Circular, Square and Rectangular

Custom circular and square windows

Windows are used to isolate different physical environments while allowing light to pass. The selection of a window should consider the properties of the different optical materials, transmission, wavelength range, and resistance to the environment. Tower offers a wide range of different materials and a variety of anti-reflecting coatings that can be deposited on the windows.

Tower Optical manufactures windows from BK7, UV Grade Fused Silica and Sapphire. Other materials are available on a custom basis. In addition, we offer three different quality standards as described below. Contact factory for info on Sapphire Windows.

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Specification Standard Grade High Grade Laser Grade High Grade
Material BK7 grade A BK7 grade A UV Fused Silica Sapphire
Dimensional Tolerance +0.0/-0.1mm +0.0/-0.1mm +0.0/-0.1mm ±0.1mm
Flatness
(TWF)
λ/2 @ 632.8nm λ/10 @ 632.8nm λ/10 @ 632.8nm λ/4 per 25.4mm
Surface Quality
Scratch/Dig
40/20 20/10 20/10 40/20
Thickness Tolerance ±0.2mm ±0.2mm ±0.2mm ±0.1mm
Parallelism < 1 arc minute < 10 arc seconds < 10 arc seconds < 30 arc seconds
Bevel 0.2mm x 45° 0.2mm x 45° 0.2mm x 45°

 

BK7 Grade A Optical Glass, Stadard WB11 and High WB12
Model No Dia mm Thick Price Model No Dia mm Thick Price
WB11-005 5.0 2.0 12 WB12-005 5.0 2.0 31
WB11-010 10.0 2.0 18 WB12-010 10.0 2.0 39
WB11-012 12.5 2.0 19 WB12-012 12.5 6.0 40
WB11-020 20.0 2.0 21 WB12-020 20.0 6.0 52
WB11-025 25.0 2.0 25 WB12-025 25.0 6.0 62
WB11-038 38.0 4.0 29 WB12-038 38.0 10.0 84
WB11-050 50.0 4.0 39 WB12-050 50.0 10.0 151

 

UV Grade Fused Silica, High WB22
Model No Dia mm Thick Price
WF22-005 5.0 2.0 39
WF22-010 10.0 2.0 45
WF22-012 12.5 6.0 52
WF22-020 20.0 6.0 64
WF22-025 25.0 6.0 78
WF22-038 38.0 10.0 130
WF22-050 50.0 10.0 315

 

We make custom versions of everything on this site. Send us your drawings or specifications and we will provide a quotation.