actinic focus

actinic focus

[‚ak′tin·ik ′fō·kəs]
(optics)
The point in an optical system at which the chemically most effective rays (usually those in the ultraviolet) converge. Also known as chemical focus.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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