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            福州高特光電科技有限公司

            The Positive Meniscus Lenses are a convex-concave lens, but is thicker at the center than at the edges. They are felt polished and are used universally in the ophthalmic industry where convention dictates that lens power be specified in Diopters.

             

             

             

             

            Specifications of Mensiscus Lens:

            Material: BK7
            Design Wavelength: 546.1nm, n=1.518721
            Diameter Tolerance: +0.0/-0.1mm
            Paraxial Focal Length: ±2%
            Centration: 3 arc minutes
            Surface Figure : l/4 @ 633 nm
            Surface Quality: 60/40
            Clear Aperture: >80%
            Bevel: <0.25mm X 45°
            Coating: Uncoated

            Item# F(mm) f(mm) R1 R2 Tc Te Fb
            MNP1-201 25.4 100.0 33.42 89.95 4.0 2.39 96.01
            MNP1-202 25.4 150.0 42.36 89.95 4.0 2.95 145.20
            MNP1-203 25.4 200.0 48.75 89.95 3.5 2.72 194.51
            MNP1-204 25.4 250.0 83.95 235.5 3.5 2.88 245.97
            MNP1-205 25.4 300.0 94.19 235.5 3.5 2.98 296.27
            MNP1-206 25.4 400.0 110.92 235.5 3.5 3.11 396.06
            MNP1-207 25.4 500.0 124.17 235.5 3.5 3.19 496.16
            MNP1-208 25.4 1000.0 278.34 600.00 3.5 3.30 993.7

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