BK7 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. Lenses may be anti-reflection coated.

For required coating please refer to the COATINGS section. We can supply custom cutting, edging, coating or complete fabrication if required.

Delivery

Estimated delivery time: from 4 - 5 days

Focal Length
Centre Thickness
Edge Thickness
Diameter

Size: dia 12,7 mm

Code Focal Length Centre Thickness Edge Thickness Diameter Price Delivery Add to cart
111-0104E F 12,7 mm CT - 4,8 mm ET - 1,2 mm 12,7 mm 18 $ 4 - 5 days To cart
111-0104M F 12,7 mm CT - 4,8 mm ET - 1,2 mm 12,5 mm 18 $ 4 - 5 days To cart
111-0108E F 25 mm CT - 3,5 mm ET - 1,9 mm 12,7 mm 18 $ 4 - 5 days To cart
111-0108M F 25 mm CT - 3,5 mm ET - 1,9 mm 12,5 mm 18 $ 4 - 5 days To cart
111-0114E F 40 mm CT - 2,5 mm ET - 2 mm 12,7 mm 18 $ 4 - 5 days To cart
111-0116E F 50 mm CT - 2,5 mm ET - 2 mm 12,7 mm 18 $ 4 - 5 days To cart
111-0118E F 60 mm CT - 2,5 mm ET - 2 mm 12,7 mm 18 $ 4 - 5 days To cart
111-0118M F 60 mm CT - 2,5 mm ET - 2 mm 12,5 mm 18 $ 4 - 5 days To cart
111-0120E F 75 mm CT - 2,5 mm ET - 2 mm 12,7 mm 17 $ 4 - 5 days To cart
111-0124E F 100 mm CT - 2 mm ET - 1,6 mm 12,7 mm 17 $ 4 - 5 days To cart
111-0128E F 125 mm CT - 2 mm ET - 1,7 mm 12,7 mm 17 $ 4 - 5 days To cart
111-0132E F 150 mm CT - 2 mm ET - 1,7 mm 12,7 mm 17 $ Request To cart
111-0132M F 150 mm CT - 2 mm ET - 1,7 mm 12,5 mm 17 $ 4 - 5 days To cart
111-0136E F 200 mm CT - 2 mm ET - 1,9 mm 12,7 mm 17 $ 4 - 5 days To cart
111-0136M F 200 mm CT - 2 mm ET - 1,9 mm 12,5 mm 17 $ 4 - 5 days To cart
111-0140E F 250 mm CT - 2 mm ET - 1,9 mm 12,7 mm 17 $ 4 - 5 days To cart
111-0144E F 300 mm CT - 2 mm ET - 1,9 mm 12,7 mm 17 $ 4 - 5 days To cart
111-0148E F 400 mm CT - 2 mm ET - 1,9 mm 12,7 mm 17 $ 4 - 5 days To cart
111-0152E F 500 mm CT - 3 mm ET - 3 mm 12,7 mm 17 $ 4 - 5 days To cart

Size: dia 25,4 mm

Code Focal Length Centre Thickness Edge Thickness Diameter Price Delivery Add to cart
111-0204E F 25 mm CT - 9 mm ET - 2,1 mm 25,4 mm 23 $ 4 - 5 days To cart
111-0206E F 30 mm CT - 7,5 mm ET - 2,4 mm 25,4 mm 23 $ 4 - 5 days To cart
111-0208E F 40 mm CT - 6 mm ET - 3 mm 25,4 mm 23 $ 4 - 5 days To cart
111-0208M F 40 mm CT - 6 mm ET - 3 mm 25,0 mm 23 $ 4 - 5 days To cart
111-0210E F 50 mm CT - 6 mm ET - 3 mm 25,4 mm 21 $ 4 - 5 days To cart
111-0214E F 60 mm CT - 4 mm ET - 1,6 mm 25,4 mm 21 $ 4 - 5 days To cart
111-0216E F 75 mm CT - 4 mm ET - 2 mm 25,4 mm 21 $ 4 - 5 days To cart
111-0218E F 100 mm CT - 4 mm ET - 2,5 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0222E F 150 mm CT - 4 mm ET - 3 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0226E F 200 mm CT - 4 mm ET - 3,2 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0228E F 250 mm CT - 4 mm ET - 3,4 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0229E F 300 mm CT - 4 mm ET - 3,5 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0234E F 500 mm CT - 4 mm ET - 3,7 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0234M F 500 mm CT - 4 mm ET - 3,7 mm 25,0 mm 19 $ 4 - 5 days To cart
111-0240E F 700 mm CT - 4 mm ET - 3,8 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0240M F 700 mm CT - 4 mm ET - 3,8 mm 25,0 mm 19 $ 4 - 5 days To cart
111-0250E F 1000mm CT - 4 mm ET - 3,8 mm 25,4 mm 19 $ 4 - 5 days To cart
111-0250M F 1000mm CT - 4 mm ET - 3,8 mm 25,0 mm 19 $ 4 - 5 days To cart

Size: dia 38,1 mm

Code Focal Length Centre Thickness Edge Thickness Diameter Price Delivery Add to cart
111-0404E F 50 mm CT-10,5mm ET - 2,2 mm 38,1 mm 34 $ Request To cart
111-0410E F 100 mm CT - 6 mm ET - 2 mm 38,1 mm 34 $ 4 - 5 days To cart
111-0414E F 150 mm CT - 5 mm ET - 2,6 mm 38,1 mm 34 $ Request To cart
111-0418E F 200 mm CT - 5 mm ET - 3 mm 38,1 mm 34 $ Request To cart
111-0422E F 250 mm CT - 5 mm ET - 3,4 mm 38,1 mm 34 $ Request To cart
111-0426E F 300 mm CT - 5 mm ET - 3,7 mm 38,1 mm 34 $ Request To cart
111-0430E F 400 mm CT - 5 mm ET - 4 mm 38,1 mm 34 $ Request To cart
111-0434E F 500 mm CT - 5 mm ET - 4,2 mm 38,1 mm 33 $ Request To cart
111-0440E F 700 mm CT - 5 mm ET - 4,5 mm 38,1 mm 33 $ Request To cart
111-0450E F 1000mm CT - 5 mm ET - 4,6 mm 38,1 mm 33 $ Request To cart

Size: dia 50,8 mm

Code Focal Length Centre Thickness Edge Thickness Diameter Price Delivery Add to cart
111-0504E F 50 mm CT - 15 mm ET - 1,5 mm 50,8 mm 56 $ 4 - 5 days To cart
111-0508E F 75 mm CT - 10 mm ET - 2 mm 50,8 mm 53 $ Request To cart
111-0510E F 100 mm CT - 8,5 mm ET - 2 mm 50,8 mm 53 $ 4 - 5 days To cart
111-0512E F 150 mm CT - 6,1 mm ET - 2 mm 50,8 mm 52 $ 4 - 5 days To cart
111-0514E F 200 mm CT - 5 mm ET - 2 mm 50,8 mm 52 $ 4 - 5 days To cart
111-0514M F 200 mm CT - 5 mm ET - 2 mm 50,0 mm 52 $ 4 - 5 days To cart
111-0518E F 300 mm CT - 5 mm ET - 3 mm 50,8 mm 52 $ Request To cart
111-0518M F 300 mm CT - 5 mm ET - 3 mm 50,0 mm 52 $ 4 - 5 days To cart
111-0522E F 400 mm CT - 5 mm ET - 3,6 mm 50,8 mm 52 $ 4 - 5 days To cart
111-0522M F 400 mm CT - 5 mm ET - 3,6 mm 50,0 mm 52 $ 4 - 5 days To cart
111-0526E F 500 mm CT - 5 mm ET - 4 mm 50,8 mm 52 $ 4 - 5 days To cart
111-0526M F 500 mm CT - 5 mm ET - 4 mm 50,0 mm 52 $ 4 - 5 days To cart
111-0534E F 750 mm CT - 5 mm ET - 3,4 mm 50,8 mm 52 $ 4 - 5 days To cart
111-0544E F 1000mm CT - 5 mm ET - 4,4 mm 50,8 mm 52 $ Request To cart
111-0550E F 1200mm CT - 5 mm ET - 4,5 mm 50,8 mm 52 $ 4 - 5 days To cart
Delicious

Material BK7
Surface quality 40-20 scratch & dig (MIL-PRF-13830B)
Clear aperture 90% of the diameter
Diameter tolerance +0.00, -0.12 mm
Thickness tolerance ±0.5 mm
Surface irregularity λ/8 @ 633 nm
Concentricity 3 arcmin
Paraxial focal length ±2% @ 546 nm

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