90° Right Angle Prism Mirror 20×20×20mm 1pc

The slanted surface of the right-angle prism is coated with aluminum and used as a mirror. It is used to bend the optical path by 90 degrees. Compared to flat mirrors, the metal film surface can be easily installed at 45°. Size (mm): 20 x 20 x 20 Specifications: AL + SiO coating on one side of the slope Material: BK7 Design wavelength: 587.6nm Refractive index: 1.51680/nd <Tolerance range> External dimensions: ±0.2mm Angle tolerance: ±3 minutes (3') Before coating Surface accuracy: λ/2 Surface quality: MIL60-40 Coat specifications Reflectance: R＞80% (at 587.6nm)