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phase holograms in pmmaComplex, computer-generated phase holograms written in thin films of poly(methyl methacrylate) (PMMA) by process of electron-beam exposure followed by chemical development. Spatial variations of phase delay in holograms quasi-continuous, as distinquished from stepwise as in binary phase holograms made by integrated-circuit fabrication. Holograms more precise than binary holograms. Greater continuity and precision results in decreased scattering loss and increased imaging efficiency.
Document ID
19940000333
Document Type
Other - NASA Tech Brief
Authors
Maker, Paul D.
(Caltech)
Muller, Richard E.
(Caltech)
Date Acquired
August 16, 2013
Publication Date
June 1, 1994
Publication Information
Publication: NASA Tech Briefs
Volume: 18
Issue: 6
ISSN: 0145-319X
Subject Category
PHYSICAL SCIENCES
Report/Patent Number
NPO-18791
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.