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Interferometry Windows

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Single Surface Optical Flats Single Surface Optical Flats
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
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  • Sizes Ranging from ½" Diameter to 12" Diameter
  • Each λ/20 Flat 75mm and Larger Includes a Certificate of Calibration
  • Available with Standard Metallic Mirror Coatings: λ/10 and λ/20 Mirrors
Spherical Aberration Compensation Plates Spherical Aberration Compensation Plates
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
  • Precision N-BK7 Substrate
  • Optimized for Use in Collimated Light with Small Fields of View
  • Transmitted Wave Front Accurate to λ/16
Precision Dual Surface Optical Flats Precision Dual Surface Optical Flats
TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More
Top Seller
  • λ/10 and λ/20 Surface Flatness Options
  • Each λ/20 Flat 76.2mm and Larger Includes a Certificate of Calibration
  • Extended Lifetime in Contact Measurement Applications
  • Single Surface Optical Flats Also Available
Featured Resources
 Application Note
Diffuser Selection Guide
Diffuser Selection Guide


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Interferometry Windows are used to measure the flatness of optical surfaces or certain optical components to ensure accuracy for a wide range of quality assurance or inspection applications. Interferometry Windows are optical surfaces that have been polished to an extremely precise level of flatness which are used as reference plates. Interferometry Windows are laid atop inspected surfaces at a specific angle while a laser beam is directed between them so that interference bands may be measured to determine flatness levels. Dual or single surface Interferometry Windows are both available.

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