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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
25mm Aluminized, Half-Penta Prism

Stock #65-590
Qty 1-5
Qty 6
Volume Pricing
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Width (mm):
Height (mm):
VIS 0° & Aluminized
Angle Tolerance (arcmin):
Protective bevel as needed
Coating Specification:
Entrance/Exit Faces: Ravg ≤0.4% @ 425 - 675nm
Reflecting Surface: Ravg >85% @ 400 - 700nm w/Black Overpaint
Dimensional Tolerance (mm):
Image Orientation:
Ray Deviation (°):
Surface Flatness:
Surface Quality:
Half-Penta Prism
Wavelength Range (nm):
425 - 675

Regulatory Compliance


Product Family Description

  • Deviates Line of Sight by 45°
  • Combine with Schmidt Prism to Create Pechan Prism
  • Penta Prisms Also Available

Half-Penta prisms are used to deviate the line of sight by 45° without inverting or reverting the image. The reflecting surface is aluminized and over-coated with Inconel and black paint to increase efficiency. Combining a TECHSPEC® Half-Penta Prism with a corresponding size TECHSPEC® Schmidt Prism creates a Pechan prism pair. The Pechan prism pair will invert or revert the image while not deviating the line of sight. It can be used with converging or diverging light for system size reduction.

Technical Information

Stock No. A B C D
#65-587 10.00mm 10.82mm 2.07mm 14.14mm
#65-590 25.00mm 27.06mm 5.18mm 35.35mm

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