Detailed Product Description

optical lenses

Biconvex Lenses have positive focal lengths

     ·  converge incident light

• form both real and virtual images
• minimize spherical aberration as well as cancel coma and distortion at unit conjugate ratio.
• Biconvex lenses are all symmetrical, having equal radii on both sides. They are recommended for virtual imaging of real objects, and for positive conjugate ratios from 0.2 up to 5. Outside of this ratios range plano-convex lenses are usually more suitable. Biconvex lenses are used as magnifiers, objectives, some condensing systems.
  Since both surfaces contribute to the power of biconvex lenses, they have shorter focal lengths than plano-convex lenses of equal diameter and surface radius .
• SPECIFICATIONS:
  

  Material	BK7
  Surface quality	40-20 scratch & dig
  Clear aperture	90% of the diameter
  Diameter tolerance	+0.00, -0.05mm
  Thickness tolerance	±0.05 mm
  Surface irregularity	λ/8 @ 633 nm
  Concentricity	3 arcmin
  Paraxial focal length	±2% @ 546 nm