China N-Bk7 or Fused Silica Achromatic Doublet Lens, Find details about China Focusing, Laser from N-Bk7 or Fused Silica Achromatic Doublet Lens
Material: | Optical crown and flint glasses or equivalent |
Surface Quality: | 10/5-40/20 |
Surface Accuracy: | PV<λ/6@633nm |
Focal Length Tolerance: | ±2% |
Centration: | <1 arc min |
Clear Aperture: | >central 90% of diameter |