Abstract
THE Eastman Kodak Company, at the ninth International Congress of Photography recently held in Paris, demonstrated a new kind of light polariser, known as the ‘Pola filter’. This is made in sheets and may be used to produce effects similar to those obtained with a Nicol prism. Thus when used in pairs, any desired degree of extinction may be obtained by rotating one filter in relation to the other. In photography alone there are many very useful applications for these filters, such as the elimination of surface reflections from glass windows, water, coloured objects (with consequent increased saturation of the colours), the modulation of blue sky brightness with out alteration of hue, etc. The comparative cheapness of these filters, and the possibility of manufacturing them in large sizes, opens up a great vista of applica tions, in which has been suggest their use to combat headlight glare with motor-cars.
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Polarising Light Filters. Nature 136, 136 (1935). https://doi.org/10.1038/136136b0
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DOI: https://doi.org/10.1038/136136b0