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        Your present location:产品首页 >> PRUDUCTS >> Micro Lens >> micro concave lens
        • Name: micro concave lens
        • 产品编号: WHK-MC
        • date: 2017-07-09
        • Views : 87

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        Product Description

        You are here: (1mm bk7 k9 glass optical micro ball lens) 

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        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.

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        Worldhawk ball lens and half ball lens

        WORLDHAWK Optical Glass Ball lens Sapphire Ball lens  Optical ZnSe Ball lens Optical Si Ge Ball lens.jpg

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        Parameters Explaination:

        worldhawk ball lens and half ball lens drawing.jpg

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

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        Specifications of ball lens (Half ball lens) 

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

          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

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        Material specification

         Glass  Materials

        Refractive

         (nd

         Dispersion  Coefficient(vd)

         Glass  Materials

        Refractive

         (nd

         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      

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        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 Distance

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        Blank  Products

        Optical Ball Lens Blank Products Worldhawk.jpg

        Key words : Micro concave lens