30 Mar 2020 Meniscus Cylindrical Lens can increase the NA of the system while only adding slightly to the total spherical aberrations. The Negative Meniscus Lens is used to increase the focal length of another lens while maintaining the angular resolution of the optical assembly. This lens shape is best used when one conjugate is relatively far from the lens.
These economical meniscus lenses provide a wide range of longer focal lengths at low cost. The 60mm lenses have moulded edges whilst the 25mm are edged and centred. Each lens has one spherical and one toroidal surface, giving zero power in one cross-section and positive or negative power in the orthogonal section. The overall effect is that of a conventional cylindrical lens.
| Material |
Optical glass/ Fused silica/ sapphire etc. |
| Dimension |
2mm~300mm |
| Dimension tolerance |
±0.05mm~±0.1mm |
| Centre Thickness |
2mm~20mm |
| Surface quality |
60/40， 40/20， 20/10 |
| Surface accuracy |
λ/2~λ/10@632.8nm，532nm |
| Clear Aperture |
>85% dig diameter |
| Centration |
|
| Coating |
As per customer’s request |
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