Cold Weather Goggles. 6. Effectiveness of Yellow Filters
NAVAL SUBMARINE MEDICAL RESEARCH LAB GROTON CT
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The visibility of bright and dark targets was compared when viewed through yellow filters whose excitation purity ranged from 0.06 to 0.98 as well as a neutral filter and whose total transmittances had been roughly equated. The visibility of large bright targets was enhanced by all the yellow filters but only to a very small degree. The visibility of the dark targets was also slightly enhanced, but these differences were not statistically significant. The color perception of both color normals and red-green dichromats was not affected by yellow filters whose excitation purity was less than 0.20.
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