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Differential spot-size focus servoWe describe performance of a differential spot-size (wax-wane) focus servo. Crosstalk from the tracks are analyzed in the single detector and differential focus circuits. Magnitude of the crosstalk is reduced by a factor of three in the differential circuit. A false focus-error signal (FES) is present when the spot crosses sector marks at an angle.
Document ID
19920005691
Acquisition Source
Legacy CDMS
Document Type
Preprint (Draft being sent to journal)
Authors
Milster, T. D. (Arizona Univ. Tucson, AZ, United States)
Wang, M. S. (Arizona Univ. Tucson, AZ, United States)
Froehlich, F. F. (Arizona Univ. Tucson, AZ, United States)
Kann, J. L. (Arizona Univ. Tucson, AZ, United States)
Treptau, J. P. (Arizona Univ. Tucson, AZ, United States)
Erwin, K. E. (Arizona Univ. Tucson, AZ, United States)
Date Acquired
September 6, 2013
Publication Date
March 15, 1991
Publication Information
Publication: Research Studies on Advanced Optical Module(Head Designs for Optical Devices
Subject Category
Optics
Accession Number
92N14909
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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