UV Fused Silica Double-Convex(DCX) Lenses, Uncoated/AR250-1650nm
UV Fused Silica Double Convex Lenses are precision optical components substrate-constructed from high-grade UV fused silica. Compared with conventional K9 optical glass, UV fused silica features an extended transmission spectrum covering 185 nm to 2.1 μm, delivering exceptional transmittance especially within the ultraviolet range. This material also offers a lower refractive index, superior optical homogeneity, minimal thermal expansion coefficient, excellent chemical resistance and extremely low fluorescence performance, making it an ideal substrate for a wide variety of high-precision optical components.
Double convex lenses feature a positive focal length with two convex surfaces of equal curvature, designed to focus incident light into a precise focal spot. This symmetric configuration provides optimal aberration correction when the conjugate ratio between object and image distance ranges from 5:1 to 1:5; for magnification requirements outside this range, plano-convex lenses are generally more suitable. Tuniu Optics supplies UV fused silica double convex lenses in a comprehensive range of sizes and focal lengths, available in both uncoated and anti-reflection coated versions. Broadband AR coatings optimized for the 250–400 nm ultraviolet waveband are offered to enhance optical transmittance and meet diverse application demands. Customized lens specifications are available according to specific requirements.
Parameters
| Material | UV Fused Silica |
| Design Wavelength | 588 nm |
| Diameter Tolerance | + 0.0/ -0.1 mm |
| Irregularity (P-V) | λ/4@632.8 nm |
| Center Thickness Tolerance | ± 0.2 mm |
| Focal Length Tolerance | ± 1% |
| Centering Tolerance | < 3 arcmin |
| Surface Quality | 40/20 |
| Bevel | 0.2 mm X 45° |
Model
| Dia.*, mm | Focal Length, mm | Coating |
| 12.7 | 12.7/15/20/30/40/50 | Uncoated, Ravg < 0.5%@250~450 nm, Ravg < 0.5%@350~700 nm, Ravg < 0.5%@650~1100nm, Ravg < 0.5%@1000~1650 nm |
| 25.4 | 25.4/30/35/40/50/61.8/75/100/125/150/ 200/250/300/500/750/800/1000 | |
| 50.8 | 60/75/100/150/200/250/300/500/1000 |
* Other Dia. Upon request.

