Input Parameters
Fitting Data0 points
Bulk Paste
Fit: n² = A + B / (λ² - C) - D · λ²
Input wavelength is in nm and converted internally to μm. The fitted formula uses λ in μm.
Input wavelength is in nm and converted internally to μm. The fitted formula uses λ in μm.
Formula
Sellmeier
λ (nm)
0.000
n
0.00000
Selected Curve
None
Fit Results
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Index Calculation
Calculate to show the refractive index for each group.
Notes
1. A four-parameter Sellmeier fit requires at least 4 wavelength/index data points.
2. With 4 points, A/B/C/D are fully constrained; 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 4 points, A/B/C/D are fully constrained; 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.