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Penta prisms

Main features

Fabricated from high-quality BK7 glass
90° ± 1 arcmin deviation
Does not invert, reverse beam or image
<λ/10@632,8 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/10@632,8 nm over clear aperture
Coatings	Reflecting surfaces: aluminized with inconel and black paint overcoat; Input and output surfaces: uncoated