A presentation is given of a novel focusing tracking technique with increased feedthrough immunity applied to optical disks. The double-astigmatic method is discussed. A description is given of the system model and of the single-astigmatic method. The double-astigmatic method and plots of intensity of the detector plane for the beam centered on the land when 45 degrees astigmatism is presented are given.
|Original language||English (US)|
|Number of pages||8|
|Journal||Journal of the Optical Society of America B: Optical Physics|
|State||Published - Jan 1 1993|
ASJC Scopus subject areas
- Statistical and Nonlinear Physics
- Atomic and Molecular Physics, and Optics