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BK7 Biconvex Lenses

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.

Code Diameter - Metric Diameter - English Focal Length Centre thickness Edge thickness Item price, USD In stock Choose diameter Add to cart
111-0104 12,5 mm 12,7 mm F 12,7 mm CT - 4,8 mm ET - 1,2 mm 18.- In stock ME Add to cart
111-0108 12,5 mm 12,7 mm F 25 mm CT - 3,5 mm ET - 1,9 mm 18.- In stock ME Add to cart
111-0114 12,5 mm 12,7 mm F 40 mm CT - 2,5 mm ET - 2 mm 18.- Request ME Add to cart
111-0116 12,5 mm 12,7 mm F 50 mm CT - 2,5 mm ET - 2 mm 18.- In stock ME Add to cart
111-0118 12,5 mm 12,7 mm F 60 mm CT - 2,5 mm ET - 2 mm 18.- In stock ME Add to cart
111-0120 12,5 mm 12,7 mm F 75 mm CT - 2,5 mm ET - 2 mm 17.- In stock ME Add to cart
111-0124 12,5 mm 12,7 mm F 100 mm CT - 2 mm ET - 1,6 mm 17.- In stock ME Add to cart
111-0128 12,5 mm 12,7 mm F 125 mm CT - 2 mm ET - 1,7 mm 17.- Request ME Add to cart
111-0132 12,5 mm 12,7 mm F 150 mm CT - 2 mm ET - 1,7 mm 17.- Request ME Add to cart
111-0136 12,5 mm 12,7 mm F 200 mm CT - 2 mm ET - 1,9 mm 17.- In stock ME Add to cart
111-0140 12,5 mm 12,7 mm F 250 mm CT - 2 mm ET - 1,9 mm 17.- In stock ME Add to cart
111-0144 12,5 mm 12,7 mm F 300 mm CT - 2 mm ET - 1,9 mm 17.- In stock ME Add to cart
111-0148 12,5 mm 12,7 mm F 400 mm CT - 2 mm ET - 1,9 mm 17.- In stock ME Add to cart
111-0204 25 mm 25,4 mm F 25 mm CT - 9 mm ET - 2,1 mm 23.- In stock ME Add to cart
111-0206 25 mm 25,4 mm F 30 mm CT - 7,5 mm ET - 2,4 mm 23.- In stock ME Add to cart
111-0208 25 mm 25,4 mm F 40 mm CT - 6 mm ET - 3 mm 23.- In stock ME Add to cart
111-0210 25 mm 25,4 mm F 50 mm CT - 6 mm ET - 3 mm 23.- Request ME Add to cart
111-0214 25 mm 25,4 mm F 60 mm CT - 4 mm ET - 1,6 mm 23.- In stock ME Add to cart
111-0216 25 mm 25,4 mm F 75 mm CT - 4 mm ET - 2 mm 23.- In stock ME Add to cart
111-0218 25 mm 25,4 mm F 100 mm CT - 4 mm ET - 2,5 mm 21.- Request ME Add to cart
111-0222 25 mm 25,4 mm F 150 mm CT - 4 mm ET - 3 mm 21.- Request ME Add to cart
111-0226 25 mm 25,4 mm F 200 mm CT - 4 mm ET - 3,2 mm 21.- In stock ME Add to cart
111-0228 25 mm 25,4 mm F 250 mm CT - 4 mm ET - 3,4 mm 21.- In stock ME Add to cart
111-0234 25 mm 25,4 mm F 500 mm CT - 4 mm ET - 3,7 mm 21.- In stock ME Add to cart
111-0240 25 mm 25,4 mm F 700 mm CT - 4 mm ET - 3,8 mm 21.- In stock ME Add to cart
111-0250 25 mm 25,4 mm F 1000mm CT - 4 mm ET - 3,8 mm 21.- In stock ME Add to cart
111-0404 40 mm 38,1 mm F 50 mm CT-10,5mm ET - 2,2 mm 34.- In stock ME Add to cart
111-0410 40 mm 38,1 mm F 100 mm CT - 6 mm ET - 2 mm 34.- In stock ME Add to cart
111-0414 40 mm 38,1 mm F 150 mm CT - 5 mm ET - 2,6 mm 34.- Request ME Add to cart
111-0418 40 mm 38,1 mm F 200 mm CT - 5 mm ET - 3 mm 34.- In stock ME Add to cart
111-0422 40 mm 38,1 mm F 250 mm CT - 5 mm ET - 3,4 mm 34.- Request ME Add to cart
111-0426 40 mm 38,1 mm F 300 mm CT - 5 mm ET - 3,7 mm 34.- In stock ME Add to cart
111-0430 40 mm 38,1 mm F 400 mm CT - 5 mm ET - 4 mm 34.- Request ME Add to cart
111-0434 40 mm 38,1 mm F 500 mm CT - 5 mm ET - 4,2 mm 33.- Request ME Add to cart
111-0440 40 mm 38,1 mm F 700 mm CT - 5 mm ET - 4,5 mm 33.- Request ME Add to cart
111-0450 40 mm 38,1 mm F 1000mm CT - 5 mm ET - 4,6 mm 33.- Request ME Add to cart
111-0504 50 mm 50,8 mm F 50 mm CT - 15 mm ET - 1,5 mm 56.- In stock ME Add to cart
111-0508 50 mm 50,8 mm F 75 mm CT - 10 mm ET - 2 mm 53.- In stock ME Add to cart
111-0510 50 mm 50,8 mm F 100 mm CT - 8,5 mm ET - 2 mm 53.- Request ME Add to cart
111-0512 50 mm 50,8 mm F 150 mm CT - 6,1 mm ET - 2 mm 52.- In stock ME Add to cart
111-0514 50 mm 50,8 mm F 200 mm CT - 5 mm ET - 2 mm 52.- In stock ME Add to cart
111-0518 50 mm 50,8 mm F 300 mm CT - 5 mm ET - 3 mm 52.- Request ME Add to cart
111-0522 50 mm 50,8 mm F 400 mm CT - 5 mm ET - 3,6 mm 52.- In stock ME Add to cart
111-0526 50 mm 50,8 mm F 500 mm CT - 5 mm ET - 4 mm 52.- In stock ME Add to cart
111-0534 50 mm 50,8 mm F 750 mm CT - 5 mm ET - 3,4 mm 52.- In stock ME Add to cart
111-0544 50 mm 50,8 mm F 1000mm CT - 5 mm ET - 4,4 mm 52.- In stock ME Add to cart
111-0550 50 mm 50,8 mm F 1200mm CT - 5 mm ET - 4,5 mm 52.- In stock ME Add to cart
For metric dimensions please add to catalogue number code M, for English – code E.

All prices are FCA Vilnius.
Prices are valid only for direct orders. For orders via distributors contact them directly.
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