04288861 is referenced by 91 patents and cites 3 patents.

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.

Title
Three-dimensional systems
Application Number
544480
Publication Number
4288861
Application Date
January 22, 1979
Publication Date
September 8, 1981
Inventor
Stephen D Kramer
Oakland
CA, US
Wyn K Swainson
Berkeley
CA, US
Agent
Townsend and Townsend
Assignee
Formigraphic Engine Corporation
CA, US
IPC
G11C 13/04
G11C 11/42
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