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It has three mutually perpendicular surfaces and a hypotenuse face. Light entering through the hypotenuse is reflected by each of the three surfaces in turn and will emerge through the hypotenuse face parallel to the entering beam regardless of the orientation the incident beam. For its special performance, it is often used to the distance measurement, optical signal process and laser interferometer.

Specification for standard Corner Cube Retroreflector:
Material: BK7 Grade A optical glass
Dimension Tolerance:+0,-0.2mm
Flatness: λ/4 @ 632.8 nm
Surface Quality: 60- 40 scratch and dig
Clear Aperture: >80%
Bevel: 0.2 mm to 0.5 mm x 45o
Deviation: 180o ±3 arc sec
Flatness:λ/4 @632.8 nm on big surface
                 λ/10 @632.8 nm on other surface
Wavefront Distortion:λ/2 @632.8

Part No.	? (mm)	h (mm)
CCR0101	15.0	11.3
CCR0201	25.4	19.0
CCR0301	38.0	28.5