polarizing filter

(redirected from polarising filters)

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 ?
Polarising filters can provide some interesting colour experiments.
b It requires the patient to wear polarising filters
d Specially designed polarising filters for use with infants are required
Polarising filters are also very useful because they reduce glare, help to emphasise any cloud detail in the sky and reduce the amount of light reaching the image sensor by up to two stops.
Polarising filters in the spectacles allow wearers to switch between normal and telescopic vision.
In ordinary use, the magnified image is not seen as it is blocked by polarising filters set in a companion pair of spectacles.
Every DermLite features a magnification lens, light-emitting diode (LED) lighting, and most have polarising filters for glare reduction.
For such rapidly changing light, polarising filters are a prerequisite, as well as a selection of neutral density graduated filters, for balancing the exposure caused by high-contrast lighting conditions.
Pack a polarising filter to enhance cloud detail and reduce glare and reflections from surface water--especially important if you're shooting from a boat in the middle of Windermere
Polarising filters are also handy as they cut out glare most visibly, help to emphasise any cloud in the sky and reduce the amount of light reaching the image sensor by up to two stops.
The use of polarising filters to emphasise clouds is popular among many photographers, but too much polarisation can darken areas of clear sky to an almost unnatural level.
In bright conditions, a polarising filter is ideal for removing unwanted reflections, boosting contrast and making colours appear more saturated--particularly blue skies and white clouds, Circular polarisers are made to screw into the front tens element: prices vary according to the size of the filter thread and quality of the glass used, but typically start at around 20 [pounds sterling].