Paper
28 June 1999 Is a round focus spot better than an oval shaped spot?
Ivan Prikryl
Author Affiliations +
Abstract
It is well recognized that the smaller the focused spot size the higher the data density that can be stored on an optical disk. Together, the optical disk and an optical head define the optical system for reading data from and writing data on the disk.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ivan Prikryl "Is a round focus spot better than an oval shaped spot?", Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 38640F (28 June 1999); https://doi.org/10.1117/12.997583
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KEYWORDS
Head

Semiconductor lasers

Digital video discs

Signal to noise ratio

Monochromatic aberrations

Wavefront aberrations

Gaussian beams

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