Right Angled Prisms from Casix
Right Angled Prisms from Casix
A right-angle prism is used as a mirror to deviate light through 90 degrees and also as a retro-reflector to deflect light through 180 degrees by total internal reflection
90 degree deflection
90 degree deflection occurs at the face. The hypotenuse image is erected and reversed
180 degree deflection
180 degree deflection uses the hypotenuse as the entrance and exit face. The main application is as a retro-reflector provided that the plan of incident beam includes the vertex
| Attribute | Commercial | High Precision |
|---|---|---|
| Material | N-BK7, Fused Silica and other optical glass | |
| Dimension Tolerance | +0.0, -0.2mm | +0.0, -0.05mm |
| Clear Aperture | >85% | >90% |
| Angle Tolerance | ±30” | ±5” |
| Flatness | Per 25.4mm λ/4@632.8nm | Per 25.4mm λ/10@632.8nm |
| Surface Quality | 60-40 scratch and dig | 20-10 scratch and dig |
| Protective Bevel | (0.2-0.5) × 45° mm | (0.05-0.2) × 45° mm |
Beam steering
Retro-reflection
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Photonic Solutions Ltd
Unit 2.2 Quantum Court
Heriot-Watt University Research Park
Edinburgh
EH14 4AP
