Tel:+86 431 89825768


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Changchun Worldhawk
Optoelectronics Co.,Ltd
No.189,Chang-Ji Nan Road.
Changchun,China 130022

Tel:+86 431 89825768

Copyright 2017,Worldhawk Optics Co.,LTD
No.189,Chang-Ji Nan Road.Changchun,China 130022  Powered by  Ji ICP No.10005497

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Optical Ge Ball lens


You are here: (Polished Optical Quartz Glass Hemisphere


Ball lenses are commonly used for laser collimating and focusing, laser-to-fiber coupling, fiber-to-fiber coupling, Solar-photovoltaic and fiber-to-detector coupling.  

Worldhawk can provide spherical ball lenses and half ball lenses in a range of substrates for performance in the ultraviolet to the NIR. Such as including H-K9L(N-BK7), Sapphire, CaF2, BaF2, ZnSe or custom materials upon request.

Ball lenses feature short back focal lengths to minimize the distance needed from the ball Lens to the optical fiber. Ball lenses are commonly used to improve signal quality in fiber coupling applications, or for use in endoscopy or bar code scanning applications.

Half-Ball (hemispherical) lenses are ideal for applications such as fiber communication,endoscopy, microscopy, optical pick-up devices,and laser measurement systems.


Worldhawk ball lens and half ball lens



Parameters Explaination:



EFL: Effective Focal Length    BFL: Back Focal Length
CT  : Center Thinkness           C    : Lens Center


Specifications of ball lens (Half ball lens) 

  Item    Parameter (Optical glass ball lens; Half ball lens)

  K9 (BK7), Optical sapphire(ruby) glass, Fused Silica, JGS1,

  ZnSe,  Zns, Ge, Caf2, B270, LaF52, Schott glass

  Diameter   1~150mm, 1mm, 2mm, 3mm…
  Dia. Tolerance   +/-0.002mm
  Roundness   0.003-0.005
  Surface Accuracy   <2λ
  Irregularity   λ/2 @632.8nm
  Surface Quality   <40/20 scratch/dig
  Clear Aperture   >92%
  Focal length tolerance   +/-1% (+/-5% for 400 series)
  Centration   3 arc min or better
  Coating   Upon customer request


Material specification

 Glass  Materials



 Dispersion  Coefficient(vd)

 Glass  Materials



 Dispersion  Coefficient(vd)
  H-Zlaf90   2.00069   25.43   Sapphire   1.768   72.20
  H-Zlaf50D   1.804   46.58   ZnSe   2.403   N/A
  H-ZF7LA   1.80518   25.46   Silicon   3.422   N/A
  Fused Silica   1.458   67.70   Germanium   4.003   N/A
  H-K9L(N-BK7)   1.517   64.20      


Material Characteristics


Fused Silica Ball and Half-Ball Lenses:
1,Excellent UV Transmission

   (From 200nm to 2.2μm)
2,Low Coefficient of Thermal Expansion

Sapphire and Ruby Ball Lens(Half ball lens):
1,Excellent for Severe Environments
2,High Strength and Hardness
3,High Chemical Stability
4,Ruby Balls are easier to see

H-K9L (N-BK7) Ball Lenses:
1,Can be Used as Fiber Coupling Spheres or      Collimating Lenses
2,Ideal Pre-Forms for Aspheric Lenses
3,Available in a Variety of Sizes

High Index Ball Lenses:
1,Index of Refraction of 1.8-2.0
2,High Tolerance
3,High Index for a Closer Focal Distan


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