60 x 60 x 49mm
Optical Material: BK7 optical glass
Rear and sides are aluminized and have anti-reflection coatings for high
reflection.Back & sides are blackened to reduce stray light & interference.
60/40 scratch/dig quality
Surface Flatness: λ/8

These corner cube retroreflectors (trihedral prisms) will reflect the beam
entering it, directly back to its source, regardless of the angle the beam
relative to prism's orientation.
Used in surveying, precision alignment, and more.
There are three total internal reflections within the corner cube.