常用作聚焦鏡的紅外平凸鏡,材料包括BaF2,CaF2,Si,Ge,Al2O3,ZnSe以及其他各種材料。此材料為Ge.
產(chǎn)品指標(biāo)如下:
Diameter tolerance 0,-0.005" (+0,-0.13 mm)
Center Thickness tolerance +/-0.008" (+/-0.2 mm)
Design Wavelength 10.6 microns
Focal Length Tolerance +/-0.02
Surface Quality 60/40
Clear Aperture 90% Central Diameter
Wedge Angle <3 arc min
Surface Irregularity 1/20 l at 10.6 microns
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