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TECHSPEC® components are designed, specified, or manufactured by Edmund Optics. Learn More

50.8mm Dia., 9.53mm Thick, Superpolished Laser Window Substrate

TECHSPEC® Superpolished Substrates

TECHSPEC® Superpolished Substrates

Stock #11-556
Qty 1-10
Qty 11+
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Clear Aperture CA (mm):
Substrate: Many glass manufacturers offer the same material characteristics under different trade names. Learn More
Diameter (mm):
50.80 +0.00/-0.10
Surface Quality:
Thickness (mm):
9.53 ±0.10
Laser Window Substrate
Parallelism (arcsec):
Wavelength Range (nm):
200 - 2200
Surface Flatness:
Commercial Polish
Surface Roughness (Angstroms):
≤1 RMS as measured using an optical profiler using a 20x objective at a spatial frequency bandwidth of 9 to 250 cycles per mm

Regulatory Compliance


Product Family Description

  • Superpolished on Both Surfaces with ≤1Å RMS Surface Roughness
  • Low Scatter Surfaces Ideal for UV or High Power Laser Applications
  • UV Fused Silica Substrates with Polished Bevels and Edges
  • In-House Manufacturing Enables Custom Sizes and Shapes from 6 to 76.2mm and Surface Roughness <0.5Å

TECHSPEC® Superpolished Substrates are superpolished on both surfaces to achieve superior surface specifications, including ≤1Å RMS surface roughness. The superpolished surfaces of these windows reduce scatter, making them ideal for UV or high power laser applications where scatter is a concern. The low scatter of these windows also allows for their use as substrates for ion-beam sputtering (IBS) coatings. TECHSPEC Superpolished Substrates are used in metrology applications including cavity-ring down spectroscopy, scatterometry, and in ring laser gyroscopes, as well as in UV medical applications such as eye surgery. Please contact us if your application requires a Superpolished Substrate with a custom size, if you are interested in custom coating opportunities, or to discuss how these low scatter substrates will affect your coated optic performance. Single side superpolishing is also available.

Note: Superpolished surfaces must be stored in a dry nitrogen atmosphere to retain their properties and cannot be stored for longer than 6 months.

Superpolished Optics for Minimized Scatter

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