Improvement Of Focusing And Tracking Servos In Optical Disk Memory

Osamu Ito; Kyosuke Yoshimoto; Isao Watanabe; Takahiro Kubo

doi:10.1117/12.946445

12 April 1985 Improvement Of Focusing And Tracking Servos In Optical Disk Memory

Osamu Ito, Kyosuke Yoshimoto, Isao Watanabe, Takahiro Kubo

Proceedings Volume 0529, Optical Mass Data Storage I; (1985) https://doi.org/10.1117/12.946445
Event: 1985 Los Angeles Technical Symposium, 1985, Los Angeles, United States

Abstract

In a single beam read-write optical head, an astigmatic method using a cylindrical lens and a push-pull method are adopted for focusing and tracking error sensing, respectively. The disturbances for the servo sensing signals when the optical head records and reads along a pregrooved track, which has the depth of X/8 and is locally intermittent for address code, are compensated by signal processing technology.

Citation Download Citation

Osamu Ito, Kyosuke Yoshimoto, Isao Watanabe, and Takahiro Kubo "Improvement Of Focusing And Tracking Servos In Optical Disk Memory", Proc. SPIE 0529, Optical Mass Data Storage I, (12 April 1985); https://doi.org/10.1117/12.946445

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