Optical constants

Refractive index of SF14 (SCHOTT)

SF14: n,k 0.39–2.5 µm

Data
formula 2 + tabulated k
Range
0.39–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.39–2.5 µm
Refractive index n
1.76181
Extinction coefficient k
1.87982e-08
Permittivity ε1
3.10399
Permittivity ε2
6.62379e-08
Absorption coefficient α
0.00402017 cm⁻¹
Penetration depth δ = λ/(2πk)
4.97491e+09 nm
Abbe number Vd
26.527
Chromatic dispersion dn/dλ
-0.143799 µm⁻¹
Group index ng
1.84631
Group velocity dispersion
296.624 fs²/mm
Dispersion parameter D
-1618.24 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

# SF14 (SCHOTT): SF14
schott_sf14 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "SF14", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_sf14.range_nm)  # (390, 2500) nm
eps = schott_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=1.69182538λ2λ2−0.0133151542+0.285919934λ2λ2−0.0612647445+1.12595145λ2λ2−118.405242

Valid from 0.39 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.69182538
C30.0133151542
C40.285919934
C50.0612647445
C61.12595145
C7118.405242

Comments and conditions

was replaced by N-SF14

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 8.85e-06 1.81e-08 -4.12e-11 1.39e-06 1.53e-09 0.279
nd
1.76182
Vd
26.53
glass code
762265.454
glass status
preferred
density
value: 4540
thermal expansion
value: 6.6e-06, temperature range: 243 343; value: 7.4e-06, temperature range: 293 573
dPgF
0.0134
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 = 7.80e-06 K⁻¹ at 633 nm, dn/dT = 5.57e-06 K⁻¹ at 1310 nm, dn/dT = 5.40e-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 415 wavelengths, the same grid as the API and the library
SF14 (SCHOTT), SF14: n and k versus wavelength
λ (µm)nk
0.391.8252273.995900e-06
0.391821.8239573.563578e-06
0.3936491.8227083.129238e-06
0.3954861.821482.692871e-06
0.3973321.8202732.254468e-06
0.3991861.8190861.814018e-06
0.41.8185731.620800e-06
0.401051.8179181.521845e-06
0.4029211.8167691.345372e-06
0.4048021.8156391.168075e-06
0.4051.8155221.149400e-06
0.4066911.8145271.065194e-06
0.4085891.8134339.706860e-07
0.4104961.8123568.757371e-07
0.4124121.8112967.803450e-07
0.4143371.8102526.845078e-07
0.4162711.8092255.882232e-07
0.4182141.8082134.914892e-07
0.421.8073014.025500e-07
0.4201661.8072174.003837e-07
0.4221271.8062363.747336e-07
0.4240971.805273.489638e-07
0.4260761.8043183.230737e-07
0.4280651.803382.970628e-07
0.4300631.8024572.709305e-07
0.432071.8015462.446762e-07
0.4340861.8006492.182993e-07
0.4361.7998141.932700e-07
0.4361121.7997651.927890e-07
0.4381481.7988941.840816e-07
0.4401931.7980351.753335e-07
0.4422471.7971891.665445e-07
0.4443111.7963541.577146e-07
0.4463851.7955321.488434e-07
0.4484681.794721.399309e-07
0.4505621.7939211.309767e-07
0.4526641.7931321.219807e-07
0.4547771.7923541.129428e-07
0.45691.7915861.038627e-07
0.4590321.790839.474017e-08
0.461.7904919.060000e-08
0.4611751.7900838.917073e-08
0.4633271.7893478.655167e-08
0.4654891.788628.392038e-08
0.4676621.7879038.127682e-08
0.4698451.7871967.862092e-08
0.4720381.7864987.595262e-08
0.4742411.7858097.327187e-08
0.4764541.7851297.057860e-08
0.4786781.7844586.787277e-08
0.4809121.7837966.515431e-08
0.4831571.7831426.242316e-08
0.4854121.7824975.967926e-08
0.4876771.781865.692256e-08
0.4899531.7812315.415299e-08
0.492241.780615.137049e-08
0.4945371.7799974.857501e-08
0.4968451.7793924.576648e-08
0.4991641.7787944.294484e-08
0.51.7785814.192800e-08
0.5014941.7782044.124769e-08
0.5038351.7776214.018190e-08
0.5061861.7770453.911114e-08
0.5085491.7764773.803538e-08
0.5109221.7759153.695460e-08
0.5133071.775363.586878e-08
0.5157031.7748123.477789e-08
0.5181091.7742713.368191e-08
0.5205281.7737363.258081e-08
0.5229571.7732083.147458e-08
0.5253981.7726863.036318e-08
0.527851.772172.924659e-08
0.5303141.771662.812479e-08
0.5327891.7711572.699776e-08
0.5352751.7706592.586547e-08
0.5377741.7701672.472789e-08
0.5402831.7696812.358500e-08
0.5428051.7692012.243678e-08
0.5453391.7687262.128320e-08
0.5461.7686032.098200e-08
0.5478841.7682572.084753e-08
0.5504411.7677932.066500e-08
0.553011.7673342.048162e-08
0.5555911.7668812.029738e-08
0.5581841.7664332.011228e-08
0.5607891.765991.992631e-08
0.5634071.7655521.973948e-08
0.5660361.7651191.955178e-08
0.5686781.7646911.936320e-08
0.5713321.7642681.917374e-08
0.5739991.763851.898339e-08
0.5766781.7634361.879216e-08
0.5793691.7630271.860003e-08
0.581.7629321.855500e-08
0.5820731.7626221.862134e-08
0.584791.7622221.870828e-08
0.5875191.7618261.879562e-08
0.5902611.7614351.888336e-08
0.5930161.7610471.897152e-08
0.5957841.7606651.906009e-08
0.5985651.7602861.914907e-08
0.6013581.7599111.923847e-08
0.6041651.7595411.932828e-08
0.6069851.7591741.941851e-08
0.6098181.7588111.950917e-08
0.6126641.7584531.960024e-08
0.6155231.7580981.969175e-08
0.6183961.7577471.978368e-08
0.621.7575531.983500e-08
0.6212821.7573991.987600e-08
0.6241821.7570561.996872e-08
0.6270951.7567152.006187e-08
0.6300221.7563792.015546e-08
0.6329631.7560462.024948e-08
0.6359171.7557162.034394e-08
0.6388851.755392.043884e-08
0.6418671.7550682.053418e-08
0.6448621.7547482.062997e-08
0.6478721.7544322.072621e-08
0.6508961.7541192.082289e-08
0.6539341.753812.092003e-08
0.6569861.7535032.101762e-08
0.661.7532052.111400e-08
0.6600521.75322.110981e-08
0.6631331.75292.086205e-08
0.6662281.7526022.061314e-08
0.6693371.7523082.036306e-08
0.6724611.7520172.011182e-08
0.67561.7517281.985940e-08
0.6787531.7514431.960580e-08
0.6819211.751161.935102e-08
0.6851031.750881.909506e-08
0.6883011.7506031.883789e-08
0.6915131.7503291.857953e-08
0.6947411.7500571.831996e-08
0.6979831.7497881.805918e-08
0.71.7496231.789700e-08
0.7012411.7495221.787025e-08
0.7045141.7492581.779970e-08
0.7078021.7489971.772882e-08
0.7111061.7487381.765761e-08
0.7144251.7484821.758607e-08
0.7177591.7482281.751420e-08
0.7211091.7479771.744199e-08
0.7244741.7477281.736944e-08
0.7278561.7474811.729655e-08
0.7312531.7472371.722333e-08
0.7346661.7469951.714976e-08
0.7380951.7467561.707585e-08
0.741541.7465181.700159e-08
0.7451.7462831.692699e-08
0.7484781.746051.685204e-08
0.7519711.7458191.677674e-08
0.7554811.745591.670109e-08
0.7590071.7453631.662508e-08
0.7625491.7451391.654872e-08
0.7661081.7449161.647201e-08
0.7696841.7446961.639493e-08
0.7732761.7444771.631750e-08
0.7768851.744261.623970e-08
0.7805111.7440461.616154e-08
0.7841541.7438331.608302e-08
0.7878141.7436221.600413e-08
0.7914911.7434131.592487e-08
0.7951851.7432061.584524e-08
0.7988961.7430011.576524e-08
0.8026251.7427971.568487e-08
0.8063711.7425951.560412e-08
0.8101341.7423951.552300e-08
0.8139151.7421971.544149e-08
0.8177141.7421.535961e-08
0.821531.7418051.527734e-08
0.8253651.7416121.519469e-08
0.8292171.741421.511166e-08
0.8330871.741231.502823e-08
0.8369751.7410421.494442e-08
0.8408821.7408551.486022e-08
0.8448061.7406691.477562e-08
0.8487491.7404851.469063e-08
0.8527111.7403031.460524e-08
0.856691.7401221.451945e-08
0.8606891.7399431.443327e-08
0.8647061.7397651.434668e-08
0.8687421.7395881.425968e-08
0.8727961.7394131.417228e-08
0.876871.7392391.408447e-08
0.8809621.7390671.399626e-08
0.8850741.7388961.390763e-08
0.8892051.7387261.381858e-08
0.8933551.7385581.372913e-08
0.8975241.7383911.363925e-08
0.9017131.7382251.354895e-08
0.9059221.738061.345824e-08
0.910151.7378971.336710e-08
0.9143981.7377351.327553e-08
0.9186661.7375741.318354e-08
0.9229531.7374141.309112e-08
0.9272611.7372561.299826e-08
0.9315891.7370981.290497e-08
0.9359371.7369421.281125e-08
0.9403051.7367871.271709e-08
0.9446941.7366331.262249e-08
0.9491031.736481.252745e-08
0.9535321.7363281.243197e-08
0.9579831.7361771.233604e-08
0.9624541.7360271.223966e-08
0.9669461.7358781.214283e-08
0.9714591.7357311.204555e-08
0.9759931.7355841.194782e-08
0.9805481.7354381.184963e-08
0.9851251.7352931.175098e-08
0.9897221.7351491.165187e-08
0.9943421.7350061.155230e-08
0.9989831.7348641.145226e-08
1.003651.7347231.135176e-08
1.008331.7345831.125079e-08
1.013041.7344431.114935e-08
1.017761.7343051.104743e-08
1.022511.7341671.094504e-08
1.027291.734031.084217e-08
1.032081.7338941.073882e-08
1.03691.7337591.063498e-08
1.041741.7336241.053067e-08
1.04661.7334911.042586e-08
1.051481.7333581.032057e-08
1.056391.7332251.021479e-08
1.061.7331291.013700e-08
1.061321.7330941.035728e-08
1.066281.7329631.118275e-08
1.071251.7328331.201208e-08
1.076251.7327041.284528e-08
1.081271.7325751.368237e-08
1.086321.7324471.452337e-08
1.091391.732321.536829e-08
1.096491.7321931.621715e-08
1.10161.7320671.706998e-08
1.106741.7319421.792679e-08
1.111911.7318171.878759e-08
1.11711.7316931.965241e-08
1.122311.7315692.052127e-08
1.127551.7314462.139419e-08
1.132811.7313242.227118e-08
1.13811.7312022.315226e-08
1.143411.731082.403745e-08
1.148751.7309592.492678e-08
1.154111.7308392.582026e-08
1.15951.7307192.671790e-08
1.164911.73062.761974e-08
1.170351.7304812.852578e-08
1.175811.7303622.943606e-08
1.18131.7302443.035058e-08
1.186811.7301273.126937e-08
1.192351.7300093.219245e-08
1.197911.7298933.311984e-08
1.20351.7297763.405155e-08
1.209121.729663.498761e-08
1.214761.7295453.592805e-08
1.220431.729433.687287e-08
1.226131.7293153.782210e-08
1.231851.72923.877576e-08
1.23761.7290863.973388e-08
1.243381.7289724.069646e-08
1.249181.7288594.166354e-08
1.255011.7287464.263513e-08
1.260871.7286334.361125e-08
1.266751.728524.459193e-08
1.272671.7284084.557719e-08
1.278611.7282964.656705e-08
1.284571.7281844.756153e-08
1.290571.7280724.856065e-08
1.296591.7279614.956443e-08
1.302641.727855.057289e-08
1.308721.7277395.158607e-08
1.314831.7276285.260397e-08
1.320971.7275175.362662e-08
1.327131.7274075.465405e-08
1.333331.7272975.568627e-08
1.339551.7271875.672330e-08
1.34581.7270775.776518e-08
1.352081.7269675.881192e-08
1.358391.7268575.986355e-08
1.364731.7267486.092009e-08
1.37111.7266386.198155e-08
1.37751.7265296.304797e-08
1.383931.726426.411937e-08
1.390391.7263116.519577e-08
1.396881.7262016.627719e-08
1.40341.7260926.736366e-08
1.409951.7259836.845520e-08
1.416531.7258746.955183e-08
1.423141.7257657.065358e-08
1.429781.7256567.176048e-08
1.436461.7255477.287254e-08
1.443161.7254387.398979e-08
1.44991.7253297.511226e-08
1.456671.725227.623996e-08
1.463461.7251117.737293e-08
1.470291.7250027.851118e-08
1.477161.7248927.965475e-08
1.484051.7247838.080366e-08
1.490981.7246748.195792e-08
1.497941.7245648.311758e-08
1.504931.7244558.428265e-08
1.511951.7243458.545315e-08
1.519011.7242358.662912e-08
1.52611.7241258.781057e-08
1.531.7240648.846100e-08
1.533221.7240159.163967e-08
1.540381.7239049.870449e-08
1.547561.7237941.058023e-07
1.554791.7236831.129332e-07
1.562041.7235721.200974e-07
1.569331.7234611.272951e-07
1.576661.723351.345263e-07
1.584021.7232381.417913e-07
1.591411.7231271.490902e-07
1.598841.7230151.564231e-07
1.60631.7229021.637903e-07
1.61381.722791.711919e-07
1.621331.7226771.786280e-07
1.62891.7225641.860988e-07
1.63651.7224511.936045e-07
1.644141.7223372.011452e-07
1.651811.7222232.087211e-07
1.659521.7221082.163324e-07
1.667271.7219942.239792e-07
1.675051.7218792.316617e-07
1.682861.7217632.393800e-07
1.690721.7216472.471344e-07
1.698611.7215312.549249e-07
1.706541.7214152.627519e-07
1.71451.7212982.706153e-07
1.72251.721182.785155e-07
1.730541.7210622.864525e-07
1.738621.7209442.944265e-07
1.746741.7208253.024378e-07
1.754891.7207063.104865e-07
1.763081.7205863.185727e-07
1.771311.7204663.266967e-07
1.779571.7203453.348586e-07
1.787881.7202243.430586e-07
1.796221.7201023.512968e-07
1.804611.7199793.595735e-07
1.813031.7198563.678889e-07
1.821491.7197333.762430e-07
1.829991.7196093.846362e-07
1.838531.7194843.930685e-07
1.847121.7193594.015401e-07
1.855741.7192334.100513e-07
1.86441.7191064.186023e-07
1.87311.7189794.271931e-07
1.881841.7188514.358240e-07
1.890621.7187234.444953e-07
1.899451.7185944.532069e-07
1.908311.7184644.619593e-07
1.917221.7183334.707525e-07
1.926171.7182024.795867e-07
1.935161.718074.884622e-07
1.944191.7179374.973791e-07
1.953261.7178035.063376e-07
1.962381.7176695.153379e-07
1.971.7175575.228600e-07
1.971541.7175345.325035e-07
1.980741.7173985.901303e-07
1.989991.7172616.480260e-07
1.999271.7171237.061920e-07
2.00861.7169857.646294e-07
2.017981.7168468.233396e-07
2.02741.7167058.823237e-07
2.036861.7165649.415832e-07
2.046371.7164221.001119e-06
2.055921.7162791.060933e-06
2.065511.7161361.121026e-06
2.075151.7159911.181400e-06
2.084841.7158451.242055e-06
2.094571.7156981.302994e-06
2.104351.715551.364216e-06
2.114171.7154021.425725e-06
2.124031.7152521.487521e-06
2.133951.7151011.549605e-06
2.143911.7149491.611979e-06
2.153911.7147961.674644e-06
2.163971.7146421.737601e-06
2.174071.7144871.800852e-06
2.184211.714331.864399e-06
2.194411.7141731.928242e-06
2.204651.7140141.992383e-06
2.214941.7138542.056823e-06
2.225281.7136932.121564e-06
2.235661.7135312.186608e-06
2.24611.7133682.251955e-06
2.256581.7132032.317606e-06
2.267111.7130372.383565e-06
2.277691.7128692.449831e-06
2.288321.7127012.516406e-06
2.2991.7125312.583292e-06
2.309731.712362.650491e-06
2.320511.7121872.718003e-06
2.3251.7121152.746100e-06
2.331341.7120132.793911e-06
2.342221.7118382.875917e-06
2.353161.7116612.958304e-06
2.364141.7114823.041077e-06
2.375171.7113033.124236e-06
2.386261.7111213.207782e-06
2.39741.7109393.291719e-06
2.408591.7107543.376048e-06
2.419831.7105693.460770e-06
2.431121.7103813.545887e-06
2.442471.7101923.631402e-06
2.453871.7100023.717316e-06
2.465321.7098093.803631e-06
2.476831.7096163.890348e-06
2.488391.709423.977471e-06
2.51.7092234.065000e-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
—