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We are offering germanium lens. (germanium lens) material: germanium dimension tolerance: +0/-0.10 mm clear aperture: 95% of diameter thickness tolerance:±0.25mm focal length:±2% surface quality: 60/40 power / irregularity: 5.0/2.0 fringes centration: 3 arc minutes coating: ar/ar lambda/4 @ 8 – 14 um, t >
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