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.
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)
/2 @ 632.8nm
/10 @ 632.8nm
/10 @ 632.8nm
/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
11
WB12-005
5.0
2.0
28
WB11-010
10.0
2.0
16
WB12-010
10.0
2.0
35
WB11-012
12.5
2.0
17
WB12-012
12.5
6.0
36
WB11-020
20.0
2.0
19
WB12-020
20.0
6.0
47
WB11-025
25.0
2.0
23
WB12-025
25.0
6.0
56
WB11-038
38.0
4.0
26
WB12-038
38.0
10.0
76
WB11-050
50.0
4.0
35
WB12-050
50.0
10.0
137
UV Grade Fused Silica, High WB22
Model No
Dia mm
Thick
Price
WF22-005
5.0
2.0
35
WF22-010
10.0
2.0
41
WF22-012
12.5
6.0
47
WF22-020
20.0
6.0
58
WF22-025
25.0
6.0
71
WF22-038
38.0
10.0
118
WF22-050
50.0
10.0
286
Tower Optical is a precision optics manufacturer offering short lead times, excellent products, and competitive prices. Tower Optical Corporation
3600 S. Congress Unit J, Boynton Beach, FL 33426 Email: sales@toweroptical.com Phone: 1-561-740-2525 • Toll Free: 1-800-526-7560 • Fax: 1-561-740-2518
/2 @ 632.8nm
