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Borosilicate windows
Low-expansion
Borosilicate (LEGB) Windows are very suitable for windows,
because borosilicate glass has excellent chemical and
thermal-shock resistance.
We
offer both 1.1mm windows made by the float process for
general purpose applications and two grades of polished
window, either λ/4 or λ/2 for more precision applications.
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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! |
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Specification |
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| Material: |
LEGB |
| Material
Data: |
(see
materials section) |
| Diameter: |
+0,
-0.2mm |
| Thickness |
±0.2mm
(float)
±0.1mm (polished) |
| Flatness: |
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Float type (typical) |
1λ
over 10mm dia |
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Polished grade |
λ/2
or λ/4 over
90% of aperture dimensions |
| Scratch-dig |
<60-40 |
| Parallelism |
<1
(polished type) |
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Specific requirements
We can manufacture
Borosilicate 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.)
· AR and other coatings
· Edging to smaller diameters
See also
UV-fused
silica windows (λ/2)
Quartz windows
(λ/2)
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