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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
12.7mm Silver Coated, Corner Cube Prism

N-BK7 Corner Cube Retroreflectors

Stock #45-202
Qty 1-5
Qty 6
Volume Pricing
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Diameter (mm):
12.70 +0.0/-0.1
Height (mm):
10.16 + Black Overpaint adds 30-60μm
Protected Silver (450-10000nm)
Beam Deviation (arcsec):
Protective bevel as needed
Clear Aperture (%):
Coating Specification:
Reflective Surfaces: Ravg >98% @ 500 - 800nm, Ravg >98% @ 2 - 10 μm w/Black Overpaint
Height Tolerance (mm):
Image Orientation:
Black Overpaint is 30-60μm Thick
Ray Deviation (°):
Surface Flatness:
Surface Quality:
Typical Energy Density Limit:
Entrance: 0.5 J/cm2 @ 532nm & 1064nm, 10ns
Wavelength Range (nm):
400 - 2200

Regulatory Compliance


Product Family Description

  • Incident Light is Reflected Back to the Source
  • Down to 3 Arcsecond Beam Deviation
  • Useful for Surveying and Alignment
  • Also Available Mounted

TECHSPEC® N-BK7 Corner Cube Retroreflectors are designed to reflect any ray or beam entering the prism face, regardless of the orientation of the prism, back onto itself. A mirror will do that only at the normal incidence. As a result, corner cube retroreflectors are useful where precision alignment is impossible or time-consuming. TECHSPEC® N-BK7 Corner Cube Retroreflectors are available with the dihedral surfaces either uncoated or coated with silver. The silver coating provides a larger acceptance angle while the uncoated option, which relies on total internal reflection, provides optimum reflectivity. The input face is available uncoated or coated with an antireflection coating optimized for either visible wavelengths or near infrared wavelengths, including 1064nm and 1550nm.

Laser Optics

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