QSP Optical Technology, Inc. Step Into Defined Light! QSP is renowned for their highest quality thin film coatings and broadband protected metal coatings for glass and metal reflectors. QSP is a leading manufacturer of Dichroic Filters, Hot Mirrors, Cold Mirrors-UV and Visible; UV Filters, Color Correction Filters all utilizing the latest advancements in heat resistant glass. Metal/Dielectric Beamsplitters for projection applications are available as well as complete high temperature anti-reflection coatings for glass and low temperature processing on acrylic and polycarbonates. If you're interested in Metal Cold Mirrors for UV/VIS applications, please inquire. Additionally, quantity discounts and flex delivery price reductions are available. We look forward to assisting you with all your quality optical needs!