polarizing filter

(redirected from Photographic filter)
Also found in: Dictionary, Wikipedia.

polarizing filter

[′pō·lə‚rīz·iŋ ‚fil·tər]
(optics)
A device which selectively absorbs components of electromagnetic radiation passing through it, so that light emerging from it is plane-polarized.
References in periodicals archive ?
A POWYS company specialising in photographic filters is under new ownership Llanidloes-based Photogenic has been acquired by an angel investor in the xnos network, Aubrey Greene.
Most other filter materials, such as smoked glass, photographic filters, or layers of colored plastic, should never be used even if they seem to darken the Sun enough.
Armed with gas-hypered Technical Pan 2415 film and a 16-inch f/4.5 Newtonian, we made our initial exposures through a set of Lumicon photographic filters. Even with these high-transmission filters, the exposures were long -- 45, 75, and 90 minutes in red, green, and blue light, respectively.
Specially made solar photographic filters, designed to pass more of the Sun's light, are okay only if used with caution.

Full browser ?