Optical constants

Refractive index of N-SF2 (SCHOTT)

N-SF2: 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
1.64769
Extinction coefficient k
2.56161e-08
Permittivity ε1
2.71487
Permittivity ε2
8.44145e-08
Absorption coefficient α
0.00547823 cm⁻¹
Penetration depth δ = λ/(2πk)
3.65081e+09 nm
Abbe number Vd
33.82
Chromatic dispersion dn/dλ
-0.096681 µm⁻¹
Group index ng
1.7045
Group velocity dispersion
190.716 fs²/mm
Dispersion parameter D
-1040.46 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-SF2 (SCHOTT): N-SF2
schott_n_sf2 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SF2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_sf2.range_nm)  # (365, 2500) nm
eps = schott_n_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=1.47343127λ2λ2−0.0109019098+0.163681849λ2λ2−0.0585683687+1.36920899λ2λ2−127.404933

Valid from 0.365 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.47343127
C30.0109019098
C40.163681849
C50.0585683687
C61.36920899
C7127.404933

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 3.1e-06 1.75e-08 6.62e-11 7.51e-07 8.99e-10 0.277
nd
1.64769
Vd
33.82
glass code
648338.272
glass status
standard
density
value: 2718
thermal expansion
value: 6.68e-06, temperature range: 243 343; value: 7.81e-06, temperature range: 293 573
dPgF
0.0081
resistance
acid: 1.0; stain: 0.0; alkali: 1.2; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 2.81e-06 K⁻¹ at 633 nm, dn/dT = 1.79e-06 K⁻¹ at 1310 nm, dn/dT = 1.71e-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-SF2 (SCHOTT), N-SF2: n and k versus wavelength
λ (µm)nk
0.3651.7015895.764800e-06
0.3667641.7005414.899767e-06
0.3685371.6995114.030552e-06
0.371.698683.313500e-06
0.3703191.69853.243167e-06
0.3721091.6975082.848403e-06
0.3739081.6965342.451731e-06
0.3757151.6955772.053142e-06
0.3775321.6946361.652625e-06
0.3793571.6937121.250173e-06
0.381.6933921.108300e-06
0.381191.6928051.033354e-06
0.3830331.6919129.173489e-07
0.3848851.6910358.007826e-07
0.3867451.6901736.836527e-07
0.3886151.6893255.659567e-07
0.391.6887084.787600e-07
0.3904941.6884914.668408e-07
0.3923811.6876714.212497e-07
0.3942781.6868643.754382e-07
0.3961841.686073.294052e-07
0.3980991.6852892.831497e-07
0.41.684532.372400e-07
0.4000241.684522.370029e-07
0.4019571.6837642.175572e-07
0.40391.6830191.980175e-07
0.4051.6826041.869600e-07
0.4058531.6822861.821736e-07
0.4078151.6815641.711632e-07
0.4097861.6808531.600997e-07
0.4117671.6801541.489827e-07
0.4137581.6794641.378119e-07
0.4157581.6787851.265872e-07
0.4177681.6781161.153082e-07
0.4197871.6774571.039746e-07
0.421.6773891.027800e-07
0.4218161.6768089.935924e-08
0.4238561.6761689.551912e-08
0.4259041.6755389.166043e-08
0.4279631.6749178.778310e-08
0.4300321.6743048.388702e-08
0.4321111.67377.997210e-08
0.43421.6731057.603826e-08
0.4361.6726017.264800e-08
0.4362991.6725187.246876e-08
0.4384081.671947.120330e-08
0.4405271.6713696.993172e-08
0.4426571.6708076.865400e-08
0.4447971.6702526.737010e-08
0.4469471.6697056.607999e-08
0.4491071.6691656.478364e-08
0.4512781.6686326.348103e-08
0.453461.6681076.217213e-08
0.4556521.6675896.085689e-08
0.4578551.6670785.953530e-08
0.461.6665885.824800e-08
0.4600681.6665735.821757e-08
0.4622921.6660755.721938e-08
0.4645271.6655845.621637e-08
0.4667721.6650995.520850e-08
0.4690291.664625.419577e-08
0.4712961.6641485.317814e-08
0.4735741.6636815.215559e-08
0.4758631.6632215.112810e-08
0.4781641.6627665.009564e-08
0.4804751.6623184.905819e-08
0.4827981.6618754.801573e-08
0.4851321.6614374.696822e-08
0.4874771.6610054.591566e-08
0.4898331.6605794.485800e-08
0.4922011.6601574.379523e-08
0.4945811.6597414.272732e-08
0.4969721.659334.165426e-08
0.4993741.6589244.057600e-08
0.51.6588194.029500e-08
0.5017881.6585233.968123e-08
0.5042141.6581273.884854e-08
0.5066511.6577363.801182e-08
0.50911.6573493.717106e-08
0.5115611.6569673.632623e-08
0.5140341.656593.547732e-08
0.5165191.6562173.462430e-08
0.5190161.6558483.376716e-08
0.5215251.6554843.290588e-08
0.5240461.6551243.204043e-08
0.5265791.6547683.117080e-08
0.5291251.6544173.029697e-08
0.5316831.6540692.941891e-08
0.5342531.6537262.853661e-08
0.5368351.6533872.765004e-08
0.5394311.6530512.675919e-08
0.5420381.6527192.586403e-08
0.5446581.6523912.496454e-08
0.5461.6522252.450400e-08
0.5472911.6520672.449086e-08
0.5499371.6517472.446394e-08
0.5525951.651432.443688e-08
0.5552671.6511162.440970e-08
0.5579511.6508062.438238e-08
0.5606481.65052.435493e-08
0.5633581.6501972.432735e-08
0.5660821.6498972.429964e-08
0.5688181.6496012.427179e-08
0.5715681.6493072.424381e-08
0.5743311.6490172.421569e-08
0.5771071.6487312.418744e-08
0.5798971.6484472.415905e-08
0.581.6484372.415800e-08
0.58271.6481662.467604e-08
0.5855171.6478892.521644e-08
0.5883471.6476142.575946e-08
0.5911921.6473422.630510e-08
0.5940491.6470732.685339e-08
0.5969211.6468072.740432e-08
0.5998071.6465442.795791e-08
0.6027061.6462842.851418e-08
0.605621.6460262.907314e-08
0.6085471.6457712.963481e-08
0.6114891.6455193.019918e-08
0.6144451.6452693.076629e-08
0.6174151.6450223.133613e-08
0.621.644813.183200e-08
0.62041.6447773.185253e-08
0.6233991.6445353.200646e-08
0.6264131.6442953.216113e-08
0.6294411.6440583.231655e-08
0.6324831.6438233.247271e-08
0.6355411.6435913.262964e-08
0.6386131.643363.278732e-08
0.64171.6431333.294577e-08
0.6448021.6429073.310498e-08
0.6479191.6426843.326496e-08
0.6510511.6424623.342572e-08
0.6541991.6422433.358725e-08
0.6573611.6420273.374956e-08
0.661.6418483.388500e-08
0.6605391.6418123.382129e-08
0.6637321.6415993.344379e-08
0.666941.6413883.306446e-08
0.6701651.641183.268330e-08
0.6734041.6409733.230029e-08
0.6766591.6407693.191544e-08
0.679931.6405663.152872e-08
0.6832171.6403653.114014e-08
0.686521.6401663.074967e-08
0.6898391.6399693.035732e-08
0.6931731.6397742.996307e-08
0.6965241.639582.956692e-08
0.6998911.6393892.916885e-08
0.71.6393832.915600e-08
0.7032751.6391992.898300e-08
0.7066741.6390112.880339e-08
0.710091.6388242.862292e-08
0.7135231.6386392.844157e-08
0.7169721.6384562.825934e-08
0.7204381.6382752.807624e-08
0.7239211.6380952.789225e-08
0.727421.6379172.770737e-08
0.7309371.637742.752159e-08
0.734471.6375652.733492e-08
0.7380211.6373912.714735e-08
0.7415881.6372192.695887e-08
0.7451731.6370482.676948e-08
0.7487751.6368792.657917e-08
0.7523951.6367112.638794e-08
0.7560321.6365452.619579e-08
0.7596871.636382.600271e-08
0.7633591.6362162.580869e-08
0.7670491.6360542.561374e-08
0.7707571.6358932.541785e-08
0.7744831.6357332.522101e-08
0.7782271.6355752.502321e-08
0.7819891.6354182.482446e-08
0.7857691.6352622.462476e-08
0.7895681.6351082.442408e-08
0.7933851.6349542.422243e-08
0.797221.6348022.401981e-08
0.8010741.6346512.381622e-08
0.8049461.6345022.361163e-08
0.8088371.6343532.340606e-08
0.8127471.6342062.319949e-08
0.8166761.6340592.299193e-08
0.8206241.6339142.278336e-08
0.8245911.633772.257378e-08
0.8285771.6336272.236319e-08
0.8325831.6334842.215159e-08
0.8366071.6333432.193895e-08
0.8406521.6332032.172530e-08
0.8447151.6330642.151060e-08
0.8487991.6329262.129488e-08
0.8529021.6327892.107810e-08
0.8570251.6326532.086028e-08
0.8611681.6325182.064141e-08
0.8653311.6323842.042148e-08
0.8695141.632252.020049e-08
0.8737171.6321181.997842e-08
0.8779411.6319861.975529e-08
0.8821851.6318551.953107e-08
0.8864491.6317251.930577e-08
0.8907351.6315961.907939e-08
0.895041.6314681.885190e-08
0.8993671.6313411.862332e-08
0.9037151.6312141.839364e-08
0.9080831.6310881.816284e-08
0.9124731.6309631.793093e-08
0.9168841.6308391.769789e-08
0.9213161.6307151.746373e-08
0.925771.6305921.722844e-08
0.9302451.630471.699201e-08
0.9347421.6303481.675444e-08
0.9392611.6302271.651572e-08
0.9438011.6301071.627584e-08
0.9483641.6299881.603481e-08
0.9529481.6298691.579261e-08
0.9575551.629751.554924e-08
0.9621841.6296331.530469e-08
0.9668351.6295161.505896e-08
0.9715091.6293991.481205e-08
0.9762051.6292831.456394e-08
0.9809241.6291681.431463e-08
0.9856661.6290531.406411e-08
0.9904311.6289391.381239e-08
0.9952191.6288251.355944e-08
1.000031.6287121.330528e-08
1.004861.6285991.304988e-08
1.009721.6284871.279325e-08
1.01461.6283751.253538e-08
1.019511.6282641.227627e-08
1.024441.6281531.201590e-08
1.029391.6280431.175427e-08
1.034361.6279331.149138e-08
1.039361.6278231.122722e-08
1.044391.6277141.096178e-08
1.049441.6276051.069505e-08
1.054511.6274971.042704e-08
1.059611.6273891.015773e-08
1.061.6273811.013700e-08
1.064731.6272811.082548e-08
1.069881.6271741.157470e-08
1.075051.6270671.232753e-08
1.080251.6269611.308401e-08
1.085471.6268541.384414e-08
1.090711.6267481.460795e-08
1.095991.6266431.537545e-08
1.101291.6265371.614666e-08
1.106611.6264321.692159e-08
1.111961.6263271.770028e-08
1.117331.6262231.848273e-08
1.122741.6261181.926896e-08
1.128161.6260142.005899e-08
1.133621.625912.085284e-08
1.13911.6258072.165052e-08
1.14461.6257032.245207e-08
1.150141.62562.325749e-08
1.15571.6254972.406680e-08
1.161281.6253942.488002e-08
1.16691.6252912.569718e-08
1.172541.6251882.651828e-08
1.17821.6250862.734336e-08
1.18391.6249832.817242e-08
1.189621.6248812.900549e-08
1.195371.6247792.984259e-08
1.201151.6246773.068373e-08
1.206961.6245753.152895e-08
1.212791.6244733.237824e-08
1.218661.6243713.323164e-08
1.224551.6242693.408917e-08
1.230471.6241673.495084e-08
1.236421.6240653.581668e-08
1.242391.6239643.668671e-08
1.24841.6238623.756094e-08
1.254431.623763.843939e-08
1.26051.6236583.932209e-08
1.266591.6235574.020906e-08
1.272711.6234554.110032e-08
1.278871.6233534.199589e-08
1.285051.6232514.289578e-08
1.291261.6231494.380003e-08
1.29751.6230474.470864e-08
1.303771.6229454.562165e-08
1.310081.6228434.653907e-08
1.316411.622744.746093e-08
1.322771.6226384.838724e-08
1.329171.6225354.931803e-08
1.335591.6224335.025332e-08
1.342051.622335.119313e-08
1.348541.6222275.213749e-08
1.355061.6221245.308641e-08
1.361611.622025.403992e-08
1.368191.6219175.499803e-08
1.37481.6218135.596078e-08
1.381451.6217095.692818e-08
1.388131.6216055.790026e-08
1.394841.62155.887704e-08
1.401581.6213965.985854e-08
1.408351.6212916.084478e-08
1.415161.6211866.183579e-08
1.4221.621086.283159e-08
1.428881.6209746.383221e-08
1.435781.6208686.483766e-08
1.442731.6207626.584798e-08
1.44971.6206556.686317e-08
1.456711.6205486.788328e-08
1.463751.6204416.890832e-08
1.470831.6203336.993831e-08
1.477941.6202257.097328e-08
1.485081.6201177.201325e-08
1.492261.6200087.305825e-08
1.499471.6198997.410830e-08
1.506721.6197897.516343e-08
1.5141.6196797.622366e-08
1.521321.6195697.728901e-08
1.528681.6194587.835952e-08
1.531.6194387.855200e-08
1.536071.6193478.374404e-08
1.543491.6192359.009818e-08
1.550951.6191229.648303e-08
1.558451.619011.028987e-07
1.565991.6188961.093455e-07
1.573561.6187831.158234e-07
1.581161.6186681.223326e-07
1.588811.6185531.288733e-07
1.596491.6184381.354456e-07
1.60421.6183221.420496e-07
1.611961.6182061.486856e-07
1.619751.6180881.553537e-07
1.627581.6179711.620540e-07
1.635451.6178521.687867e-07
1.643351.6177341.755519e-07
1.65131.6176141.823499e-07
1.659281.6174941.891807e-07
1.66731.6173731.960445e-07
1.675361.6172512.029415e-07
1.683461.6171292.098719e-07
1.69161.6170062.168357e-07
1.699781.6168832.238332e-07
1.707991.6167582.308646e-07
1.716251.6166332.379299e-07
1.724551.6165072.450294e-07
1.732881.6163812.521632e-07
1.741261.6162542.593315e-07
1.749681.6161252.665344e-07
1.758131.6159962.737722e-07
1.766631.6158672.810449e-07
1.775171.6157362.883528e-07
1.783761.6156052.956961e-07
1.792381.6154723.030748e-07
1.801041.6153393.104892e-07
1.809751.6152053.179394e-07
1.81851.615073.254257e-07
1.827291.6149343.329481e-07
1.836121.6147973.405070e-07
1.8451.614663.481023e-07
1.853921.6145213.557344e-07
1.862881.6143813.634033e-07
1.871881.6142413.711094e-07
1.880931.6140993.788526e-07
1.890021.6139563.866334e-07
1.899161.6138123.944517e-07
1.908341.6136684.023078e-07
1.917571.6135224.102019e-07
1.926841.6133754.181342e-07
1.936151.6132274.261048e-07
1.945511.6130784.341139e-07
1.954921.6129274.421618e-07
1.964371.6127764.502485e-07
1.971.6126854.550700e-07
1.973861.6126234.722121e-07
1.98341.6124695.145704e-07
1.992991.6123145.571335e-07
2.002631.6121585.999023e-07
2.012311.6120016.428779e-07
2.022031.6118426.860612e-07
2.031811.6116827.294532e-07
2.041631.6115217.730551e-07
2.05151.6113588.168677e-07
2.061421.6111948.608921e-07
2.071381.6110299.051293e-07
2.08141.6108629.495803e-07
2.091461.6106949.942463e-07
2.101571.6105251.039128e-06
2.111731.6103541.084227e-06
2.121931.6101821.129544e-06
2.132191.6100081.175080e-06
2.14251.6098331.220836e-06
2.152861.6096561.266813e-06
2.163261.6094781.313012e-06
2.173721.6092981.359435e-06
2.184231.6091161.406082e-06
2.194791.6089331.452955e-06
2.20541.6087491.500054e-06
2.216061.6085631.547381e-06
2.226771.6083751.594937e-06
2.237541.6081851.642723e-06
2.248351.6079941.690739e-06
2.259221.6078011.738988e-06
2.270141.6076071.787470e-06
2.281121.607411.836186e-06
2.292141.6072121.885138e-06
2.303221.6070121.934327e-06
2.314361.606811.983753e-06
2.3251.6066162.031000e-06
2.325541.6066062.034598e-06
2.336791.6064012.108852e-06
2.348081.6061932.183465e-06
2.359431.6059842.258439e-06
2.370841.6057722.333775e-06
2.38231.6055592.409475e-06
2.393821.6053442.485542e-06
2.405391.6051262.561976e-06
2.417021.6049072.638779e-06
2.42871.6046852.715954e-06
2.440441.6044612.793502e-06
2.452241.6042352.871424e-06
2.464091.6040072.949724e-06
2.4761.6037773.028401e-06
2.487971.6035453.107460e-06
2.51.603313.186900e-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
—