Inventors:
Gottfried Kurt Guennel - Littleton CO
Fred Charles Trusell - Littleton CO
Assignee:
Marathon Oil Company - Findlay OH
International Classification:
G01J 352
Abstract:
The color of a standard color is displayed adjacent a sample for direct comparison of the color of the sample with the color of the standard color by a method and apparatus comprising a color standard, a light source for supplying a uniform beam of light of a desired composition and intensity, means for receiving light from the light source and projecting the light onto the color standard, means for receiving light reflected from the color standard and transmitting the reflected light to a display means, and a display means for displaying the reflected light adjacent the sample to permit direct comparison of the color of the light reflected from the color standard with the color of the sample.