Rectangular prisms are used to deflect a beam of light through 90 or 180 degrees. This can be used as component to create various optical devices. BK-7 can be used for a range between the visible and infrared light. fused-silica an be used for a range between ultraviolet and infrared light. VY Optics Photoelectric Technology Co.,Ltd. offers a wide range of different materials and different degree of precision prisms. 

Specification of our right angle prism as follow:
*Material:BK7 glass or UV grade fused silica 
*Dimension Tolerances:+/-0.1mm 
*Angle Tolerance:+/-3’or 30”  
*Clear Aperture:90% 
*Surface Quality:60/40 or 20/10 
*Surface Flatness:λ/8 or λ/4 @633nm 
*Chamfer:0.3+/-0.1mm 
*Coating Optional