Static information storage and retrieval – Information masking – Transparency
Patent
1979-01-22
1981-09-08
Fears, Terrell W.
Static information storage and retrieval
Information masking
Transparency
365107, 356345, G11C 1142, G11C 1304
Patent
active
042888611
ABSTRACT:
A multiple beam or "multiphoton" absorption effect is used for creating three-dimensioal sensible objects including optical elements and three-dimensional computer-type data storage and retrieval systems. The objects and systems are made according to the invention by at least two beams of optical electromagnetic radiation having a spectral characteristic matched to the excited state properties of active media molecules, wherein the beams are simultaneously or sequentially directed to a common target location to effect a desired photochemical reaction. The first beam effects excitation of the molecule of the active media at the target locations such that the coincidence of the second beam and absorption thereof by the individual molecules at the target location effects a controlled chemical reaction causing a change in physical or refractive index characteristics, or in other words, production of physical or refractive index inhomogeneities.
REFERENCES:
patent: 3566371 (1971-02-01), Barnes
patent: 3833894 (1974-09-01), Aviram et al.
patent: 4078229 (1978-03-01), Swanson et al.
Kramer Stephen D.
Swainson Wyn K.
Fears Terrell W.
Formigraphic Engine Corporation
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