Corner-cube and constant-deviation prisms
Description
The corner-cube retroreflector returns all rays in the incoming direction after three reflections, independent of its own orientation.
The other prisms shown employ two reflections and have similar invariance of deviation angle to tilt in one direction only. They have the advantage of not causing image inversion and so are widely used in microscope systems etc. For a two-reflection 180° retroreflector see the Porro prisms.
The pentaprisms have very close deviation angle tolerance (10”) and have metrological uses, e.g. for setting up axes accurately at right angles.
| Item code | Type | Deviation angle | Dev. angle tolerance (±) | Aperture (mm) | Price per item (£ GBP) |
Stock available | Volume discount available |
Datasheets & customisation options |
Select amount |
|---|---|---|---|---|---|---|---|---|---|
| 45 KQ 20 | 45° constant deviation prism | 45° | 5 arc min. | 20 dia. | £61.59 | ||||
| 180 KQ 25 | Corner-cube prism | 180° | 1 arc min. | 25 dia. | £81.19 | ||||
| 90 KX 20 | Pentaprism | 90° | 10 arc sec. | 20 x 20 | £95.83 | ||||
| 90 KX 10 | Pentaprism | 90° | 10 arc sec. | 10 x 10 | £79.86 | ||||
| 180 KX 25 | Corner-cube prism | 180° | 5 arc sec. | 25 dia. | £147.14 | ||||
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