| NVIS Technology |
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MIL-L-85762A defines UCS coordinates for four colors:
Figure 12: CIE 1976 UCS diagram.
NVIS colors are not standard aviation colors, but are particular to NVIS because of the limits on NR. Class A red is not allowed because red falls within the Class A NVIS response and would cause unacceptable NR.
Korry has devoted extensive research and development to provide the richest, most readable NVIS colors within the limitations imposed by MIL-L-85762A. In the two most difficult cases, Class A yellow and Class B red, Korry displays are as yellow and as red as technically possible. For color specifications of various Nightshield filter applications, click here.
Green A and B for both Class A and B NVIS are the simplest to design because the green wavelengths are far enough from the Class A and B NVIS response curves that they don't incur an NR penalty (figure 13). At the same time, they are in the band of maximum photopic response, so it takes relatively less energy to produce high luminance. There are few conflicts between meeting color, luminance, and NR specifications. In general, the same situation holds for Class B yellow.
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