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## Optical constants of OHARA - FSL (Fluorosilicate, low-index)

S-FSL5

Wavelength:
µm

(0.28 – 2.4)

### Complex refractive index (*n+ik)*

n
k
LogX
LogY
eV

### Derived optical constants

### Dispersion formula

$$n^2-1=\frac{1.17447043λ^2}{λ^2-0.00841855181}+\frac{0.0140056154λ^2}{λ^2+0.0581790767}+\frac{1.19272435λ^2}{λ^2-129.599726}$$### Conditions & Spec sheet

n_absolute: false wavelength_vacuum: false temperature: 25.0 °C thermal_dispersion: - type: "Schott formula" coefficients: -6.61e-06 1.85e-08 -1.39e-11 4.98e-07 1.07e-09 0.0 nd: 1.487490 Vd: 70.236252 glass_code: 487702 density: 2.46 g/cm^{3}thermal_expansion: - temperature_range: -30 70 °C coefficient: 9e-06 K^{-1}- temperature_range: 20 300 °C coefficient: 9.5e-06 K^{-1}dPgF: 0.0022 climatic_resistance: 1.0 acid_resistance: 3.0 phosphate_resistance: 2.0

### Comments

Recommended

### References

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)

See also OHARA glass data sheets