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All Products / Optics / Prisms / Penta Prisms / N-BK7 Penta Prisms
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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

20mm, MgF2 Coated, Penta Prism

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Stock #31-051 3-4 days
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£89.25
Qty 1-5
£89.25
Qty 6+
£71.40
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Coating:
MgF2 & Aluminized
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
N-BK7
Length (mm):
20.00
Surface Quality:
60-40
Type:
Penta Prism
Dimensional Tolerance (mm):
±0.10
Bevel:
Protective bevel as needed
Length of Legs (mm):
20.00
Image Orientation:
Right-Handed
Coating Specification:
Entrance/Exit Faces: Ravg ≤1.75% @ 400 - 700nm
Reflecting Surfaces: Aluminized, Inconel & Black Paint
Ray Deviation (°):
90
Wavelength Range (nm):
400 - 700
Damage Threshold, By Design: Damage threshold for optical components varies by substrate material and coating. Click here to learn more about this specification.
Entrance & Exit Faces: 10 J/cm2 @ 532nm, 10ns
Reflecting Surfaces: 0.3 J/cm2 @ 532 & 1064nm, 10ns
Beam Deviation Tolerance (arcmin):
±5
Power (fringes) @ 632.8nm:
1.00
Irregularity (fringes) @ 632.8nm:
0.25

Regulatory Compliance

RoHS 2015:
Compliant
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Reach 223:
Compliant
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Certificate of Conformance:
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Product Family Description

  • Ray Deviation of 90°
  • Right Handed Image
  • Optical Tool for Defining a Right Angle
  • Additional Penta Prism Options Available

TECHSPEC® N-BK7 Penta Prisms are five-sided prisms featuring a ray deviation of 90° and a right-handed image. The reflecting surfaces are aluminized. Slight movement of the prism does not affect the true right angle at which light rays are reflected, making a penta prism the ideal optical tool for defining a right angle in an optical system. TECHSPEC® N-BK7 Penta Prisms are made from precision N-BK7 for use in a variety of visible light applications. These prisms are offered with a VIS 0º or MgF2 coating, in a variety of sizes. 

Penta Prism Ray Path
Penta Prism Ray Path
Penta Prism Tunnel Diagram
Penta Prism Tunnel Diagram

Technical Information

TECHSPEC® Penta Prism Dimensions
Stock No. Coating Dimensions
A B
#85-159 VIS 0° 0.50 0.60
#85-160 VIS 0° 1.00 1.20
#45-112 MgF2 5.00 6.10
#48-595 VIS 0°
#32-030 MgF2 10.00 11.95
#48-596 VIS 0°
#43-502 MgF2 15.00 15.96
#48-597 VIS 0°
#31-051 MgF2 20.00 21.65
#48-598 VIS 0°
#42-779 MgF2 25.00 27.90
#47-458 MgF2
#48-599 VIS 0°
#45-073 MgF2 30.00 32.47
#48-600 VIS 0°
#45-402 MgF2 35.00 37.88
#48-601 VIS 0°
#45-674 MgF2 40.00 43.30
#48-602 VIS 0°
#45-675 MgF2 45.00 48.71
#48-603 VIS 0°
#45-676 MgF2 50.00 54.12
#47-459 MgF2
#48-604 VIS 0°
N-BK7 Penta Prisms