24 Apr 2008 Visi-Lid™ is an hermetic optical assembly designed to pass light at specified wavelengths. Visi-Lid™ is an optical assembly designed to pass light at specified wavelengths.
In its simplest form, the assembly consists of an A/R coated and glass metallized window of sapphire, silicon or germanium with a solder frame tack welded to the metallized portion. More complex assemblies will require the metallized windows to be sealed to a plated Kovar frame, with either a solder preform being tack welded to the kovar frames or left bare for seam sealing.
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