plano cancave lens

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plano cancave lens
Material: flint glasses, UV-fused silica, Infrared fused silica, CaF2, Ge, ZnSe, Si, etc.
Focal length: ±5mm --±1000mm±1%
(test by TIROPTICS OPTOMATIC2000 made in Germany)
Diameter: 4mm--200mm ±0.1mm
Tc torlerance:±0.1mm
Centration: 3-5'
Surface accuracy: λ/2
Surface quality: 40/20
Clear aperture: 90%
Coating: custom design