Biconcave Lenses

  • Have negative focal lengths diverge collimated incident light
  • Form only virtual images which are seen through the lens
  • Minimize spherical aberration, coma and distortion at unit conjugate ratio  

These lenses are symmetrical with equal radii on both sides. The biconcave lenses are often used to expand light beams or to increase focal lengths in optical systems, and are normally used in combination with other lenses. Among the many devices utilising biconcave lenses are laser beam expanders, optical character readers, viewers and projection systems.

A variety of anti-reflection coatings is available for these lenses. For appropriate 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

Material
Focal Length
Centre thickness CT
Edge thickness ET
Diameter

BK7, Size: dia 12,7 mm

Code Material Focal Length Centre thickness CT Edge thickness ET Diameter Price Delivery Add to cart
114-0104E BK7 F -12,7 mm CT - 3,2 mm ET - 5 mm 12,7 mm 17 $ 4 - 5 days To cart
114-0106E BK7 F -25 mm CT - 2,2 mm ET - 3 mm 12,7 mm 17 $ 4 - 5 days To cart
114-0108E BK7 F -40 mm CT - 2,4 mm ET - 3 mm 12,7 mm 17 $ 4 - 5 days To cart
114-0110E BK7 F -50 mm CT - 2,6 mm ET - 3 mm 12,7 mm 17 $ Request To cart
114-0112E BK7 F -60 mm CT - 2,6 mm ET - 3 mm 12,7 mm 17 $ 4 - 5 days To cart
114-0114E BK7 F -75 mm CT - 2,7 mm ET - 3 mm 12,7 mm 17 $ 4 - 5 days To cart
114-0118E BK7 F -100 mm CT - 2,8 mm ET - 3 mm 12,7 mm 17 $ Request To cart
114-0120E BK7 F -125 mm CT - 1,7 mm ET - 2 mm 12,7 mm 16 $ 4 - 5 days To cart
114-0124E BK7 F -150 mm CT - 1,8 mm ET - 2 mm 12,7 mm 16 $ 4 - 5 days To cart
114-0128E BK7 F -200 mm CT - 1,8 mm ET - 2 mm 12,7 mm 16 $ 4 - 5 days To cart
114-0132E BK7 F -250 mm CT - 1,8 mm ET - 2 mm 12,7 mm 16 $ 4 - 5 days To cart

BK7, Size: dia 25,4 mm

Code Material Focal Length Centre thickness CT Edge thickness ET Diameter Price Delivery Add to cart
114-0204E BK7 F -25 mm CT - 4,8 mm ET - 11,2 mm 25,4 mm 21 $ 4 - 5 days To cart
114-0206E BK7 F -40 mm CT - 2,7 mm ET - 6,1 mm 25,4 mm 21 $ 4 - 5 days To cart
114-0206M BK7 F -40 mm CT - 2,7 mm ET - 6,1 mm 25,0 mm 21 $ 4 - 5 days To cart
114-0208E BK7 F -50 mm CT - 4,4 mm ET - 7.5 mm 25,4 mm 21 $ 4 - 5 days To cart
114-0208M BK7 F -50 mm CT - 4,4 mm ET - 7.5 mm 25,0 mm 21 $ 4 - 5 days To cart
114-0210E BK7 F -60 mm CT - 2,6 mm ET - 5 mm 25,4 mm 21 $ 4 - 5 days To cart
114-0212E BK7 F -75 mm CT - 3,7 mm ET - 4,7 mm 25,4 mm 20 $ 4 - 5 days To cart
114-0214E BK7 F -100 mm CT - 3,2 mm ET - 4 mm 25,4 mm 19 $ Request To cart
114-0218E BK7 F -125 mm CT - 3,1 mm ET - 4 mm 25,4 mm 19 $ 4 - 5 days To cart
114-0220E BK7 F -150 mm CT - 3 mm ET - 4 mm 25,4 mm 19 $ 4 - 5 days To cart
114-0224E BK7 F -200 mm CT - 2,8 mm ET - 3,5 mm 25,4 mm 19 $ 4 - 5 days To cart
114-0228E BK7 F -250 mm CT - 2,9 mm ET - 3,5 mm 25,4 mm 19 $ 4 - 5 days To cart
114-0234E BK7 F -400 mm CT - 3,2 mm ET - 3,5 mm 25,4 mm 19 $ 4 - 5 days To cart
114-0238E BK7 F -500 mm CT - 3,2 mm ET - 3,5 mm 25,4 mm 19 $ 4 - 5 days To cart

UVFS, Size: dia 12,7 mm

Code Material Focal Length Centre thickness CT Edge thickness ET Diameter Price Delivery Add to cart
114-1104E UVFS F -12,5 mm CT - 3,7 mm ET - 5,8 mm 12,7 mm 54 $ 4 - 5 days To cart
114-1108E UVFS F -25 mm CT - 2,3 mm ET - 3,2 mm 12,7 mm 54 $ 4 - 5 days To cart
114-1110E UVFS F -30 mm CT - 1,3 mm ET - 2,5 mm 12,7 mm 54 $ 4 - 5 days To cart
114-1114E UVFS F -50 mm CT - 2,6 mm ET - 3 mm 12,7 mm 54 $ 4 - 5 days To cart
114-1118E UVFS F -75 mm CT - 2,7 mm ET - 3 mm 12,7 mm 54 $ 4 - 5 days To cart
114-1122E UVFS F -100 mm CT - 2,8 mm ET - 3 mm 12,7 mm 52 $ 4 - 5 days To cart

UVFS, Size: dia 25,4 mm

Code Material Focal Length Centre thickness CT Edge thickness ET Diameter Price Delivery Add to cart
114-1204E UVFS F -25 mm CT - 4,2 mm ET - 10,2mm 25,4 mm 78 $ 4 - 5 days To cart
114-1204M UVFS F -25 mm CT - 4,2 mm ET - 10,2mm 25,0 mm 78 $ 4 - 5 days To cart
114-1205E UVFS F -30 mm CT - 3 mm ET - 8,8 mm 25,4 mm 78 $ 4 - 5 days To cart
114-1208E UVFS F -50 mm CT - 4,2 mm ET - 6 mm 25,4 mm 78 $ 4 - 5 days To cart
114-1212E UVFS F -75 mm CT - 3,8 mm ET - 5 mm 25,4 mm 78 $ 4 - 5 days To cart
114-1216E UVFS F -100 mm CT - 3,6 mm ET - 4,5mm 25,4 mm 78 $ 4 - 5 days To cart
114-1220E UVFS F -150 mm CT - 3,9 mm ET - 4,5mm 25,4 mm 78 $ 4 - 5 days To cart
114-1220M UVFS F -150 mm CT - 3,9 mm ET - 4,5mm 25,0 mm 78 $ 4 - 5 days To cart
114-1224E UVFS F -200 mm CT - 3 mm ET - 3,9mm 25,4 mm 77 $ 4 - 5 days To cart
Delicious

 

Material BK7, UV FS
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:
   BK7
   UV FS


±2% @ 546 nm
±2% @ 355 nm

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