Optical constants

Refractive index of SF2 (SCHOTT)

SF2: n,k 0.35–2.5 µm

Data
formula 2 + tabulated k
Range
0.35–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.35–2.5 µm
Refractive index n
1.64769
Extinction coefficient k
9.37538e-09
Permittivity ε1
2.71487
Permittivity ε2
3.08953e-08
Absorption coefficient α
0.00200501 cm⁻¹
Penetration depth δ = λ/(2πk)
9.97501e+09 nm
Abbe number Vd
33.848
Chromatic dispersion dn/dλ
-0.0967963 µm⁻¹
Group index ng
1.70456
Group velocity dispersion
190.778 fs²/mm
Dispersion parameter D
-1040.8 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

# SF2 (SCHOTT): SF2
schott_sf2 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "SF2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_sf2.range_nm)  # (350, 2500) nm
eps = schott_sf2.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=1.40301821λ2λ2−0.0105795466+0.231767504λ2λ2−0.0493226978+0.939056586λ2λ2−112.405955

Valid from 0.35 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.40301821
C30.0105795466
C40.231767504
C50.0493226978
C60.939056586
C7112.405955

Comments and conditions

lead containing glass type. step 0.5 available

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 1.1e-06 1.75e-08 -1.29e-11 1.08e-06 1.03e-09 0.249
nd
1.64769
Vd
33.85
glass code
648339.386
glass status
standard
density
value: 3860
thermal expansion
value: 8.4e-06, temperature range: 243 343; value: 9.2e-06, temperature range: 293 573
dPgF
0.0017
resistance
acid: 2.0; stain: 0.0; alkali: 2.3; climatic: 1.0; phosphate: 2.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 2.22e-06 K⁻¹ at 633 nm, dn/dT = 8.83e-07 K⁻¹ at 1310 nm, dn/dT = 7.83e-07 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 419 wavelengths, the same grid as the API and the library
SF2 (SCHOTT), SF2: n and k versus wavelength
λ (µm)nk
0.351.7095611.107700e-06
0.3517291.7083971.024017e-06
0.3534661.7072539.399206e-07
0.3552121.706138.554088e-07
0.3569671.7050277.704795e-07
0.358731.7039436.851307e-07
0.3605021.7028785.993603e-07
0.3622831.7018315.131662e-07
0.3640731.7008024.265463e-07
0.3651.7002783.816700e-07
0.3658711.699793.635388e-07
0.3676791.6987963.259285e-07
0.3694951.6978182.881324e-07
0.371.697552.776200e-07
0.371321.6968562.632090e-07
0.3731541.695912.431847e-07
0.3749981.694982.230614e-07
0.376851.6940642.028388e-07
0.3787121.6931641.825163e-07
0.381.6925511.684500e-07
0.3805821.6922771.646687e-07
0.3824621.6914051.524601e-07
0.3843521.6905471.401912e-07
0.386251.6897021.278616e-07
0.3881581.688871.154712e-07
0.391.6880831.035100e-07
0.3900761.6880511.031811e-07
0.3920021.6872449.478932e-08
0.3939391.686458.635611e-08
0.3958851.6856687.788124e-08
0.397841.6848976.936451e-08
0.3998061.6841386.080571e-08
0.41.6840645.995900e-08
0.4017811.6833915.639225e-08
0.4037651.6826545.241650e-08
0.4051.6822034.994300e-08
0.405761.6819294.912776e-08
0.4077641.6812144.697695e-08
0.4097781.6805094.481552e-08
0.4118031.6798144.264341e-08
0.4138371.679134.046057e-08
0.4158811.6784553.826695e-08
0.4179351.677793.606249e-08
0.421.6771353.384714e-08
0.421.6771353.384700e-08
0.4220751.6764883.272699e-08
0.424161.6758513.160138e-08
0.4262551.6752223.047021e-08
0.428361.6746032.933345e-08
0.4304761.6739912.819108e-08
0.4326031.6733892.704306e-08
0.434741.6727942.588937e-08
0.4361.6724492.520900e-08
0.4368871.6722082.493054e-08
0.4390451.6716292.425325e-08
0.4412141.6710582.357262e-08
0.4433941.6704952.288862e-08
0.4455841.669942.220125e-08
0.4477851.6693922.151047e-08
0.4499971.6688512.081629e-08
0.452221.6683172.011868e-08
0.4544541.667791.941762e-08
0.4566991.667271.871309e-08
0.4589551.6667571.800509e-08
0.461.6665231.767700e-08
0.4612221.6662511.747857e-08
0.46351.6657511.710851e-08
0.465791.6652581.673662e-08
0.468091.6647711.636290e-08
0.4704031.664291.598733e-08
0.4727261.6638151.560991e-08
0.4750621.6633461.523062e-08
0.4774081.6628831.484946e-08
0.4797671.6624261.446642e-08
0.4821361.6619751.408148e-08
0.4845181.6615291.369464e-08
0.4869121.6610891.330590e-08
0.4893171.6606541.291523e-08
0.4917341.6602251.252263e-08
0.4941631.6598011.212809e-08
0.4966041.6593821.173160e-08
0.4990571.6589681.133316e-08
0.51.6588111.118000e-08
0.5015221.6585591.109832e-08
0.5041.6581551.096538e-08
0.5064891.6577571.083179e-08
0.5089911.6573621.069754e-08
0.5115061.6569731.056263e-08
0.5140321.6565881.042705e-08
0.5165711.6562081.029080e-08
0.5191231.6558321.015387e-08
0.5216881.6554611.001627e-08
0.5242651.6550949.877995e-09
0.5268541.6547329.739033e-09
0.5294571.6543739.599384e-09
0.5320721.6540199.459046e-09
0.5347011.6536699.318014e-09
0.5373421.6533239.176286e-09
0.5399961.6529819.033857e-09
0.5426641.6526438.890725e-09
0.5453441.6523098.746886e-09
0.5461.6522288.711700e-09
0.5480381.6519798.744214e-09
0.5507451.6516528.787402e-09
0.5534661.6513298.830802e-09
0.55621.651018.874418e-09
0.5589471.6506958.918248e-09
0.5617081.6503838.962295e-09
0.5644831.6500749.006560e-09
0.5672721.6497699.051043e-09
0.5700741.6494679.095746e-09
0.572891.6491699.140670e-09
0.575721.6488749.185816e-09
0.5785641.6485829.231185e-09
0.581.6484379.254100e-09
0.5814221.6482949.276785e-09
0.5842941.6480089.322616e-09
0.587181.6477269.368674e-09
0.590081.6474479.414959e-09
0.5929951.6471719.461473e-09
0.5959251.6468989.508216e-09
0.5988681.6466279.555191e-09
0.6018271.646369.602397e-09
0.6047991.6460969.649837e-09
0.6077871.6458349.697511e-09
0.6107891.6455759.745421e-09
0.6138061.6453199.793567e-09
0.6168391.6450669.841951e-09
0.6198861.6448159.890574e-09
0.621.6448069.892400e-09
0.6229481.6445671.009510e-08
0.6260251.6443221.030670e-08
0.6291171.6440791.051935e-08
0.6322251.6438381.073305e-08
0.6353481.6436011.094781e-08
0.6384861.6433651.116362e-08
0.641641.6431321.138051e-08
0.644811.6429021.159846e-08
0.6479951.6426731.181749e-08
0.6511961.6424481.203760e-08
0.6544131.6422241.225880e-08
0.6576461.6420031.248110e-08
0.661.6418431.264300e-08
0.6608941.6417831.256001e-08
0.6641591.6415671.225701e-08
0.667441.6413521.195251e-08
0.6707371.6411391.164651e-08
0.674051.6409291.133900e-08
0.677381.6407211.102996e-08
0.6807261.6405141.071940e-08
0.6840881.640311.040731e-08
0.6874671.6401081.009368e-08
0.6908631.6399079.778491e-09
0.6942761.6397099.461750e-09
0.6977061.6395139.143444e-09
0.71.6393838.930500e-09
0.7011521.6393188.945198e-09
0.7046161.6391258.989382e-09
0.7080961.6389359.033784e-09
0.7115941.6387459.078406e-09
0.7151091.6385589.123248e-09
0.7186421.6383739.168311e-09
0.7221921.6381899.213597e-09
0.7257591.6380079.259107e-09
0.7293441.6378279.304842e-09
0.7329471.6376489.350802e-09
0.7365681.6374719.396990e-09
0.7402061.6372969.443406e-09
0.7438621.6371229.490051e-09
0.7475371.636959.536926e-09
0.751231.636789.584033e-09
0.754941.6366119.631373e-09
0.758671.6364439.678946e-09
0.7624171.6362779.726755e-09
0.7661841.6361139.774800e-09
0.7699681.6359499.823082e-09
0.7737721.6357889.871602e-09
0.7775941.6356289.920362e-09
0.7814351.6354699.969363e-09
0.7852951.6353111.001861e-08
0.7891741.6351551.006809e-08
0.7930731.6351.011782e-08
0.796991.6348471.016780e-08
0.8009271.6346951.021802e-08
0.8048841.6345441.026850e-08
0.808861.6343941.031922e-08
0.8128551.6342461.037019e-08
0.816871.6340991.042141e-08
0.8209061.6339531.047289e-08
0.8249611.6338081.052462e-08
0.8290361.6336651.057660e-08
0.8331311.6335221.062885e-08
0.8372471.6333811.068135e-08
0.8413821.6332411.073411e-08
0.8455391.6331021.078713e-08
0.8497151.6329641.084041e-08
0.8539131.6328271.089396e-08
0.8581311.6326921.094777e-08
0.862371.6325571.100184e-08
0.866631.6324231.105619e-08
0.8709111.632291.111080e-08
0.8752131.6321591.116568e-08
0.8795361.6320281.122083e-08
0.8838811.6318981.127626e-08
0.8882471.6317691.133196e-08
0.8926351.6316421.138793e-08
0.8970441.6315151.144418e-08
0.9014751.6313891.150071e-08
0.9059281.6312631.155752e-08
0.9104031.6311391.161460e-08
0.9149011.6310161.167197e-08
0.919421.6308931.172963e-08
0.9239621.6307711.178757e-08
0.9285261.6306511.184579e-08
0.9331131.630531.190430e-08
0.9377221.6304111.196310e-08
0.9423541.6302931.202220e-08
0.9470091.6301751.208158e-08
0.9516871.6300581.214126e-08
0.9563881.6299421.220123e-08
0.9611121.6298261.226150e-08
0.965861.6297111.232206e-08
0.9706311.6295971.238293e-08
0.9754261.6294841.244409e-08
0.9802441.6293711.250556e-08
0.9850861.6292591.256733e-08
0.9899531.6291471.262941e-08
0.9948431.6290361.269179e-08
0.9997571.6289261.275448e-08
1.00471.6288171.281748e-08
1.009661.6287081.288080e-08
1.014651.6285991.294442e-08
1.019661.6284911.300836e-08
1.024691.6283841.307261e-08
1.029761.6282781.313719e-08
1.034841.6281711.320208e-08
1.039961.6280661.326729e-08
1.045091.6279611.333282e-08
1.050251.6278561.339868e-08
1.055441.6277521.346487e-08
1.061.6276611.352300e-08
1.060661.6276481.360693e-08
1.06591.6275451.427672e-08
1.071161.6274421.494981e-08
1.076451.627341.562623e-08
1.081771.6272381.630599e-08
1.087111.6271371.698910e-08
1.092481.6270361.767559e-08
1.097881.6269361.836548e-08
1.10331.6268351.905877e-08
1.108751.6267361.975548e-08
1.114231.6266362.045564e-08
1.119731.6265372.115925e-08
1.125271.6264382.186634e-08
1.130821.626342.257692e-08
1.136411.6262422.329102e-08
1.142021.6261442.400864e-08
1.147671.6260472.472980e-08
1.153331.625952.545453e-08
1.159031.6258532.618284e-08
1.164761.6257572.691474e-08
1.170511.625662.765027e-08
1.176291.6255642.838942e-08
1.18211.6254692.913223e-08
1.187941.6253732.987870e-08
1.193811.6252783.062886e-08
1.199711.6251833.138273e-08
1.205631.6250883.214032e-08
1.211591.6249933.290166e-08
1.217571.6248993.366675e-08
1.223591.6248043.443563e-08
1.229631.624713.520830e-08
1.235711.6246163.598479e-08
1.241811.6245223.676511e-08
1.247951.6244293.754929e-08
1.254111.6243353.833735e-08
1.260311.6242423.912929e-08
1.266531.6241483.992515e-08
1.272791.6240554.072494e-08
1.279071.6239624.152868e-08
1.285391.6238694.233639e-08
1.291741.6237764.314809e-08
1.298121.6236834.396380e-08
1.304541.623594.478354e-08
1.310981.6234974.560733e-08
1.317461.6234044.643519e-08
1.323961.6233114.726713e-08
1.33051.6232184.810319e-08
1.337081.6231264.894338e-08
1.343681.6230334.978771e-08
1.350321.622945.063622e-08
1.356991.6228475.148892e-08
1.363691.6227545.234583e-08
1.370431.6226615.320698e-08
1.37721.6225685.407238e-08
1.3841.6224755.494205e-08
1.390841.6223815.581602e-08
1.397711.6222885.669431e-08
1.404611.6221955.757693e-08
1.411551.6221015.846392e-08
1.418521.6220085.935528e-08
1.425531.6219146.025105e-08
1.432571.621826.115125e-08
1.439651.6217266.205589e-08
1.446761.6216316.296500e-08
1.453911.6215376.387860e-08
1.461091.6214426.479671e-08
1.468311.6213486.571936e-08
1.475561.6212536.664657e-08
1.482851.6211576.757835e-08
1.490171.6210626.851474e-08
1.497531.6209666.945576e-08
1.504931.620877.040142e-08
1.512371.6207747.135176e-08
1.519841.6206787.230679e-08
1.527341.6205817.326653e-08
1.531.6205477.360600e-08
1.534891.6204848.169551e-08
1.542471.6203879.424032e-08
1.550091.6202891.068471e-07
1.557751.6201911.195162e-07
1.565441.6200931.322478e-07
1.573181.6199941.450423e-07
1.580951.6198951.579000e-07
1.588761.6197961.708213e-07
1.59661.6196961.838064e-07
1.604491.6195961.968556e-07
1.612421.6194962.099692e-07
1.620381.6193952.231477e-07
1.628391.6192932.363913e-07
1.636431.6191922.497002e-07
1.644511.619092.630749e-07
1.652641.6189872.765157e-07
1.66081.6188842.900229e-07
1.6691.618783.035968e-07
1.677251.6186763.172377e-07
1.685531.6185723.309461e-07
1.693861.6184673.447221e-07
1.702231.6183613.585662e-07
1.710641.6182553.724787e-07
1.719091.6181493.864599e-07
1.727581.6180414.005102e-07
1.736111.6179344.146299e-07
1.744691.6178254.288193e-07
1.753311.6177174.430788e-07
1.761971.6176074.574088e-07
1.770671.6174974.718095e-07
1.779421.6173864.862814e-07
1.788211.6172755.008248e-07
1.797041.6171635.154400e-07
1.805921.617055.301274e-07
1.814841.6169375.448874e-07
1.82381.6168235.597202e-07
1.832811.6167085.746264e-07
1.841871.6165925.896061e-07
1.850961.6164766.046599e-07
1.860111.6163596.197880e-07
1.86931.6162416.349909e-07
1.878531.6161236.502689e-07
1.887811.6160046.656223e-07
1.897141.6158846.810516e-07
1.906511.6157636.965570e-07
1.915921.6156417.121391e-07
1.925391.6155197.277982e-07
1.93491.6153957.435346e-07
1.944461.6152717.593487e-07
1.954061.6151467.752410e-07
1.963721.615027.912117e-07
1.971.6149388.016100e-07
1.973421.6148938.182850e-07
1.983161.6147658.658752e-07
1.992961.6146369.137005e-07
2.00281.6145069.617620e-07
2.01271.6143761.010061e-06
2.022641.6142441.058598e-06
2.032631.6141111.107376e-06
2.042671.6139771.156394e-06
2.052761.6138431.205654e-06
2.06291.6137071.255158e-06
2.073091.613571.304906e-06
2.083331.6134321.354900e-06
2.093631.6132931.405141e-06
2.103971.6131531.455630e-06
2.114361.6130111.506369e-06
2.12481.6128691.557358e-06
2.13531.6127251.608599e-06
2.145851.612581.660093e-06
2.156451.6124341.711842e-06
2.16711.6122871.763846e-06
2.177811.6121381.816107e-06
2.188561.6119891.868626e-06
2.199371.6118381.921404e-06
2.210241.6116851.974444e-06
2.221161.6115312.027745e-06
2.232131.6113762.081310e-06
2.243161.611222.135139e-06
2.254241.6110622.189234e-06
2.265371.6109032.243596e-06
2.276561.6107432.298227e-06
2.287811.6105812.353128e-06
2.299111.6104172.408300e-06
2.310471.6102522.463744e-06
2.321881.6100862.519463e-06
2.3251.610042.534700e-06
2.333351.6099182.595257e-06
2.344871.6097492.678865e-06
2.356461.6095782.762885e-06
2.36811.6094052.847321e-06
2.37981.6092312.932174e-06
2.391551.6090553.017446e-06
2.403371.6088783.103139e-06
2.415241.6086993.189255e-06
2.427171.6085183.275797e-06
2.439161.6083353.362766e-06
2.451211.6081513.450165e-06
2.463311.6079653.537996e-06
2.475481.6077773.626261e-06
2.487711.6075873.714961e-06
2.51.6073963.804100e-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
—