N-BK7 Plano-Convex Round Cylindrical Lenses，Uncoated/AR350-1700nm
Tuniu N-BK7 Plano-Convex Round Cylindrical Lenses are high-performance one-dimensional beam-shaping optical elements engineered to adjust spot size with single-axis light focusing. Featuring a plano-convex cylindrical profile with positive focal length, these lenses effectively suppress spherical and chromatic aberration when light enters from the convex side for optimal beam quality.
Fabricated from premium N-BK7 optical glass with excellent uniformity and internal homogeneity, this standard substrate delivers stable optical performance for visible and near-infrared applications. Ideal for high-power laser systems, satellite optics and astronomical optical setups, these cylindrical lenses ensure reliable long-term operation under demanding working conditions.
Available substrate options include N-BK7 and UV fused silica, supplied in uncoated and anti-reflection (AR) coated versions. Uncoated lenses feature a broad spectral range and high laser damage threshold, while N-BK7 models offer three standard AR coating options covering 350–700 nm, 650–1050 nm and 1050–1700 nm. Custom sizes, focal lengths, materials and specialized coatings are available upon request to fit bespoke application requirements.
Parameters
| Optical materials | N-BK7 | Size | Ø25.4 mm |
| Clear aperture | > Ø21.0 mm | Refractive index | 1.52 |
| Abbe | Vd = 64.17 | Design wavelength | 587.6 nm |
| Diameter tolerance | + 0.0/ -0.1 mm | Thickness tolerance | ± 0.1 mm |
| Focal length tolerance | ± 1% | Eccentricity | ≤ 3 arcmin |
| Face PV value | λ | Number of spherical aperture | 3 |
| Flatness (@633 nm) | λ/2 | Surface smoothness (scratches/pitting) | 40/20(Uncoated), 60/40 |
| Operating band | 350-2000 nm(Uncoated), AR350–700 nm/650–1050 nm/1050–1700 nm | ||
| Anti-reflective coating | Ravg < 0.5%@350-700 nm/350–700 nm/650–1050 nm/1050–1700 nm | ||
Model
N-BK7 Plano-Convex Round Cylindrical Lenses, Uncoated/AR350–700 nm/650–1050 nm/1050–1700 nm,
Mounted in 25.4 mm-OD Retaining Ring
| Size, mm | Focal Length, mm |
| 25.4 | 50.0/75.0/100.0/150.0/200.0/250.0/300.0/400.0/500.0/1000.0 |