product information: Material: H-K9 optical glass material Size: about 10*10*10mm/0.39*0.39*0.39in Angle: 45 degrees, 90 degrees, 3 Dimensional tolerance: 0.1MM Face shape: /4 Finish: 40-20 Effective aperture: >90% Beam Distortion: +/- 2arc min Coating: Bevel: Partially Reflective Film Incident surface, exit surface: anti-reflection coating Uses: Widely used in instrumentation, video testers, projectors, vision systems, mold detection, automation equipment, etc. Features: One of the basic functions of a right angle prism is that it can effectively totally reflect internal incident light through the critical angle characteristic. When a right angle prism is used, some optical film is usually applied. Large contact area, with typical angles of 45 and 90, easier to install than ordinary mirrors, and has better stability and mechanical stress strength. It is the best optics for all types of equipment and instruments. Delivery Contents: 1x Right-Angle Equilateral Triangular Prism (Only the above package contents, excluding other products)