MIL-DTL-24560A(SH)
3.5.2
Glassware.
3.5.2.1 Light output. Unless otherwise specified (see 3.1) the light
output shall be as specified in 3.5.2.1.1 through 3.5.2.1.3 (see 4.4.2.1).
3.5.2.1.1 Class l - Fresnel type lens. Class l glassware shall have a
minimum luminous intensity of 94 candelas for clear (colorless), and 12
candelas for red, green, and yellow from 5 degrees above to 5 degrees below
the horizontal axis of the central zone of the bull's eye. At least 60
percent of the required minimum intensity shall be present from 7.5 degrees
above to 7.5 degrees below the horizontal axis (see 4.4.2.l(a)).
3.5.2.1.2 Class 2 - Globe, roundel, and lens. Class 2 glassware shall
have a minimum luminous transmittance of 17.5 percent for red, 40 percent for
yellow, 20 percent for green, 2 percent for blue, and 85 percent for clear
(colorless) when specimens are tested using CIE illuminant A (see 4.4.2.1(b)).
3.5.2.1.3 Class 3 - Fresnel globe. Class 3 glassware shall have a
minimum luminous intensity of 94 candelas for clear (colorless), 12 candelas
for red, green, and yellow and 4.5 candelas for blue from 5 degrees above to 5
degrees below the horizontal axis of the central zone of the bull's eye. At
least 60 percent of the required minimum intensity shall be present from 7.5
degrees above to 7.5 degrees below the horizontal axis (see 4.4.2.l(c)).
3.5.2.2 Color (chromaticity). Unless otherwise specified (see 3.1),
the chromaticity in CIE coordinates of the class 1, 2, and 3 glassware shall
be as specified in 3.5.2.2.1 through 3.5.2.2.5, when installed in the
appropriate light fixture (see 4.4.2.2).
3.5.2.2.1 Red transparent. Red transparent color shall fall within
the areas bounded by the spectrum locus and the following coordinates (see
figure 1):
X
0.680
0.660
0.735
0.721
Y
0.320
0.320
0.265
0.259
3.5.2.2.2 Yellow transparent. Yellow transparent color shall fall
within the areas bounded by the spectrum locus and the following coordinates
(see figure 1):
X
0.612
0.618
0.575
0.575
Y
0.382
0.382
0.425
0.406
3.5.2.2.3 Green transparent. Green transparent color shall fall within
the areas bounded by the spectrum locus and the following coordinates (see
figure 1):
X
0.028
0.009
0.300
0.203
Y
0.385
0.723
0.511
0.356
3.5.2.2.4 Blue transparent. Blue transparent color shall fall within
the areas bounded by the spectrum locus and the fo1lowing coordinates (see
figure l):
X
0.148
0.232
0.060
0.170
Y
0.025
0.167
0.230
0.230
3.5.2.2.5 Clear (colorless) transparent. Clear transparent color shall
fall within the areas bounded by the spectrum locus and the following
coordinates (see figure 1):
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