Penta Prisms
Penta Prisms
Penta prisms deviate a line of sight or input beam by precisely 90° without inverting or reversing the image, making them valuable for applications requiring an exact 90° deviation without having to orient the prism precisely.
- Precise 90° beam deviation
- ±30 arc sec accuracy
- Image neither inverted nor reversed
- Insensitive to alignment See All Features
Specifications
- Coating TypeProtected Aluminum with black paint overcoat
- MaterialGrade A N-BK7
- Surface Quality40-20 scratch-dig
- Surface Flatness≤λ/4 at 632.8 nm over the clear aperture
- Clear Aperture> 85% of central face
- Size Tolerance+0/-0.15 mm
- Chamfers0.25-0.50 mm face width
- Chamfers Angle Tolerance45° ±15°
- Cleaning
- Damage Threshold100 W/cm2 CW, 10 mJ/cm2 with 10 nsec pulses at 532 nm, typical
Features
Precise 90° Beam Deviation
Penta prisms deviate a line of sight or input beam by precisely 90° (±30 arc sec accuracy). 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.
Aluminized Reflecting Surfaces
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.
