Radiation imagery chemistry: process – composition – or product th – Post imaging processing – Physical developing
Patent
1978-05-22
1983-02-08
Lee, John D.
Radiation imagery chemistry: process, composition, or product th
Post imaging processing
Physical developing
350311, 350320, 430 1, 430321, G02B 518
Patent
active
043726496
ABSTRACT:
Large area, diffractive subtractive color filters are provided from a density image of a standing wave interference fringe field pattern in a high speed, high resolution silver halide photographic plate. The high speed enables conventional coherent sources to be spread out to provide a low but constant intensity over extended areas, while still enabling the production of the density image at exposure times sufficiently short to preclude vibrational degradation in resolution. The plates are then developed, overcoated with a photoresist and back-exposed, after which the photoresist is developed to provide a subtractive filter having an extended area surface relief pattern which includes a width controlled periodic diffraction grating.
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Alexander Cruzan
Barte William B.
Lee John D.
Minnesota Mining and Manufacturing Company
Sell Donald M.
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