28 June 1999 Lens shift correction for DVD-RAM tracking servo
Author Affiliations +
Generally, push-pull tracking detection, necessary for read/write type optical disk, is sensitive to tracking lens-shift caused by eccentric disk rotation or track jump acceleration /deceleration. The lens-shift yields tracking offset easily, which makes record or reproduction information signal jitters get worse. The tracking offset versus to the lens-shift tends to be large, as an optical pick-up becomes small. Furthermore, in consideration of mobile application, not only the lens-shift but also the lens droops in a vertical posture increases.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Tetsuya Shihara, Tetsuya Shihara, Katsuya Watanabe, Katsuya Watanabe, Shin-ichi Kadowaki, Shin-ichi Kadowaki, Hiromichi Ishibashi, Hiromichi Ishibashi, } "Lens shift correction for DVD-RAM tracking servo", Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 38640A (28 June 1999); doi: 10.1117/12.997639; https://doi.org/10.1117/12.997639


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