H-K9L Plano-Convex Lenses, Uncoated/AR400-1650nm
Tuniu Optics plano-convex lenses are fabricated from high-grade H-K9L glass. If the special merits of UV fused silica — such as high transmittance in the ultraviolet range and a low thermal expansion coefficient — are not required, H-K9L is the preferred material.
These lenses feature a positive focal length and are suitable for both infinite and finite conjugate applications. Plano-convex lenses can focus collimated beams and collimate light emitted from point sources. To minimize spherical aberration, the curved surface should face the incoming collimated beam for focusing; for collimating a point light source, the plane surface should face the light source.
Parameters
| Material | H-K9L(K9) |
| Design Wavelength | 587.6 nm |
| Diameter Tolerance | + 0.0/-0.1 mm |
| Focal Length Tolerance | ± 2 % |
| Refractive Index | 1.5168 |
| Clear aperture | > 90% |
| Irregularity (P-V) | λ/4@632.8 nm |
| Surface Quality | 40/20 |
| Center Thickness Tolerance | ± 0.2 mm |
| Centering Tolerance | < 3 arcmin |
| Abbe | v = 64.17 |
| Bevel | 0.2 mm X 45° |
| Coating | Uncoated, Ravg < 0.5%@400~700 nm, Ravg < 0.5%@650~1050 nm, Ravg < 0.5%@1000~1650 nm |
Model
| Dia.*, mm | Focal Length, mm | Coating |
| φ25 | 25.4/26.7/31.5/40/63/76/80/100/125/160/ 200/250/315/400/500/630/800/1000/ 1600/2000/2500 | Uncoated, Ravg < 0.5%@400~700 nm, Ravg < 0.5%@650~1050 nm, Ravg < 0.5%@1000~1650 nm |
| Φ50 | 63/80/100/160/250/500 |
* Other Dia. Upon request. Up to φ100mm.