Input Parameters
Fitting Data0 points
Bulk Paste
Fit: n = A + B / λ² + C / λ⁴
Input wavelength is in nm and converted internally to μm for numerical stability. The full fitted formula is shown below.
Input wavelength is in nm and converted internally to μm for numerical stability. The full fitted formula is shown below.
Formula
Cauchy
λ (nm)
0.000
n
0.00000
Selected Curve
None
Fit Results
Wheel: zoom | Drag: box zoom | Right-click: reset | Track curve
Index Calculation
Calculate to show the refractive index for each group.
Notes
1. A three-parameter Cauchy fit requires at least 3 wavelength/index data points.
2. With 3 points, the curve passes exactly through all points and R² is typically 1; additional points use least-squares fitting.
3. Abbe number uses F = 486.1327 nm, d = 587.5618 nm, and C = 656.2725 nm.
4. Move to read coordinates; click to select a curve; wheel to zoom; right-click to reset.
2. With 3 points, the curve passes exactly through all points and R² is typically 1; additional points use least-squares fitting.
3. Abbe number uses F = 486.1327 nm, d = 587.5618 nm, and C = 656.2725 nm.
4. Move to read coordinates; click to select a curve; wheel to zoom; right-click to reset.