MIL-DTL-13455E
3.2 Materials. Materials used shall be in accordance with the manufacturer's materials
specifications for the light filter. The materials shall be capable of meeting all of the operational
and environmental requirements specified herein.
3.2.1 Corrosion control. When applicable, the light filter shall be fabricated from
compatible metals or materials that are inherently corrosion resistant or are permanently treated to
prevent forms of corrosion and deterioration which affect system performance (see 4.5.1).
3.3 Design and construction. The design and construction of the light filter shall be
fabricated and assembled to the form and dimensions shown on Drawing 12314082 and as
specified herein (see 4.3 and 4.5.1).
3.3.1 Mounting equipment. Filters shall be furnished with mounting equipment. The
mounting equipment shall conform to applicable drawings or specified requirements and shall be
free from defects affecting the appearance or serviceability of the installed filters (see 4.3
and 4.5.1).
3.4 Performance.
3.4.1 Optical characteristics.
3.4.1.1 Spectral transmission. The emission transmitted by the light filter, of any vehicle
interior or exterior light source, which may be illuminated (including warning lights) in the
blackout mode, shall be limited to the visible spectrum (380 to 700 millimicrons) as shown in
figure 1. No energy shall be emitted in the 700 to 1200 millimicron portion of the electro-
magnetic spectrum (see 4.5.3).
3.4.1.1.1 Selectivity. Light filters shall have the following transmission characteristics
(see 4.5.2.1):
a. 50 percent (%) transmission at some point within the range of 620 to
640 millimicrons inclusive.
b. Less than 1% transmission at all points within the range of 360 to 580 millimicrons
inclusive.
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