Specifications:
| Type | Bi-Convex Lenses | Material | BK7, UVFS, CaF2, BaF2, Sapphire, ZnSe ect. |
| Clear Aperture | >90% | Diameter Tolerance | +0.0/-0.1mm |
| Thickness Tolerance | ±0.1mm | Surface Irregularity | λ/4 @ 633 nm (λ/8 optional) |
| Concentricity | 2 arcmin | Paraxial Focal Length | ±2% |
Biconvex lens are the simple lenses which comprises of two convex surfaces in spherical form, generally having the same kind of radius of curvature. And they are recommended for virtual imaging of real objects, and for positive conjugate ratios from 0.2 up to 5 comparing with plano-convex lenses. Due to the equal radius of both side, biconvex lenses have shorter focal lengths.
Biconvex lenses have a broad range of applications including focusing and control of laser beams, moderate quality imaging and other optical instruments.
