
Using the index fitter
How to fit refractive index data:
- Open the index fitter window (menu command Tools > Index fitter)
- Change the glass name and version using the form; enter any other form data desired.
- Click the '+' button below the data table to create wavelength, index pairs
- Modify the numbers in the table
- Choose a functional form from the menu at the bottom left
- Enter rough values for the coefficients, or press the Guess button
- Press the Fit button to perform the fit
- If the result is satisfactory, drag the glass from the drop box at the upper right of the window and drop it into the table in the Glasses window of a lens design in order to save it.
