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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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SpecificationStandard GradeHigh GradeLaser GradeHigh Grade
MaterialBK7 grade ABK7 grade AUV Fused SilicaSapphire
Dimensional Tolerance+0.0/-0.1mm+0.0/-0.1mm+0.0/-0.1mm±0.1mm
Flatness
(TWF)		λ/2 @ 632.8nmλ/10 @ 632.8nmλ/10 @ 632.8nmλ/4 per 25.4mm
Surface Quality
Scratch/Dig		40/2020/1020/1040/20
Thickness Tolerance±0.2mm±0.2mm±0.2mm±0.1mm
Parallelism< 1 arc minute< 10 arc seconds< 10 arc seconds< 30 arc seconds
Bevel0.2mm x 45°0.2mm x 45°0.2mm x 45°–

 

BK7 Grade A Optical Glass, Stadard WB11 and High WB12
Model NoDia mmThickPriceModel NoDia mmThickPrice
WB11-0055.02.012WB12-0055.02.031
WB11-01010.02.018WB12-01010.02.039
WB11-01212.52.019WB12-01212.56.040
WB11-02020.02.021WB12-02020.06.052
WB11-02525.02.025WB12-02525.06.062
WB11-03838.04.029WB12-03838.010.084
WB11-05050.04.039WB12-05050.010.0151

 

UV Grade Fused Silica, High WB22
Model NoDia mmThickPrice
WF22-0055.02.039
WF22-01010.02.045
WF22-01212.56.052
WF22-02020.06.064
WF22-02525.06.078
WF22-03838.010.0130
WF22-05050.010.0315

 

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