Optical constants

Refractive index of N-SF14 (SCHOTT)

N-SF14: 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
1.76181
Extinction coefficient k
3.16955e-08
Permittivity ε1
3.10399
Permittivity ε2
1.11683e-07
Absorption coefficient α
0.00677837 cm⁻¹
Penetration depth δ = λ/(2πk)
2.95056e+09 nm
Abbe number Vd
26.53
Chromatic dispersion dn/dλ
-0.143834 µm⁻¹
Group index ng
1.84633
Group velocity dispersion
295.432 fs²/mm
Dispersion parameter D
-1611.74 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-SF14 (SCHOTT): N-SF14
schott_n_sf14 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SF14", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_sf14.range_nm)  # (365, 2500) nm
eps = schott_n_sf14.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=1.69022361λ2λ2−0.0130512113+0.288870052λ2λ2−0.061369188+1.7045187λ2λ2−149.517689

Valid from 0.365 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.69022361
C30.0130512113
C40.288870052
C50.061369188
C61.7045187
C7149.517689

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -5.56e-06 7.09e-09 -1.09e-11 9.85e-07 1.39e-09 0.287
nd
1.76182
Vd
26.53
glass code
762265.312
glass status
standard
density
value: 3118
thermal expansion
value: 9.41e-06, temperature range: 243 343; value: 1.087e-05, temperature range: 293 573
dPgF
0.013
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 = -1.46e-06 K⁻¹ at 633 nm, dn/dT = -2.85e-06 K⁻¹ at 1310 nm, dn/dT = -2.93e-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-SF14 (SCHOTT), N-SF14: n and k versus wavelength
λ (µm)nk
0.3651.8460366.415000e-06
0.3667641.8443235.489023e-06
0.3685371.8426454.558571e-06
0.371.8412923.791000e-06
0.3703191.8410013.712859e-06
0.3721091.8393893.274273e-06
0.3739081.8378082.833566e-06
0.3757151.8362582.390729e-06
0.3775321.8347381.945751e-06
0.3793571.8332471.498622e-06
0.381.832731.341000e-06
0.381191.8317841.254407e-06
0.3830331.8303481.120372e-06
0.3848851.8289399.856897e-07
0.3867451.8275558.503562e-07
0.3886151.8261977.143684e-07
0.391.825216.136200e-07
0.3904941.8248626.014141e-07
0.3923811.8235525.547262e-07
0.3942781.8222645.078127e-07
0.3961841.8214.606724e-07
0.3980991.8197564.133041e-07
0.41.818553.662900e-07
0.4000241.8185353.659958e-07
0.4019571.8173343.418588e-07
0.40391.8161533.176051e-07
0.4051.8154963.038800e-07
0.4058531.8149922.971876e-07
0.4078151.8138512.817931e-07
0.4097861.8127282.663241e-07
0.4117671.8116242.507803e-07
0.4137581.8105372.351615e-07
0.4157581.8094682.194671e-07
0.4177681.8084172.036968e-07
0.4197871.8073821.878503e-07
0.421.8072741.861800e-07
0.4218161.8063631.799031e-07
0.4238561.805361.728568e-07
0.4259041.8043731.657764e-07
0.4279631.8034011.586618e-07
0.4300321.8024441.515128e-07
0.4321111.8015021.443292e-07
0.43421.8005731.371109e-07
0.4361.7997881.308900e-07
0.4362991.7996591.305834e-07
0.4384081.7987591.284190e-07
0.4405271.7978721.262440e-07
0.4426571.7969981.240586e-07
0.4447971.7961371.218626e-07
0.4469471.7952881.196560e-07
0.4491071.7944521.174387e-07
0.4512781.7936281.152107e-07
0.453461.7928151.129719e-07
0.4556521.7920151.107223e-07
0.4578551.7912251.084618e-07
0.461.7904711.062600e-07
0.4600681.7904471.061900e-07
0.4622921.789681.038943e-07
0.4645271.7889231.015875e-07
0.4667721.7881779.926948e-08
0.4690291.7874419.694030e-08
0.4712961.7867159.459986e-08
0.4735741.7869.224811e-08
0.4758631.7852948.988499e-08
0.4781641.7845978.751044e-08
0.4804751.783918.512442e-08
0.4827981.7832328.272686e-08
0.4851321.7825638.031771e-08
0.4874771.7819037.789691e-08
0.4898331.7812527.546442e-08
0.4922011.7806097.302016e-08
0.4945811.7799757.056409e-08
0.4969721.7793496.809615e-08
0.4993741.7787316.561627e-08
0.51.7785726.497000e-08
0.5017881.7781216.374056e-08
0.5042141.7775196.207259e-08
0.5066511.7769256.039656e-08
0.50911.7763385.871242e-08
0.5115611.7757595.702014e-08
0.5140341.7751875.531968e-08
0.5165191.7746225.361101e-08
0.5190161.7740645.189407e-08
0.5215251.7735135.016883e-08
0.5240461.7729694.843525e-08
0.5265791.7724324.669329e-08
0.5291251.7719024.494291e-08
0.5316831.7713774.318407e-08
0.5342531.770864.141673e-08
0.5368351.7703483.964084e-08
0.5394311.7698433.785637e-08
0.5420381.7693443.606327e-08
0.5446581.7688513.426151e-08
0.5461.7686023.333900e-08
0.5472911.7683643.320375e-08
0.5499371.7678833.292666e-08
0.5525951.7674073.264823e-08
0.5552671.7669373.236845e-08
0.5579511.7664733.208732e-08
0.5606481.7660143.180483e-08
0.5633581.765563.152097e-08
0.5660821.7651123.123575e-08
0.5688181.7646693.094914e-08
0.5715681.7642313.066115e-08
0.5743311.7637983.037176e-08
0.5771071.763373.008098e-08
0.5798971.7629472.978879e-08
0.581.7629322.977800e-08
0.58271.7625293.045926e-08
0.5855171.7621163.116995e-08
0.5883471.7617073.188406e-08
0.5911921.7613033.260164e-08
0.5940491.7609043.332267e-08
0.5969211.7605093.404720e-08
0.5998071.7601183.477523e-08
0.6027061.7597323.550677e-08
0.605621.759353.624186e-08
0.6085471.7589723.698049e-08
0.6114891.7585993.772270e-08
0.6144451.7582293.846849e-08
0.6174151.7578643.921789e-08
0.621.757553.987000e-08
0.62041.7575023.993865e-08
0.6233991.7571454.045336e-08
0.6264131.7567914.097056e-08
0.6294411.7564414.149026e-08
0.6324831.7560954.201248e-08
0.6355411.7557534.253722e-08
0.6386131.7554144.306449e-08
0.64171.7550794.359432e-08
0.6448021.7547474.412670e-08
0.6479191.7544194.466166e-08
0.6510511.7540954.519921e-08
0.6541991.7537744.573935e-08
0.6573611.7534564.628210e-08
0.661.7531944.673500e-08
0.6605391.7531414.655907e-08
0.6637321.752834.551661e-08
0.666941.7525224.446910e-08
0.6701651.7522174.341654e-08
0.6734041.7519154.235888e-08
0.6766591.7516174.129611e-08
0.679931.7513214.022820e-08
0.6832171.7510283.915513e-08
0.686521.7507393.807688e-08
0.6898391.7504523.699341e-08
0.6931731.7501683.590470e-08
0.6965241.7498873.481073e-08
0.6998911.7496093.371147e-08
0.71.74963.367600e-08
0.7032751.7493333.343112e-08
0.7066741.749063.317689e-08
0.710091.748793.292143e-08
0.7135231.7485233.266473e-08
0.7169721.7482583.240680e-08
0.7204381.7479963.214761e-08
0.7239211.7477363.188718e-08
0.727421.7474793.162548e-08
0.7309371.7472243.136252e-08
0.734471.7469723.109829e-08
0.7380211.7467223.083278e-08
0.7415881.7464743.056599e-08
0.7451731.7462293.029791e-08
0.7487751.7459863.002853e-08
0.7523951.7457452.975785e-08
0.7560321.7455072.948587e-08
0.7596871.745272.921256e-08
0.7633591.7450362.893794e-08
0.7670491.7448042.866199e-08
0.7707571.7445752.838470e-08
0.7744831.7443472.810608e-08
0.7782271.7441212.782611e-08
0.7819891.7438982.754478e-08
0.7857691.7436762.726209e-08
0.7895681.7434562.697804e-08
0.7933851.7432382.669261e-08
0.797221.7430232.640581e-08
0.8010741.7428092.611762e-08
0.8049461.7425972.582803e-08
0.8088371.7423862.553705e-08
0.8127471.7421782.524466e-08
0.8166761.7419712.495085e-08
0.8206241.7417672.465563e-08
0.8245911.7415632.435897e-08
0.8285771.7413622.406089e-08
0.8325831.7411622.376136e-08
0.8366071.7409642.346038e-08
0.8406521.7407682.315795e-08
0.8447151.7405732.285406e-08
0.8487991.740382.254870e-08
0.8529021.7401882.224186e-08
0.8570251.7399982.193354e-08
0.8611681.7398092.162373e-08
0.8653311.7396222.131242e-08
0.8695141.7394372.099961e-08
0.8737171.7392522.068528e-08
0.8779411.739072.036944e-08
0.8821851.7388882.005206e-08
0.8864491.7387081.973316e-08
0.8907351.738531.941271e-08
0.895041.7383531.909071e-08
0.8993671.7381771.876716e-08
0.9037151.7380021.844204e-08
0.9080831.7378291.811535e-08
0.9124731.7376571.778708e-08
0.9168841.7374861.745723e-08
0.9213161.7373161.712578e-08
0.925771.7371481.679273e-08
0.9302451.7369811.645806e-08
0.9347421.7368151.612178e-08
0.9392611.736651.578388e-08
0.9438011.7364871.544434e-08
0.9483641.7363241.510316e-08
0.9529481.7361621.476033e-08
0.9575551.7360021.441584e-08
0.9621841.7358431.406969e-08
0.9668351.7356841.372186e-08
0.9715091.7355271.337236e-08
0.9762051.7353711.302116e-08
0.9809241.7352161.266827e-08
0.9856661.7350611.231367e-08
0.9904311.7349081.195735e-08
0.9952191.7347561.159931e-08
1.000031.7346041.123955e-08
1.004861.7344541.087804e-08
1.009721.7343041.051479e-08
1.01461.7341551.014978e-08
1.019511.7340079.783000e-09
1.024441.733869.414452e-09
1.029391.7337149.044123e-09
1.034361.7335688.672003e-09
1.039361.7334248.298085e-09
1.044391.733287.922359e-09
1.049441.7331377.544817e-09
1.054511.7329947.165449e-09
1.059611.7328536.784248e-09
1.061.7328426.754900e-09
1.064731.7327127.677055e-09
1.069881.7325718.680553e-09
1.075051.7324329.688903e-09
1.080251.7322931.070213e-08
1.085471.7321551.172025e-08
1.090711.7320171.274329e-08
1.095991.731881.377128e-08
1.101291.7317441.480424e-08
1.106611.7316081.584219e-08
1.111961.7314731.688516e-08
1.117331.7313381.793317e-08
1.122741.7312041.898625e-08
1.128161.7310712.004442e-08
1.133621.7309382.110770e-08
1.13911.7308052.217612e-08
1.14461.7306732.324971e-08
1.150141.7305422.432849e-08
1.15571.7304112.541248e-08
1.161281.730282.650171e-08
1.16691.730152.759621e-08
1.172541.730022.869600e-08
1.17821.7298912.980111e-08
1.18391.7297623.091156e-08
1.189621.7296343.202737e-08
1.195371.7295063.314858e-08
1.201151.7293783.427521e-08
1.206961.7292513.540729e-08
1.212791.7291243.654484e-08
1.218661.7289973.768788e-08
1.224551.728873.883646e-08
1.230471.7287443.999058e-08
1.236421.7286184.115029e-08
1.242391.7284934.231560e-08
1.24841.7283684.348654e-08
1.254431.7282434.466314e-08
1.26051.7281184.584544e-08
1.266591.7279934.703344e-08
1.272711.7278694.822719e-08
1.278871.7277444.942671e-08
1.285051.727625.063203e-08
1.291261.7274975.184318e-08
1.29751.7273735.306018e-08
1.303771.7272495.428307e-08
1.310081.7271265.551186e-08
1.316411.7270035.674660e-08
1.322771.7268795.798730e-08
1.329171.7267565.923400e-08
1.335591.7266336.048673e-08
1.342051.726516.174552e-08
1.348541.7263876.301038e-08
1.355061.7262656.428137e-08
1.361611.7261426.555850e-08
1.368191.7260196.684180e-08
1.37481.7258966.813130e-08
1.381451.7257736.942704e-08
1.388131.725657.072904e-08
1.394841.7255277.203734e-08
1.401581.7254057.335196e-08
1.408351.7252827.467294e-08
1.415161.7251597.600030e-08
1.4221.7250357.733408e-08
1.428881.7249127.867430e-08
1.435781.7247898.002101e-08
1.442731.7246658.137422e-08
1.44971.7245428.273398e-08
1.456711.7244188.410031e-08
1.463751.7242948.547324e-08
1.470831.724178.685281e-08
1.477941.7240468.823905e-08
1.485081.7239218.963199e-08
1.492261.7237979.103167e-08
1.499471.7236729.243811e-08
1.506721.7235479.385135e-08
1.5141.7234219.527142e-08
1.521321.7232969.669836e-08
1.528681.723179.813219e-08
1.531.7231479.839000e-08
1.536071.7230441.080871e-07
1.543491.7229171.199547e-07
1.550951.722791.318797e-07
1.558451.7226631.438623e-07
1.565991.7225361.559028e-07
1.573561.7224081.680015e-07
1.581161.722281.801587e-07
1.588811.7221511.923747e-07
1.596491.7220222.046497e-07
1.60421.7218932.169841e-07
1.611961.7217632.293781e-07
1.619751.7216332.418320e-07
1.627581.7215022.543461e-07
1.635451.7213712.669207e-07
1.643351.7212392.795561e-07
1.65131.7211072.922526e-07
1.659281.7209753.050104e-07
1.66731.7208423.178299e-07
1.675361.7207083.307114e-07
1.683461.7205743.436552e-07
1.69161.7204393.566615e-07
1.699781.7203043.697307e-07
1.707991.7201683.828631e-07
1.716251.7200323.960590e-07
1.724551.7198954.093186e-07
1.732881.7197574.226424e-07
1.741261.7196194.360306e-07
1.749681.719484.494834e-07
1.758131.719344.630014e-07
1.766631.71924.765846e-07
1.775171.7190594.902335e-07
1.783761.7189175.039484e-07
1.792381.7187745.177296e-07
1.801041.7186315.315775e-07
1.809751.7184875.454922e-07
1.81851.7183425.594743e-07
1.827291.7181975.735239e-07
1.836121.7180515.876414e-07
1.8451.7179036.018272e-07
1.853921.7177556.160815e-07
1.862881.7176076.304048e-07
1.871881.7174576.447973e-07
1.880931.7173066.592594e-07
1.890021.7171556.737914e-07
1.899161.7170026.883936e-07
1.908341.7168497.030664e-07
1.917571.7166957.178102e-07
1.926841.716547.326252e-07
1.936151.7163837.475119e-07
1.945511.7162267.624705e-07
1.954921.7160687.775014e-07
1.964371.7159097.926050e-07
1.971.7158148.016100e-07
1.973861.7157488.288166e-07
1.98341.7155878.960443e-07
1.992991.7154259.635970e-07
2.002631.7152611.031476e-06
2.012311.7150961.099684e-06
2.022031.7149311.168221e-06
2.031811.7147641.237089e-06
2.041631.7145961.306290e-06
2.05151.7144261.375826e-06
2.061421.7142561.445698e-06
2.071381.7140841.515908e-06
2.08141.7139111.586457e-06
2.091461.7137371.657347e-06
2.101571.7135611.728580e-06
2.111731.7133841.800158e-06
2.121931.7132061.872081e-06
2.132191.7130261.944352e-06
2.14251.7128462.016972e-06
2.152861.7126632.089943e-06
2.163261.712482.163267e-06
2.173721.7122942.236946e-06
2.184231.7121082.310981e-06
2.194791.711922.385373e-06
2.20541.711732.460126e-06
2.216061.7115392.535239e-06
2.226771.7113472.610716e-06
2.237541.7111532.686557e-06
2.248351.7109572.762766e-06
2.259221.710762.839342e-06
2.270141.7105612.916289e-06
2.281121.710362.993608e-06
2.292141.7101583.071300e-06
2.303221.7099543.149368e-06
2.314361.7097483.227814e-06
2.3251.7095513.302800e-06
2.325541.7095413.306443e-06
2.336791.7093323.381629e-06
2.348081.7091213.457178e-06
2.359431.7089083.533092e-06
2.370841.7086943.609373e-06
2.38231.7084773.686023e-06
2.393821.7082593.763044e-06
2.405391.7080393.840436e-06
2.417021.7078173.918203e-06
2.42871.7075933.996346e-06
2.440441.7073664.074867e-06
2.452241.7071384.153767e-06
2.464091.7069084.233048e-06
2.4761.7066764.312713e-06
2.487971.7064424.392763e-06
2.51.7062054.473200e-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
—