Human color vision and the unsaturated blue color of the daytime sky

American Journal of Physics

Volumn 73, Issue 7, 2005, Pages 590-597

  Smith, Glenn S ^a  

^a GEORGIA INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 24144468901     PISSN: 00029505     EISSN: None     Source Type: Journal    
DOI: 10.1119/1.1858479     Document Type: Review

References (41)

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36. The lamps required modifications to make their performance acceptable. Spaces around the filter holders had to be covered to prevent the leakage of unfiltered light. The holders for the bulb, filter, and lens had to be adjusted to align the axes for these three elements. Before this alignment, the illuminated disk produced by superimposing the beams from two lamps was not uniform in color. The bulbs in the three lamps were replaced with the model described in the text.
37. When the reflector of one of these bulbs is viewed with the power off, it has a blue hue.
38. It is important to realize that we are only adjusting the irradiance of the monochromatic blue light relative to that of the white light to match the ratio of irradiances for skylight. We cannot adjust the overall irradiance of the mixture to equal that of skylight, because the maximum irradiance for the white light is fixed by the output of the bulb.
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