Rainbow Research Optics has over 15 years experience, you can count on. They specialize in custom optics. Rainbow Research Optics provides optics with tremendous precision and coatings that will meet your requirements. They offer spherical lenses, mirrors, windows, and prisms, as well as wave plates, Beam splitter cubes, high damage coatings, and thin film polarizers. Visit www.rainbowoptics.com for more information..