Corner Cubes, also known as Corner Cube Reflectors, Trihedral Retro-reflectors, Trihedral Prisms, or Corner Cube Retro-reflectors, are most commonly used for alignment because light is always reflected back towards the source. Standard sizes are listed below. Custom-made sizes and special materials are also available upon request.

Why is it called "Corner Cube"? Imagine a knife cutting diagonally across a square block of glass

and then the "three-sided pyramid" is further cut with a cylinder. The diameter of the cutting cylinder determines the size of the Corner Cube Lens:

STANDARD CORNER CUBES
Angle Tolerance (arc sec.)	M	Surface Quality (Scratch / Dig)	Dia. (mm)	Dia. Tol. (mm)	H (mm)	H Tol. (mm)	Surface Flatness	C (mm)
2,5,or 10	BK7	60/40	7.16	+0.00/-0.10	*	±0.25	1/4,1/8 wavelength	0.2
2,5,or 10	BK7	60/40	12.7	+0.00/-0.10	*	±0.25	1/4,1/8 wavelength	0.2
2,5,or 10	BK7	60/40	25.4	+0.00/-0.10	*	±0.25	1/4,1/8 wavelength	0.2
2,5,or 10	BK7	60/40	38.1	+0.00/-0.10	*	±0.25	1/4,1/8 wavelength	0.2
2,5,or 10	BK7	60/40	50.8	+0.00/-0.10	*	±0.25	1/4,1/8 wavelength	0.2
2,5,or 10	BK7	60/40	63.5	+0.00/-0.10	*	±0.25	1/4,1/8 wavelength	0.2
2,5,or 10	BK7	60/40	76.2	+0.00/-0.10	*	±0.25	1/4,1/8 wavelength	0.2

M = Material
Dia. = Diameter
Dia. Tol. = Diameter Tolerance
H = Height
H Tol. = Height Tolerance
C = Champer

*Height can be specified by customer.

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