$22.00
Specifications:
| Lens Form | Biconvex Lens | Material | N-BK7 |
| Diameters(mm) | 50.8(+0.0/-0.1) | Design Wavelength(nm) | 587.6 |
| Effective Focal Length EFL(mm) | 250.00±1% | Back Focal Length BFL(mm) | 248.18 |
| Coating | Uncoated | Surface Quality(S/D) | 40/20 |
| Irregularity@632.8nm | λ/2 | Centration Error(arc min) | ≤2 |
| Center Thickness | 5.5±0.1 | Edge Thickness | 3.0±0.1 |
| Curvature Radius R1 | 256.61 | Clear Aperture | 90% |
| Protective Chamfer | 0.2mmx45° |
Dia50.8mm EFL250mm N-BK7 Biconvex Lenses Uncoated, Code: 1107-039
A Biconvex Lens, or a Double Convex Lens, is an optical lens having two spherical sides with identical radii of curvature that focuses light toward a single point. N-bK7 is an excellent optical grade glass material prevalent for uses in the visible and NIR spectrum. Shalom EO offers Stocked N-BK7 Biconvex Lenses
