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BK7 Discs

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BK7 is a pure optical borosilicate-crown glass material and is a high quality choice for a window, substrate or wafer. Mainly for the visible spectrum and near IR it is supplied for industrial, medical and high precision lower power laser applications with AR coatings applied for increased transmission.

BK7 windows are used to protect elements and optical enclosures between two environments, they are made from large blocks of stocked glass so can be polished to a wide size range.

For inquiries or to place an order, please reach out to our dedicated sales team.

Buy direct from stock
Get a quote for specific requirements

Option A

  • Material:
  • Schott• N-BK7
  • Diameter Tolerance:
  • +0.00/-0.20mm
  • Thickness Tolerance:
  • ± 0.10mm
  • Edge Finish:
  • Fine ground
  • Surface Quality:
  • NA
  • Surface Flatness:
  • ≤ 5 Fringes (@633nm)
  • Parallelism:
  • ≤ 3 arc sec

Option B

  • Material:
  • NA
  • Diameter Tolerance:
  • NA
  • Thickness Tolerance:
  • NA
  • Edge Finish:
  • NA
  • Surface Quality:
  • NA
  • Surface Flatness:
  • NA
  • Parallelism:
  • NA
  • Dimensions:
  • Diameters 3mm to 300mm Squares/Rectangles 1mm x 1mm to 300mm x 500mm
  • Thickness Range:
  • 0.10 to 50mm (subject to dimension)
  • Dimension/Thickness:
  • Tol up to 0.02mm
  • Edge Finish:
  • N/A
  • Surface Quality:
  • 80/50 to 20/10 scratch/dig
  • Surface Flatness:
  • 60/40
  • Parallelism:
  • Up to 10 seconds
  • Material Options:
  • N/A
  • Coating Options:
  • AR single layer, multi layer & V coatings
  • Options:
  • Drilled holes, edges polished, bevelled angles, wedges & shapes

Buy direct from stock…

For discount pricing for stock parts over 10+ and volume/OEM quantities, please request a quote, where you can upload drawings and specifications. You can also add the below items to the quote by selecting 11 or more and clicking add to quote.
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Part No.

  • N-BK725x1

Description

  • N-BK7 Discs

Diameter

  • 25mm

Thickness

  • 1mm

Quantity

Unit Price (1-10) excl. VAT

£9.00

* You have selected 10+ stock parts. Please add to quote for discount pricing over 10+ and volume/OEM quantities.

Download Datasheet PDF

Part No.

  • N-BK725x2

Description

  • N-BK7 Discs

Diameter

  • 25mm

Thickness

  • 2mm

Quantity

Unit Price (1-10) excl. VAT

£9.50

* You have selected 10+ stock parts. Please add to quote for discount pricing over 10+ and volume/OEM quantities.

Download Datasheet PDF

Part No.

  • N-BK725x3

Description

  • N-BK7 Discs

Diameter

  • 25mm

Thickness

  • 3mm

Quantity

Unit Price (1-10) excl. VAT

£10.50

* You have selected 10+ stock parts. Please add to quote for discount pricing over 10+ and volume/OEM quantities.

Download Datasheet PDF

Part No.

  • N-BK750x3

Description

  • N-BK7 Discs

Diameter

  • 50mm

Thickness

  • 3mm

Quantity

Unit Price (1-10) excl. VAT

£23.00

* You have selected 10+ stock parts. Please add to quote for discount pricing over 10+ and volume/OEM quantities.

Download Datasheet PDF

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