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Coaxial Big Aperture Parabolic lenses combination

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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.

Coaxial Aspherical(Paraboloid  Paraboloid / Paraboloid  Hyperboloid) Mirrors

MaterialBK7, ZK N4 ,Zerodur ect.
Diameter tolerance+0.0/-0.15mm
Diameter of primary and secondary mirror≤900mm
Structure of Primary and secondary mirrorParaboloid+ Paraboloid / Paraboloid +Hyperboloid
TypePrimary and secondary mirror imaging/Afocal system
Focal length tolerance±2%
Clear aperture≥90%
Light spot0.02mm
Surface Quality60-40
Bevel0.25 mm × 45°
CoatingMetal reflection coating/Dielectric reflection coating