Retroreflectors (Trihedral Prisms) – Deviation, Displacement
Also called corner cubes, these prisms are made of solid glass that allow the entering rays to emerge parallel to itself, only in the opposite direction of propagation, regardless of the orientation of the prism. Corner Cube Retro Reflector operates on the principle of Total Internal Reflection (TIR), the reflection is insensitive to the incident angle, even when the incident beam enters the prism off normal axis, there will still be a strict 180° reflection. This is useful when precision alignment is difficult and a mirror would not be applicable.
Common Specifications
Transmission Regions & Applications
| Parameters |
Ranges & Tolerances |
| Substrate Material |
N-BK7 (CDGM H-K9L) |
| Type |
Retroreflector Prism (Corner Cube) |
| Diameter Tolerance |
+0.00 mm/-0.20 mm |
| Height Tolerance |
±0.25 mm |
| Angle Tolerance |
+/- 3 arcmin |
| Deviation |
Up to 180° ± 5 arcsec |
| Bevel |
0.2 mm x 45° |
| Surface Quality (scratch-dig) |
60-40 |
| Clear Aperture |
> 80% |
| Surface Flatness |
< λ/4 @ 632.8 nm for big surface, < λ/10 @ 632.8 nm for small surfaces |
| Wavefront Error |
< λ/2 @ 632.8 nm |
| AR Coating |
As per the requirements |
If your project demands any prism we are listing or another type such as littrow prisms, beamsplitter penta Prisms, half-penta prisms, porro prisms, roof prisms, schmidt prisms, rhomhoid prisms, brewster prisms, anamorphic prism pairs, pallin broca prisms, light pipe homogenizing rods, tapered light pipe homogenizing rods, or a more complex prism, we welcome the challenge of solving your design needs.
