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Optical constants of OHARA - FPM (Fluorophosphate, medium-index)
S-FPM2
Wavelength:
µm
(0.3 – 2.4)
Complex refractive index (n+ik)
n
k
LogX
LogY
eV
Derived optical constants
Dispersion formula
$$n^2-1=\frac{0.761242785λ^2}{λ^2-0.00321174095}+\frac{0.747033375λ^2}{λ^2-0.0140234423}+\frac{0.938928947λ^2}{λ^2-139.52353}$$Conditions & Spec sheet
n_absolute: false
wavelength_vacuum: false
temperature: 25.0 °C
thermal_dispersion:
- type: "Schott formula"
coefficients: -1.65e-05 2.94e-09 -1.11e-12 4.25e-07 3.23e-10 0.176
nd: 1.595220
Vd: 67.735723
density: 4.17 g/cm3
thermal_expansion:
- temperature_range: -30 70 °C
coefficient: 1.17e-05 K-1
dPgF: 0.0123
climatic_resistance: 2.0
acid_resistance: 51.3
phosphate_resistance: 4.1
Comments
Recommended - The unique relative partial dispersion
References
OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp)
See also OHARA glass data sheets