@inproceedings{34b4c37eb0074e9796a7802db5d715a8,
title = "Differential spot-size focus servo",
abstract = "The performance of a differential spot-size (wax-wane) focus servo is described. Cross-talk from the tracks is analyzed in the single detector and differential focus circuits. Magnitude of the cross-talk is reduced by a factor of three in the differential circuit. A false FES signal is present when the spot crosses sector marks at an angle.",
author = "Milster, {Tom D.} and Wang, {Mark S.} and Froehlich, {Fred F.} and Kann, {J. L.} and Treptau, {Jeff P.} and Erwin, {K. E.}",
year = "1991",
doi = "10.1117/12.45899",
language = "English (US)",
isbn = "0819406082",
series = "Proceedings of SPIE - The International Society for Optical Engineering",
publisher = "Publ by Int Soc for Optical Engineering",
pages = "348--353",
booktitle = "Proceedings of SPIE - The International Society for Optical Engineering",
note = "Optical Data Storage '91 ; Conference date: 25-02-1991 Through 27-02-1991",
}