A Penta Prism is a five-sided reflective prism used to scatter a light beam by 90 °. The beam reflects twice inside the prism, allowing an image to be transmitted through a right angle without inverting it (i.e., without altering the handiness of the image) as an ordinary right-angle prism would.
Penta Prism
Product Catalogue
| Part No. | |||
|---|---|---|---|
| Axh (mm) | 1 min deviation | 30 sec Deviation | 10 sec Deviation |
| 7 x 6 | PRS1100 | PRS1110 | PRS1120 |
| 10 x 10 | PRS1101 | PRS1111 | PRS1121 |
| 15 x 15 | PRS1102 | PRS1112 | PRS1122 |
| 20 x 20 | PRS1103 | PRS1113 | PRS1123 |
Specifications
| Material | BK7 |
|---|---|
| Diameter Tolerance(h) | +0.0/-0.1mm |
| Diameter Tolerance(A) | +/-0.2mm |
| Surface Quality | 60-40 scratch and dig |
| Flatness | λ/2@632.8nm |
| Reflectivity | R > 95% per face @ 630 to 680 nm |
| Coating | Aluminum and black painting are available |
| Chamfer | Protective Bevel |
Product Knowledge
Penta Prism’s essential properties are the
- The Image is neither reversed nor rotated, only deviating by 90 °.
- With the prism, a constant angle of deviation refers to all rays transmitted by the useful aperture irrespective of the angles between those rays and the optical axis (or entrance and exit face normal).
