DescriptionSpecifications
Models
Catalog PDF
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Penta prisms deviate a line of sight or input beam by precisely 90°. In imaging applications the penta prism will neither invert nor reverse the image. These prisms deviate a beam through the same angle regardless of its orientation to the beam. This makes penta prisms valuable for applications requiring an exact 90° deviation without having to orient the prism precisely. The monolithic design of a penta prism also makes it inherently more stable than a system consisting of two mirrors.
Penta prisms are available in 12.7 and 25.4 mm sizes. The geometry of these prisms requires the reflecting surfaces to be coated. The reflecting surfaces of our penta prisms are coated with protected aluminum with a black paint overcoat. The entrance and exit faces are uncoated but can be antireflection coated. Please contact Newport if you require an antireflection coating. |
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Specifications
| Material | BK 7, grade A, fine annealed optical glass or equivalent |
| Surface Flatness | ≤λ/4 at 632.8 nm over the clear aperture |
| Clear Aperture | Central diameter, > 85% of dimension |
| Surface Quality | 40-20 scratch-dig |
| Beam Deviation | 90° ± 30 arc sec |
| Dimensions | +0/-0.15 mm |
| Chamfers | 0.25-0.50 mm face width x 45° ±15° |
| Coating Protection | Protected aluminum with black paint overcoat |
| Cleaning | Non-abrasive method, acetone or isopropyl alcohol
on lens tissue recommended (Unknown type Newport.Step.Product.XRefElement) |
| Damage Threshold | 100 W/cm2 CW, 10 mJ/cm2 with 10 nsec pulses at 532 nm, typical |