Double-concave lens is normally used in combination with other lenses. Typical applications include laser beam expanders, optical character readers, viewers, and projection 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.
Double-concave lens is normally used in combination with other lenses. Typical applications include laser beam expanders, optical character readers, viewers, and projection systems.
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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.
