Sellmeier curve fitting
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Input parameters
Wavelength λ (nm)
Refractive index n
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Fitting data
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[Group 1] 486.1327, 1.501182 531.951, 1.497862 635, 1.492894 980, 1.485588
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Sellmeier Fit
Fitting formula：n² = A + B / (λ² - C) - D · λ²
Note: 输入单位为 nm，内部自动换算为 μm；Fitting results会显示完整Formula，λ 单位为 μm。
Formula
Sellmeier
Current λ (nm)
0.000
Current n
0.00000
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Fitting results
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Wavelength λ (nm)
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Click Calculate to show index n for each group.
Tips
1. Sellmeier四参数拟合At least 需要 4 个波长/折射率 data points。
2. 四参数拟合时，4 个点可约束 A/B/C/D；更多点时为最小二乘拟合。
3. 阿贝数默认使用 F=486.1327 nm、d=587.5618 nm、C=656.2725 nm。
4. 鼠标移动显示坐标和竖线；左键点击最近曲线；滚轮缩放图表；右键可Reset view。