Like Plano-convex lens, double convex lenses have positive focal lengths and form both real and virtual images. Symmetry is assured by finishing both surfaces with the same tool. Because of symmetry, aberrations including coma, distortion and lateral chromatic aberration almost exactly canceled at unit conjugate radio. Double convex lenses have shorter focal lengths than Plano-convex lenses of equal diameter and surface radius.
Specifications
Material: | N-BK7, Fused silica |
Diameter: | +0/-0.2mm |
Clear aperture: | > 90% of diameter |
Thickness: | +/-0.1mm |
Radius: | +/-0.1% |
Centration: | < 3 arc minutes |
Surface quality: | 60-40 scratch and dig |
Power: | 3 fringes |
Irregularity: | 0.5 fringe |
Coating: | with or without AR coating |
Bevel: | Protective bevel |
* Specifications are subject to the dimensions and material used. Other materials such as Ge, Si, ZnSe, ZnS, CaF2, MgF2… are available upon request.
Like Plano-convex lens, double convex lenses have positive focal lengths and form both real and virtual images. Symmetry is assured by finishing both surfaces with the same tool. Because of symmetry, aberrations including coma, distortion and lateral chromatic aberration almost exactly canceled at unit conjugate radio. Double convex lenses have shorter focal lengths than Plano-convex lenses of equal diameter and surface radius.
Specifications
Material: | N-BK7, Fused silica |
Diameter: | +0/-0.2mm |
Clear aperture: | > 90% of diameter |
Thickness: | +/-0.1mm |
Radius: | +/-0.1% |
Centration: | < 3 arc minutes |
Surface quality: | 60-40 scratch and dig |
Power: | 3 fringes |
Irregularity: | 0.5 fringe |
Coating: | with or without AR coating |
Bevel: | Protective bevel |
* Specifications are subject to the dimensions and material used. Other materials such as Ge, Si, ZnSe, ZnS, CaF2, MgF2… are available upon request.
