Focal Length Calculator

Notes:

• Please use the American standard for number formatting rather than the European standard (i.e. for "two and a half," enter "2.5" rather than "2,5").
• This calculator follows the standard sign convention for the optical radius of curvature where if the vertex of a surface lies to the left of the center of curvature the radius of curvature is positive, and if the vertex lies to the right of the center of curvature the radius of curvature is negative. In the figure, R₁ is positive and R₂ is negative.

Description

Relate optical and mechanical parameters of simple lenses in order to ease integration into application assemblies. Select index from list of Edmund Optics' own optical substrates to help calculate focal lengths and principal points of any standard lens.