Corner Cube Prism

Corner Cube prism has three mutually perpendicular surfaces and a hypotenuse
face.  It operates on the principle of total internal reflection(TIR).  A
beam entering the effective aperture is reflected by the three roof surfaces
and emerges from the entrance/exit surface parallel to itself. This property
is independent of direction of the retro-reflector, within acceptance angle
limitations. 
For applications in which either the acceptance angle for TIR is exceeded, or
the reflecting surfaces can not be kept sufficiently clean for TIR, a metal or
dielectric coating can be applied to the reflecting surfaces. 
Specifications:
Attribute Specification
Material: BK7 Glass
Dimension Tolerance: +0.0/-0.2mm
Deviation: 180°±3 arc second
Flatness: -λ/4 on big surface, λ /10 on other surfaces
Clear Aperture: >80%
Surface Quality: 60/40（General),10/5(High Precision)
Bevel: 0.1-0.5
Coating: Uncoated

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