Compare Model Drawings, CAD & Specs Diameter Thickness Availability Price
In Stock
12.7 mm 3 mm
In Stock
In Stock
25.4 mm 6.1 mm
In Stock
In Stock
50.8 mm 9.4 mm
In Stock


  • Material
    UV Grade Fused Silica
  • Antireflection Coating
  • Surface Flatness
    λ/10 at 632.8 nm over the clear aperture
  • Surface Quality
    15-5 scratch-dig
  • Thickness Tolerance
    05Q20-NL: ±0.25 mm
    10Q20-NL & 20Q20-NL ±0.38 mm
  • Chamfers
    0.25-0.76 mm face width
  • Chamfers Angle/Tolerance
    45° ±15°
  • Cleaning
    Non-abrasive method, acetone or isopropyl alcohol on lens tissue recommended. See How to Clean Optics
  • Clear Aperture
    > central 80% of diameter
  • Diameter Tolerance
    +0/-0.13 mm
  • Edge Finish
  • Thermal Expansion Coefficient
    0.52 x 10-6/°C
  • Wedge
    30 ±15 arc min


UV Fused Silica Substrates

Optically finished substrates are made to stringent standards, ready for your specialty coating. These high quality substrates have high flatness, low scratch-dig and low parallelism. Order Newport substrates to supply to custom optical coating houses to save on overall costs.

Don't see what you need?  We are happy to make substrates to your specifications. Please feel free to Contact Us!

Includes Optical Grade Jewel Box

These substrates are specially packaged with the customer in mind.  Each substrate comes in an optical grade jewel box with plastic insert.  Instead of adhering the label on the top surface, the label is placed in the inside top cover of the jewel box.  This way once the coating is applied to the substrate, the same packaging can be used again for the finished optic with a new label.