The traditional manual method is adopted to process the lager diameter parabolic and hyperboloid lens with BK7 (ZK N4 or Zerodur) material, use knife-edge instrument for test, with high processing accuracy, and the diameter can be within 900mm.surface accuracy could be less than 1/40 lambda. Through high precision parallel light tube, combined processing method to ensure the image quality of primary and secondary mirror combined system. With knife-edge instrument, the spot size can be controlled within 0.02mm.It can also process non-focal beam expansion system, that is, Parallel light comes in and parallel light comes out.Expansion can be designed according to customer requirements.
|Material||BK7, ZK N4 ,Zerodur ect.|
|Diameter of primary and secondary mirror||≤900mm|
|Structure of Primary and secondary mirror||Paraboloid+ Paraboloid / Paraboloid +Hyperboloid|
|Type||Primary and secondary mirror imaging/Afocal system|
|Focal length tolerance||±2%|
|Bevel||0.25 mm × 45°|
|Coating||Metal reflection coating/Dielectric reflection coating|