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Data on relative-energy Jλ of tungsten lamp at color temperature of 2680°K, relative visibility Vλ of radiant energy and transmission-factors Tλ of color-filters at various wave lengths λ.
Values of Relative Visibility recently adopted by the American Engineering Standards Committee.
Table 2
Transmission-factors of five color-filters as computed by use of four sets of spectral visibility data, and as observed by use of the flicker photometer.
Color Difference Taken in two Steps.
Color Difference Taken in one Step.
Table 3
Relative transmission-factors of five color-filters as observed by the flicker photometer and as computed from spectrophotometry data, spectral energy, values at color temperature 2680°K and various visibility data.
Visibility Data By
Transmission-Factors Relative to Values Observed by Flicker Photometer
Ruby
Light Red
Amber
Green
Blue
Coblentz and Emerson
125.5
113.3
105.6
90.4
89.7
Hyde, Forsythe and Cady
109.3
103.9
101.6
94.8
93.6
Gibson and Tyndall
120.5
109.3
103.3
92.4
93.6
Amer. Eng. Standards Comm.
118
108.2
103.3
92.8
93.0
Observed by Flicker Photometer
100
100
100
100
100
Tables (3)
Table 1
Data on relative-energy Jλ of tungsten lamp at color temperature of 2680°K, relative visibility Vλ of radiant energy and transmission-factors Tλ of color-filters at various wave lengths λ.
Values of Relative Visibility recently adopted by the American Engineering Standards Committee.
Table 2
Transmission-factors of five color-filters as computed by use of four sets of spectral visibility data, and as observed by use of the flicker photometer.
Color Difference Taken in two Steps.
Color Difference Taken in one Step.
Table 3
Relative transmission-factors of five color-filters as observed by the flicker photometer and as computed from spectrophotometry data, spectral energy, values at color temperature 2680°K and various visibility data.
Visibility Data By
Transmission-Factors Relative to Values Observed by Flicker Photometer