These lenses may be used to increase the numerical aperture of a positive lens assembly, without an undue increase in the aberrations.
The center thickness of positive meniscus lens is bigger than edge thickness.
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 S/D |
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.
These lenses may be used to increase the numerical aperture of a positive lens assembly, without an undue increase in the aberrations.
The center thickness of positive meniscus lens is bigger than edge thickness.
![](\"/userimg/10751/Positive-meniscus-lens1.jpg\"/)
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 S/D |
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 CaF2, Si, Ge, ZnSe… are available upon request.
