Optics: measuring and testing – Photometers – Photoelectric
Patent
1992-03-23
1994-06-14
Rosenberger, Richard A.
Optics: measuring and testing
Photometers
Photoelectric
348191, G01J 142, H04N 1702
Patent
active
053214943
ABSTRACT:
A subtractive measurement technique in which a CRT display light intensity output is biased above a noise range of a low cost sensor by turning on one or more electron beam guns to produce light levels above the noise range. A bias value is measured. Electron beam guns for colors other than the color being measured are turned on. The gun for the color to be measured is then incremented through its operating range and measured light intensity values at each step are obtained using the sensor. The bias value is subtracted from the measured values to obtain the actual light intensity values for the color primary control value to luminance transfer curve being characterized.
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Donahue Timothy F.
Fulmer James W.
Close Thomas H.
Dudley Mark Z.
Eastman Kodak Company
Pham Hoa Q.
Rosenberger Richard A.
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