Keystone Crystal Corporation - Manufactures and fabricates high quality cadmium telluride, cadmium zinc telluride and related single crystal substrates..
Photox Optical Systems - Supplier of a variety of non-linear, laser, scintillation and photorefractive crystals and superconductive substrates..
SHINKOSHA co., Ltd - Crystal growth and precision processing of oxide materials..
Stratophase Ltd - Supplier of nonlinear optical materials including periodically poled lithium niobate (PPLN)..