Optical: systems and elements – Holographic system or element – Having particular recording medium
Patent
1991-01-09
1992-04-14
Arnold, Bruce Y.
Optical: systems and elements
Holographic system or element
Having particular recording medium
359 10, 359 35, G02B 104
Patent
active
051052873
ABSTRACT:
A pulsed laser provided a pulsed incident beam which impinges a recording assembly which includes a glass substrate and a recording film adhered thereto. The pulse can be singular or multiple. In either event, the duration of each pulse of light is controlled in such a fashion so that the pulse is long enough to enable it to reflect off of a reflecting element to thereby produce a primary reflected beam. In the recording film, the primary reflected beam can interfere with the incident beam to produce the interference pattern in the film. However, the pulse is not of such a duration to allow a noise reflected beam, such as one from a glass-air interface, to pass through the recording film and interfere with the incident beam or primary reflected beam while those beams are still present. Thereby, noise holograms which might otherwise be recorded in the film are precluded while allowing the primary hologram to be recorded.
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Moss Gaylord E.
Wreede John E.
Alkov Leonard A.
Arnold Bruce Y.
Denson-Low Wanda K.
Hughes Aircraft Company
Ryan J. P.
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