Write the name of the material, choose the respective category and enter the refractive indices at the wavelengths of the Fraunhofer D, F and C spectral lines (589.294 nm, 486.134 nm and 656.281 nm respectively) in the respective fields.
Evaluate these indices on refractiveindex.info or other realiable sources.
Press Calculate button to start the calculation.
Press Store(*) button to add the new calculated values into the database.
Press Reset button to clear the form.

(*) The Store button will be enabled only to users wish help to grow this database.
If you wish contribute please contact me.
Please, send me the username chosen during registration to enable your account to save the data.