Focus detection based on frustrated total reflection

Ivan Q. Prikryl

doi:10.1117/12.218715

8 September 1995 Focus detection based on frustrated total reflection

Ivan Q. Prikryl

Proceedings Volume 2514, Optical Data Storage '95; (1995) https://doi.org/10.1117/12.218715
Event: Optical Data Storage '95, 1995, San Diego, CA, United States

Abstract

A new focus detection method based on filtering of the servo beam near the domain of frusterated total reflection is intoduced. The method naturally combines an unfocused, wide diameter servo beam with differential detection, making the focus servo of an optical drive extremely robust and dynamically stable.

Citation Download Citation

Ivan Q. Prikryl "Focus detection based on frustrated total reflection", Proc. SPIE 2514, Optical Data Storage '95, (8 September 1995); https://doi.org/10.1117/12.218715

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