Optical Window

Description

From UV to VIS to IR wavelength, we have Fused Silica (WFS)/BK7 (WBK) optical windows, which are known for its 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.

Specification
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)

Application
Laser Cutting

Description

We provide windows 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 most well-known medical systems such as Con-Bio, ESC, Sharplan, Candela, and Coherent.

Specification
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 Window

Description

ZnSe (WZ Series) and ZnSe Brewster Windows (WZB Series) are commonly used in thermal resistance applications.  ZnSe 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.

Specification
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 @ 10.6um

Application
Laser Cutting

ZnSe Thin Film Polarizer

Description

Thin Film Polarizer (TFP) is used to split a laser beam into two parts with S and P Polarizations. Meanwhile, TFP can also be used to combine two beams with S and P polarizations. A TFP consists 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.

Specification
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%@10.6um
Angle of Incidence: 67.3˚ (brewster angle@10.6um)