Uncoated H-K9L Ball Lenses
K9 Ball Lenses are precision optical glass spheres made of K9 optical glass. They optimize signal coupling between optical fibers, emitters and detectors to enhance signal quality. They are also widely applied in endoscopes, barcode scanning, aspherical lens preform processing, optical sensors and other fields. Thanks to the short back focal length of ball lenses, the spacing between the lens and optical fiber can be minimized, making them ideal for fiber optic applications.
K9 optical glass features excellent broadband transmittance from 350 nm to 2000 nm, high hardness, strong resistance to physical and chemical erosion, and extremely low bubble and impurity content. It is widely used as a base material for a full range of optical components.
Parameters
| Material | H-K9L Optical Glass |
| Design Wavelength | 587.6 nm |
| Diameter Tolerance | + / – 0.005 mm |
| Ellipsoid | ± 0.003 mm |
| Irregularity (P-V) | λ/4 @632.8 nm |
| Surface Quality | 60-40 |
| Coating | Uncoated |
Model
| Dia., mm | EFL, mm | BFL, mm |
| 1.00 2.00 3.00 4.00 5.00 6.00 7.00 8.00 9.00 10.00 | 0.73 1.47 2.20 2.93 3.67 4.40 5.14 5.87 6.60 7.34 | 0.23 0.47 0.70 0.93 1.17 1.40 1.64 1.87 2.10 2.34 |