Test Plate

Test Plate - UL-28


United Lens Company’s test plates and mirror blanks are provided to our customers as either hand crafted molded blanks or precision machined cut blanks. Details of our test plates and mirror blanks include:

  • They are manufactured in-house by our highly skilled molders and machinists from in-stock raw materials.
  • They are available in a variety of diameter sizes and ranging in thickness from 19.05mm – 83.82mm.
  • We also offer additional services to provide one side ground or curve generated. Contact us today to learn more and receive specialized pricing for further customized services.

Available on backorder

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Additional information
SKU: UL-28
Material: Borofloat 33 / Supremax 33
Diameter: 317.50mm
Thickness: 53.98mm
R1: Plano
R2: Plano

1 review for Test Plate

  1. Alan Raycraft

    I wish they made thinner and lighter blanks like Newport Glass Works used to. Most astronomers don’t need those backbreaking blanks.
    The 12.5″ is a good example. ULC could sell full thickness and a line of thinner ones. I’m sure they’d get quite a few orders for the thinner ones.

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