Détails
Right-angle prisms - retroreflectors are often preferable to an inclined mirror in applications involving severe acoustic or inertial loads, because they are
easier to mount, and deform much less than mirror in response to external mechanical stress. As long as acceptance angle limitations for TIR from the roof
faces are not exceeded, the right angle prisms are working as a retro reflector, turning beams back to the original direction.
