14 January 1987 Effects Of Disk Substrate Quality On Optical Drive Performance
Author Affiliations +
The quality of substrate that exists between the optical head and the media sensitive layer is known to critically influence the drive performance. First, we report here the degradation of the servo and read signals by the parallelism of the two surfaces of the plastic substrate. It is conclusive that the peak to peak variation of plastic parallelism in the radial direction over one revolution can cause tracking instability and data cross talk. Consequently, the seek accuracy and bit timing accuracy in the optical drive are degraded. Second, we report that the variation of birefringence over one revolution results in the variation of light feedback into the laser cavity. This increases the laser noise, and thus degrades the read performance, especially when the laser output power is in the lower range.
© (1987) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
C. H. Chung, William Harvey, "Effects Of Disk Substrate Quality On Optical Drive Performance", Proc. SPIE 0695, Optical Mass Data Storage II, (14 January 1987); doi: 10.1117/12.936845; https://doi.org/10.1117/12.936845


Slidestore: A Progress Report
Proceedings of SPIE (January 01 1983)
LCD with 7-um light management path
Proceedings of SPIE (May 14 2002)
Magneto-optical storage card
Proceedings of SPIE (February 07 2001)
Compact-Size Optical Head For Magneto-Optical Disk Drive
Proceedings of SPIE (January 14 1987)

Back to Top