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Knight Optical(UK) Ltd - sales@knightoptical.co.uk - +44 (0)1622 859444

Standard grade whitefloat windows

What are you looking for in Stock?

White float windows are cost effective medium performance windows and acceptable in a host of scientific instrument applications.
They are cut from large sheets that are relatively flat and parallel and can be supplied in standard thickness down to 1.1mm.  Thinner windows can be supplied to special order.  As no polishing is required white float windows are extremely economical. White float windows transmit efficiently from 320nm to 2600nm and are a good alternative to BK7 or equivalent . They are an economical choice of window as the substrate material is available in standard sheet polished material in a range of thicknesses so no polishing is required, unlike BK7 or equivalent  that is originates as block material and requires further processing of sawing and polishing adding to cost. When using white float windows without antireflective coating there is a small residual reflection. If this is significant then the AR coated versions should be used. 

We offer four versions of white float windows, uncoated, AR coated one face, AR coated both faces and ITO coated.

Uncoated white float windows: This range of economical white float windows are available as diameters, squares and rectangles. Large stock sheets can be cut down for your custom uncoated white float windows. White float windows are ideal for a range of display, lighting and scientific instrument applications.


White float windows antireflective coated on one face: Our 1mm thk white float windows antireflective coated one face with extended broadband AR coating (AV2 specification) achieving better than 0.5%R,avg.@450-900nm. Our 3mm thk range are cut from large 1000x1000mm sheets that are extremely economical achieving better than <1%R,avg.@425-680nm in the visible (AV8 specification) AR coated single-sided white float windows are available as diameters edged to accurate tolerances Squares and rectangles have cut and chamfered edges to ±0.25mm tolerances. We also stock large sheets of white float material AR coated on one side as 1000x1000mm in thicknesses of 2mm to 8mm thk for custom AR coated white float windows. The extended broadband 1mm thk type is available as 145x100mm sheets.

White float windows antireflective coated on both faces: Our 1mm thk white float windows antireflective coated on both faces is coated with extended broadband AR coating (AV2 specification) achieving better than 0.5%R,avg.@450-900nm. Our 3mm thk range are cut from large 1000x1000mm sheets that are extremely economical AR coated large sheets working efficiently in the visible (AV8 specification) achieving <1%R,avg.@425-680nm. Diameters are edged to accurate tolerances, squares and rectangles have cut and chamfered edges to ±0.25mm tolerances. We also stock large sheets of white float material AR coated on both sides as 1000x1000mm in thicknesses of 2mm to 8mm thk for custom The extended broadband 1mm thk type AR coated on both faces are available as 145x100mm sheets.

White float windows telecoms coated on one face: AR coated white float windows coated for the telecoms region between 1050-1700nm. Our coating achieves less than 0.5% reflection in the telecoms band and 0.09% reflection at 1550nm. These windows are optimized for fibre optic applications in the S and C bands between 1460nm to 1565nm while maintaining excellent transmision out of the operating wavelength.

White float windows ITO coated on one face: ITO coating is an electrically conducting coating used for a host of defence and aerospace applications. We stock ITO coated white float windows as diameter, square and rectangular apertures. Indium Tin Oxide (ITO) coated windows are used for displays, electric heating and EMI shielding applications. These ITO coated windows “Indium Tin Oxide” are vacuum coated to 20ohm.  We stock larger sheets of ITO coated glass as 300mm squares so if your size is not listed please enquire about your custom ITO coated application. We can offer custom ITO windows to your requirements with different levels of resistance. We can also coat ITO onto plastic or polymers, please speak to our sales team.

Our complete range of white float windows can be machined to special shapes and surfaces can be ground to create a diffused finish. Surfaces can also be etched with screen printing designs. For high quality windows please see Quality BK7 or equivalent  windows


Material: White float glass
Diameter: +0/-0.2mm
Length, width:  ±0.3mm
Thickness: ±0.20mm
Flatness: < 2 waves over 50mm
Surface Quality: <60-40 scratch/dig
Parallelism: <1 arcmin

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

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.

Coatings:
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 one face 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

Stock Optics

Get a Custom Quote

Part No. CoatingCoated sidesDiameter
(mm)
Length
(mm)
Width
(mm)
Thick
(mm)
Price
(Ex.VAT)
Buy
WGW1000 Uncoated101.1 £6.95
WGW10000 Uncoated1006 £24.80
WGW10009-AV8 SLAR@425-680nmBoth sides1004 £24.90
WGW1000-AV2 Ext.Vis@450-900nmOne side101.1 £8.75
WGW100100 Uncoated1001003 £12.85
WGW100100-AV8 SLAR@425-680nmOne side1001003 £21.70
WGW100101 Uncoated1001001.1 £12.70
WGW100109-AV8 SLAR@425-680nmBoth sides1001003 £23.25
WGW1011-AV2 Ext.Vis@450-900nmBoth sides101.1 £8.75
WGW1500-AV2 Ext.Vis@450-900nmOne side151.1 £8.45
WGW1511-AV2 Ext.Vis@450-900nmBoth sides151.1 £10.90
WGW1600 Uncoated161.1 £6.95
WGW2500 Uncoated253 £8.75
WGW2500-AV8 SLAR@425-680nmOne side253 £8.90
WGW2511 Uncoated251 £7.70
WGW2511-AV2 Ext.Vis@450-900nmOne side251.1 £12.75
WGW2515 Uncoated25151.1 £5.90
WGW2515-AV2 Ext.Vis@450-900nmOne side25151.1 £9.90
WGW2516-AV2 Ext.Vis@450-900nmBoth sides25151.1 £10.45
WGW2522-AV2 Ext.Vis@450-900nmBoth sides251.1 £15.85
WGW2525 Uncoated25251.1 £6.50
WGW2525-AV2 Ext.Vis@450-900nmOne side25251.1 £11.85
WGW2526-AV2 Ext.Vis@450-900nmBoth sides25251.1 £12.65
WGW2599-AV8 SLAR@425-680nmBoth sides253 £9.50
WGW4000 Uncoated406 £12.55
WGW4000-AV8 SLAR@425-680nmOne side403 £11.50
WGW4011 Uncoated401.1 £7.90
WGW4025 Uncoated40253 £6.45
WGW4029-AV8 SLAR@425-680nmBoth sides40253 £8.90
WGW4099-AV8 SLAR@425-680nmBoth sides403 £11.85
WGW5000 Uncoated503 £10.70
WGW5000-AV8 SLAR@425-680nmOne side503 £13.25
WGW5050 Uncoated50501.1 £7.45
WGW5050-AV2 Ext.Vis@450-900nmOne side50501.1 £23.30
WGW5051 Uncoated50503 £7.95
WGW5051-AV2 Ext.Vis@450-900nmBoth sides50501.1 £29.90
WGW5059-AV8 SLAR@425-680nmBoth sides50503 £9.95
WGW5099-AV8 SLAR@425-680nmBoth sides503 £13.75
WGW6500 Uncoated653 £11.60
WGW6500-AV8 SLAR@425-680nmOne side653 £15.75
WGW6599-AV8 SLAR@425-680nmBoth sides653 £16.25
WGW7500 Uncoated753 £12.90
WIW2000-I02 ITO (20 ohm/SQ inch)One side201.1 £9.90
WIW2500-I02 ITO (20 ohm/SQ inch)One side251.1 £11.35
WIW4000-I02 ITO (20 ohm/SQ inch)One side401.1 £13.50
WIW5000-I02 ITO (20 ohm/SQ inch)One side501.1 £14.75
WIW5050-I02 ITO (20 ohm/SQ inch)One side50501.1 £12.45
WGW3011 Uncoated30301.1 £6.70
WGT1000-AI2 AR@1050-1700nmBoth sides101 £12.75
WGT1003-AI2 AR@1050-1700nmBoth sides103 £16.75
WGT1004-AI2 AR@1050-1700nmBoth sides104 £20.00
WGT2500-AI2 AR@1050-1700nmBoth sides251 £16.15
WGT2503-AI2 AR@1050-1700nmBoth sides253 £19.85
WGT2504-AI2 AR@1050-1700nmBoth sides254 £22.50
WGT2523-AI2 AR@1050-1700nmBoth sides25253 £18.00
WGT2524-AI2 AR@1050-1700nmBoth sides25254 £19.85
WGT2525-AI2 AR@1050-1700nmBoth sides25251 £15.85
WGT5000-AI2 AR@1050-1700nmBoth sides501 £37.95
WGT5003-AI2 AR@1050-1700nmBoth sides503 £41.95
WGT5004-AI2 AR@1050-1700nmBoth sides504 £43.75
WGT5050-AI2 AR@1050-1700nmBoth sides50501 £35.55
WGT5053-AI2 AR@1050-1700nmBoth sides50503 £39.25
WGT5054-AI2 AR@1050-1700nmBoth sides50504 £39.25

Get a Custom Quote

Get in touch

Our Multi-Lingual Sales Team are here to help with your requirments:

UK +44 (0)1622 859444
UK +44 (0)1622 850614
UK +44 (0)1622 851078
+1 401 583 7846

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