Optical constants

Refractive index of N-SF4 (SCHOTT)

N-SF4: 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
1.75513
Extinction coefficient k
3.51207e-08
Permittivity ε1
3.08047
Permittivity ε2
1.23282e-07
Absorption coefficient α
0.00751089 cm⁻¹
Penetration depth δ = λ/(2πk)
2.66280e+09 nm
Abbe number Vd
27.377
Chromatic dispersion dn/dλ
-0.138312 µm⁻¹
Group index ng
1.8364
Group velocity dispersion
282.772 fs²/mm
Dispersion parameter D
-1542.67 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

# N-SF4 (SCHOTT): N-SF4
schott_n_sf4 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SF4", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_sf4.range_nm)  # (365, 2500) nm
eps = schott_n_sf4.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=1.67780282λ2λ2−0.012679345+0.282849893λ2λ2−0.0602038419+1.63539276λ2λ2−145.760496

Valid from 0.365 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.67780282
C30.012679345
C40.282849893
C50.0602038419
C61.63539276
C7145.760496

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -4.88e-06 6.57e-09 -2.72e-11 9.67e-07 1.48e-09 0.282
nd
1.75513
Vd
27.38
glass code
755274.315
glass status
standard
density
value: 3145
thermal expansion
value: 9.45e-06, temperature range: 243 343; value: 1.087e-05, temperature range: 293 573
dPgF
0.0118
resistance
acid: 1.3; stain: 0.0; alkali: 1.0; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -1.10e-06 K⁻¹ at 633 nm, dn/dT = -2.45e-06 K⁻¹ at 1310 nm, dn/dT = -2.53e-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
N-SF4 (SCHOTT), N-SF4: n and k versus wavelength
λ (µm)nk
0.3651.8354386.749200e-06
0.3667641.8338215.811225e-06
0.3685371.8322354.868716e-06
0.371.8309554.091200e-06
0.3703191.830684.016093e-06
0.3721091.8291553.594530e-06
0.3739081.827663.170930e-06
0.3757151.8261932.745282e-06
0.3775321.8247532.317577e-06
0.3793571.8233411.887804e-06
0.381.8228511.736300e-06
0.381191.8219541.640865e-06
0.3830331.8205931.493145e-06
0.3848851.8192571.344710e-06
0.3867451.8179441.195558e-06
0.3886151.8166551.045685e-06
0.391.8157189.346500e-07
0.3904941.8153889.177563e-07
0.3923811.8141448.531374e-07
0.3942781.8129217.882061e-07
0.3961841.8117197.229610e-07
0.3980991.8105376.574005e-07
0.41.809395.923300e-07
0.4000241.8093765.918192e-07
0.4019571.8082345.499149e-07
0.40391.8071115.078081e-07
0.4051.8064864.839800e-07
0.4058531.8060064.732335e-07
0.4078151.804924.485133e-07
0.4097861.8038514.236736e-07
0.4117671.80283.987138e-07
0.4137581.8017653.736333e-07
0.4157581.8007463.484316e-07
0.4177681.7997443.231081e-07
0.4197871.7987582.976621e-07
0.421.7986552.949800e-07
0.4218161.7977872.850715e-07
0.4238561.796832.739482e-07
0.4259041.7958892.627712e-07
0.4279631.7949622.515401e-07
0.4300321.7940492.402548e-07
0.4321111.7931492.289149e-07
0.43421.7922632.175202e-07
0.4361.7915142.077000e-07
0.4362991.7913912.069138e-07
0.4384081.7905312.013634e-07
0.4405271.7896841.957861e-07
0.4426571.7888491.901819e-07
0.4447971.7880261.845505e-07
0.4469471.7872151.788920e-07
0.4491071.7864161.732061e-07
0.4512781.7856281.674927e-07
0.453461.7848521.617517e-07
0.4556521.7840861.559829e-07
0.4578551.7833311.501862e-07
0.461.782611.445400e-07
0.4600681.7825871.444391e-07
0.4622921.7818531.411281e-07
0.4645271.7811291.378011e-07
0.4667721.7804151.344580e-07
0.4690291.7797111.310988e-07
0.4712961.7790161.277233e-07
0.4735741.7783311.243315e-07
0.4758631.7776551.209233e-07
0.4781641.7769881.174987e-07
0.4804751.776331.140575e-07
0.4827981.7756811.105996e-07
0.4851321.775041.071250e-07
0.4874771.7744081.036337e-07
0.4898331.7737841.001254e-07
0.4922011.7731689.660025e-08
0.4945811.772569.305801e-08
0.4969721.771968.949864e-08
0.4993741.7713688.592208e-08
0.51.7712158.499000e-08
0.5017881.7707838.325843e-08
0.5042141.7702068.090921e-08
0.5066511.7696367.854863e-08
0.50911.7690737.617665e-08
0.5115611.7685187.379320e-08
0.5140341.7679697.139822e-08
0.5165191.7674276.899167e-08
0.5190161.7668926.657349e-08
0.5215251.7663636.414361e-08
0.5240461.7658426.170199e-08
0.5265791.7653265.924857e-08
0.5291251.7648175.678328e-08
0.5316831.7643145.430608e-08
0.5342531.7638175.181690e-08
0.5368351.7633264.931569e-08
0.5394311.7628414.680239e-08
0.5420381.7623614.427694e-08
0.5446581.7618884.173929e-08
0.5461.7616494.044000e-08
0.5472911.761424.017771e-08
0.5499371.7609583.964033e-08
0.5525951.7605013.910035e-08
0.5552671.760053.855777e-08
0.5579511.7596033.801256e-08
0.5606481.7591623.746471e-08
0.5633581.7587273.691422e-08
0.5660821.7582963.636107e-08
0.5688181.757873.580524e-08
0.5715681.7574493.524673e-08
0.5743311.7570333.468551e-08
0.5771071.7566223.412158e-08
0.5798971.7562153.355493e-08
0.581.75623.353400e-08
0.58271.7558133.409774e-08
0.5855171.7554163.468582e-08
0.5883471.7550233.527674e-08
0.5911921.7546343.587052e-08
0.5940491.754253.646717e-08
0.5969211.753873.706671e-08
0.5998071.7534943.766914e-08
0.6027061.7531233.827449e-08
0.605621.7527553.888276e-08
0.6085471.7523923.949397e-08
0.6114891.7520324.010814e-08
0.6144451.7516774.072527e-08
0.6174151.7513254.134539e-08
0.621.7510244.188500e-08
0.62041.7509774.193350e-08
0.6233991.7506334.229713e-08
0.6264131.7502934.266253e-08
0.6294411.7499564.302969e-08
0.6324831.7496234.339862e-08
0.6355411.7492934.376934e-08
0.6386131.7489674.414185e-08
0.64171.7486454.451616e-08
0.6448021.7483254.489228e-08
0.6479191.748014.527022e-08
0.6510511.7476974.564999e-08
0.6541991.7473884.603159e-08
0.6573611.7470824.641504e-08
0.661.746834.673500e-08
0.6605391.7467794.658956e-08
0.6637321.7464794.572774e-08
0.666941.7461824.486176e-08
0.6701651.7458884.399159e-08
0.6734041.7455984.311722e-08
0.6766591.745314.223862e-08
0.679931.7450254.135577e-08
0.6832171.7447434.046865e-08
0.686521.7444643.957725e-08
0.6898391.7441873.868153e-08
0.6931731.7439143.778149e-08
0.6965241.7436433.687709e-08
0.6998911.7433753.596833e-08
0.71.7433663.593900e-08
0.7032751.7431093.564280e-08
0.7066741.7428463.533528e-08
0.710091.7425863.502628e-08
0.7135231.7423283.471579e-08
0.7169721.7420723.440380e-08
0.7204381.7418193.409030e-08
0.7239211.7415693.377528e-08
0.727421.7413213.345874e-08
0.7309371.7410753.314067e-08
0.734471.7408323.282106e-08
0.7380211.7405913.249991e-08
0.7415881.7403523.217720e-08
0.7451731.7401153.185293e-08
0.7487751.7398813.152710e-08
0.7523951.7396493.119969e-08
0.7560321.7394183.087070e-08
0.7596871.739193.054012e-08
0.7633591.7389653.020794e-08
0.7670491.7387412.987416e-08
0.7707571.7385192.953876e-08
0.7744831.7382992.920174e-08
0.7782271.7380812.886309e-08
0.7819891.7378652.852280e-08
0.7857691.7376512.818087e-08
0.7895681.7374392.783729e-08
0.7933851.7372292.749204e-08
0.797221.7370212.714513e-08
0.8010741.7368142.679654e-08
0.8049461.7366092.644626e-08
0.8088371.7364062.609429e-08
0.8127471.7362052.574062e-08
0.8166761.7360052.538524e-08
0.8206241.7358072.502814e-08
0.8245911.7356112.466932e-08
0.8285771.7354172.430876e-08
0.8325831.7352242.394646e-08
0.8366071.7350322.358240e-08
0.8406521.7348422.321659e-08
0.8447151.7346542.284901e-08
0.8487991.7344672.247965e-08
0.8529021.7342822.210851e-08
0.8570251.7340982.173557e-08
0.8611681.7339162.136083e-08
0.8653311.7337352.098427e-08
0.8695141.7335562.060590e-08
0.8737171.7333772.022570e-08
0.8779411.7332011.984366e-08
0.8821851.7330251.945977e-08
0.8864491.7328511.907403e-08
0.8907351.7326791.868642e-08
0.895041.7325071.829694e-08
0.8993671.7323371.790558e-08
0.9037151.7321681.751232e-08
0.9080831.7320011.711717e-08
0.9124731.7318341.672010e-08
0.9168841.7316691.632111e-08
0.9213161.7315051.592020e-08
0.925771.7313421.551734e-08
0.9302451.731181.511254e-08
0.9347421.7310191.470579e-08
0.9392611.730861.429706e-08
0.9438011.7307011.388636e-08
0.9483641.7305441.347368e-08
0.9529481.7303881.305900e-08
0.9575551.7302321.264231e-08
0.9621841.7300781.222362e-08
0.9668351.7299251.180289e-08
0.9715091.7297721.138014e-08
0.9762051.7296211.095534e-08
0.9809241.729471.052848e-08
0.9856661.7293211.009957e-08
0.9904311.7291729.668576e-09
0.9952191.7290259.235502e-09
1.000031.7288788.800335e-09
1.004861.7287328.363064e-09
1.009721.7285877.923679e-09
1.01461.7284437.482170e-09
1.019511.7282997.038527e-09
1.024441.7281566.592739e-09
1.029391.7280156.144796e-09
1.034361.7278735.694688e-09
1.039361.7277335.242404e-09
1.044391.7275944.787934e-09
1.049441.7274554.331267e-09
1.054511.7273173.872392e-09
1.059611.7271793.411299e-09
1.061.7271693.375800e-09
1.064731.7270424.331960e-09
1.069881.7269065.372463e-09
1.075051.7267716.417996e-09
1.080251.7266367.468583e-09
1.085471.7265028.524249e-09
1.090711.7263689.585017e-09
1.095991.7262351.065091e-08
1.101291.7261031.172196e-08
1.106611.7259711.279819e-08
1.111961.7258391.387962e-08
1.117331.7257091.496628e-08
1.122741.7255781.605819e-08
1.128161.7254491.715538e-08
1.133621.725321.825787e-08
1.13911.7251911.936569e-08
1.14461.7250632.047887e-08
1.150141.7249352.159743e-08
1.15571.7248072.272139e-08
1.161281.724682.385079e-08
1.16691.7245542.498565e-08
1.172541.7244282.612599e-08
1.17821.7243022.727185e-08
1.18391.7241772.842325e-08
1.189621.7240522.958021e-08
1.195371.7239273.074276e-08
1.201151.7238033.191094e-08
1.206961.7236793.308476e-08
1.212791.7235553.426426e-08
1.218661.7234323.544946e-08
1.224551.7233093.664038e-08
1.230471.7231863.783707e-08
1.236421.7230633.903954e-08
1.242391.7229414.024782e-08
1.24841.7228194.146194e-08
1.254431.7226974.268193e-08
1.26051.7225754.390782e-08
1.266591.7224544.513964e-08
1.272711.7223334.637741e-08
1.278871.7222124.762116e-08
1.285051.7220914.887093e-08
1.291261.721975.012674e-08
1.29751.721855.138862e-08
1.303771.7217295.265659e-08
1.310081.7216095.393070e-08
1.316411.7214885.521097e-08
1.322771.7213685.649743e-08
1.329171.7212485.779010e-08
1.335591.7211285.908902e-08
1.342051.7210086.039423e-08
1.348541.7208886.170574e-08
1.355061.7207686.302359e-08
1.361611.7206486.434781e-08
1.368191.7205286.567844e-08
1.37481.7204086.701550e-08
1.381451.7202886.835902e-08
1.388131.7201686.970903e-08
1.394841.7200487.106557e-08
1.401581.7199287.242867e-08
1.408351.7198087.379836e-08
1.415161.7196887.517467e-08
1.4221.7195687.655763e-08
1.428881.7194477.794728e-08
1.435781.7193277.934364e-08
1.442731.7192068.074676e-08
1.44971.7190858.215665e-08
1.456711.7189648.357337e-08
1.463751.7188438.499693e-08
1.470831.7187228.642737e-08
1.477941.71868.786473e-08
1.485081.7184788.930904e-08
1.492261.7183569.076033e-08
1.499471.7182349.221863e-08
1.506721.7181129.368398e-08
1.5141.7179899.515642e-08
1.521321.7178669.663598e-08
1.528681.7177439.812268e-08
1.531.717729.839000e-08
1.536071.7176191.097739e-07
1.543491.7174951.237057e-07
1.550951.7173711.377049e-07
1.558451.7172461.517718e-07
1.565991.7171221.659067e-07
1.573561.7169961.801099e-07
1.581161.7168711.943818e-07
1.588811.7167452.087226e-07
1.596491.7166182.231328e-07
1.60421.7164912.376127e-07
1.611961.7163642.521625e-07
1.619751.7162372.667827e-07
1.627581.7161092.814735e-07
1.635451.715982.962354e-07
1.643351.7158513.110686e-07
1.65131.7157213.259736e-07
1.659281.7155913.409505e-07
1.66731.7154613.559999e-07
1.675361.715333.711221e-07
1.683461.7151983.863173e-07
1.69161.7150664.015860e-07
1.699781.7149334.169285e-07
1.707991.71484.323451e-07
1.716251.7146664.478363e-07
1.724551.7145314.634024e-07
1.732881.7143964.790437e-07
1.741261.714264.947607e-07
1.749681.7141245.105536e-07
1.758131.7139875.264228e-07
1.766631.7138495.423688e-07
1.775171.713715.583919e-07
1.783761.7135715.744924e-07
1.792381.7134315.906707e-07
1.801041.713296.069273e-07
1.809751.7131496.232624e-07
1.81851.7130066.396765e-07
1.827291.7128636.561700e-07
1.836121.712726.727431e-07
1.8451.7125756.893964e-07
1.853921.7124297.061302e-07
1.862881.7122837.229449e-07
1.871881.7121367.398409e-07
1.880931.7119887.568185e-07
1.890021.7118397.738783e-07
1.899161.7116897.910204e-07
1.908341.7115388.082455e-07
1.917571.7113868.255538e-07
1.926841.7112348.429458e-07
1.936151.711088.604219e-07
1.945511.7109258.779824e-07
1.954921.7107698.956279e-07
1.964371.7106139.133586e-07
1.971.7105199.239300e-07
1.973861.7104559.547335e-07
1.98341.7102961.030849e-06
1.992991.7101361.107333e-06
2.002631.7099751.184187e-06
2.012311.7098131.261412e-06
2.022031.709651.339010e-06
2.031811.7094851.416983e-06
2.041631.709321.495334e-06
2.05151.7091531.574063e-06
2.061421.7089851.653173e-06
2.071381.7088161.732665e-06
2.08141.7086451.812541e-06
2.091461.7084741.892804e-06
2.101571.7083011.973454e-06
2.111731.7081262.054495e-06
2.121931.7079512.135927e-06
2.132191.7077742.217753e-06
2.14251.7075962.299974e-06
2.152861.7074162.382593e-06
2.163261.7072352.465611e-06
2.173721.7070522.549030e-06
2.184231.7068682.632853e-06
2.194791.7066832.717081e-06
2.20541.7064962.801716e-06
2.216061.7063082.886761e-06
2.226771.7061182.972216e-06
2.237541.7059263.058085e-06
2.248351.7057333.144368e-06
2.259221.7055393.231069e-06
2.270141.7053433.318189e-06
2.281121.7051453.405730e-06
2.292141.7049453.493694e-06
2.303221.7047443.582083e-06
2.314361.7045413.670900e-06
2.3251.7043473.755800e-06
2.325541.7043373.759836e-06
2.336791.704133.843115e-06
2.348081.7039223.926797e-06
2.359431.7037124.010884e-06
2.370841.7035014.095378e-06
2.38231.7032874.180279e-06
2.393821.7030714.265591e-06
2.405391.7028544.351316e-06
2.417021.7026354.437455e-06
2.42871.7024144.524010e-06
2.440441.702194.610984e-06
2.452241.7019654.698378e-06
2.464091.7017384.786195e-06
2.4761.7015094.874436e-06
2.487971.7012774.963104e-06
2.51.7010445.052200e-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
—