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Flare

From Biology-Online Dictionary | Biology-Online Dictionary
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Flare

(Science: microscopy) Unwanted light in an optical instrument that arises by reflection at lens surfaces (including the observers eyeglasses) and lens barrel, etc., and sometimes from lens aberration.

flare reduces image contrast and may form undesirable focused images and hot spots. Flare in a microscope is reduced by immersion of the condenser and objective lenses, anti-reflection