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Proceedings Paper

Three-dimensional multi-layered optical card storage
Author(s): Takuo Tanaka
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Paper Abstract

Optical card storage is one of the most compact form of data storage, which stores information on plastic card of credit-card size. This method of optical storage has been intensively explored for commercial applications. However, the capacity of this storage is strictly limited. The capacity is given by the total size of memory area divided by the extent of laser-beam spot, and the minimum size of spot is as large as a half of light wavelength due to the light-wave diffraction. To overcome this limitation, we record pits into multiple layers in a volume medium in three-dimensions rather than only in the surface of the medium[1-2]. In this paper, we describe the multi-layered optical card system, which we developed.

Paper Details

Date Published: 1 September 1996
PDF: 2 pages
Proc. SPIE 2778, 17th Congress of the International Commission for Optics: Optics for Science and New Technology, 2778G0 (1 September 1996); doi: 10.1117/12.2316265
Show Author Affiliations
Takuo Tanaka, Osaka Univ. (Japan)


Published in SPIE Proceedings Vol. 2778:
17th Congress of the International Commission for Optics: Optics for Science and New Technology
Joon-Sung Chang; Jai-Hyung Lee; ChangHee Nam, Editor(s)

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