Manufacture of precision optics, specializing in Crystal Quartz Waveplates, Achromatic Waveplates, Prisms, Micro Prisms, Filters, Lenses, Mirrors, Windows, Transmission Flats and Interferometer Beam Expanders (4” to 6”). Stock and Build To Print optics and assemblies. Over 40 Years in Business. ISO 9001:2015 certified, ITAR Compliant. Cage Code 1N2U3 – Tower is a SDVOSB.