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Lensmaker Equation Calculator

Lensmaker Equation is used to determine whether a lens will behave as a converging or diverging lens based on the curvature of its faces and the relative indices of the lens material and the surrounding medium. It is used for determining the focal length of a thin lens (thickness = 0) with radii of curvature r1 and r2.

The focal length of a lens in air can be calculated from the lensmaker's equation.

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Lensmaker Equation Calculator

Radius of Curvature of the First Surface:
Radius of Curvature of the Second Surface:
Refractive Index of Lens Material:gmol/liter
Refractive Index of Ambient Medium:kelvin
Focal Length:

  
   
  
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Lensmaker's equation:

 1/f = (n1/nm-1) * (1/r1-1/r2)

Where,

n1 -Refractive Index of Lens Material
nm -Refractive Index of Ambient Medium
r1 -Radius of Curvature of the First Surface
r2 - Radius of Curvature of the Second Surface

Basically, the Lensmaker Equation is used to make Lenses. This online calculator helps you dynamically to determine the focal length of the lens.

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