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Spectral Sensitivity of the Infrared Color Film

Kodak Ektachrome Infrared is a special false color slide film. Images shot on Ektachrome Infrared are created from a wider range spectrum than the human visual system can sense. The resulting image is remapped back into the visual spectrum range that we can see, creating a pseudo colored image. The following illustration shows the color sensitivity of Kodak Ektachrome Infrared film.




Images shot on Ektachrome Infrared Film can be scanned and manipulated with a digital imaging editor. The following spectral sensitivity plot shows the result of masking off the cyan (infrared layer) using the magenta and yellow layers (visible spectrum). The result is roughly equivalent to use of Kodak HS Infrared Film with an 89B filter, but without the need for the filter.



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Spectral Selectivity
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C1997 by Ed Scott - <dotted.dog@worldnet.att.net>
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