Sterling Precision Optics Inc. - Evanston, ILManufactures optical components including filters, lenses, mirrors, and windows. Stocks optical glass, color filter glass, and fused silica. In-house tempering, coating, and custom machining. Other products include prisms, beamsplitters, cylindrical lenses, wedges, rods, tubes, reflectors, and optical assemblies.
IRD Glass - Litchfield, MNCustom and OEM precision glass, spinel, ceramic, and optical components including spherical and cylindrical lenses, prisms, windows, mirrors, wedges and reticles. Optical assembly and subassembly capabilities and optical thin-film coating capabilities from UV to IR.
Advanced Optics Inc. - Pewaukee, WIAdvanced Optics manufactures custom optics, precision optics, as well as off-the-shelf optical mirrors, optical windows, optical flats, optical filters, and optical lenses from prototype to production. We carry a wide range of substrates in-house, precision polish up to lambda/20 and provide custom fabrication and coatings.