The traditional manual method is adopted to process
the lager diameter paraboloid 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. We are Coaxial Lenses Combination Factory.
Material BK7, ZK N4 , Zerodur ect.
Diameter tolerance +0.0/-0.15mm
Aspherical surface Paraboloid, Hyperboloid
Focal length tolerance ±2%
Clear aperture ≥90%
RMS Irregularity 1/40λ
Surface Quality 60-40
Bevel 0.25 mm × 45°
Coating Metal reflection coating/Dielectric reflection coating