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Off-axis Big Aperture Parabolic lenses combination

Product Details

The traditional manual method is adopted to process the lager diameter parabolic and hyperbolic 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.

Through the way of sleeve, the high precision off-axis mirror combination could be obtained.

Off-axis 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 mirrorParabolic+ Parabolic /Parabolic +Hyperbolic
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