COLOR SPECIFICATION FOR ADDITIVE COLOR GROUP DISPLAYS.
ROME AIR DEVELOPMENT CENTER GRIFFISS AFB N Y
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Nine pairs of dichroic filters were used in a xenonsource additive color projector to determine their effects upon observer performance in a search-and-discrimination task with seven color codes. The objective was to define performance parameters preliminary to setting filter specifications. Results indicated that a blue filter, reflecting wavelengths well into the green region, facilitated performance in the majority of color codes. A red filter, close to the infrared in reflectance, reduced performance in most codes. The most efficient color code, regardless of filter, was red. Green, blue and cyan were least efficient. Recommendations were made suggesting a blue filter of approximately 516 millimicrons cutoff and a red filter with a cutoff between 581 and 595 millimicrons, for optimum observer performance in the context of a sevencolor code. Performance criteria were compared and an alternate filter option was described. Further examination of the areas around the most adequate cutoff points and alternate filter arrangements were proposed as the next step toward setting firm specifications. Author