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Home > Products > Optics > Spherical Lenses > BK 7 Precision Bi-Concave Lenses

BK 7 Precision Bi-Concave Lenses
BK 7 Precision Bi-Concave Lenses

    • BK 7 optical glass
  • £l/4 surface irregularity, 40-20 scratch-dig
  • Broadband or laser line AR coatings available
  • Standard diameters and focal lengths

Product Description Product Detail Specifications Drawings Catalog PDF
Product Description
Designed to meet the demanding requirements of laser electro-optic applications, Newport's BK 7 precision bi-concave lenses are manufactured from fine annealed optical glass and are polished to tight tolerances using master test plates to ensure minimum wavefront distortion. Standard diameters from 6.35 mm to 50.8 mm and standard focal lengths are available either uncoated or multi-layer AR coated, with a choice of broadband coatings or a laser line V-coating for 1064 nm.


Ordering Information
To order a lens, find the ordering table with the lens Diameter required, then scroll down to the EFL needed, and then select the AR coating as required.

6.35mm Diameter BK 7 Bi-Concave Lens Ordering Information
 Quantity Model Description Price
  KBC013 BK 7 Bi-Concave Lens, 6.35 Dia, -6.3 EFL, Uncoated 
  KBC013AR.14 BK 7 Bi-Concave Lens, 6.35 Dia, -6.3 EFL, 430-700nm 
  KBC013AR.16 BK 7 Bi-Concave Lens, 6.35 Dia, -6.3 EFL, 650-1000nm 
  KBC013AR.18 BK 7 Bi-Concave Lens, 6.35 Dia, -6.3 EFL, 1000-1550nm 
  KBC013AR.33 BK 7 Bi-Concave Lens, 6.35 Dia, -6.3 EFL, 1064nm 
  KBC010 BK 7 Bi-Concave Lens, 6.35 Dia, -12.5 EFL, Uncoated 
  KBC010AR.14 BK 7 Bi-Concave Lens, 6.35 Dia, -12.5 EFL, 430-700nm 
  KBC010AR.16 BK 7 Bi-Concave Lens, 6.35 Dia, -12.5 EFL, 650-1000nm 
  KBC010AR.18 BK 7 Bi-Concave Lens, 6.35 Dia, -12.5 EFL, 1000-1550nm 
  KBC010AR.33 BK 7 Bi-Concave Lens, 6.35 Dia, -12.5 EFL, 1064nm 


12.7mm Diameter BK 7 Bi-Concave Lens Ordering Information
 Quantity Model Description Price
  KBC028 BK 7 Bi-Concave Lens, 12.7 Dia, -12.5 EFL, Uncoated 
  KBC028AR.14 BK 7 Bi-Concave Lens, 12.7 Dia, -12.5 EFL, 430-700nm 
  KBC028AR.16 BK 7 Bi-Concave Lens, 12.7 Dia, -12.5 EFL, 650-1000nm 
  KBC028AR.18 BK 7 Bi-Concave Lens, 12.7 Dia, -12.5 EFL, 1000-1550nm 
  KBC028AR.33 BK 7 Bi-Concave Lens, 12.7 Dia, -12.5 EFL, 1064nm 
  KBC025 BK 7 Bi-Concave Lens, 12.7 Dia, -25 EFL, Uncoated 
  KBC025AR.14 BK 7 Bi-Concave Lens, 12.7 Dia, -25 EFL, 430-700nm 
  KBC025AR.16 BK 7 Bi-Concave Lens, 12.7 Dia, -25 EFL, 650-1000nm 
  KBC025AR.18 BK 7 Bi-Concave Lens, 12.7 Dia, -25 EFL, 1000-1550nm 
  KBC025AR.33 BK 7 Bi-Concave Lens, 12.7 Dia, -25 EFL, 1064nm 
  KBC022 BK 7 Bi-Concave Lens, 12.7 Dia, -50 EFL, Uncoated 
  KBC022AR.14 BK 7 Bi-Concave Lens, 12.7 Dia, -50 EFL, 430-700nm 
  KBC022AR.16 BK 7 Bi-Concave Lens, 12.7 Dia, -50 EFL, 650-1000nm 
  KBC022AR.18 BK 7 Bi-Concave Lens, 12.7 Dia, -50 EFL, 1000-1550nm 
  KBC022AR.33 BK 7 Bi-Concave Lens, 12.7 Dia, -50 EFL, 1064nm 
  KBC019 BK 7 Bi-Concave Lens, 12.7 Dia, -75 EFL, Uncoated 
  KBC019AR.14 BK 7 Bi-Concave Lens, 12.7 Dia, -75 EFL, 430-700nm 
  KBC019AR.16 BK 7 Bi-Concave Lens, 12.7 Dia, -75 EFL, 650-1000nm 
  KBC019AR.18 BK 7 Bi-Concave Lens, 12.7 Dia, -75 EFL, 1000-1550nm 
  KBC019AR.33 BK 7 Bi-Concave Lens, 12.7 Dia, -75 EFL, 1064nm 
  KBC016 BK 7 Bi-Concave Lens, 12.7 Dia, -100 EFL, Uncoated 
  KBC016AR.14 BK 7 Bi-Concave Lens, 12.7 Dia, -100 EFL, 430-700nm 
  KBC016AR.16 BK 7 Bi-Concave Lens, 12.7 Dia, -100 EFL, 650-1000nm 
  KBC016AR.18 BK 7 Bi-Concave Lens, 12.7 Dia, -100 EFL, 1000-1550nm 
  KBC016AR.33 BK 7 Bi-Concave Lens, 12.7 Dia, -100 EFL, 1064nm 


25.4mm Diameter BK 7 Bi-Concave Lens Ordering Information
 Quantity Model Description Price
  KBC046 BK 7 Bi-Concave Lens, 25.4 Dia, -25 EFL, Uncoated 
  KBC046AR.14 BK 7 Bi-Concave Lens, 25.4 Dia, -25 EFL, 430-700nm 
  KBC046AR.16 BK 7 Bi-Concave Lens, 25.4 Dia, -25 EFL, 650-1000nm 
  KBC046AR.18 BK 7 Bi-Concave Lens, 25.4 Dia, -25 EFL, 1000-1550nm 
  KBC046AR.33 BK 7 Bi-Concave Lens, 25.4 Dia, -25 EFL, 1064nm 
  KBC043 BK 7 Bi-Concave Lens, 25.4 Dia, -50 EFL, Uncoated 
  KBC043AR.14 BK 7 Bi-Concave Lens, 25.4 Dia, -50 EFL, 430-700nm 
  KBC043AR.16 BK 7 Bi-Concave Lens, 25.4 Dia, -50 EFL, 650-1000nm 
  KBC043AR.18 BK 7 Bi-Concave Lens, 25.4 Dia, -50 EFL, 1000-1550nm 
  KBC043AR.33 BK 7 Bi-Concave Lens, 25.4 Dia, -50 EFL, 1064nm 
  KBC040 BK 7 Bi-Concave Lens, 25.4 Dia, -75 EFL, Uncoated 
  KBC040AR.14 BK 7 Bi-Concave Lens, 25.4 Dia, -75 EFL, 430-700nm 
  KBC040AR.16 BK 7 Bi-Concave Lens, 25.4 Dia, -75 EFL, 650-1000nm 
  KBC040AR.18 BK 7 Bi-Concave Lens, 25.4 Dia, -75 EFL, 1000-1550nm 
  KBC040AR.33 BK 7 Bi-Concave Lens, 25.4 Dia, -75 EFL, 1064nm 
  KBC037 BK 7 Bi-Concave Lens, 25.4 Dia, -100 EFL, Uncoated 
  KBC037AR.14 BK 7 Bi-Concave Lens, 25.4 Dia, -100 EFL, 430-700nm 
  KBC037AR.16 BK 7 Bi-Concave Lens, 25.4 Dia, -100 EFL, 650-1000nm 
  KBC037AR.18 BK 7 Bi-Concave Lens, 25.4 Dia, -100 EFL, 1000-1550nm 
  KBC037AR.33 BK 7 Bi-Concave Lens, 25.4 Dia, -100 EFL, 1064nm 
  KBC034 BK 7 Bi-Concave Lens, 25.4 Dia, -150 EFL, Uncoated 
  KBC034AR.14 BK 7 Bi-Concave Lens, 25.4 Dia, -150 EFL, 430-700nm 
  KBC034AR.16 BK 7 Bi-Concave Lens, 25.4 Dia, -150 EFL, 650-1000nm 
  KBC034AR.18 BK 7 Bi-Concave Lens, 25.4 Dia, -150 EFL, 1000-1550nm 
  KBC034AR.33 BK 7 Bi-Concave Lens, 25.4 Dia, -150 EFL, 1064nm 
  KBC031 BK 7 Bi-Concave Lens, 25.4 Dia, -200 EFL, Uncoated 
  KBC031AR.14 BK 7 Bi-Concave Lens, 25.4 Dia, -200 EFL, 430-700nm 
  KBC031AR.16 BK 7 Bi-Concave Lens, 25.4 Dia, -200 EFL, 650-1000nm 
  KBC031AR.18 BK 7 Bi-Concave Lens, 25.4 Dia, -200 EFL, 1000-1550nm 
  KBC031AR.33 BK 7 Bi-Concave Lens, 25.4 Dia, -200 EFL, 1064nm 


50.8mm Diameter BK 7 Bi-Concave Lens Ordering Information
 Quantity Model Description Price
  KBC085 BK 7 Bi-Concave Lens, 50.8 Dia, -75 EFL, Uncoated 
  KBC085AR.14 BK 7 Bi-Concave Lens, 50.8 Dia, -75 EFL, 430-700nm 
  KBC085AR.16 BK 7 Bi-Concave Lens, 50.8 Dia, -75 EFL, 650-1000nm 
  KBC085AR.18 BK 7 Bi-Concave Lens, 50.8 Dia, -75 EFL, 1000-1550nm 
  KBC085AR.33 BK 7 Bi-Concave Lens, 50.8 Dia, -75 EFL, 1064nm 
  KBC082 BK 7 Bi-Concave Lens, 50.8 Dia, -100 EFL, Uncoated 
  KBC082AR.14 BK 7 Bi-Concave Lens, 50.8 Dia, -100 EFL, 430-700nm 
  KBC082AR.16 BK 7 Bi-Concave Lens, 50.8 Dia, -100 EFL, 650-1000nm 
  KBC082AR.18 BK 7 Bi-Concave Lens, 50.8 Dia, -100 EFL, 1000-1550nm 
  KBC082AR.33 BK 7 Bi-Concave Lens, 50.8 Dia, -100 EFL, 1064nm 
  KBC079 BK 7 Bi-Concave Lens, 50.8 Dia, -150 EFL, Uncoated 
  KBC079AR.14 BK 7 Bi-Concave Lens, 50.8 Dia, -150 EFL, 430-700nm 
  KBC079AR.16 BK 7 Bi-Concave Lens, 50.8 Dia, -150 EFL, 650-1000nm 
  KBC079AR.18 BK 7 Bi-Concave Lens, 50.8 Dia, -150 EFL, 1000-1550nm 
  KBC079AR.33 BK 7 Bi-Concave Lens, 50.8 Dia, -150 EFL, 1064nm 
  KBC076 BK 7 Bi-Concave Lens, 50.8 Dia, -200 EFL, Uncoated 
  KBC076AR.14 BK 7 Bi-Concave Lens, 50.8 Dia, -200 EFL, 430-700nm 
  KBC076AR.16 BK 7 Bi-Concave Lens, 50.8 Dia, -200 EFL, 650-1000nm 
  KBC076AR.18 BK 7 Bi-Concave Lens, 50.8 Dia, -200 EFL, 1000-1550nm 
  KBC076AR.33 BK 7 Bi-Concave Lens, 50.8 Dia, -200 EFL, 1064nm 
  KBC073 BK 7 Bi-Concave Lens, 50.8 Dia, -250 EFL, Uncoated 
  KBC073AR.14 BK 7 Bi-Concave Lens, 50.8 Dia, -250 EFL, 430-700nm 
  KBC073AR.16 BK 7 Bi-Concave Lens, 50.8 Dia, -250 EFL, 650-1000nm 
  KBC073AR.18 BK 7 Bi-Concave Lens, 50.8 Dia, -250 EFL, 1000-1550nm 
  KBC073AR.33 BK 7 Bi-Concave Lens, 50.8 Dia, -250 EFL, 1064nm 
  KBC070 BK 7 Bi-Concave Lens, 50.8 Dia, -500 EFL, Uncoated 
  KBC070AR.14 BK 7 Bi-Concave Lens, 50.8 Dia, -500 EFL, 430-700nm 
  KBC070AR.16 BK 7 Bi-Concave Lens, 50.8 Dia, -500 EFL, 650-1000nm 
  KBC070AR.18 BK 7 Bi-Concave Lens, 50.8 Dia, -500 EFL, 1000-1550nm 
  KBC070AR.33 BK 7 Bi-Concave Lens, 50.8 Dia, -500 EFL, 1064nm 
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