Dielectric thin-film color optical memory device and...

Details Dielectric thin-film color optical memory device and... Dielectric thin-film color optical memory device and...

2006-08-08

2006-08-08

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C430S270120

Reexamination Certificate

active

07087281

ABSTRACT:
The DTF optical memory makes use of the property of dielectric thin film interference to create multi-color pixels and serve as a multi-level optical memory device. The fabrication of the device comprises a dielectric thin film deposited on a substrate that is micro-milled utilizing focused ion beam (FIB) technology. Such micro-milling creates pixels of varying depth that when exposed to a broad-band light source create distinct colors caused by the properties of thin film interference and superposition of reflected light from the broad band source, thus creating an effective optical memory device that may be detected using a color CCD camera or a photo-detector array. Accurate creation and detection of discrete colors allows accurate digital encoding and direct storage of color image in a format of sub-micron pixel array. The robustness of the DTF optical memory device allows operation under harsh environmental conditions, including high temperatures and radiation.

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Chi, C.J. and Steckl, A. J., “Digital thin-film color optical memory,” Applied Physics Letters 78:2, pp. 255-257, Jan. 8, 2001.
Chi, Robert Chih-Jen, Dissertation, Optical memory device using vertical-interference from digital thin films, dated Mar. 27, 2001.

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