Short Wave Pass Filter for 8-12um

Short wavepass filters are designed to achieve efficient separation of adjacent spectral bands. The cut-off edge of the filter may be located between 0.85 and 13 microns.

Substrate: Germanium

Transmission: Typically >85% at wavelengths shorter than the cut-off edge. Extent of transmission region is typically in the ratio of 2:1

Attenuation: Typically <0.1% outside the passband.

Edge Slopes: Typically between 3% and 5%

Environmental

Adhesion MIL-C-48497A, 08/09/1980, para 4.5.3.1

Tape test

Abrasion MIL-C-48497A, 08/09/1980, para 4.5.3.3

Moderate, 50 strokes with a cheesecloth

Humidity MIL-C-48497A, 08/09/1980, para 4.5.3.2

24hrs, 48^o, 95% relative humidity