Meniscus cylindrical lenses These ophthalmic 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 a conventional cylindrical lens.
Knight Optical > Lenses > Meniscus cylindrical lenses Circular-positive type This is the section containing Circular-positive type. Circular-negative type This is the section containing Circular-negative type. Only UK and EU customers are charged VAT at 17.5%, customers outside the EU and EU customers based outside the UK who have a valid EU VAT number will not be charged VAT Knight Optical > Lenses > Meniscus cylindrical lenses
Specification   Material: B270  Material Data: (see materials section)  Back vertex power: (=1/Back FL) ± 0.06D (< 4D) ± 0.12D (> 4D)  Diameter: +0.0 / -0.25mm (25mm) ± 1mm (60mm)  Surface Quality: 60-40
Specific requirements We can manufacture Meniscus Cylindrical Lenses to any size at short notice, so if your requirements are not listed please contact us by telephone/ fax or email: stockrequirement@knightoptical.co.uk Options available   · Mounting (25mm only)   · AR Coating   · Stock lenses can be edged to smaller diameters

ETQUOTEVAR:FOOTERTEXT