Difference between revisions of "Orthochromatic"
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| − | '''Orthochromatic''' ("correct colors") photographic emulsion is early film emulsion, sensitive to wider range of colors than original color-blind (blue sensitive) emulsion. | + | '''Orthochromatic''' ("correct colors") photographic emulsion is early black and white film emulsion, sensitive to wider range of colors than original color-blind (blue sensitive) emulsion. |
| − | Orthochromatic emulsion has too high sensitivity to blue, generally correct sensitivity to green and bright yellow, but has too low sensitivity to orange and is practically insensitive to red. | + | Orthochromatic emulsion still has too high sensitivity to blue, but generally correct sensitivity to green and bright yellow, but has too low sensitivity to orange and is practically insensitive to red, as it does not register wavelengths longer than approximately 560-600 nm (medium yellow to orange). Furthermore, orthohromatic emulsion has decreased sensitivity in the 500 nm area (pale blue), as compared to color-blind emulsion, and so it reproduces brightnes of blue color more accurately. |
The next step in development of color sensitivity was [[panchromatic]] emulsion. | The next step in development of color sensitivity was [[panchromatic]] emulsion. | ||
Revision as of 18:48, 19 March 2009
Orthochromatic ("correct colors") photographic emulsion is early black and white film emulsion, sensitive to wider range of colors than original color-blind (blue sensitive) emulsion.
Orthochromatic emulsion still has too high sensitivity to blue, but generally correct sensitivity to green and bright yellow, but has too low sensitivity to orange and is practically insensitive to red, as it does not register wavelengths longer than approximately 560-600 nm (medium yellow to orange). Furthermore, orthohromatic emulsion has decreased sensitivity in the 500 nm area (pale blue), as compared to color-blind emulsion, and so it reproduces brightnes of blue color more accurately.
The next step in development of color sensitivity was panchromatic emulsion.
