Panchromatic film is a type of
black-and-white photographic filmthat is sensitive to all wavelengths of visible light. A panchromatic film therefore produces a realistic image of a scene. Almost all modern photographic film is panchromatic, but some types are orthochromaticand are not sensitive to certain wavelengths of light. As naturally prepared, silver halideemulsions are much more sensitive to blue and UV light than to green and red wavelengths. The German chemist Hermann W. Vogelfound out how to extend the sensitivity into the green, and later the orange, by adding sensitising dyes to the emulsion. However, his technique was not extended to achieve a fully panchromatic film until the early 1900s, shortly after his death.
Digital panchromatic imagery of the
Earth's surface is also produced by some modern satellites, such as QuickBirdand IKONOS. This imagery is extremely useful, as it generally is of a much higher resolution than the multispectralimagery from the same satellite. For example, the QuickBirdsatellite produces panchromatic imagery having a pixel equivalent to an area 0.6m x 0.6m, while the multispectralpixels represent an area of 2.4m x 2.4m.
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panchromatic film — Film coated with an emulsion that is affected by all colors formed in the visible spectrum. These colors are recorded in various shades of gray, from near white to near black … Aviation dictionary
panchromatic film — noun photographic film sensitive to light of all colors (including red) • Hypernyms: ↑film, ↑photographic film … Useful english dictionary
panchromatic — [pan΄krō mat′ik] adj. [ PAN + CHROMATIC] sensitive to light of all colors [panchromatic film] panchromatism [pan krō′mə tiz΄əm] n … English World dictionary
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