White float glass windows are a cost-effective, medium-performance option suitable for various scientific, display, and lighting applications. Cut from large, flat, and parallel sheets, they are available in standard thicknesses down to 1mm, with thinner options available by special order. As no polishing is required—unlike N-BK7 or similar materials—white float offers significant cost advantages.
These windows efficiently transmit light from 320nm to 2600nm. Without an antireflective (AR) coating, a small residual reflection may be present; AR-coated versions are recommended where minimal reflection is required.
Knight Optical offers coated and uncoated white float glass windows:
- AV8 – Single Layer AR < 1% R(avg) @ 425-680nm – one or both sides coated.
- ITO coated – vacuum-coated to 20ohm.
An ITO (Indium Tin Oxide) coating is an electrically conductive coating for aerospace, defence, EMI shielding, display, and heating applications.
Custom sizes can be cut from large stock sheets. For premium optical performance, see our range of polished N-BK7 or equivalent windows.
Coating:
Windows with suffix "AV8" are coated on one or both faces with:
Single layer MgF2 AR, R.avg<1.5%@425-680nm
Windows with suffix "IO2" are coated on one face with:
20 ohm/SQ inch, T.avg>68%@400-700nm
Typical processes that we can offer for whitefloat glass substrates are as follows:
Large 1000x1000mm single layer AR sheets available for custom sizes.
Stock sheets can be edged to custom diameters.
CNC shaping of glass to unusual shapes and designs.
Stock sheets can be cut to custom square and rectangular apertures.
Water jet cutting to special shapes and sizes.
Drilling holes for mounting onto walls etc.
Rebating of edges of diameters, squares and rectangles.
Laminating for polarisers etc.
Special AR coating, beamsplitter coatings and mirror coatings.
Sandblasting of special patterns.
Screen printing.
Toughening of all shapes and sizes.
Glass bending and shaping to unusual shapes.
Edge polishing.
Mounting options.
Coating:
Windows with suffix "AV2" are coated on one or both faces with:
Extended broadband multilayer antireflective coating <0.5%@450-900nm
Windows with suffix "AV8" are coated on one or both faces with:
Single layer MgF2 AR, R.avg<1.5%@425-680nm
Windows with suffix "AI2" are coated on both faces with:
Telecom grade AR coating 1050-1700nm Ravg<0.5%
Windows with suffix "IO2" are coated on one face with:
20 ohm/SQ inch, T.avg>68%@400-700nm
| Name | Material | Coating | Coated Sides | Diameter (mm) | Length (mm) | Width (mm) | Thickness (mm) | Price | Buy |
| WIW2000-I02 | White Float Glass | ITO (20 ohm/SQ inch) | One | 20 | 1 |
US$21.96
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| WGW6599-AV8 | White Float Glass | SLAR @ 425-680nm | Both | 65 | 3 |
US$40.31
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| WGW6500-AV8 | White Float Glass | SLAR @ 425-680nm | One | 65 | 3 |
US$39.34
|
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| WGW5099-AV8 | White Float Glass | SLAR @ 425-680nm | Both | 50 | 3 |
US$36.84
|
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| WGW5059-AV8 | White Float Glass | SLAR @ 425-680nm | Both | 50 | 50 | 3 |
US$27.11
|
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| WGW5000-AV8 | White Float Glass | SLAR @ 425-680nm | One | 50 | 3 |
US$35.86
|
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| WGW4099-AV8 | White Float Glass | SLAR @ 425-680nm | Both | 40 | 3 |
US$33.22
|
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| WGW4029-AV8 | White Float Glass | SLAR @ 425-680nm | Both | 40 | 25 | 3 |
US$22.80
|
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| WGW4000-AV8 | White Float Glass | SLAR @ 425-680nm | One | 40 | 3 |
US$32.25
|
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| WGW2599-AV8 | White Float Glass | SLAR @ 425-680nm | Both | 25 | 3 |
US$30.58
|
