MIL-PRF-22885/54E
REQUIREMENTS:
Design and construction: See figure 1. Color filters shall be capable of mating with pushbuttons in accordance with
MIL-PRF-22885/52.
Temperature characteristic: 1 (-55°C to +85°C).
Color and luminance: See table I.
Part or Identifying Number (PIN): See table II.
Qualification inspection: As a part of illuminated push button switch assembly, MIL-PRF-22885/56 or
MIL-PRF-22885/86.
TABLE I. Chromaticity limits and photometric brightness.
Switch photometric brightness
Chromaticity limits 1/
Color
Color
(foot-lamberts) 2/
2360° Kelvin
code
minimum
x
y
.280
.210
.280
.330
35
Blue
B
.420
.330
.420
.210
.610
.230
.540
.350
150
Green
G
.580
.380
.660
.280
.285
.695
SL 3/
.703
Red
R
150
.655
.325
.660
SL 3/
.390
.490
.420
.490
150
White
W
.410
.535
.435
.535
.410
.565
SL 3/
.580
Yellow
Y
150
.540
.435
.550
SL 3/
1/ The chromaticity of the assembled illuminated display, expressed as x and y
coordinates on the CIE chromaticity diagram, shall lie within areas bounded by
the coordinates listed for each color, using a source illuminate of 2360°K.
2/ Switch photometric brightness, when viewed from the front of the applicable
pushbutton display and using midget flange, T-1 ¾ incandescent lamps
operated at a .34 ±.02 MSCP.
3/ SL = Spectrum locus(where intersected by other coordinate pair).
2