How to calculate the focal length of multiple wavelengths of light thru a simple lens, knowing the radii of both surfaces.

Question

unklerhaukus · Answer

is your lens a parabola?

unklerhaukus · Answer

*parabolic

anonymous · Answer

unfortunately it is not. An elipsoid

anonymous · Answer

But I could go with a parabola.

unklerhaukus · Answer

there are two formulas on this page that might help http://en.wikipedia.org/wiki/Lens_(optics)

anonymous · Answer

I find it weird that equations ofSnell's law are not wavelength dependant. This answers my question. Thanks.

unklerhaukus · Answer

Chromatic aberration?

anonymous · Answer

yes

anonymous · Answer

I am aware there are multiple types of abberations but as I come to understand all are treated differently. I am interested only by the theoretical abberations that are produced inside the medium.

vincent-lyon.fr · Answer

You need to know the type of glass and Cauchy's coefficients for that glass. There are six examples in the Wikipedia page. http://en.wikipedia.org/wiki/Cauchy%27s_equation

anonymous · Answer

Exactly.Thank you very much gentlemen.

vincent-lyon.fr · Answer

Snell's law depends on λ via the refractive index.