Ball Lens
描述
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 | 0.001-0.005 |
| 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 | 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 |
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 |
Parameters Explaination:
EFL: Effective Focal Length BFL: Back Focal Length
CT : Center Thinkness C : Lens Center
