Title :
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
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;
Conference_Titel :
Lasers and Electro-Optics Europe, 2000. Conference Digest. 2000 Conference on
Conference_Location :
Nice
Print_ISBN :
0-7803-6319-1
DOI :
10.1109/CLEOE.2000.910009
