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.
North American Coating Laboratories - Mentor, OHManufactures custom vacuum-deposited thin-film coatings for glass, plastic, and infrared optics, specializing in AR, reflective, ITO, conductive, metallic, filter, and scratch-resistant films. Now offering diamond-like carbon for all substrates, including severe abrasion DLC for chalcogenide material.