Newports right-angle prisms are polished to tight tolerances for high precision applications. We offer substrates made of N-BK7 or UV grade fused silica. N-BK7 is recommended for general laboratory use in the visible and near IR range while UV grade fused silica is recommended for UV, infrared, or thermally sensitive applications. Newports fused silica prisms are manufactured to exact specifications and are fully functional between 185nm 2.1 µm wavelengths. Our right-angle prisms are available in a range of sizes from 3.20 mm to 50.8 mm with a selection of antireflection coatings to meet specific demands. The antireflection coatings reduce surface losses while leaving the TIR and acceptance angle unaffected. Maximum versatility is achieved by coating all faces of the prism.Right-angle prisms are typically used to redirect a laser beam or reflect incoming light. By means of total internal reflection (TIR), a right-angle prism may be used as a 90° reflector or as a 180° retro-reflector. Except for reflection losses from the entry and exit faces, TIR exhibits 100% reflectivity over a very broad wavelength range. The reflecting surface should be coated with protected aluminum if the incidence angle exceeds that acceptable for TIR or if the environment does not allow the reflecting surface to be kept clean, as TIR requires. The hypotenuse can also be used as a first surface reflector. In this case, the overcoat of black paint should be removed with acetone (applicable to BRP- series only).Newports ValuMax® right-angle prisms are ideal for beam bending and retro-reflection applications. They are often used as an alternative to mirrors when deformation of the reflective surface is undesired. A perfect balance between performance and cost makes our ValuMax® right-angle prisms the ideal choice for OEM applications in the visible and near infrared regions.