Optical constants

Refractive index of N-SF1 (SCHOTT)

N-SF1: n,k 0.37–2.5 µm

Data
formula 2 + tabulated k
Range
0.37–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.37–2.5 µm
Refractive index n
1.71736
Extinction coefficient k
1.99361e-08
Permittivity ε1
2.94931
Permittivity ε2
6.84748e-08
Absorption coefficient α
0.00426352 cm⁻¹
Penetration depth δ = λ/(2πk)
4.69096e+09 nm
Abbe number Vd
29.62
Chromatic dispersion dn/dλ
-0.121768 µm⁻¹
Group index ng
1.78891
Group velocity dispersion
245.623 fs²/mm
Dispersion parameter D
-1340.01 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-SF1 (SCHOTT): N-SF1
schott_n_sf1 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SF1", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_sf1.range_nm)  # (370, 2500) nm
eps = schott_n_sf1.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=1.60865158λ2λ2−0.0119654879+0.237725916λ2λ2−0.0590589722+1.51530653λ2λ2−135.521676

Valid from 0.37 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.60865158
C30.0119654879
C40.237725916
C50.0590589722
C61.51530653
C7135.521676

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -3.72e-06 8.05e-09 -1.71e-11 8.98e-07 1.34e-09 0.276
nd
1.71736
Vd
29.62
glass code
717296.303
glass status
standard
density
value: 3025
thermal expansion
value: 9.13e-06, temperature range: 243 343; value: 1.054e-05, temperature range: 293 573
dPgF
0.0097
resistance
acid: 1.0; 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 = -5.38e-07 K⁻¹ at 633 nm, dn/dT = -1.74e-06 K⁻¹ at 1310 nm, dn/dT = -1.82e-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 417 wavelengths, the same grid as the API and the library
N-SF1 (SCHOTT), N-SF1: n and k versus wavelength
λ (µm)nk
0.371.7830534.129800e-06
0.3717761.7817563.694164e-06
0.373561.7804833.256438e-06
0.3753531.7792332.816610e-06
0.3771551.7780062.374672e-06
0.3789651.7768011.930612e-06
0.381.7761241.676800e-06
0.3807841.7756171.608960e-06
0.3826121.7744551.450863e-06
0.3844481.7733121.292007e-06
0.3862941.772191.132389e-06
0.3881481.7710879.720040e-07
0.391.7700098.117900e-07
0.3900111.7700028.114011e-07
0.3918831.7689367.444480e-07
0.3937641.7678886.771734e-07
0.3956541.7668576.095760e-07
0.3975531.7658435.416541e-07
0.3994611.7648464.734062e-07
0.41.7645684.541300e-07
0.4013781.7638654.264686e-07
0.4033051.76293.878067e-07
0.4051.7620673.537900e-07
0.4052411.761953.511003e-07
0.4071861.7610163.293660e-07
0.409141.7600963.075273e-07
0.4111041.759192.855839e-07
0.4130771.7582992.635351e-07
0.415061.7574212.413805e-07
0.4170521.7565572.191196e-07
0.4190541.7557051.967518e-07
0.421.7553091.861800e-07
0.4210651.7548671.824988e-07
0.4230861.7540421.755149e-07
0.4251171.7532281.684974e-07
0.4271581.7524271.614463e-07
0.4292081.7516371.543613e-07
0.4312681.7508591.472423e-07
0.4333381.7500931.400891e-07
0.4354181.7493371.329017e-07
0.4361.7491281.308900e-07
0.4375081.7485931.283588e-07
0.4396081.7478591.248335e-07
0.4417181.7471351.212913e-07
0.4438381.7464221.177321e-07
0.4459681.7457181.141558e-07
0.4481091.7450251.105623e-07
0.450261.7443411.069516e-07
0.4524211.7436671.033235e-07
0.4545921.7430029.967806e-08
0.4567741.7423459.601510e-08
0.4589671.7416989.233456e-08
0.461.7413989.060000e-08
0.461171.741068.946427e-08
0.4633831.740438.731505e-08
0.4656071.7398098.515551e-08
0.4678421.7391968.298560e-08
0.4700881.7385918.080528e-08
0.4723441.7379947.861449e-08
0.4746111.7374057.641319e-08
0.4768891.7368247.420133e-08
0.4791781.736257.197884e-08
0.4814781.7356846.974569e-08
0.4837891.7351256.750182e-08
0.4861111.7345736.524718e-08
0.4884451.7340286.298172e-08
0.4907891.733496.070538e-08
0.4931451.7329595.841812e-08
0.4955121.7324345.611988e-08
0.497891.7319175.381061e-08
0.51.7314655.176200e-08
0.500281.7314055.159616e-08
0.5026811.73095.017326e-08
0.5050941.7304024.874353e-08
0.5075181.7299094.730695e-08
0.5099541.7294234.586346e-08
0.5124021.7289424.441305e-08
0.5148611.7284674.295567e-08
0.5173331.7279994.149131e-08
0.5198161.7275354.001991e-08
0.5223111.7270783.854145e-08
0.5248181.7266263.705589e-08
0.5273371.7261793.556320e-08
0.5298681.7257373.406335e-08
0.5324111.7253013.255630e-08
0.5349671.724873.104202e-08
0.5375341.7244442.952047e-08
0.5401141.7240232.799161e-08
0.5427071.7236072.645542e-08
0.5453121.7231962.491185e-08
0.5461.7230882.450400e-08
0.5479291.7227892.416646e-08
0.5505591.7223882.370630e-08
0.5532021.721992.324392e-08
0.5558571.7215982.277933e-08
0.5585251.721212.231251e-08
0.5612061.7208262.184344e-08
0.5638991.7204472.137213e-08
0.5666061.7200722.089855e-08
0.5693261.7197012.042270e-08
0.5720581.7193341.994457e-08
0.5748041.7189721.946414e-08
0.5775631.7186131.898140e-08
0.581.7183011.855500e-08
0.5803351.7182581.861591e-08
0.5831211.7179081.912211e-08
0.585921.7175611.963073e-08
0.5887321.7172182.014180e-08
0.5915581.7168792.065532e-08
0.5943971.7165432.117130e-08
0.597251.7162112.168976e-08
0.6001171.7158832.221071e-08
0.6029971.7155582.273416e-08
0.6058911.7152372.326012e-08
0.60881.7149192.378861e-08
0.6117221.7146052.431963e-08
0.6146581.7142942.485320e-08
0.6176081.7139862.538933e-08
0.621.713742.582400e-08
0.6205731.7136812.587833e-08
0.6235511.713382.616100e-08
0.6265441.7130822.644503e-08
0.6295511.7127872.673042e-08
0.6325731.7124952.701719e-08
0.6356091.7122052.730533e-08
0.638661.7119192.759485e-08
0.6417261.7116362.788576e-08
0.6448061.7113562.817806e-08
0.6479011.7110792.847178e-08
0.651011.7108042.876690e-08
0.6541351.7105332.906343e-08
0.6572751.7102642.936139e-08
0.661.7100332.962000e-08
0.660431.7099972.954237e-08
0.66361.7097342.896972e-08
0.6667851.7094732.839432e-08
0.6699851.7092142.781616e-08
0.6732011.7089582.723523e-08
0.6764321.7087052.665150e-08
0.6796791.7084542.606498e-08
0.6829411.7082062.547564e-08
0.6862191.707962.488347e-08
0.6895131.7077162.428846e-08
0.6928231.7074752.369059e-08
0.6961481.7072362.308986e-08
0.6994891.7069992.248624e-08
0.71.7069632.239400e-08
0.7028471.7067652.235066e-08
0.706221.7065332.229929e-08
0.709611.7063032.224769e-08
0.7130161.7060752.219583e-08
0.7164381.7058492.214372e-08
0.7198771.7056262.209137e-08
0.7233321.7054042.203876e-08
0.7268041.7051852.198590e-08
0.7302931.7049672.193279e-08
0.7337981.7047522.187942e-08
0.737321.7045382.182580e-08
0.7408591.7043272.177192e-08
0.7444151.7041172.171778e-08
0.7479881.7039092.166338e-08
0.7515781.7037032.160872e-08
0.7551861.7034992.155379e-08
0.7588111.7032972.149861e-08
0.7624531.7030972.144316e-08
0.7661121.7028982.138744e-08
0.769791.7027012.133145e-08
0.7734841.7025062.127520e-08
0.7771971.7023122.121868e-08
0.7809271.702122.116188e-08
0.7846761.701932.110481e-08
0.7884421.7017412.104747e-08
0.7922261.7015542.098985e-08
0.7960291.7013682.093196e-08
0.799851.7011842.087379e-08
0.8036891.7010022.081534e-08
0.8075461.7008212.075661e-08
0.8114221.7006412.069759e-08
0.8153171.7004632.063830e-08
0.8192311.7002872.057872e-08
0.8231631.7001112.051885e-08
0.8271141.6999382.045869e-08
0.8310841.6997652.039825e-08
0.8350731.6995942.033752e-08
0.8390811.6994242.027649e-08
0.8431081.6992562.021518e-08
0.8471551.6990892.015356e-08
0.8512211.6989232.009166e-08
0.8553071.6987582.002945e-08
0.8594121.6985951.996695e-08
0.8635371.6984331.990414e-08
0.8676821.6982721.984104e-08
0.8718471.6981121.977763e-08
0.8760321.6979541.971392e-08
0.8802361.6977961.964990e-08
0.8844611.697641.958558e-08
0.8887071.6974851.952094e-08
0.8929721.697331.945600e-08
0.8972581.6971771.939074e-08
0.9015651.6970251.932517e-08
0.9058921.6968751.925929e-08
0.910241.6967251.919309e-08
0.9146091.6965761.912657e-08
0.9189991.6964281.905974e-08
0.923411.6962811.899258e-08
0.9278431.6961351.892510e-08
0.9322961.695991.885729e-08
0.9367711.6958461.878916e-08
0.9412671.6957031.872071e-08
0.9457851.695561.865192e-08
0.9503251.6954191.858281e-08
0.9548861.6952781.851336e-08
0.9594691.6951391.844358e-08
0.9640751.6951.837346e-08
0.9687021.6948621.830301e-08
0.9733521.6947241.823222e-08
0.9780231.6945881.816109e-08
0.9827181.6944521.808962e-08
0.9874351.6943171.801781e-08
0.9921741.6941831.794565e-08
0.9969361.694051.787314e-08
1.001721.6939171.780029e-08
1.006531.6937851.772709e-08
1.011361.6936531.765353e-08
1.016221.6935231.757963e-08
1.021091.6933931.750536e-08
1.025991.6932631.743075e-08
1.030921.6931351.735577e-08
1.035871.6930071.728043e-08
1.040841.6928791.720473e-08
1.045831.6927521.712867e-08
1.050851.6926261.705225e-08
1.05591.69251.697545e-08
1.061.6923991.691300e-08
1.060971.6923751.715225e-08
1.066061.692251.841330e-08
1.071181.6921261.968040e-08
1.076321.6920022.095359e-08
1.081481.6918792.223288e-08
1.086671.6917572.351832e-08
1.091891.6916342.480993e-08
1.097131.6915132.610773e-08
1.10241.6913912.741176e-08
1.107691.6912712.872206e-08
1.1131.691153.003864e-08
1.118351.691033.136154e-08
1.123711.6909113.269079e-08
1.129111.6907923.402643e-08
1.134531.6906733.536847e-08
1.139971.6905543.671695e-08
1.145451.6904363.807191e-08
1.150941.6903183.943337e-08
1.156471.6902014.080137e-08
1.162021.6900844.217593e-08
1.16761.6899674.355709e-08
1.17321.689854.494487e-08
1.178831.6897344.633932e-08
1.184491.6896184.774047e-08
1.190171.6895034.914833e-08
1.195891.6893875.056296e-08
1.201631.6892725.198437e-08
1.207391.6891575.341261e-08
1.213191.6890425.484770e-08
1.219011.6889275.628968e-08
1.224861.6888135.773859e-08
1.230741.6886995.919444e-08
1.236651.6885856.065729e-08
1.242591.6884716.212715e-08
1.248551.6883576.360407e-08
1.254541.6882436.508808e-08
1.260561.6881296.657922e-08
1.266621.6880166.807751e-08
1.272691.6879036.958299e-08
1.27881.6877897.109569e-08
1.284941.6876767.261566e-08
1.291111.6875637.414293e-08
1.297311.687457.567752e-08
1.303531.6873377.721948e-08
1.309791.6872247.876884e-08
1.316081.6871118.032564e-08
1.322391.6869988.188991e-08
1.328741.6868858.346169e-08
1.335121.6867728.504101e-08
1.341531.6866588.662791e-08
1.347971.6865458.822243e-08
1.354441.6864328.982461e-08
1.360941.6863199.143447e-08
1.367471.6862059.305206e-08
1.374031.6860929.467742e-08
1.380631.6859789.631057e-08
1.387251.6858659.795157e-08
1.393911.6857519.960044e-08
1.40061.6856371.012572e-07
1.407331.6855231.029220e-07
1.414081.6854091.045947e-07
1.420871.6852951.062754e-07
1.427691.685181.079643e-07
1.434541.6850651.096612e-07
1.441431.684951.113663e-07
1.448341.6848351.130795e-07
1.45531.684721.148010e-07
1.462281.6846041.165308e-07
1.46931.6844881.182688e-07
1.476351.6843721.200152e-07
1.483441.6842561.217700e-07
1.490561.6841391.235332e-07
1.497711.6840221.253048e-07
1.50491.6839041.270850e-07
1.512131.6837871.288737e-07
1.519381.6836691.306710e-07
1.526681.683551.324769e-07
1.531.6834971.333000e-07
1.5341.6834321.413606e-07
1.541371.6833131.561835e-07
1.548771.6831931.710775e-07
1.55621.6830731.860431e-07
1.563671.6829532.010805e-07
1.571171.6828332.161900e-07
1.578711.6827112.313721e-07
1.586291.682592.466271e-07
1.593911.6824682.619552e-07
1.601561.6823462.773570e-07
1.609241.6822232.928327e-07
1.616971.6820993.083826e-07
1.624731.6819753.240072e-07
1.632531.6818513.397068e-07
1.640361.6817263.554817e-07
1.648241.68163.713324e-07
1.656151.6814743.872591e-07
1.66411.6813484.032623e-07
1.672081.681224.193423e-07
1.680111.6810924.354994e-07
1.688171.6809644.517342e-07
1.696281.6808354.680468e-07
1.704421.6807054.844378e-07
1.71261.6805755.009074e-07
1.720821.6804445.174560e-07
1.729081.6803125.340841e-07
1.737381.680185.507921e-07
1.745721.6800475.675802e-07
1.75411.6799135.844489e-07
1.762521.6797786.013985e-07
1.770981.6796436.184295e-07
1.779481.6795076.355423e-07
1.788021.679376.527372e-07
1.79661.6792336.700146e-07
1.805221.6790946.873749e-07
1.813891.6789557.048186e-07
1.822591.6788157.223460e-07
1.831341.6786747.399576e-07
1.840131.6785327.576536e-07
1.848971.678397.754346e-07
1.857841.6782467.933010e-07
1.866761.6781028.112531e-07
1.875721.6779568.292914e-07
1.884721.677818.474162e-07
1.893771.6776638.656280e-07
1.902861.6775158.839273e-07
1.911991.6773659.023144e-07
1.921171.6772159.207897e-07
1.930391.6770649.393538e-07
1.939651.6769129.580069e-07
1.948961.6767599.767496e-07
1.958321.6766049.955822e-07
1.967721.6764491.014505e-06
1.971.6764111.019100e-06
1.977161.6762921.079875e-06
1.986651.6761341.160401e-06
1.996191.6759761.241313e-06
2.005771.6758161.322614e-06
2.01541.6756551.404305e-06
2.025071.6754921.486389e-06
2.034791.6753291.568866e-06
2.044561.6751641.651739e-06
2.054371.6749981.735010e-06
2.064231.6748311.818680e-06
2.074141.6746621.902753e-06
2.084091.6744921.987228e-06
2.09411.6743212.072109e-06
2.104151.6741492.157398e-06
2.114251.6739752.243096e-06
2.12441.67382.329205e-06
2.134591.6736232.415728e-06
2.144841.6734452.502666e-06
2.155131.6732662.590021e-06
2.165481.6730852.677795e-06
2.175871.6729032.765991e-06
2.186321.6727192.854610e-06
2.196811.6725332.943654e-06
2.207351.6723473.033126e-06
2.217951.6721583.123028e-06
2.228591.6719683.213360e-06
2.239291.6717763.304127e-06
2.250041.6715833.395329e-06
2.260841.6713883.486969e-06
2.271691.6711923.579048e-06
2.282591.6709943.671570e-06
2.293551.6707943.764535e-06
2.304561.6705923.857947e-06
2.315621.6703883.951808e-06
2.3251.6702154.031400e-06
2.326731.6701834.052690e-06
2.33791.6699764.189768e-06
2.349121.6697674.327504e-06
2.36041.6695574.465901e-06
2.371731.6693444.604962e-06
2.383111.669134.744691e-06
2.394551.6689134.885090e-06
2.406041.6686955.026163e-06
2.417591.6684745.167913e-06
2.42921.6682525.310344e-06
2.440861.6680285.453458e-06
2.452571.6678015.597260e-06
2.464341.6675735.741751e-06
2.476171.6673425.886936e-06
2.488061.6671096.032818e-06
2.51.6668746.179400e-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
—