Development of tilt servo system using 4-axis lens actuator for disk tilt compensation

Y. Motegi; M. Nagasato; Yoriyuki Ishibashi; Hiroshi Someya; Nobutaka Kikuiri

doi:10.1117/12.997618

28 June 1999 Development of tilt servo system using 4-axis lens actuator for disk tilt compensation

Y. Motegi, M. Nagasato, Yoriyuki Ishibashi, Hiroshi Someya, Nobutaka Kikuiri

Proceedings Volume 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999; 386407 (1999) https://doi.org/10.1117/12.997618
Event: Optical Data Storage, 1999, Kauai, HI, United States

Abstract

High-Definition DVD 15 GB/side recording capacity is realized by using violet laser diodes, and it is expected to be the next generation optical disc. However, the shortening in the wavelength of laser diode and increase in recording density lead to a tighter margin for allowable disc tilt due to the wavefront aberration. Therefore, a tilt servo system using a 4-axis lens actuator has been developed. It controls the object lens not only in tracking and focusing directions but also in two axes tilt directions corresponding to disc tilt. This paper describes features of the tilt servo system and the experimental results of its tilt compensation effect.

Citation Download Citation

Y. Motegi, M. Nagasato, Yoriyuki Ishibashi, Hiroshi Someya, and Nobutaka Kikuiri "Development of tilt servo system using 4-axis lens actuator for disk tilt compensation", Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 386407 (28 June 1999); https://doi.org/10.1117/12.997618

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