NASA NTRS · 19690023974
Electronically tuned optical filters
Abstract
Electro-optical effect of light modifying type for electronically controlling color
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Castellano, J. P., Heilmeier, G. H., Mc Caffrey, M. T., Pasierb, E. F., Jr.. 1969-04-01. Electronically tuned optical filters. https://ntrs.nasa.gov/citations/19690023974
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