For BK7A, the Design Focal Length @ 633nm
Bi-convex lenses are useful for a wide range of finite conjugate or illumination applications. These lenses are manufactured from BK7A or Fused Silica. Lenses are supplied uncoated. These bi-convex lenses may be combined with other lenses to form complex imaging systems. Anti-reflection coatings are available. Please contact the Lambda’s sales team for more information about coatings.
| Material: | BK7A UV Fused Silica |
| Surface Flatness: | < λ / 10 @ 633 nm |
| Surface Quality: | <10/5 (both sides) |
| Centration Error: | < 3 arc min |
| Focal Length Tolerance: | < ± 0.5% |
| Diameter Tolerance: | < + 0.00 / – 0.20 mm |
| Thickness Tolerance: | < ± 0.25 mm |
| Clear Aperture: | > 85% of diameter |
Bi-convex Lenses (BCX)
| Dimension | 10mm dia, 0.5" dia, 15mm dia, 0.75" dia, 1.0" dia, 5mm dia, 7.5mm dia |
|---|---|
| Material | UV Grade Fused Silica, BK7 Grade A |
| Focal Length | 010 mm @ Design FL, 015 mm @ Design FL, 018 mm @ Design FL, 019 mm @ Design FL, 020 mm @ Design FL, 022 mm @ Design FL, 025 mm @ Design FL, 035 mm @ Design FL, 038 mm @ Design FL, 050 mm @ Design FL, 060 mm @ Design FL, 075 mm @ Design FL, 100 mm @ Design FL, 1000 mm @ Design FL |
Bi-Concave Lens (BCC) 
