These lenses（双面凸微透镜） are useful in fiber coupling, micro laser systems and medical applications.

产品指标如下：
Material Zinc Selenide CVD Grade (ZnSe)
Diameter tolerance +0,-0.002” (+0,-0.05 mm)
Center Thickness tolerance ±0.004” (±0.1 mm)
Design Wavelength 10.6 microns
Focal Length Tolerance ±3%
Surface Quality 60/40
Clear Aperture 90% Central Diameter
Wedge Angle < 6 arc min