Cube-corner Prism

It is a type of internal total reflection prism manufactured based on the principle of critical angle, which reflects incident light by 180° regardless of the incident angle. That is to say, any incident light ray entering the clear aperture will be efficiently reflected back in its original direction. 

Due to the special properties of the cube-corner prism , it is often used in measurement systems, optical signal processing, and laser interferometers.

 A cube-corner prism is a glass component used for retroreflection, which reflects the incident light beam with three 90° angles. The errors in these glass angles must be within a few seconds of precision, but the incident surface can have errors of more than 5″ without significantly affecting the performance of the corner cube prism. 

Material: BK7 Glass

Dimensional tolerance: +0, -0.2mm

Surface figure: λ/4 @ 632.8 nm

Finish: 60-40 scratch and dig

Effective aperture: >80%

Edge bevel: 0.2 mm to 0.5 mm x 45°

Combined angle accuracy: 180° ±3 arc sec

Wavefront distortion: λ/2 @ 632.8 nm