Optical media integrity detection

Details Optical media integrity detection Optical media integrity detection

2006-08-08

2006-08-08

Hindi, Nabil (Department: 2655)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S053120, C369S053170, C369S047440

Reexamination Certificate

active

07088657

ABSTRACT:
An optical media drive contains light reflective surfaces positioned about a transparent center portion of the optical media. The light reflective surfaces reflect laser light from a laser unit of the drive which is directed toward the transparent center portions of the optical media. Defects such as cracks in the optical media disturb the reflection. The disturbance is detected by a laser lens and represented by a signal corresponding to the size of the defect. Information about the cracks is used to determine a safe spin rate for the optical media.

REFERENCES:
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“Welcome to Media Sciences—Interchangeable Media for Computer Mass Storage”, http://www.mscience.com/, Media Sciences, Inc., Marlborough, MA 01752-3527, 9 pages.
Cherry, B., “Repairing Scratched CDs”, http://www.banjo.com/Articles/021096.html, Copyright 1996, Bob Cherry, 2 pages, (Feb. 1996).
Woodrough, R., “Keeping an eye on optical disks”,Sensor Review(UK),vol. 9, No. 1, Jan. 1989, ISSN-0260-2288, (Abstract only—1 p, (Jan. 1989).

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