Thin film and interferometric optical disk media and mass produc

Details Thin film and interferometric optical disk media and mass produc Thin film and interferometric optical disk media and mass produc

1996-05-01

1997-12-23

Ryan, P. T.

Stock material or miscellaneous articles

Circular sheet or circular blank

428 642, 428 644, 428 648, 428457, 428913, 43027014, 4304951, 430945, 3692754, 369283, 369288, B32B 300

Patent

active

057005397

ABSTRACT:
An optical disk records digital information in optically-reflective layers that each vary in thickness between constructive interference of a monochromatic light and destructive interference of the said monochromatic light. The difference in the intensity of a reflected light beam subjected to interferometric constructive and destructive interference is used to communicate digital data from the optically-reflective layers and a detector. The optical disk provides for multiple layers of digital information that are tuned for interferometric response at correspondingly different monochromatic wavelengths of light. Another embodiment of the present invention is a mass-production process for making such an interferometric optical disk. Another embodiment of the present invention is a variation that includes layers that are emitting or absorbing depending on dopants.

REFERENCES:
patent: 4450553 (1984-05-01), Holster
patent: 5213859 (1993-05-01), Aoi
G. Hong, "Innovations in Mask Making and Blank Production", 1987, pp. 37-44.
"Compact News", Optical Disk Manufacturing Equipment (ODME), vol. 2, No. 1, Jan. 1995.
Y. Okino, et al., "Developments in fabrication of optical disks", SPIE vol. 329, Optical Disk Technology (1982), pp. 236-241.
S. Horigome, et al., "Novel stamper process for optical disc", SPIE vol. 899, Optical Storage Technology and Applications (1988), pp. 123-128.

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