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01622 859444
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Precision glass windows-BK7 type (λ/4)

These Precision Glass Windows are optically-polished with parallel faces and are useful not only as windows but as substrates for special beamsplitters etc. These Precision Glass Windows are offered uncoated, AR-coated for ranges covering both visible and NIR (450-900nm). As these windows have parallel faces they are ideal for applications that require minimal transmitted beam deviation.
 

Knight Optical > Windows
BK7 Window - Quality Grade (Lambda/4)BK7 Window - Quality Grade (Lambda/4)
This is the section containing BK7 Window - Quality Grade (Lambda/4).
Borosilicate Window - Polished Grade ( Lambda/1)Borosilicate Window - Polished Grade ( Lambda/1)
This is the section containing Borosilicate Window - Polished Grade ( Lambda/1).
Borosilicate - Float grade Borosilicate - Float grade
This is the section containing Borosilicate - Float grade .
Quartz Window  (Lambda/2)Quartz Window (Lambda/2)
This is the section containing Quartz Window (Lambda/2).
Sapphire Window (2.5 Lambda)Sapphire Window (2.5 Lambda)
This is the section containing Sapphire Window (2.5 Lambda).
Silicon Window (2.5 Lambda)Silicon Window (2.5 Lambda)
This is the section containing Silicon Window (2.5 Lambda).
UV Fused Silica Window (Lambda/2)UV Fused Silica Window (Lambda/2)
This is the section containing UV Fused Silica Window (Lambda/2).
White Float Windows - UncoatedWhite Float Windows - Uncoated
This is the section containing White Float Windows - Uncoated.
White Float Windows - AR coated one sideWhite Float Windows - AR coated one side
This is the section containing White Float Windows - AR coated one side.
White Float Windows - AR coated both sidesWhite Float Windows - AR coated both sides
This is the section containing White Float Windows - AR coated both sides.
White Float Windows - ITO coated one sideWhite Float Windows - ITO coated one side
This is the section containing White Float Windows - ITO coated one side.

Only UK and EU customers are charged VAT at 17.5%, customers outside the EU and EU customers based outside the UK who have a valid EU VAT number will not be charged VAT

Bulk Discounts!
Where (B) appears next to a price below, bulk prices are available, click the (B) button to view!


Knight Optical > Windows
Specification  
Material: BK7
Material Data: (see materials section)
Diameter: +0, -0.15mm
Length, width: ±0.1mm
Thickness: ±0.1mm
Flatness: λ/4 over 90% of aperture dimensions
Scratch-dig <40-20
Parallelism <30 arcsec
 

Specific requirements
We can manufacture Precision BK7 glass windows to any size at short notice, so if your requirements are not listed please contact us by telephone / fax or email: stockrequirement@knightoptical.co.uk

Options available
  · Mounting (circles up to 50mm dia.)
  · Other coatings
  · Edging to smaller diameters

See also
Optical flats


   
 
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      Knight Optical (UK) Ltd
      Templetree House, Sandway Road, Harrietsham, Kent ME17 1HT. United Kingdom.
      Phone: +44 (0)1622 859444   Fax: +44 (0)1622 859555
      e-mail: info@knightoptical.co.uk   Web design by Smart ePos