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If you overtighten the light interference filter (LIF), NSN 5855-01-379-1410, you can crack the objective lens on you're AN/PVS-14 night vision device. Relying on the analogy that has been established between the passage of light waves through materials such as glass and the propagation of electrons as waves through semiconductors, researchers have now designed an interference filter not for light of a specified wavelength but for electrons with a certain energy. These patents cover the design of thermo-optically tunable thin-film interference filters and a fiber-optic enclosure for these filters based on the low-cost transistor outline (TO) assembly package. |
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