These lenses（微透镜） are useful in fiber coupling, micro laser systems and medical applications。
产品指标如下：
Material Fused Silica UV Grade
Diameter tolerance +0,-0.002” (+0,-0.05 mm)
Center Thickness tolerance ±0.004” (±0.1 mm)
Design Wavelength 546 nm
Focal Length Tolerance ±3%
Surface Quality 60/40
Clear Aperture 90% Central Diameter
Wedge Angle < 6 arc min
