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US 4,045,115 AGranted
Optics for multi-track holographic tape recorder
AssigneeHoneywell Inc.
InventorTzuo-Chang Lee
Life of this patent
Estimating the term…
Abstract
Optics for a multi-track holographic tape recorder are disclosed. A multiplicity of one-dimensional page composers and passive optical means store the data in a multiple track format on a moving tape.
Claims11
A multi-track holographic recorder comprising:
- a plurality of one-dimensional page composers;
- light beam means for supplying mutually coherent signal and reference beams, and signal beam simultaneously illuminating all of said page composers;
- passive optical means for simultaneously directing a light beam from each page composer to a separate location at a memory medium, said passive optical means including optical Fourier Transform means, each light beam at the memory medium forming a one-dimensional Fourier Transform of the information in the page composer and each Fourier Transform interferring with the mutually coherent reference beam to form a one-dimensional hologram.
A multi-track holographic recorder comprising:
- a plurality of one-dimensional page composers;
- light beam means for supplying mutually coherent signal and reference beams, said signal beam simultaneously illuminating all of said page composers;
- first passive optical means for simultaneously directing a light beam from each page composer to a separate location at a memory medium;
- optical Fourier Transform means in the light beam path forming from each light beam at the memory medium a one-dimensional Fourier Transform of the information in the respective page composer;
- and,
- second optical means directing said mutually coherent reference beam to each of said separate locations at the memory medium to interfere with the Fourier Transforms to form one-dimensional holograms.
3 more elements
Dependencies are inferred from the claim text.