ORTHOCHROMATIC FILM DEFINITION

You can help Wikipedia by expanding it. At one time orthochromatic films—sensitive to violet, blue, green, and yellow but not to red—were also used for general photography; now they are employed mainly for photographing of phosphor screens, such as cathode-ray tubes, and for other purposes requiring green but not red sensitivity. This work was extended by others including Josef Maria Eder , who introduced the use of the red dye erythrosine in Retrieved from ” https: Photographic film types Photography stubs. Almost all modern photographic film is panchromatic, but some types are orthochromatic and are not sensitive to certain wavelengths of light.

A panchromatic emulsion produces a realistic reproduction of a scene as it appears to the human eye, although with no colors. Kodak discontinued manufacturing general-purpose orthochromatic motion picture film in As it was insensitive to red light, the orthochromatic film passed the red rays to the panchromatic film. Archived from the original on Panchromatic plates cost two to three times as much, and had to be developed in darkness, unlike orthochromatic—which, being insensitive to red, could be developed under a red light in the darkroom. In spectral terms, orthochromasia refers to maintaining the position of spectral peaks, while metachromasia refers to a shift in wavelength, becoming either shorter or longer. Orthochromatic photography refers to a photographic emulsion that is sensitive to only blue and green light, and thus can be processed with a red safelight.

Orthochromatic film

Kodak discontinued manufacturing general-purpose orthochromatic motion picture film in The word is derived from the Greek orthos correct, uprightand chromatic color. The orthochromatic film became the blue record. As naturally prepared, silver halide emulsions are much more sensitive to blue and UV light than to green and red wavelengths. Orthochromatic photography refers to a photographic emulsion that is sensitive to only blue and green light, and thus can be processed with a red safelight.

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Chronology of Motion Picture Films, to Photographic film types Photography stubs. Unsourced material may be challenged and removed.

In biology, orthochromatic refers to the greyish staining because of acidophilic and basophilic mixture in the cell. A panchromatic emulsion produces a realistic reproduction of a scene as it appears to the human eye, although with no colors.

To some degree this could be corrected by makeup, lens filters, and lighting, but never completely satisfactorily. Panchromatic plates cost two to three times as much, and had to be developed in darkness, unlike orthochromatic—which, being insensitive to red, could be developed under a red light in the darkroom. The German chemist Hermann W.

Retrieved from ” https: Toluidine blue is an example of a partially orthochromatic dye, as it stains nucleic acids by its orthochromatic color bluebut stains mast cell granules in its metachromatic color red. In chemistryorthochromasia is the property of a dye or stain to not change color on binding to a target, as opposed to metachromatic stains which change color.

But even those solutions were unusable for additive color motion picture systems like Kinemacolor and Prizma colorwhich photographed on black-and-white stock behind alternating color filters.

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From Wikipedia, the free encyclopedia. By using this site, you agree to the Terms of Use and Privacy Policy. Archived from the original on For example, the QuickBird satellite produces panchromatic imagery having a pixel equivalent to an area 0.

Britannica does not currently have an article on this topic. A Hawker Tornado prototype fighter of WWIIwith the RAF roundel colors of chrome yellow in the outermost ring, and the red centre giving false dark gray colors from orthochromatic film usage.

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This imagery is extremely useful, as it is generally of a much higher spatial resolution than the multispectral imagery from the same satellite. Views Read Edit View history. Photographic and Digital Imaging9th ed.

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Panchromatic film – Wikipedia

Computer, device for processing, storing, and displaying information. Learn about this topic in these articles: This page was last edited on 11 Septemberat Almost all modern photographic film is panchromatic, but some types are orthochromatic and are not sensitive to certain wavelengths of light.

This article needs additional citations for verification. Orthochromatic film proved troublesome for motion pictures, rendering pink skies as perpetually overcast, blond hair as washed-out, blue eyes nearly white, and red lips nearly black. Vogel found out how to extend the sensitivity into the green, and later the orange, by adding sensitising dyes to the emulsion.

At one time orthochromatic films—sensitive to violet, blue, green, and yellow but not to red—were also used for general photography; now they are employed mainly for photographing of phosphor screens, such as cathode-ray tubes, and for other purposes requiring green but not red sensitivity.

However, his technique was not extended to achieve a fully panchromatic film until the early s, shortly after his death. Keep Exploring Britannica Computer.

definiion Computer science, the study of computers, including their design architecture and their uses for computations,…. Retrieved from ” https: From Wikipedia, the free encyclopedia.