[ Home ] [ View Basket ] [ Go To Checkout ] [ Help ] [ Contact Us ] [ Site Map ]
Knight Optical U.K. Ltd. = Optical Component Specialists
Search the Site
> Kotek > History > Components > Press > Opportunities > Locate > Have Your Say
Online Store
  > Lenses
  > Filters
  > Diffusers
  > Windows
  > Optical Flats
  > Mirrors
  > Beamsplitters
  > Prisms
  > Polarisers
  > Retarders
  > Gratings/ Graticules and Apertures
Other Services
  > Latest News
  > Useful Links
  > Mailing List
  > Add to Favourites
  > Email a friend
  > Terms & Conditions

01622 859444
Secured by Secpay
We accept these credit cards

Optical Flats

These high quality flat substrates are made from tree types of material, Zerodur, fused silica and LEGB. These Optical Flats can be used for interferometry i.e. checking the flatness of other surfaces from interference fringes (Newton's rings) which are seen when the surfaces are in contact, in monochromatic light. They can be used for high quality laser mirrors.
 

Knight Optical > Optical Flats > Fused Silica type
Flat 1 side-Lambda/10Flat 1 side-Lambda/10
This is the section containing Flat 1 side-Lambda/10.
Flat 1 side-Lambda/4Flat 1 side-Lambda/4
This is the section containing Flat 1 side-Lambda/4.

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 > Optical Flats > Fused Silica type
Specification  
Material: Zerodur, Fused silica, LEGB
Material Data : (see materials section)
Dimensional: +0.0/-0.2 mm
Thickness: +0.0/-0.2 mm
Scratch/dig 10:5
Surface finish: <5 angstrom off pitch
Flatness face 1: λ/10 & over 95%
Flatness face 2: Commercial polish
Parallelism: <1 arcmin (or better if required)
 
 

Specific requirements
We can manufacture Optical Flats 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
. Special Mirror and other coatings
. Other sizes i.e. squares, rectangles, and other diameters at short notice
. Other grades of flatness i.e. <l/20
. Flat polishing of second face

Technical Data Sheets
Are available for each filter (see materials section)

See also
Precision glass windows-BK7 type (λ/4)
Borosilicate windows


   
 
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
      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