Optical constants

Refractive index of SF6 (SCHOTT)

SF6: n,k 0.365–2.5 µm

Data
formula 2 + tabulated k
Range
0.365–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.365–2.5 µm
Refractive index n
1.80518
Extinction coefficient k
7.12205e-09
Permittivity ε1
3.25866
Permittivity ε2
2.57131e-08
Absorption coefficient α
0.00152312 cm⁻¹
Penetration depth δ = λ/(2πk)
1.31310e+10 nm
Abbe number Vd
25.432
Chromatic dispersion dn/dλ
-0.158615 µm⁻¹
Group index ng
1.89838
Group velocity dispersion
327.678 fs²/mm
Dispersion parameter D
-1787.66 ps/(nm·km)
Photon energy
2.11001 eV

ε = (n + ik)², α = 4πk/λ, ng = n − λ dn/dλ, GVD = λ³/(2πc²) d²n/dλ², D = −(λ/c) d²n/dλ². Group-velocity dispersion is given for formula data only.

Use it in Lightsmith

Load this data in Python, simulate in one more line

pip install lightsmith
import lightsmith as ls

# SF6 (SCHOTT): SF6
schott_sf6 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "SF6", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_sf6.range_nm)  # (365, 2500) nm
eps = schott_sf6.eps([633])  # complex permittivity

Downloads the original record once (pinned to the imported snapshot) and caches it.

Lightsmith is open source (MIT): Mie, T-matrix, BEM, DDA, FDTD, RCWA, TMM, mode solvers and inverse design behind one spec, on CPU or GPU. GitHub.

Dispersion formula

Sellmeier (C in µm²) (formula 2), λ in µm
n2−1=1.72448482λ2λ2−0.0134871947+0.390104889λ2λ2−0.0569318095+1.04572858λ2λ2−118.557185

Valid from 0.365 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.72448482
C30.0134871947
C40.390104889
C50.0569318095
C61.04572858
C7118.557185

Comments and conditions

lead containing glass type

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 6.69e-06 1.78e-08 -3.36e-11 1.77e-06 1.7e-09 0.269
nd
1.80518
Vd
25.43
glass code
805254.518
glass status
standard
density
value: 5180
thermal expansion
value: 8.1e-06, temperature range: 243 343; value: 9e-06, temperature range: 293 573
dPgF
0.0092
resistance
acid: 51.3; stain: 3.0; alkali: 2.3; climatic: 2.0; phosphate: 3.3

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 7.51e-06 K⁻¹ at 633 nm, dn/dT = 4.67e-06 K⁻¹ at 1310 nm, dn/dT = 4.46e-06 K⁻¹ at 1550 nm

References

Cite

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com); See also SCHOTT glass data sheets; Data from the refractiveindex.info database (M. N. Polyanskiy, Sci. Data 11, 94 (2024), doi:10.1038/s41597-023-02898-2)

Data

Computed on 418 wavelengths, the same grid as the API and the library
SF6 (SCHOTT), SF6: n and k versus wavelength
λ (µm)nk
0.3651.8970414.074000e-06
0.3667641.8952143.484290e-06
0.3685371.8934222.891729e-06
0.371.8919752.402900e-06
0.3703191.8916632.357934e-06
0.3721091.8899372.105548e-06
0.3739081.8882441.851942e-06
0.3757151.8865811.597110e-06
0.3775321.8849481.341046e-06
0.3793571.8833451.083744e-06
0.381.8827889.930400e-07
0.381191.881779.362278e-07
0.3830331.8802238.482903e-07
0.3848851.8787047.599278e-07
0.3867451.877216.711380e-07
0.3886151.8757435.819191e-07
0.391.8746765.158200e-07
0.3904941.87435.043854e-07
0.3923811.8728824.606480e-07
0.3942781.8714884.166992e-07
0.3961841.8701173.725379e-07
0.3980991.8687693.281631e-07
0.41.867462.841200e-07
0.4000241.8674442.838402e-07
0.4019571.866142.608866e-07
0.40391.8648572.378221e-07
0.4051.8641422.247700e-07
0.4058531.8635942.183278e-07
0.4078151.8623522.035088e-07
0.4097861.861131.886181e-07
0.4117671.8599271.736554e-07
0.4137581.8587431.586204e-07
0.4157581.8575771.435127e-07
0.4177681.856431.283320e-07
0.4197871.85531.130779e-07
0.421.8551821.114700e-07
0.4218161.8541871.060697e-07
0.4238561.8530911.000073e-07
0.4259041.8520129.391568e-08
0.4279631.8509498.779458e-08
0.4300321.8499028.164389e-08
0.4321111.848877.546347e-08
0.43421.8478546.925317e-08
0.4361.8469946.390100e-08
0.4362991.8468536.351105e-08
0.4384081.8458666.075797e-08
0.4405271.8448935.799159e-08
0.4426571.8439355.521182e-08
0.4447971.842995.241863e-08
0.4469471.8420594.961193e-08
0.4491071.8411414.679166e-08
0.4512781.8402364.395775e-08
0.453461.8393444.111015e-08
0.4556521.8384643.824879e-08
0.4578551.8375973.537359e-08
0.461.8367673.257300e-08
0.4600681.8367413.254218e-08
0.4622921.8358983.153114e-08
0.4645271.8350653.051523e-08
0.4667721.8342452.949440e-08
0.4690291.8334352.846863e-08
0.4712961.8326362.743791e-08
0.4735741.8318492.640220e-08
0.4758631.8310712.536149e-08
0.4781641.8303042.431575e-08
0.4804751.8295482.326495e-08
0.4827981.8288012.220907e-08
0.4851321.8280642.114809e-08
0.4874771.8273372.008198e-08
0.4898331.8266191.901071e-08
0.4922011.8259111.793427e-08
0.4945811.8252121.685262e-08
0.4969721.8245221.576575e-08
0.4993741.823841.467362e-08
0.51.8236651.438900e-08
0.5017881.8231681.410047e-08
0.5042141.8225041.370903e-08
0.5066511.8218481.331570e-08
0.50911.8212011.292046e-08
0.5115611.8205621.252332e-08
0.5140341.8199311.212425e-08
0.5165191.8193081.172326e-08
0.5190161.8186921.132032e-08
0.5215251.8180851.091544e-08
0.5240461.8174841.050861e-08
0.5265791.8168921.009980e-08
0.5291251.8163069.689020e-09
0.5316831.8157289.276253e-09
0.5342531.8151578.861491e-09
0.5368351.8145928.444724e-09
0.5394311.8140358.025942e-09
0.5420381.8134847.605136e-09
0.5446581.812947.182295e-09
0.5461.8126656.965800e-09
0.5472911.8124026.954121e-09
0.5499371.8118716.930193e-09
0.5525951.8113466.906150e-09
0.5552671.8108286.881991e-09
0.5579511.8103156.857715e-09
0.5606481.8098096.833321e-09
0.5633581.8093086.808809e-09
0.5660821.8088146.784179e-09
0.5688181.8083256.759430e-09
0.5715681.8078426.734562e-09
0.5743311.8073646.709573e-09
0.5771071.8068926.684463e-09
0.5798971.8064256.659232e-09
0.581.8064086.658300e-09
0.58271.8059646.823067e-09
0.5855171.8055086.994949e-09
0.5883471.8050587.167662e-09
0.5911921.8046127.341210e-09
0.5940491.8041727.515597e-09
0.5969211.8037367.690827e-09
0.5998071.8033067.866904e-09
0.6027061.802888.043832e-09
0.605621.8024598.221615e-09
0.6085471.8020438.400258e-09
0.6114891.8016318.579764e-09
0.6144451.8012248.760139e-09
0.6174151.8008228.941385e-09
0.621.8004769.099100e-09
0.62041.8004249.102860e-09
0.6233991.800039.131051e-09
0.6264131.7996419.159378e-09
0.6294411.7992559.187843e-09
0.6324831.7988759.216445e-09
0.6355411.7984989.245185e-09
0.6386131.7981259.274064e-09
0.64171.7977579.303083e-09
0.6448021.7973929.332242e-09
0.6479191.7970319.361542e-09
0.6510511.7966759.390984e-09
0.6541991.7963229.420568e-09
0.6573611.7959729.450295e-09
0.661.7956859.475100e-09
0.6605391.7956279.452699e-09
0.6637321.7952859.319963e-09
0.666941.7949479.186584e-09
0.6701651.7946129.052561e-09
0.6734041.7942818.917889e-09
0.6766591.7939538.782567e-09
0.679931.7936298.646591e-09
0.6832171.7933088.509957e-09
0.686521.7929918.372663e-09
0.6898391.7926768.234705e-09
0.6931731.7923658.096080e-09
0.6965241.7920577.956785e-09
0.6998911.7917537.816817e-09
0.71.7917437.812300e-09
0.7032751.7914517.771944e-09
0.7066741.7911537.730048e-09
0.710091.7908577.687949e-09
0.7135231.7905657.645647e-09
0.7169721.7902757.603140e-09
0.7204381.7899897.560427e-09
0.7239211.7897057.517509e-09
0.727421.7894247.474382e-09
0.7309371.7891467.431047e-09
0.734471.7888717.387503e-09
0.7380211.7885987.343748e-09
0.7415881.7883287.299782e-09
0.7451731.7880617.255603e-09
0.7487751.7877977.211211e-09
0.7523951.7875357.166604e-09
0.7560321.7872757.121781e-09
0.7596871.7870187.076742e-09
0.7633591.7867647.031485e-09
0.7670491.7865126.986009e-09
0.7707571.7862626.940313e-09
0.7744831.7860156.894397e-09
0.7782271.785776.848258e-09
0.7819891.7855276.801897e-09
0.7857691.7852876.755311e-09
0.7895681.7850496.708500e-09
0.7933851.7848136.661463e-09
0.797221.784586.614199e-09
0.8010741.7843486.566706e-09
0.8049461.7841196.518983e-09
0.8088371.7838926.471030e-09
0.8127471.7836676.422845e-09
0.8166761.7834446.374427e-09
0.8206241.7832236.325775e-09
0.8245911.7830046.276888e-09
0.8285771.7827876.227764e-09
0.8325831.7825726.178403e-09
0.8366071.7823596.128803e-09
0.8406521.7821486.078964e-09
0.8447151.7819396.028884e-09
0.8487991.7817315.978561e-09
0.8529021.7815265.927995e-09
0.8570251.7813225.877185e-09
0.8611681.781125.826130e-09
0.8653311.780925.774827e-09
0.8695141.7807215.723276e-09
0.8737171.7805245.671477e-09
0.8779411.7803295.619426e-09
0.8821851.7801365.567125e-09
0.8864491.7799445.514570e-09
0.8907351.7797535.461761e-09
0.895041.7795655.408697e-09
0.8993671.7793785.355377e-09
0.9037151.7791925.301799e-09
0.9080831.7790085.247961e-09
0.9124731.7788265.193864e-09
0.9168841.7786455.139505e-09
0.9213161.7784655.084883e-09
0.925771.7782875.029997e-09
0.9302451.778114.974846e-09
0.9347421.7779354.919429e-09
0.9392611.7777614.863743e-09
0.9438011.7775894.807788e-09
0.9483641.7774174.751563e-09
0.9529481.7772474.695066e-09
0.9575551.7770794.638295e-09
0.9621841.7769124.581251e-09
0.9668351.7767464.523930e-09
0.9715091.7765814.466333e-09
0.9762051.7764174.408457e-09
0.9809241.7762554.350301e-09
0.9856661.7760944.291864e-09
0.9904311.7759344.233145e-09
0.9952191.7757754.174142e-09
1.000031.7756174.114854e-09
1.004861.7754614.055279e-09
1.009721.7753063.995416e-09
1.01461.7751513.935263e-09
1.019511.7749983.874820e-09
1.024441.7748463.814085e-09
1.029391.7746953.753056e-09
1.034361.7745443.691732e-09
1.039361.7743953.630111e-09
1.044391.7742473.568193e-09
1.049441.77413.505975e-09
1.054511.7739543.443457e-09
1.059611.7738083.380636e-09
1.061.7737973.375800e-09
1.064731.7736643.784917e-09
1.069881.7735214.230122e-09
1.075051.7733784.677479e-09
1.080251.7732365.126999e-09
1.085471.7730965.578692e-09
1.090711.7729566.032569e-09
1.095991.7728176.488639e-09
1.101291.7726786.946915e-09
1.106611.7725417.407405e-09
1.111961.7724047.870122e-09
1.117331.7722688.335075e-09
1.122741.7721338.802276e-09
1.128161.7719989.271736e-09
1.133621.7718659.743465e-09
1.13911.7717321.021747e-08
1.14461.77161.069377e-08
1.150141.7714681.117238e-08
1.15571.7713371.165329e-08
1.161281.7712071.213654e-08
1.16691.7710771.262211e-08
1.172541.7709481.311004e-08
1.17821.770821.360032e-08
1.18391.7706921.409298e-08
1.189621.7705651.458801e-08
1.195371.7704381.508544e-08
1.201151.7703121.558527e-08
1.206961.7701871.608752e-08
1.212791.7700621.659220e-08
1.218661.7699381.709932e-08
1.224551.7698141.760888e-08
1.230471.769691.812091e-08
1.236421.7695681.863542e-08
1.242391.7694451.915241e-08
1.24841.7693231.967191e-08
1.254431.7692022.019391e-08
1.26051.7690812.071844e-08
1.266591.768962.124550e-08
1.272711.768842.177511e-08
1.278871.768722.230728e-08
1.285051.7686012.284203e-08
1.291261.7684822.337936e-08
1.29751.7683632.391928e-08
1.303771.7682452.446182e-08
1.310081.7681272.500698e-08
1.316411.7680092.555477e-08
1.322771.7678922.610522e-08
1.329171.7677752.665832e-08
1.335591.7676582.721410e-08
1.342051.7675412.777256e-08
1.348541.7674252.833372e-08
1.355061.7673092.889760e-08
1.361611.7671942.946420e-08
1.368191.7670783.003354e-08
1.37481.7669633.060563e-08
1.381451.7668483.118049e-08
1.388131.7667333.175813e-08
1.394841.7666183.233856e-08
1.401581.7665043.292180e-08
1.408351.7663893.350785e-08
1.415161.7662753.409674e-08
1.4221.7661613.468847e-08
1.428881.7660473.528307e-08
1.435781.7659333.588054e-08
1.442731.765823.648090e-08
1.44971.7657063.708416e-08
1.456711.7655933.769033e-08
1.463751.7654793.829944e-08
1.470831.7653663.891149e-08
1.477941.7652523.952650e-08
1.485081.7651394.014448e-08
1.492261.7650264.076545e-08
1.499471.7649124.138943e-08
1.506721.7647994.201641e-08
1.5141.7646864.264643e-08
1.521321.7645724.327950e-08
1.528681.7644594.391562e-08
1.531.7644394.403000e-08
1.536071.7643454.969808e-08
1.543491.7642325.663482e-08
1.550951.7641186.360508e-08
1.558451.7640057.060904e-08
1.565991.7638917.764686e-08
1.573561.7637778.471870e-08
1.581161.7636639.182473e-08
1.588811.7635499.896510e-08
1.596491.7634351.061400e-07
1.60421.763321.133496e-07
1.611961.7632051.205940e-07
1.619751.7630911.278735e-07
1.627581.7629761.351881e-07
1.635451.762861.425381e-07
1.643351.7627451.499236e-07
1.65131.7626291.573449e-07
1.659281.7625141.648020e-07
1.66731.7623971.722951e-07
1.675361.7622811.798245e-07
1.683461.7621641.873903e-07
1.69161.7620471.949926e-07
1.699781.761932.026317e-07
1.707991.7618132.103077e-07
1.716251.7616952.180209e-07
1.724551.7615762.257713e-07
1.732881.7614582.335592e-07
1.741261.7613392.413847e-07
1.749681.761222.492481e-07
1.758131.76112.571494e-07
1.766631.760982.650890e-07
1.775171.7608592.730670e-07
1.783761.7607382.810835e-07
1.792381.7606172.891387e-07
1.801041.7604952.972329e-07
1.809751.7603733.053663e-07
1.81851.760253.135389e-07
1.827291.7601273.217511e-07
1.836121.7600033.300030e-07
1.8451.7598793.382947e-07
1.853921.7597543.466265e-07
1.862881.7596283.549986e-07
1.871881.7595023.634112e-07
1.880931.7593763.718645e-07
1.890021.7592493.803586e-07
1.899161.7591213.888937e-07
1.908341.7589933.974702e-07
1.917571.7588644.060881e-07
1.926841.7587344.147476e-07
1.936151.7586044.234490e-07
1.945511.7584734.321925e-07
1.954921.7583414.409782e-07
1.964371.7582094.498065e-07
1.971.758134.550700e-07
1.973861.7580764.690957e-07
1.98341.7579425.037534e-07
1.992991.7578085.385786e-07
2.002631.7576735.735722e-07
2.012311.7575376.087349e-07
2.022031.75746.440676e-07
2.031811.7572626.795711e-07
2.041631.7571247.152462e-07
2.05151.7569857.510938e-07
2.061421.7568447.871147e-07
2.071381.7567038.233097e-07
2.08141.7565628.596796e-07
2.091461.7564198.962254e-07
2.101571.7562759.329479e-07
2.111731.7561319.698478e-07
2.121931.7559851.006926e-06
2.132191.7558391.044184e-06
2.14251.7556911.081621e-06
2.152861.7555431.119240e-06
2.163261.7553931.157041e-06
2.173721.7552431.195024e-06
2.184231.7550911.233191e-06
2.194791.7549381.271542e-06
2.20541.7547851.310079e-06
2.216061.754631.348802e-06
2.226771.7544741.387712e-06
2.237541.7543171.426811e-06
2.248351.7541591.466098e-06
2.259221.7539991.505575e-06
2.270141.7538391.545243e-06
2.281121.7536771.585103e-06
2.292141.7535141.625156e-06
2.303221.753351.665402e-06
2.314361.7531841.705842e-06
2.3251.7530251.744500e-06
2.325541.7530171.746528e-06
2.336791.7528491.788387e-06
2.348081.7526791.830447e-06
2.359431.7525091.872711e-06
2.370841.7523361.915179e-06
2.38231.7521631.957853e-06
2.393821.7519882.000733e-06
2.405391.7518112.043820e-06
2.417021.7516332.087115e-06
2.42871.7514542.130620e-06
2.440441.7512732.174335e-06
2.452241.7510912.218261e-06
2.464091.7509072.262400e-06
2.4761.7507212.306752e-06
2.487971.7505342.351318e-06
2.51.7503462.396100e-06

Optical transmission calculator

Free-standing sample in vacuum, normal incidence
Method
Transmittance T
—
Reflectance R
—

Fresnel reflection calculator

Direction
Rp
—
Rs
—
R = (Rp+Rs)/2
—
Phase φp
—
Phase φs
—
Brewster angle θB
—
Critical angle θC
—