DOEs) was designed and a demonstrator model built. It was successfully demonstrated that the LC lens could focus onto both layers of a dual layer DVD. Focus switching of below 10ms were achieved. The working principle and the fabrication methods of the DOEs and the design and working of the LC lens are described. Measurements of the integrated pickup using the astigmatism method are presented.

Keywords

diffractive optical elements; liquid crystal devices; nematic liquid crystals; optical design techniques; optical disc storage; optical fabrication; optical films; optical focusing; pick-ups; 10 ms; 75 percent; 90 percent; astigmatism method; diffractive elements; dual layer DVD; dual layer digital versatile disk pickup; fabrication methods; focus switching; integrated pickup; nematic LC lens; opto-electronic elements; DVD; Diffraction; Laser transitions; Lenses; Liquid crystals; Memory; Optical design; Optical modulation; Tellurium; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on

Conference_Location

Nice

Print_ISBN

0-7803-6319-1

Type

conf

DOI

10.1109/CLEOE.2000.910009

Filename

910009