Optical constants

Refractive index of N-SSK5 (SCHOTT)

N-SSK5: n,k 0.35–2.5 µm

Data
formula 2 + tabulated k
Range
0.35–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.35–2.5 µm
Refractive index n
1.65844
Extinction coefficient k
1.35168e-08
Permittivity ε1
2.75042
Permittivity ε2
4.48334e-08
Absorption coefficient α
0.00289069 cm⁻¹
Penetration depth δ = λ/(2πk)
6.91877e+09 nm
Abbe number Vd
50.883
Chromatic dispersion dn/dλ
-0.066404 µm⁻¹
Group index ng
1.69746
Group velocity dispersion
121.109 fs²/mm
Dispersion parameter D
-660.712 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-SSK5 (SCHOTT): N-SSK5
schott_n_ssk5 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "N-SSK5", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_n_ssk5.range_nm)  # (350, 2500) nm
eps = schott_n_ssk5.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=1.59222659λ2λ2−0.00920284626+0.103520774λ2λ2−0.0423530072+1.05174016λ2λ2−106.927374

Valid from 0.35 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.59222659
C30.00920284626
C40.103520774
C50.0423530072
C61.05174016
C7106.927374

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 7.29e-07 1.17e-08 -1.5e-11 6.08e-07 7.66e-10 0.189
nd
1.65844
Vd
50.88
glass code
658509.371
glass status
standard
density
value: 3710
thermal expansion
value: 6.8e-06, temperature range: 243 343; value: 8e-06, temperature range: 293 573
dPgF
-0.0007
resistance
acid: 52.2; stain: 3.0; alkali: 2.2; climatic: 2.0; phosphate: 3.2

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 1.26e-06 K⁻¹ at 633 nm, dn/dT = 5.62e-07 K⁻¹ at 1310 nm, dn/dT = 5.06e-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 419 wavelengths, the same grid as the API and the library
N-SSK5 (SCHOTT), N-SSK5: n and k versus wavelength
λ (µm)nk
0.351.6966373.134400e-06
0.3517291.695992.880057e-06
0.3534661.6953512.624457e-06
0.3552121.6947212.367595e-06
0.3569671.69412.109464e-06
0.358731.6934871.850058e-06
0.3605021.6928831.589370e-06
0.3622831.6922871.327395e-06
0.3640731.69171.064125e-06
0.3651.6913999.277300e-07
0.3658711.691128.778617e-07
0.3676791.6905487.744181e-07
0.3694951.6899846.704635e-07
0.371.6898286.415500e-07
0.371321.6894276.006811e-07
0.3731541.6888775.438933e-07
0.3749981.6883354.868249e-07
0.376851.68784.294747e-07
0.3787121.6872723.718411e-07
0.381.6869123.319500e-07
0.3805821.6867513.235234e-07
0.3824621.6862362.963162e-07
0.3843521.6857292.689747e-07
0.386251.6852272.414980e-07
0.3881581.6847322.138857e-07
0.391.6842631.872300e-07
0.3900761.6842441.868291e-07
0.3920021.6837621.766012e-07
0.3939391.6832851.663228e-07
0.3958851.6828151.559936e-07
0.397841.6823511.456134e-07
0.3998061.6818921.351820e-07
0.41.6818471.341500e-07
0.4017811.6814391.296738e-07
0.4037651.6809921.246842e-07
0.4051.6807171.215800e-07
0.405761.680551.196118e-07
0.4077641.6801131.144194e-07
0.4097781.6796821.092012e-07
0.4118031.6792571.039573e-07
0.4138371.6788369.868749e-08
0.4158811.6784219.339165e-08
0.4179351.678018.806964e-08
0.421.6776048.272134e-08
0.421.6776048.272100e-08
0.4220751.6772048.009252e-08
0.424161.6768087.745089e-08
0.4262551.6764177.479622e-08
0.428361.676037.212843e-08
0.4304761.6756486.944746e-08
0.4326031.675276.675324e-08
0.434741.6748976.404572e-08
0.4361.674686.244900e-08
0.4368871.6745296.190081e-08
0.4390451.6741646.056746e-08
0.4412141.6738045.922751e-08
0.4433941.6734485.788095e-08
0.4455841.6730965.652773e-08
0.4477851.6727485.516783e-08
0.4499971.6724045.380122e-08
0.452221.6720645.242785e-08
0.4544541.6717285.104770e-08
0.4566991.6713964.966073e-08
0.4589551.6710684.826690e-08
0.461.6709174.762100e-08
0.4612221.6707434.704949e-08
0.46351.6704224.598369e-08
0.465791.6701044.491263e-08
0.468091.669794.383627e-08
0.4704031.669484.275460e-08
0.4727261.6691734.166758e-08
0.4750621.668874.057520e-08
0.4774081.6685693.947741e-08
0.4797671.6682723.837421e-08
0.4821361.6679793.726555e-08
0.4845181.6676893.615142e-08
0.4869121.6674013.503179e-08
0.4893171.6671173.390662e-08
0.4917341.6668363.277590e-08
0.4941631.6665583.163959e-08
0.4966041.6662833.049767e-08
0.4990571.6660112.935011e-08
0.51.6659082.890900e-08
0.5015221.6657422.853035e-08
0.5041.6654762.791412e-08
0.5064891.6652132.729485e-08
0.5089911.6649522.667252e-08
0.5115061.6646952.604712e-08
0.5140321.664442.541863e-08
0.5165711.6641872.478703e-08
0.5191231.6639382.415231e-08
0.5216881.6636912.351446e-08
0.5242651.6634462.287345e-08
0.5268541.6632042.222928e-08
0.5294571.6629652.158193e-08
0.5320721.6627282.093138e-08
0.5347011.6624942.027762e-08
0.5373421.6622621.962062e-08
0.5399961.6620321.896039e-08
0.5426641.6618051.829689e-08
0.5453441.661581.763011e-08
0.5461.6615261.746700e-08
0.5480381.6613571.719737e-08
0.5507451.6611371.683922e-08
0.5534661.6609191.647931e-08
0.55621.6607031.611762e-08
0.5589471.6604891.575414e-08
0.5617081.6602781.538887e-08
0.5644831.6600681.502179e-08
0.5672721.6598611.465290e-08
0.5700741.6596551.428219e-08
0.572891.6594521.390965e-08
0.575721.6592511.353526e-08
0.5785641.6590521.315903e-08
0.581.6589521.296900e-08
0.5814221.6588541.307146e-08
0.5842941.6586591.327846e-08
0.587181.6584651.348649e-08
0.590081.6582741.369555e-08
0.5929951.6580841.390564e-08
0.5959251.6578961.411676e-08
0.5988681.657711.432893e-08
0.6018271.6575261.454215e-08
0.6047991.6573431.475642e-08
0.6077871.6571621.497175e-08
0.6107891.6569831.518814e-08
0.6138061.6568061.540560e-08
0.6168391.656631.562414e-08
0.6198861.6564561.584375e-08
0.621.656451.585200e-08
0.6229481.6562841.592731e-08
0.6260251.6561131.600594e-08
0.6291171.6559431.608495e-08
0.6322251.6557761.616435e-08
0.6353481.655611.624414e-08
0.6384861.6554451.632433e-08
0.641641.6552821.640491e-08
0.644811.655121.648590e-08
0.6479951.654961.656728e-08
0.6511961.6548011.664906e-08
0.6544131.6546441.673125e-08
0.6576461.6544881.681384e-08
0.661.6543761.687400e-08
0.6608941.6543331.684668e-08
0.6641591.654181.674695e-08
0.667441.6540291.664672e-08
0.6707371.6538781.654600e-08
0.674051.6537291.644478e-08
0.677381.6535811.634306e-08
0.6807261.6534341.624083e-08
0.6840881.6532891.613810e-08
0.6874671.6531451.603487e-08
0.6908631.6530021.593112e-08
0.6942761.652861.582687e-08
0.6977061.652721.572209e-08
0.71.6526271.565200e-08
0.7011521.6525811.571044e-08
0.7046161.6524431.588610e-08
0.7080961.6523061.606264e-08
0.7115941.652171.624005e-08
0.7151091.6520351.641833e-08
0.7186421.6519011.659750e-08
0.7221921.6517691.677755e-08
0.7257591.6516371.695849e-08
0.7293441.6515071.714032e-08
0.7329471.6513781.732305e-08
0.7365681.6512491.750668e-08
0.7402061.6511221.769123e-08
0.7438621.6509961.787668e-08
0.7475371.650871.806305e-08
0.751231.6507461.825034e-08
0.754941.6506221.843855e-08
0.758671.65051.862770e-08
0.7624171.6503781.881777e-08
0.7661841.6502571.900879e-08
0.7699681.6501381.920075e-08
0.7737721.6500191.939366e-08
0.7775941.6499011.958752e-08
0.7814351.6497831.978234e-08
0.7852951.6496671.997813e-08
0.7891741.6495512.017488e-08
0.7930731.6494372.037260e-08
0.796991.6493232.057130e-08
0.8009271.649212.077098e-08
0.8048841.6490972.097164e-08
0.808861.6489862.117330e-08
0.8128551.6488752.137595e-08
0.816871.6487652.157961e-08
0.8209061.6486552.178427e-08
0.8249611.6485472.198994e-08
0.8290361.6484392.219662e-08
0.8331311.6483322.240433e-08
0.8372471.6482252.261307e-08
0.8413821.6481192.282283e-08
0.8455391.6480142.303363e-08
0.8497151.6479092.324548e-08
0.8539131.6478052.345837e-08
0.8581311.6477022.367231e-08
0.862371.6475992.388731e-08
0.866631.6474972.410337e-08
0.8709111.6473962.432049e-08
0.8752131.6472952.453869e-08
0.8795361.6471942.475797e-08
0.8838811.6470942.497833e-08
0.8882471.6469952.519978e-08
0.8926351.6468962.542232e-08
0.8970441.6467982.564596e-08
0.9014751.64672.587071e-08
0.9059281.6466032.609657e-08
0.9104031.6465062.632354e-08
0.9149011.646412.655164e-08
0.919421.6463142.678086e-08
0.9239621.6462192.701121e-08
0.9285261.6461242.724270e-08
0.9331131.646032.747534e-08
0.9377221.6459362.770912e-08
0.9423541.6458422.794406e-08
0.9470091.6457492.818016e-08
0.9516871.6456572.841742e-08
0.9563881.6455642.865586e-08
0.9611121.6454722.889548e-08
0.965861.6453812.913628e-08
0.9706311.645292.937826e-08
0.9754261.6451992.962145e-08
0.9802441.6451082.986583e-08
0.9850861.6450183.011143e-08
0.9899531.6449283.035823e-08
0.9948431.6448393.060626e-08
0.9997571.6447493.085551e-08
1.00471.644663.110599e-08
1.009661.6445723.135771e-08
1.014651.6444833.161067e-08
1.019661.6443953.186488e-08
1.024691.6443073.212035e-08
1.029761.644223.237707e-08
1.034841.6441323.263507e-08
1.039961.6440453.289434e-08
1.045091.6439583.315490e-08
1.050251.6438723.341674e-08
1.055441.6437853.367987e-08
1.061.643713.391100e-08
1.060661.6436993.400108e-08
1.06591.6436133.471986e-08
1.071161.6435273.544220e-08
1.076451.6434413.616811e-08
1.081771.6433563.689760e-08
1.087111.643273.763070e-08
1.092481.6431853.836742e-08
1.097881.64313.910778e-08
1.10331.6430153.985179e-08
1.108751.642934.059948e-08
1.114231.6428454.135086e-08
1.119731.642764.210596e-08
1.125271.6426764.286478e-08
1.130821.6425914.362736e-08
1.136411.6425064.439370e-08
1.142021.6424224.516382e-08
1.147671.6423384.593775e-08
1.153331.6422534.671551e-08
1.159031.6421694.749710e-08
1.164761.6420854.828256e-08
1.170511.6424.907189e-08
1.176291.6419164.986513e-08
1.18211.6418325.066228e-08
1.187941.6417485.146337e-08
1.193811.6416635.226842e-08
1.199711.6415795.307745e-08
1.205631.6414955.389047e-08
1.211591.641415.470750e-08
1.217571.6413265.552858e-08
1.223591.6412415.635371e-08
1.229631.6411575.718291e-08
1.235711.6410725.801621e-08
1.241811.6409875.885363e-08
1.247951.6409035.969519e-08
1.254111.6408186.054090e-08
1.260311.6407336.139079e-08
1.266531.6406476.224487e-08
1.272791.6405626.310318e-08
1.279071.6404776.396573e-08
1.285391.6403916.483253e-08
1.291741.6403056.570362e-08
1.298121.6402196.657901e-08
1.304541.6401336.745873e-08
1.310981.6400476.834279e-08
1.317461.639966.923122e-08
1.323961.6398747.012404e-08
1.33051.6397877.102127e-08
1.337081.6396997.192292e-08
1.343681.6396127.282904e-08
1.350321.6395247.373963e-08
1.356991.6394377.465472e-08
1.363691.6393487.557432e-08
1.370431.639267.649847e-08
1.37721.6391717.742719e-08
1.3841.6390827.836049e-08
1.390841.6389937.929841e-08
1.397711.6389038.024095e-08
1.404611.6388138.118816e-08
1.411551.6387238.214004e-08
1.418521.6386338.309662e-08
1.425531.6385428.405793e-08
1.432571.638458.502399e-08
1.439651.6383598.599482e-08
1.446761.6382678.697044e-08
1.453911.6381748.795089e-08
1.461091.6380818.893618e-08
1.468311.6379888.992633e-08
1.475561.6378959.092138e-08
1.482851.6378019.192134e-08
1.490171.6377069.292624e-08
1.497531.6376119.393610e-08
1.504931.6375169.495096e-08
1.512371.637429.597082e-08
1.519841.6373239.699573e-08
1.527341.6372279.802570e-08
1.531.6371929.839000e-08
1.534891.6371291.038682e-07
1.542471.6370311.123634e-07
1.550091.6369331.209007e-07
1.557751.6368341.294801e-07
1.565441.6367351.381019e-07
1.573181.6366351.467662e-07
1.580951.6365341.554734e-07
1.588761.6364331.642236e-07
1.59661.6363311.730170e-07
1.604491.6362291.818539e-07
1.612421.6361261.907344e-07
1.620381.6360221.996588e-07
1.628391.6359182.086272e-07
1.636431.6358132.176400e-07
1.644511.6357082.266972e-07
1.652641.6356022.357993e-07
1.66081.6354952.449462e-07
1.6691.6353872.541384e-07
1.677251.6352792.633760e-07
1.685531.635172.726592e-07
1.693861.635062.819882e-07
1.702231.634952.913634e-07
1.710641.6348393.007848e-07
1.719091.6347273.102528e-07
1.727581.6346143.197676e-07
1.736111.6345013.293294e-07
1.744691.6343863.389384e-07
1.753311.6342713.485948e-07
1.761971.6341553.582990e-07
1.770671.6340393.680511e-07
1.779421.6339213.778513e-07
1.788211.6338023.877000e-07
1.797041.6336833.975974e-07
1.805921.6335634.075436e-07
1.814841.6334424.175389e-07
1.82381.6333194.275837e-07
1.832811.6331964.376780e-07
1.841871.6330724.478222e-07
1.850961.6329474.580166e-07
1.860111.6328214.682612e-07
1.86931.6326944.785565e-07
1.878531.6325664.889027e-07
1.887811.6324374.992999e-07
1.897141.6323075.097485e-07
1.906511.6321765.202488e-07
1.915921.6320445.308009e-07
1.925391.6319115.414051e-07
1.93491.6317775.520617e-07
1.944461.6316415.627709e-07
1.954061.6315055.735331e-07
1.963721.6313675.843484e-07
1.971.6312775.913900e-07
1.973421.6312286.152872e-07
1.983161.6310886.834892e-07
1.992961.6309467.520281e-07
2.00281.6308048.209055e-07
2.01271.630668.901233e-07
2.022641.6305159.596829e-07
2.032631.6303691.029586e-06
2.042671.6302211.099835e-06
2.052761.6300721.170430e-06
2.06291.6299221.241374e-06
2.073091.629771.312669e-06
2.083331.6296181.384316e-06
2.093631.6294631.456317e-06
2.103971.6293081.528673e-06
2.114361.629151.601387e-06
2.12481.6289921.674460e-06
2.13531.6288321.747894e-06
2.145851.628671.821691e-06
2.156451.6285071.895853e-06
2.16711.6283431.970380e-06
2.177811.6281772.045276e-06
2.188561.6280092.120542e-06
2.199371.627842.196180e-06
2.210241.6276692.272191e-06
2.221161.6274972.348577e-06
2.232131.6273232.425342e-06
2.243161.6271472.502485e-06
2.254241.626972.580009e-06
2.265371.626792.657916e-06
2.276561.6266092.736208e-06
2.287811.6264272.814887e-06
2.299111.6262422.893955e-06
2.310471.6260562.973413e-06
2.321881.6258683.053263e-06
2.3251.6258163.075100e-06
2.333351.6256783.231535e-06
2.344871.6254863.447516e-06
2.356461.6252933.664563e-06
2.36811.6250973.882683e-06
2.37981.6248994.101881e-06
2.391551.62474.322161e-06
2.403371.6244984.543530e-06
2.415241.6242944.765991e-06
2.427171.6240894.989552e-06
2.439161.6238815.214217e-06
2.451211.6236715.439992e-06
2.463311.6234595.666883e-06
2.475481.6232455.894893e-06
2.487711.6230286.124031e-06
2.51.6228096.354300e-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
—