Improvement Of Focusing And Tracking Servos In Optical Disk Memory

Osamu Ito; Kyosuke Yoshimoto; Isao Watanabe; Takahiro Kubo

doi:10.1117/12.946445

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

Osamu Ito, Kyosuke Yoshimoto, Isao Watanabe, Takahiro Kubo

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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.

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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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