Optical recording system

Details Optical recording system Optical recording system

2011-06-28

2011-06-28

Ruthkosky, Mark (Department: 1785)

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

C503S221000

Reexamination Certificate

active

07968166

ABSTRACT:
Systems and method for optically recording data. One system comprises a disc comprising a substrate and a markable coating on said substrate, the markable coating having a thickness less than 1 μm and comprising: a matrix; and a color-forming agent included in the matrix and comprising a leuco dye and developer; wherein the leuco dye is selected to change from high reflectance of radiation with wavelengths between 400 and 500 nm to low reflectance of radiation with wavelengths between 400 and 500 nm when activated by the application of energy above a threshold level; and a marking light source positioned so as to illuminate the disc in a desired manner.

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patent: WO 2004064053 (2004-07-01), None
patent: WO 2004/075248 (2004-08-01), None

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