Plano-concave lens has a negative focal length, diverges collimated incident light, and forms only virtual images which are seen through the lens. It is often used to expand light beams or increase focal lengths in existing systems.
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.
Plano-concave lens has a negative focal length, diverges collimated incident light, and forms only virtual images which are seen through the lens. It is often used to expand light beams or increase focal lengths in existing systems.
![](\"/userimg/10751/Plano-concave-lens-1.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 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 CaF2, Si, Ge, ZnSe… are available upon request.
