Penta prism can deviate an incident beam without inverting or reversing to 90. The deviation angle of 90 is independ- ent ofany rotation of the prism about an axis parallel to the line of intersection of the two reflecting faces. It is commonly used in Plumb Level, Surveying Alignment Rangefinding and Optical Tooling.
Now Hontec Optics can provide penta prisms from 5mm to 30mm size. Special size can also be offered upon re- quest.
