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n-bk7-penta-prisms
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N-BK7 Penta Prisms

The pentaprism are a 5-sided reflecting prisms allowing the deviation of a light beam by 90° for all beam entry degrees. The Penta prism produces a right handed image. It is custom used as an optical tool for defining a right angle in an optical system, due to the fact that slight movements of the prism do not affect the true right angle.
 
The reflecting surfaces are aluminized providing a mirror surface for increased efficiency. The beam reflects inside the prism twice allowing the transmission of an image through a right angle without inverting it as an right-angle prism or mirror would do.
 
The SK-Advanced N-BK7 Penta Prisms are made from precision N-BK7 for the use of variety visible light APP.

Specifications:
 
Material N-BK7
Dimension Tolerance ± 0.1mm
Surface Quality λ/4 @ 632.8nm
Surface Quality 40-20
Angular Tolerance ±3 arc min
Clear Aperture >90%
Bevelling <0.2 X 45°
Coating Custom Design





















Attributes:
No. A=B=C(mm) D(mm)
UP931K Uncoated 10.00 14.14
UP931K Coated 10.00 14.14
UP932K Uncoated 20.00 28.28
UP932K Coated 20.00 28.28
UP933K Uncoated 40.00 56.57
UP933K Coated 40.00 56.57
UP934K Uncoated 60.00 84.85
UP934K coated 60.00 84.85

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