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Features
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
Specifications:
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# φ(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