
Right-Angle Prisms
Folds a beam through 90° by total internal reflection.
Family 02 · 8 types
Precision prisms that fold, steer, invert, rotate and disperse light. Besides the eight types below, the range includes beam-splitting prisms and corner cubes.

Open a type for how it works and where it is used. Each can be made in the material and coating you need.

Folds a beam through 90° by total internal reflection.

Rotates an image: turn the prism by θ and the image turns by 2θ.

Deviates a beam by exactly 90°, even if the prism tilts, without inverting the image.

Three equal 60° angles: the classic prism for splitting light into its spectrum.

Two flat faces at a shallow angle: deviates a beam by a small, fixed angle.

Shifts a beam sideways without changing its direction or the image orientation.

A right-angle prism with a roof: turns the beam 90° and corrects the image.

A roof prism that inverts and reverses the image while folding the beam by 45°.
Retroreflectors: light is sent back towards its source, parallel to the incoming beam, over a wide range of angles.
Prism assemblies that divide one beam into two paths.
Start from a catalogue part or from your own drawing, in the material, coating and tolerance grade you need.
| Parameter | Commercial | Precision |
|---|---|---|
| Thickness | ±0.1 mm | ±0.01 mm |
| Radius | 1% | 0.5% |
| Refractive index | 0.001 | 0.0001 |
| Abbe (V-number) | 1% | 0.1% |
| Centration | 3 arc-min | 30 arc-sec |
| Tilt / wedge | 1 arc-min | 10 arc-sec |
| Surface irregularity | 1 fringe | λ/4 (0.25 fringe) |
| Surface quality (scratch-dig) | 60-40 | 10-5 |
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