Biconvex Lens BK7 25mmdia x 75mm F.L. Uncoated
| Focal Length (mm) | 75 |
|---|---|
| Diameter (mm) | 25 |
| Back Focal Length (mm) | 73.5 |
| Centre Thickness (mm) | 4.5 |
| Edge Thickness (mm) | 2.4 |
| Material | N-BK7 or equivalent |
| Coating | Uncoated |
Biconvex lenses are simple yet versatile optical components with two convex, spherical surfaces, typically of equal curvature. These lenses are widely used for imaging systems and laser beam focusing and control.
Knight Optical supplies precision N-BK7 biconvex lenses, available uncoated or with broadband anti-reflective (AR) coatings for visible to near-infrared (NIR) applications. We also offer custom biconvex lenses tailored to your specifications or can modify stock lenses for rapid turnaround. Additional AR coatings are available, including 630-1100nm and 1050-1700nm for infrared (IR) and telecom applications.
Stock lenses can be edged to smaller diameters.
Stock lenses can be ground to rectangular and square shaped apertures.
Shorter focal lengths in relation to the diameter available.
Mounting into lens cells.
Special anti-reflective coatings for broadband applications and wavelengths
Broadband Multilayer AR, R.avg<0.4%@1050-1700nm
Broadband Multilayer AR, R.avg<0.4%@630-1100nm
Extended broadband multilayer antireflective coating <0.5%@450-900nm (AV2 specification)
Broadband Multilayer AR, R.avg<0.4%@630-1100nm (AI1 custom specification)
Broadband Multilayer AR, R.avg<0.4%@1050-1700nm (AI2 custom specification)
