Dia 1~12mm Optical Glass Hemisphere Or Spherical Lens K9 Glass Ball Lens And Half Ball Lens
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.
Technical Drawings
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) |
| Material | K9 (BK7), Optical sapphire(ruby) glass, fused silica, JGS1, ZnSe, Zns, Ge, Caf2, b270, LaF52, Schott glass |
| Diameter | 1~150mm, 1mm 2mm 4mm 5mm 12mm… |
| 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 |
K9 Glass (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 |
Package
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Dia 1~12mm Optical Glass Hemisphere Or Spherical Lens K9 Glass Ball Lens And Half Ball Lens Images
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