Sales engineer
Arminas Butkus +370 5 219 4884
Penta prisms
Please fill out this field
Please fill out this field
Please fill out this field
Please fill out this field
Please fill out this field

One of our 4Lasers team members will contact you as soon as possible.

Go back to homepage

Penta prisms

Main features


  • Fabricated from high-quality BK7 glass
  • 90° ± 1 arcmin deviation
  • Does not invert, reverse beam or image
  • <λ/[email protected],8 nm surface flatness over clear aperture
  • Antireflective coatings on input and output faces, custom substrate material and dimensions upon request


Application examples


  • Beam steering
  • Optical system alignment
Request custom
  • Description
  • Drawing
  • Standard specifications

4Lasers unmounted penta prisms provide 90° beam and image deviation without inverting or reversing the image. Penta prisms reflecting surfaces are aluminized with inconel and black paint overcoat, while input and output faces are uncoated (refer to the drawing). An important feature is that these prisms do not have to be precisely aligned to operate properly. For this reason these five-sided reflecting design prisms are essential for applications, where precise 90° deviation is required. To optimize particular application optical transsmision antireflective coatings have to be applied. Contact us for coating service, custom solutions and pricing.

Penta prisms
Beam deviation 90˚± 1 arcmin
Wavelength range Uncoated BK7 prisms: 350 nm - 2 μm
Clear aperture >70% of face length and width
Dimensions tolerance ±0,1 mm
Angular tolerance ±1 arcmin
Protective chamfers <0,35 mm at 45°
Surface quality 40-20 S-D
Surface flatness <λ/[email protected],8 nm over clear aperture
Coatings Reflecting surfaces: aluminized with inconel and black paint overcoat;
Input and output surfaces: uncoated
Order your item
Material Face dimensions SKU PRICE QUANTITY
10x10 mm
29 €
20x20 mm
60 €
40x40 mm
79 €
60x60 mm
120 €