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