Plane Windows

Windows are applied to isolate different physical environments while allowing light to pass through. BTMT has the ability to meet your requirements of different sizes, accuracy, materials, shapes and coating from ultra-violet to infra-red range you need.

Specifications

Material
Crown, Flint, UVFS
Dimension Tolerance
+0.00/-0.10mm
Surface Flatness
λ/10@633nm
Surface quality
10-5 ~ 20/10
Thickness Tolerance
± 0.2mm
Clear Aperture
>90% of central diameter
Bevel
0.3mmx45°
Coating
Optional

Material	Properties	Application
BK7	Transmission Range:330-2100nm	Good performance over visible and near IR spectrum for many applications
Fused Silica	Transmission Range: 185-2500nm	Better performance from UV to IR spectrum. Also, it is the best choice for resistance thermal application.
Fused Silica	Low Thermal Expansion Coefficient: 0.54 x K
Calcium Fluoride	Transmission Range: 140-9400nm	It is applicable for wide rang spectrum, and it is particularly useful for excimer laser application.
Calcium Fluoride	Refractive Index:1.400@ 5000nm

Plane Windows

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