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Plane Windows

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  • 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.

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.

Refractive Index:1.400@ 5000nm