Optical Windows

From UV to VIS to IR wavelength, we have fused silica (WFS series) and BK7 (WBK series) optical windows, which are known for their low coefficient of thermal expansion, it has a high transmittance for light from ultraviolet to the near-infrared range, low scattering, and excellent cost-effectiveness. Coated fused silica windows are widely used in fiber laser cutting and welding systems.

Diameter Tolerance: +0/-0.25mm
Thickness Tolerance: ±0.25mm
Parallelism: ≤ 10arcsec or 30 ± 5arcmin
Clear Aperture: ≥ 85% of central diameter
Surface Quality: 10–5 Scratch & Dig
AR Coating: R≤0.25% per surface @ 1064nm (Single Wavelength) | R≤0.3% @ 1064nm (Dual Wavelength)
Damage Threshold: 10J/cm², 10ns, 20Hz @ 1064nm (Single Wavelength) | 3.5J/cm², 10ns, 20Hz @ 532nm (Dual Wavelength) | 7J/cm², 10ns, 20Hz @ 1064nm (Dual Wavelength)

IR optical windows isolate different physical environments while allowing light to pass through. These windows are made of Ge material (WGE series).

Diameter Tolerance: +0.0, -0.2 mm
Thickness Tolerance: ±0.2mm
Clear Aperture: >80%
Parallelism: <3 arc min
Surface Quality: 40-20 scratch and dig
Flatness: λ /2 @632.8nm per 25mmDia

We provide medical laser windows (WBK series) for varieties of medical laser systems such as CO2, Q-switched Nd:YAG, ER:YAG, Ruby, and Alex Laser systems. These optics have been used as replacements in well-known medical systems such as Con-Bio, ESC, Sharplan, Candela, and Coherent.

Diameter Tolerance: +0/-0.13mm
Thickness Tolerance: ±0.25mm
Parallelism: < 3 arc min.
Clear Aperture: >90% 
Surface Flatness: λ/4 per 1″Dia@632.8nm
Surface Quality: 40-20 S-D

ZnSe optical (WZ Series) and ZnSe brewster windows (WZB Series) are commonly used in thermal resistance applications. These optical windows are available with us in coated or uncoated form and in a wide variety of shapes and sizes. It has wide usage in high-power CO2 laser systems.

Dimension Tolerance: +0/-0.13mm
Thickness Tolerance: ±0.25mm
Parallelism: ≤3 arc min.
Clear Aperture: >90%
Surface Flatness: λ/4 per 1″Dia@632.8nm
Surface Quality: 60-40 S-DAR
Coating: R<0.2% per surface @10.6μm
Angle of Incidence: Brewster Angle @ 10.6μm

Thin film polarizers (TFP series) are used to split a laser beam into two parts with S and P Polarizations. Meanwhile, they can also be used to combine two beams with S and P polarizations. They consist of a coated plate, which is oriented at Brewster’s angle with respect to the incoming beam. The thin-film coating is able to enhance the reflectivity of the s-polarized component of the beam and maintain high transmission of the p-polarized component.

Material: ZnSe
Surface Flatness: λ/4 per 1″Dia@632.8nm
Surface Quality: 40-20 S-D
Coating: Tp =97%+/-0.5%@10.6um | Rs =97%+/-0.5%@10.6μm
Angle of Incidence: 67.3˚ (brewster angle@10.6μm)