Optical constants

Refractive index of N-SF15 (SCHOTT)

N-SF15: 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
1.69892
Extinction coefficient k
2.71316e-08
Permittivity ε1
2.88632
Permittivity ε2
9.21885e-08
Absorption coefficient α
0.00580234 cm⁻¹
Penetration depth δ = λ/(2πk)
3.44689e+09 nm
Abbe number Vd
30.201
Chromatic dispersion dn/dλ
-0.116369 µm⁻¹
Group index ng
1.76729
Group velocity dispersion
234.212 fs²/mm
Dispersion parameter D
-1277.75 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-SF15 (SCHOTT): N-SF15
schott_n_sf15 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SF15", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_sf15.range_nm)  # (370, 2500) nm
eps = schott_n_sf15.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=1.57055634λ2λ2−0.0116507014+0.218987094λ2λ2−0.0597856897+1.50824017λ2λ2−132.709339

Valid from 0.37 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.57055634
C30.0116507014
C40.218987094
C50.0597856897
C61.50824017
C7132.709339

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -7.15e-07 1.04e-08 -2.62e-11 8.56e-07 1.29e-09 0.281
nd
1.69892
Vd
30.2
glass code
699302.292
glass status
standard
density
value: 2921
thermal expansion
value: 8.04e-06, temperature range: 243 343; value: 9.28e-06, temperature range: 293 573
dPgF
0.0108
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 = 1.07e-06 K⁻¹ at 633 nm, dn/dT = -1.03e-07 K⁻¹ at 1310 nm, dn/dT = -1.85e-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 417 wavelengths, the same grid as the API and the library
N-SF15 (SCHOTT), N-SF15: n and k versus wavelength
λ (µm)nk
0.371.7617775.423700e-06
0.3717761.7605314.806209e-06
0.373561.7593094.185754e-06
0.3753531.7581093.562322e-06
0.3771551.7569322.935897e-06
0.3789651.7557762.306465e-06
0.381.7551261.946700e-06
0.3807841.754641.865486e-06
0.3826121.7535251.676222e-06
0.3844481.752431.486048e-06
0.3862941.7513531.294962e-06
0.3881481.7502961.102959e-06
0.391.7492629.111600e-07
0.3900111.7492569.107032e-07
0.3918831.7482358.320577e-07
0.3937641.747237.530346e-07
0.3956541.7462426.736323e-07
0.3975531.7452715.938488e-07
0.3994611.7443165.136824e-07
0.41.744054.910400e-07
0.4013781.7433774.626811e-07
0.4033051.7424524.230445e-07
0.4051.7416553.881700e-07
0.4052411.7415433.851767e-07
0.4071861.7406483.609889e-07
0.409141.7397673.366852e-07
0.4111041.7389013.122647e-07
0.4130771.7380472.877270e-07
0.415061.7372072.630716e-07
0.4170521.736382.382978e-07
0.4190541.7355662.134051e-07
0.421.7351872.016400e-07
0.4210651.7347641.967264e-07
0.4230861.7339741.874044e-07
0.4251171.7331961.780376e-07
0.4271581.7324291.686259e-07
0.4292081.7316741.591690e-07
0.4312681.730931.496667e-07
0.4333381.7301971.401188e-07
0.4354181.7294751.305251e-07
0.4361.7292751.278400e-07
0.4375081.7287631.252073e-07
0.4396081.7280611.215406e-07
0.4417181.7273691.178563e-07
0.4438381.7266871.141543e-07
0.4459681.7260151.104346e-07
0.4481091.7253521.066970e-07
0.450261.7246981.029414e-07
0.4524211.7240539.916786e-08
0.4545921.7234189.537618e-08
0.4567741.7227919.156630e-08
0.4589671.7221728.773813e-08
0.461.7218858.593400e-08
0.461171.7215628.483865e-08
0.4633831.720968.276585e-08
0.4656071.7203678.068310e-08
0.4678421.7197817.859035e-08
0.4700881.7192037.648756e-08
0.4723441.7186337.437467e-08
0.4746111.718077.225165e-08
0.4768891.7175147.011843e-08
0.4791781.7169666.797497e-08
0.4814781.7164256.582123e-08
0.4837891.7158916.365715e-08
0.4861111.7153646.148268e-08
0.4884451.7148435.929777e-08
0.4907891.7143295.710238e-08
0.4931451.7138225.489644e-08
0.4955121.7133215.267992e-08
0.497891.7128275.045277e-08
0.51.7123954.847700e-08
0.500281.7123384.834187e-08
0.5026811.7118564.718248e-08
0.5050941.7113794.601753e-08
0.5075181.7109094.484699e-08
0.5099541.7104444.367083e-08
0.5124021.7099854.248903e-08
0.5148611.7095324.130155e-08
0.5173331.7090844.010837e-08
0.5198161.7086413.890947e-08
0.5223111.7082043.770481e-08
0.5248181.7077723.649436e-08
0.5273371.7073453.527811e-08
0.5298681.7069243.405602e-08
0.5324111.7065073.282807e-08
0.5349671.7060953.159422e-08
0.5375341.7056883.035445e-08
0.5401141.7052862.910873e-08
0.5427071.7048892.785703e-08
0.5453121.7044962.659932e-08
0.5461.7043932.626700e-08
0.5479291.7041082.625350e-08
0.5505591.7037242.623509e-08
0.5532021.7033452.621659e-08
0.5558571.7029692.619800e-08
0.5585251.7025992.617933e-08
0.5612061.7022322.616056e-08
0.5638991.701872.614170e-08
0.5666061.7015112.612276e-08
0.5693261.7011572.610372e-08
0.5720581.7008072.608459e-08
0.5748041.700462.606537e-08
0.5775631.7001182.604606e-08
0.581.6998192.602900e-08
0.5803351.6997792.607763e-08
0.5831211.6994442.648174e-08
0.585921.6991122.688778e-08
0.5887321.6987852.729578e-08
0.5915581.698462.770573e-08
0.5943971.698142.811765e-08
0.597251.6978222.853155e-08
0.6001171.6975092.894743e-08
0.6029971.6971982.936531e-08
0.6058911.6968912.978520e-08
0.60881.6965873.020710e-08
0.6117221.6962873.063103e-08
0.6146581.6959893.105699e-08
0.6176081.6956953.148500e-08
0.621.695463.183200e-08
0.6205731.6954043.189196e-08
0.6235511.6951163.220389e-08
0.6265441.694833.251733e-08
0.6295511.6945483.283227e-08
0.6325731.6942693.314872e-08
0.6356091.6939933.346669e-08
0.638661.6937193.378618e-08
0.6417261.6934483.410721e-08
0.6448061.693183.442978e-08
0.6479011.6929153.475390e-08
0.651011.6926523.507957e-08
0.6541351.6923923.540681e-08
0.6572751.6921353.573562e-08
0.661.6919153.602100e-08
0.660431.691883.592301e-08
0.66361.6916283.520019e-08
0.6667851.6913783.447389e-08
0.6699851.6911313.374411e-08
0.6732011.6908863.301083e-08
0.6764321.6906433.227402e-08
0.6796791.6904033.153368e-08
0.6829411.6901653.078979e-08
0.6862191.689933.004233e-08
0.6895131.6896962.929128e-08
0.6928231.6894652.853662e-08
0.6961481.6892372.777834e-08
0.6994891.689012.701642e-08
0.71.6889762.690000e-08
0.7028471.6887852.679422e-08
0.706221.6885632.666886e-08
0.709611.6883432.654290e-08
0.7130161.6881242.641634e-08
0.7164381.6879082.628918e-08
0.7198771.6876942.616140e-08
0.7233321.6874822.603300e-08
0.7268041.6872712.590400e-08
0.7302931.6870632.577437e-08
0.7337981.6868562.564412e-08
0.737321.6866522.551324e-08
0.7408591.6864492.538174e-08
0.7444151.6862482.524961e-08
0.7479881.6860482.511684e-08
0.7515781.6858512.498343e-08
0.7551861.6856552.484938e-08
0.7588111.6854612.471469e-08
0.7624531.6852692.457936e-08
0.7661121.6850782.444337e-08
0.769791.6848892.430673e-08
0.7734841.6847012.416944e-08
0.7771971.6845152.403149e-08
0.7809271.6843312.389287e-08
0.7846761.6841482.375359e-08
0.7884421.6839672.361364e-08
0.7922261.6837872.347302e-08
0.7960291.6836092.333172e-08
0.799851.6834322.318975e-08
0.8036891.6832572.304710e-08
0.8075461.6830832.290375e-08
0.8114221.682912.275973e-08
0.8153171.6827392.261501e-08
0.8192311.6825692.246959e-08
0.8231631.68242.232348e-08
0.8271141.6822332.217667e-08
0.8310841.6820672.202915e-08
0.8350731.6819032.188092e-08
0.8390811.6817392.173198e-08
0.8431081.6815772.158233e-08
0.8471551.6814162.143196e-08
0.8512211.6812562.128087e-08
0.8553071.6810982.112905e-08
0.8594121.6809412.097650e-08
0.8635371.6807842.082323e-08
0.8676821.6806292.066921e-08
0.8718471.6804752.051446e-08
0.8760321.6803222.035896e-08
0.8802361.680172.020272e-08
0.8844611.680022.004573e-08
0.8887071.679871.988798e-08
0.8929721.6797211.972948e-08
0.8972581.6795731.957021e-08
0.9015651.6794271.941018e-08
0.9058921.6792811.924939e-08
0.910241.6791361.908782e-08
0.9146091.6789921.892547e-08
0.9189991.6788491.876235e-08
0.923411.6787071.859844e-08
0.9278431.6785661.843375e-08
0.9322961.6784261.826827e-08
0.9367711.6782871.810199e-08
0.9412671.6781481.793491e-08
0.9457851.678011.776704e-08
0.9503251.6778741.759835e-08
0.9548861.6777371.742886e-08
0.9594691.6776021.725855e-08
0.9640751.6774681.708743e-08
0.9687021.6773341.691548e-08
0.9733521.6772011.674271e-08
0.9780231.6770691.656911e-08
0.9827181.6769371.639468e-08
0.9874351.6768061.621941e-08
0.9921741.6766761.604330e-08
0.9969361.6765461.586634e-08
1.001721.6764181.568853e-08
1.006531.6762891.550987e-08
1.011361.6761621.533035e-08
1.016221.6760351.514998e-08
1.021091.6759081.496873e-08
1.025991.6757831.478662e-08
1.030921.6756581.460363e-08
1.035871.6755331.441976e-08
1.040841.6754091.423501e-08
1.045831.6752851.404937e-08
1.050851.6751621.386284e-08
1.05591.675041.367542e-08
1.061.6749411.352300e-08
1.060971.6749181.373841e-08
1.066061.6747961.487377e-08
1.071181.6746751.601458e-08
1.076321.6745551.716087e-08
1.081481.6744351.831266e-08
1.086671.6743151.946998e-08
1.091891.6741962.063286e-08
1.097131.6740772.180131e-08
1.10241.6739592.297538e-08
1.107691.673842.415508e-08
1.1131.6737232.534044e-08
1.118351.6736052.653149e-08
1.123711.6734892.772826e-08
1.129111.6733722.893077e-08
1.134531.6732563.013906e-08
1.139971.673143.135314e-08
1.145451.6730243.257306e-08
1.150941.6729093.379882e-08
1.156471.6727943.503047e-08
1.162021.6726793.626803e-08
1.16761.6725643.751154e-08
1.17321.672453.876101e-08
1.178831.6723364.001648e-08
1.184491.6722224.127797e-08
1.190171.6721084.254552e-08
1.195891.6719954.381915e-08
1.201631.6718814.509890e-08
1.207391.6717684.638479e-08
1.213191.6716554.767685e-08
1.219011.6715434.897511e-08
1.224861.671435.027960e-08
1.230741.6713175.159036e-08
1.236651.6712055.290740e-08
1.242591.6710935.423077e-08
1.248551.6709815.556049e-08
1.254541.6708685.689659e-08
1.260561.6707565.823911e-08
1.266621.6706445.958807e-08
1.272691.6705336.094350e-08
1.27881.6704216.230544e-08
1.284941.6703096.367392e-08
1.291111.6701976.504896e-08
1.297311.6700856.643061e-08
1.303531.6699736.781889e-08
1.309791.6698616.921383e-08
1.316081.6697497.061546e-08
1.322391.6696387.202382e-08
1.328741.6695267.343895e-08
1.335121.6694137.486086e-08
1.341531.6693017.628960e-08
1.347971.6691897.772520e-08
1.354441.6690777.916769e-08
1.360941.6689648.061710e-08
1.367471.6688528.207347e-08
1.374031.6687398.353683e-08
1.380631.6686268.500722e-08
1.387251.6685138.648466e-08
1.393911.66848.796919e-08
1.40061.6682878.946085e-08
1.407331.6681749.095966e-08
1.414081.668069.246568e-08
1.420871.6679469.397892e-08
1.427691.6678329.549942e-08
1.434541.6677179.702722e-08
1.441431.6676039.856236e-08
1.448341.6674881.001049e-07
1.45531.6673731.016548e-07
1.462281.6672571.032121e-07
1.46931.6671421.047769e-07
1.476351.6670261.063493e-07
1.483441.6669091.079291e-07
1.490561.6667931.095166e-07
1.497711.6666761.111117e-07
1.50491.6665581.127144e-07
1.512131.6664411.143249e-07
1.519381.6663231.159430e-07
1.526681.6662041.175689e-07
1.531.666151.183100e-07
1.5341.6660851.238831e-07
1.541371.6659661.341316e-07
1.548771.6658461.444293e-07
1.55621.6657261.547764e-07
1.563671.6656061.651733e-07
1.571171.6654851.756200e-07
1.578711.6653631.861168e-07
1.586291.6652411.966641e-07
1.593911.6651192.072619e-07
1.601561.6649962.179107e-07
1.609241.6648722.286105e-07
1.616971.6647482.393617e-07
1.624731.6646232.501645e-07
1.632531.6644982.610191e-07
1.640361.6643722.719259e-07
1.648241.6642462.828850e-07
1.656151.6641192.938967e-07
1.66411.6639923.049613e-07
1.672081.6638633.160789e-07
1.680111.6637353.272500e-07
1.688171.6636053.384746e-07
1.696281.6634753.497531e-07
1.704421.6633443.610858e-07
1.71261.6632133.724729e-07
1.720821.6630813.839146e-07
1.729081.6629483.954112e-07
1.737381.6628144.069630e-07
1.745721.662684.185703e-07
1.75411.6625444.302332e-07
1.762521.6624084.419522e-07
1.770981.6622724.537274e-07
1.779481.6621344.655591e-07
1.788021.6619964.774476e-07
1.79661.6618574.893932e-07
1.805221.6617175.013961e-07
1.813891.6615765.134566e-07
1.822591.6614345.255750e-07
1.831341.6612915.377516e-07
1.840131.6611485.499866e-07
1.848971.6610035.622803e-07
1.857841.6608585.746331e-07
1.866761.6607115.870451e-07
1.875721.6605645.995168e-07
1.884721.6604166.120482e-07
1.893771.6602666.246399e-07
1.902861.6601166.372919e-07
1.911991.6599646.500047e-07
1.921171.6598126.627785e-07
1.930391.6596586.756137e-07
1.939651.6595046.885104e-07
1.948961.6593487.014690e-07
1.958321.6591917.144898e-07
1.967721.6590337.275732e-07
1.971.6589957.307500e-07
1.977161.6588747.826425e-07
1.986651.6587148.513996e-07
1.996191.6585529.204867e-07
2.005771.658399.899054e-07
2.01541.6582261.059657e-06
2.025071.6580611.129744e-06
2.034791.6578941.200167e-06
2.044561.6577271.270928e-06
2.054371.6575581.342029e-06
2.064231.6573871.413471e-06
2.074141.6572161.485256e-06
2.084091.6570431.557386e-06
2.09411.6568681.629861e-06
2.104151.6566931.702685e-06
2.114251.6565151.775858e-06
2.12441.6563371.849382e-06
2.134591.6561571.923260e-06
2.144841.6559751.997491e-06
2.155131.6557922.072079e-06
2.165481.6556082.147026e-06
2.175871.6554222.222332e-06
2.186321.6552342.297999e-06
2.196811.6550452.374029e-06
2.207351.6548542.450425e-06
2.217951.6546622.527187e-06
2.228591.6544682.604317e-06
2.239291.6542722.681818e-06
2.250041.6540752.759691e-06
2.260841.6538762.837938e-06
2.271691.6536752.916560e-06
2.282591.6534722.995559e-06
2.293551.6532683.074938e-06
2.304561.6530623.154698e-06
2.315621.6528543.234840e-06
2.3251.6526773.302800e-06
2.326731.6526443.323174e-06
2.33791.6524333.454348e-06
2.349121.6522193.586153e-06
2.36041.6520033.718590e-06
2.371731.6517863.851663e-06
2.383111.6515663.985374e-06
2.394551.6513454.119727e-06
2.406041.6511224.254725e-06
2.417591.6508964.390371e-06
2.42921.6506684.526669e-06
2.440861.6504394.663620e-06
2.452571.6502074.801229e-06
2.464341.6499734.939498e-06
2.476171.6497375.078431e-06
2.488061.6494985.218030e-06
2.51.6492575.358300e-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
—