Optical constants

Refractive index of N-F2 (SCHOTT)

N-F2: 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
1.62005
Extinction coefficient k
1.38949e-08
Permittivity ε1
2.62456
Permittivity ε2
4.50208e-08
Absorption coefficient α
0.00297155 cm⁻¹
Penetration depth δ = λ/(2πk)
6.73050e+09 nm
Abbe number Vd
36.431
Chromatic dispersion dn/dλ
-0.086183 µm⁻¹
Group index ng
1.67069
Group velocity dispersion
167.395 fs²/mm
Dispersion parameter D
-913.229 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-F2 (SCHOTT): N-F2
schott_n_f2 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-F2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_f2.range_nm)  # (365, 2500) nm
eps = schott_n_f2.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=1.39757037λ2λ2−0.00995906143+0.159201403λ2λ2−0.0546931752+1.2686543λ2λ2−119.248346

Valid from 0.365 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.39757037
C30.00995906143
C40.159201403
C50.0546931752
C61.2686543
C7119.248346

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 4.62e-07 1.17e-08 -2.35e-11 7.47e-07 9.81e-10 0.263
nd
1.62005
Vd
36.43
glass code
620364.265
glass status
standard
density
value: 2651
thermal expansion
value: 7.84e-06, temperature range: 243 343; value: 9.06e-06, temperature range: 293 573
dPgF
0.0056
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 = 1.35e-06 K⁻¹ at 633 nm, dn/dT = 4.45e-07 K⁻¹ at 1310 nm, dn/dT = 3.78e-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 418 wavelengths, the same grid as the API and the library
N-F2 (SCHOTT), N-F2: n and k versus wavelength
λ (µm)nk
0.3651.6670763.739800e-06
0.3667641.6661833.181709e-06
0.3685371.6653052.620919e-06
0.371.6645952.158300e-06
0.3703191.6644422.115439e-06
0.3721091.6635941.874872e-06
0.3739081.6627611.633142e-06
0.3757151.6619421.390243e-06
0.3775321.6611361.146170e-06
0.3793571.6603439.009168e-07
0.381.6600688.144600e-07
0.381191.6595647.600157e-07
0.3830331.6587976.757433e-07
0.3848851.6580435.910636e-07
0.3867451.65735.059746e-07
0.3886151.656574.204742e-07
0.391.6560383.571300e-07
0.3904941.6558513.482558e-07
0.3923811.6551433.143116e-07
0.3942781.6544462.802033e-07
0.3961841.653762.459302e-07
0.3980991.6530852.114914e-07
0.41.6524271.773100e-07
0.4000241.6524191.771144e-07
0.4019571.6517641.610721e-07
0.40391.6511191.449522e-07
0.4051.6507591.358300e-07
0.4058531.6504831.320059e-07
0.4078151.6498571.232091e-07
0.4097861.649241.143698e-07
0.4117671.6486311.054879e-07
0.4137581.6480329.656292e-08
0.4157581.6474428.759485e-08
0.4177681.6468597.858343e-08
0.4197871.6462866.952844e-08
0.421.6462266.857400e-08
0.4218161.645726.672920e-08
0.4238561.6451626.465825e-08
0.4259041.6446126.257729e-08
0.4279631.644076.048626e-08
0.4300321.6435355.838513e-08
0.4321111.6430085.627384e-08
0.43421.6424885.415235e-08
0.4361.6420475.232400e-08
0.4362991.6419755.217157e-08
0.4384081.6414685.109540e-08
0.4405271.6409695.001403e-08
0.4426571.6404774.892743e-08
0.4447971.6399914.783558e-08
0.4469471.6395114.673845e-08
0.4491071.6390384.563602e-08
0.4512781.6385714.452826e-08
0.453461.638114.341514e-08
0.4556521.6376554.229664e-08
0.4578551.6372064.117274e-08
0.461.6367764.007800e-08
0.4600681.6367634.005358e-08
0.4622921.6363253.925255e-08
0.4645271.6358933.844765e-08
0.4667721.6354673.763885e-08
0.4690291.6350453.682615e-08
0.4712961.634633.600952e-08
0.4735741.6342193.518894e-08
0.4758631.6338143.436439e-08
0.4781641.6334133.353586e-08
0.4804751.6330183.270332e-08
0.4827981.6326273.186676e-08
0.4851321.6322413.102616e-08
0.4874771.631863.018149e-08
0.4898331.6314842.933274e-08
0.4922011.6311122.847988e-08
0.4945811.6307442.762290e-08
0.4969721.6303812.676178e-08
0.4993741.6300232.589650e-08
0.51.629932.567100e-08
0.5017881.6296682.521582e-08
0.5042141.6293182.459827e-08
0.5066511.6289722.397774e-08
0.50911.628632.335421e-08
0.5115611.6282922.272766e-08
0.5140341.6279582.209809e-08
0.5165191.6276282.146547e-08
0.5190161.6273022.082979e-08
0.5215251.6269792.019104e-08
0.5240461.626661.954921e-08
0.5265791.6263451.890427e-08
0.5291251.6260331.825621e-08
0.5316831.6257251.760502e-08
0.5342531.6254211.695068e-08
0.5368351.6251191.629318e-08
0.5394311.6248221.563250e-08
0.5420381.6245271.496863e-08
0.5446581.6242361.430155e-08
0.5461.6240891.396000e-08
0.5472911.6239481.392236e-08
0.5499371.6236631.384525e-08
0.5525951.6233821.376776e-08
0.5552671.6231031.368990e-08
0.5579511.6228281.361167e-08
0.5606481.6225551.353305e-08
0.5633581.6222851.345406e-08
0.5660821.6220191.337468e-08
0.5688181.6217551.329492e-08
0.5715681.6214941.321477e-08
0.5743311.6212361.313424e-08
0.5771071.6209811.305332e-08
0.5798971.6207281.297200e-08
0.581.6207191.296900e-08
0.58271.6204781.329795e-08
0.5855171.620231.364111e-08
0.5883471.6199861.398593e-08
0.5911921.6197431.433241e-08
0.5940491.6195041.468057e-08
0.5969211.6192661.503042e-08
0.5998071.6190311.538195e-08
0.6027061.6187991.573518e-08
0.605621.6185691.609012e-08
0.6085471.6183411.644678e-08
0.6114891.6181161.680516e-08
0.6144451.6178931.716527e-08
0.6174151.6176721.752713e-08
0.621.6174821.784200e-08
0.62041.6174531.787472e-08
0.6233991.6172371.812004e-08
0.6264131.6170231.836655e-08
0.6294411.616811.861425e-08
0.6324831.61661.886315e-08
0.6355411.6163921.911325e-08
0.6386131.6161861.936456e-08
0.64171.6159821.961709e-08
0.6448021.615781.987083e-08
0.6479191.615582.012580e-08
0.6510511.6153822.038201e-08
0.6541991.6151862.063945e-08
0.6573611.6149912.089814e-08
0.661.6148312.111400e-08
0.6605391.6147992.107066e-08
0.6637321.6146082.081386e-08
0.666941.6144192.055581e-08
0.6701651.6142322.029652e-08
0.6734041.6140462.003597e-08
0.6766591.6138631.977416e-08
0.679931.6136811.951109e-08
0.6832171.61351.924675e-08
0.686521.6133221.898113e-08
0.6898391.6131451.871422e-08
0.6931731.6129691.844603e-08
0.6965241.6127951.817653e-08
0.6998911.6126231.790574e-08
0.71.6126171.789700e-08
0.7032751.6124521.785721e-08
0.7066741.6122831.781591e-08
0.710091.6121151.777440e-08
0.7135231.6119481.773269e-08
0.7169721.6117831.769079e-08
0.7204381.611621.764868e-08
0.7239211.6114581.760636e-08
0.727421.6112971.756384e-08
0.7309371.6111381.752112e-08
0.734471.610981.747819e-08
0.7380211.6108231.743505e-08
0.7415881.6106681.739170e-08
0.7451731.6105141.734815e-08
0.7487751.6103611.730438e-08
0.7523951.6102091.726040e-08
0.7560321.6100591.721621e-08
0.7596871.609911.717180e-08
0.7633591.6097621.712718e-08
0.7670491.6096151.708235e-08
0.7707571.6094691.703730e-08
0.7744831.6093251.699203e-08
0.7782271.6091821.694654e-08
0.7819891.6090391.690083e-08
0.7857691.6088981.685490e-08
0.7895681.6087581.680875e-08
0.7933851.6086191.676238e-08
0.797221.6084811.671578e-08
0.8010741.6083441.666895e-08
0.8049461.6082091.662190e-08
0.8088371.6080741.657463e-08
0.8127471.607941.652712e-08
0.8166761.6078071.647938e-08
0.8206241.6076751.643142e-08
0.8245911.6075441.638322e-08
0.8285771.6074131.633479e-08
0.8325831.6072841.628612e-08
0.8366071.6071561.623722e-08
0.8406521.6070281.618808e-08
0.8447151.6069021.613871e-08
0.8487991.6067761.608909e-08
0.8529021.6066511.603924e-08
0.8570251.6065271.598915e-08
0.8611681.6064031.593881e-08
0.8653311.6062811.588823e-08
0.8695141.6061591.583741e-08
0.8737171.6060381.578634e-08
0.8779411.6059181.573502e-08
0.8821851.6057981.568345e-08
0.8864491.6056791.563164e-08
0.8907351.6055611.557957e-08
0.895041.6054441.552726e-08
0.8993671.6053271.547469e-08
0.9037151.6052111.542187e-08
0.9080831.6050961.536879e-08
0.9124731.6049811.531545e-08
0.9168841.6048671.526186e-08
0.9213161.6047531.520801e-08
0.925771.604641.515389e-08
0.9302451.6045281.509952e-08
0.9347421.6044161.504488e-08
0.9392611.6043051.498998e-08
0.9438011.6041951.493481e-08
0.9483641.6040851.487938e-08
0.9529481.6039751.482368e-08
0.9575551.6038661.476771e-08
0.9621841.6037581.471147e-08
0.9668351.603651.465496e-08
0.9715091.6035421.459817e-08
0.9762051.6034351.454111e-08
0.9809241.6033291.448377e-08
0.9856661.6032231.442616e-08
0.9904311.6031171.436827e-08
0.9952191.6030121.431010e-08
1.000031.6029071.425164e-08
1.004861.6028031.419291e-08
1.009721.6026991.413389e-08
1.01461.6025951.407458e-08
1.019511.6024921.401499e-08
1.024441.6023891.395511e-08
1.029391.6022861.389494e-08
1.034361.6021841.383448e-08
1.039361.6020821.377373e-08
1.044391.6019811.371268e-08
1.049441.601881.365134e-08
1.054511.6017791.358970e-08
1.059611.6016781.352777e-08
1.061.6016711.352300e-08
1.064731.6015781.452729e-08
1.069881.6014781.562017e-08
1.075051.6013781.671833e-08
1.080251.6012791.782180e-08
1.085471.6011791.893061e-08
1.090711.601082.004478e-08
1.095991.6009812.116433e-08
1.101291.6008832.228929e-08
1.106611.6007842.341969e-08
1.111961.6006862.455556e-08
1.117331.6005882.569692e-08
1.122741.600492.684379e-08
1.128161.6003922.799621e-08
1.133621.6002952.915420e-08
1.13911.6001973.031779e-08
1.14461.60013.148700e-08
1.150141.6000033.266186e-08
1.15571.5999063.384241e-08
1.161281.5998093.502866e-08
1.16691.5997123.622064e-08
1.172541.5996153.741839e-08
1.17821.5995183.862192e-08
1.18391.5994213.983128e-08
1.189621.5993254.104648e-08
1.195371.5992284.226756e-08
1.201151.5991314.349453e-08
1.206961.5990354.472744e-08
1.212791.5989384.596631e-08
1.218661.5988424.721117e-08
1.224551.5987454.846205e-08
1.230471.5986494.971897e-08
1.236421.5985525.098197e-08
1.242391.5984555.225107e-08
1.24841.5983595.352631e-08
1.254431.5982625.480772e-08
1.26051.5981655.609531e-08
1.266591.5980685.738914e-08
1.272711.5979715.868921e-08
1.278871.5978745.999558e-08
1.285051.5977776.130825e-08
1.291261.5976796.262727e-08
1.29751.5975826.395267e-08
1.303771.5974846.528448e-08
1.310081.5973866.662272e-08
1.316411.5972886.796744e-08
1.322771.597196.931865e-08
1.329171.5970927.067639e-08
1.335591.5969937.204070e-08
1.342051.5968957.341161e-08
1.348541.5967967.478914e-08
1.355061.5966977.617333e-08
1.361611.5965977.756421e-08
1.368191.5964987.896181e-08
1.37481.5963988.036617e-08
1.381451.5962988.177732e-08
1.388131.5961988.319529e-08
1.394841.5960978.462012e-08
1.401581.5959968.605183e-08
1.408351.5958958.749047e-08
1.415161.5957938.893606e-08
1.4221.5956919.038864e-08
1.428881.5955899.184823e-08
1.435781.5954879.331489e-08
1.442731.5953849.478863e-08
1.44971.5952819.626950e-08
1.456711.5951779.775753e-08
1.463751.5950739.925275e-08
1.470831.5949681.007552e-07
1.477941.5948641.022649e-07
1.485081.5947581.037819e-07
1.492261.5946531.053063e-07
1.499471.5945471.068380e-07
1.506721.594441.083771e-07
1.5141.5943331.099237e-07
1.521321.5942251.114777e-07
1.528681.5941171.130392e-07
1.531.5940981.133200e-07
1.536071.5940091.228113e-07
1.543491.59391.344269e-07
1.550951.593791.460986e-07
1.558451.593681.578268e-07
1.565991.593571.696117e-07
1.573561.5934591.814536e-07
1.581161.5933471.933527e-07
1.588811.5932352.053093e-07
1.596491.5931222.173237e-07
1.60421.5930082.293962e-07
1.611961.5928942.415271e-07
1.619751.592782.537166e-07
1.627581.5926642.659650e-07
1.635451.5925482.782726e-07
1.643351.5924322.906398e-07
1.65131.5923143.030667e-07
1.659281.5921963.155537e-07
1.66731.5920783.281010e-07
1.675361.5919583.407090e-07
1.683461.5918383.533780e-07
1.69161.5917173.661082e-07
1.699781.5915963.788999e-07
1.707991.5914733.917535e-07
1.716251.591354.046692e-07
1.724551.5912264.176473e-07
1.732881.5911014.306882e-07
1.741261.5909764.437921e-07
1.749681.5908494.569594e-07
1.758131.5907224.701903e-07
1.766631.5905944.834852e-07
1.775171.5904654.968443e-07
1.783761.5903355.102681e-07
1.792381.5902055.237567e-07
1.801041.5900735.373105e-07
1.809751.589945.509298e-07
1.81851.5898075.646150e-07
1.827291.5896725.783664e-07
1.836121.5895375.921842e-07
1.8451.58946.060688e-07
1.853921.5892636.200205e-07
1.862881.5891256.340397e-07
1.871881.5889856.481266e-07
1.880931.5888456.622816e-07
1.890021.5887036.765051e-07
1.899161.588566.907973e-07
1.908341.5884177.051586e-07
1.917571.5882727.195893e-07
1.926841.5881267.340898e-07
1.936151.5879797.486604e-07
1.945511.587837.633014e-07
1.954921.5876817.780132e-07
1.964371.587537.927961e-07
1.971.587448.016100e-07
1.973861.5873788.288166e-07
1.98341.5872258.960443e-07
1.992991.5870719.635970e-07
2.002631.5869151.031476e-06
2.012311.5867581.099684e-06
2.022031.58661.168221e-06
2.031811.5864411.237089e-06
2.041631.586281.306290e-06
2.05151.5861181.375826e-06
2.061421.5859541.445698e-06
2.071381.5857891.515908e-06
2.08141.5856231.586457e-06
2.091461.5854551.657347e-06
2.101571.5852861.728580e-06
2.111731.5851161.800158e-06
2.121931.5849431.872081e-06
2.132191.584771.944352e-06
2.14251.5845952.016972e-06
2.152861.5844182.089943e-06
2.163261.584242.163267e-06
2.173721.584062.236946e-06
2.184231.5838782.310981e-06
2.194791.5836952.385373e-06
2.20541.583512.460126e-06
2.216061.5833242.535239e-06
2.226771.5831362.610716e-06
2.237541.5829462.686557e-06
2.248351.5827542.762766e-06
2.259221.5825612.839342e-06
2.270141.5823662.916289e-06
2.281121.5821692.993608e-06
2.292141.581973.071300e-06
2.303221.5817693.149368e-06
2.314361.5815673.227814e-06
2.3251.5813723.302800e-06
2.325541.5813623.310700e-06
2.336791.5811563.473733e-06
2.348081.5809483.637554e-06
2.359431.5807373.802166e-06
2.370841.5805253.967575e-06
2.38231.5803114.133783e-06
2.393821.5800944.300794e-06
2.405391.5798764.468613e-06
2.417021.5796554.637243e-06
2.42871.5794324.806688e-06
2.440441.5792074.976952e-06
2.452241.578985.148040e-06
2.464091.5787515.319954e-06
2.4761.5785195.492700e-06
2.487971.5782855.666280e-06
2.51.5780495.840700e-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
—