Photographic color printer
AssigneeEastman Kodak Company
InventorsHeemin Kwon, Patrick A. Cosgrove, Kenneth A. Carlson, Mark S. Leader
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Abstract
In a color photographic printer of the type having a film scanner having a 50% green spectral response between 522.+-.5 nm and 570.+-.2.5 nm and peaking at 550 nm, a lowpass cutoff filter for lowering the upper cutoff wavelength of the green channel response is added to the green channel to improve the color correction of the printer for all color films presently in use.
Claims6
In a photographic color printer of the type having a film scanner having a green channel with a 50% spectral response of 522.+-.5 nm and 570.+-.2.5 nm and a peak response of 550 nm, the improvement comprising:
- a lowpass cutoff filter in the green channel of the film scanner having a cutoff wavelength of between 555 and 565 nm.
In a photographic color printer of the type having a film scanner having a green channel with a 50% spectral response of 522.+-.5 nm and 570.+-.2.5 nm and a peak response of 550 nm, the improvement comprising:
- means for lowering the upper cutoff wavelength of the green channel by between 5 and 15 nm.
A method of modifying a photographic color printer of the type having a film scanner having a green channel with a 50% spectral response of 522.+-.5 nm and 570.+-.2.5 nm and a peak response of 550 nm, comprising the step of:
- inserting a low pass cutoff filter having a cutoff wavelength of between 555 nm and 565 nm in the green channel of the film scanner.
Dependencies are inferred from the claim text.