Investigation of LED Point Light Source Color Visibility against Complex Multicolored Backgrounds

The US Army Research Laboratory/Human Research and Engineering Directorate has measured the amount of light humans need to barely detect different colored LEDs against a variety of militarily relevant backgrounds.

This study focused on foveal vision in steady point-sources of light, such as produced by a steady LED. As part of the study, the U.S. Army Research Laboratory used the Photo Research SpectraScan Spectroradiometer PR-740/745 series.  “Your equipment did a superb job analyzing color from our illuminated backgrounds and LED sources….It was easy to use and gave us very clear, easily understood results,” said Paul F. from the U.S. Army Research Laboratory.

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