Optical constants

Refractive index of S-BSM16 (OHARA)

S-BSM16: n,k 0.31–2.4 µm

Data
formula 2 + tabulated k
Range
0.31–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.31–2.4 µm
Refractive index n
1.62041
Extinction coefficient k
8.27428e-09
Permittivity ε1
2.62572
Permittivity ε2
2.68154e-08
Absorption coefficient α
0.00176953 cm⁻¹
Penetration depth δ = λ/(2πk)
1.13024e+10 nm
Abbe number Vd
60.29
Chromatic dispersion dn/dλ
-0.0531785 µm⁻¹
Group index ng
1.65166
Group velocity dispersion
92.6238 fs²/mm
Dispersion parameter D
-505.312 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

# S-BSM16 (OHARA): S-BSM16
ohara_s_bsm16 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-BSM16", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_bsm16.range_nm)  # (310, 2400) nm
eps = ohara_s_bsm16.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=1.14490383λ2λ2−0.0137034916+0.439563911λ2λ2+0.00186514205+1.27688079λ2λ2−119.535585

Valid from 0.31 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.14490383
C30.0137034916
C40.439563911
C5-0.00186514205
C61.27688079
C7119.535585

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -5.59e-07 1.35e-08 -3.47e-11 4e-07 5.04e-10 0.201
nd
1.620411
Vd
60.289582
glass code
620603
density
value: 3590
thermal expansion
value: 6.7e-06, temperature range: 243 343; value: 7.6e-06, temperature range: 293 573
dPgF
-0.0012
resistance
acid: 53.2; climatic: 2.0; phosphate: 4.2

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 2.76e-07 K⁻¹ at 633 nm, dn/dT = -1.57e-07 K⁻¹ at 1310 nm, dn/dT = -1.90e-07 K⁻¹ at 1550 nm

References

Cite

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp); See also OHARA 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 427 wavelengths, the same grid as the API and the library
S-BSM16 (OHARA), S-BSM16: n and k versus wavelength
λ (µm)nk
0.311.6629741.136100e-05
0.3115941.6623151.024596e-05
0.3131971.6616669.125181e-06
0.3148071.6610247.998641e-06
0.3164261.6603926.866307e-06
0.3180531.6597675.728151e-06
0.3196891.6591514.584141e-06
0.321.6590354.366700e-06
0.3213331.6585424.034290e-06
0.3229861.6579423.622256e-06
0.3246471.6573493.208103e-06
0.3263161.6567642.791821e-06
0.3279941.6561862.373397e-06
0.3296811.6556161.952822e-06
0.331.6555091.873300e-06
0.3313761.6550531.737785e-06
0.3330811.6544971.570014e-06
0.3347941.6539481.401379e-06
0.3365151.6534061.231878e-06
0.3382461.6528721.061504e-06
0.3399851.6523438.902549e-07
0.341.6523398.888100e-07
0.3417341.6518228.131911e-07
0.3434911.6513077.365399e-07
0.3452581.6507986.594945e-07
0.3470331.6502965.820528e-07
0.3488181.64985.042130e-07
0.351.6494764.526500e-07
0.3506121.649314.388141e-07
0.3524151.6488273.980270e-07
0.3542271.6483493.570300e-07
0.3560491.6478773.158223e-07
0.357881.6474112.744026e-07
0.359721.6469512.327700e-07
0.361.6468812.264400e-07
0.361571.6464962.102399e-07
0.363431.6460471.910544e-07
0.3652981.6456031.717702e-07
0.3671771.6451651.523869e-07
0.3690651.6447321.329038e-07
0.371.644521.232600e-07
0.3709631.6443041.184627e-07
0.3728711.6438811.089623e-07
0.3747891.6434649.941292e-08
0.3767161.6430518.981447e-08
0.3786531.6426448.016666e-08
0.381.6423647.346000e-08
0.3806011.6422417.205458e-08
0.3825581.6418436.747413e-08
0.3845251.641456.287013e-08
0.3865031.6410615.824245e-08
0.388491.6406775.359098e-08
0.391.640395.005800e-08
0.3904881.6402984.933306e-08
0.3924961.6399234.635098e-08
0.3945151.6395534.335356e-08
0.3965441.6391874.034073e-08
0.3985831.6388253.731240e-08
0.41.6385773.520800e-08
0.4006331.6384673.494349e-08
0.4026931.6381133.408207e-08
0.4047641.6377643.321623e-08
0.4068451.6374193.234593e-08
0.4089381.6370773.147116e-08
0.4110411.636743.059189e-08
0.4131551.6364062.970810e-08
0.4152791.6360772.881976e-08
0.4174151.6357512.792685e-08
0.4195611.6354292.702935e-08
0.421.6353642.684600e-08
0.4217191.635112.665260e-08
0.4238881.6347952.640862e-08
0.4260681.6344842.616338e-08
0.4282591.6341762.591688e-08
0.4304611.6338722.566911e-08
0.4326751.6335712.542007e-08
0.43491.6332732.516975e-08
0.4371371.6329792.491814e-08
0.4393851.6326882.466523e-08
0.441.632612.459600e-08
0.4416441.6324012.438505e-08
0.4439151.6321162.409365e-08
0.4461981.6318352.380076e-08
0.4484931.6315572.350636e-08
0.4507991.6312822.321044e-08
0.4531181.631012.291300e-08
0.4554481.6307412.261404e-08
0.457791.6304752.231353e-08
0.461.6302282.203000e-08
0.4601441.6302122.198151e-08
0.4625111.6299512.118642e-08
0.4648891.6296942.038723e-08
0.467281.6294391.958394e-08
0.4696831.6291881.877651e-08
0.4720981.6289381.796494e-08
0.4745261.6286921.714919e-08
0.4769671.6284481.632924e-08
0.4794191.6282071.550508e-08
0.481.628151.531000e-08
0.4818851.6279681.499381e-08
0.4843631.6277321.457810e-08
0.4868541.6274991.416025e-08
0.4893581.6272681.374025e-08
0.4918741.6270391.331810e-08
0.4944041.6268131.289377e-08
0.4969461.6265891.246726e-08
0.4995021.6263681.203855e-08
0.51.6263251.195500e-08
0.5020711.6261491.164125e-08
0.5046531.6259321.125003e-08
0.5072481.6257171.085680e-08
0.5098561.6255051.046155e-08
0.5124781.6252951.006426e-08
0.5151141.6250879.664934e-09
0.5177631.6248819.263552e-09
0.5204261.6246778.860105e-09
0.5231021.6244768.454583e-09
0.5257921.6242768.046976e-09
0.5284961.6240797.637273e-09
0.5312141.6238837.225463e-09
0.5339461.6236896.811535e-09
0.5366921.6234986.395478e-09
0.5394521.6233085.977282e-09
0.5422261.6231215.556935e-09
0.5450141.6229355.134426e-09
0.5478171.6227514.709745e-09
0.551.6226094.379000e-09
0.5506341.6225684.444720e-09
0.5534661.6223884.738080e-09
0.5563121.6222095.032948e-09
0.5591731.6220335.329332e-09
0.5620491.6218575.627241e-09
0.5649391.6216845.926682e-09
0.5678451.6215126.227662e-09
0.5707651.6213426.530191e-09
0.57371.6211746.834275e-09
0.576651.6210077.139923e-09
0.5796161.6208427.447143e-09
0.5825971.6206787.755943e-09
0.5855931.6205168.066330e-09
0.5886041.6203568.378314e-09
0.5916311.6201978.691903e-09
0.5946741.6200399.007104e-09
0.5977321.6198839.323926e-09
0.61.6197699.558900e-09
0.6008061.6197289.655305e-09
0.6038961.6195751.002497e-08
0.6070011.6194231.039653e-08
0.6101231.6192731.077000e-08
0.613261.6191241.114539e-08
0.6164141.6189761.152272e-08
0.6195841.618831.190198e-08
0.622771.6186851.228320e-08
0.6259731.6185411.266637e-08
0.6291921.6183991.305152e-08
0.6324281.6182581.343864e-08
0.635681.6181181.382776e-08
0.6389491.6179791.421888e-08
0.6422351.6178421.461201e-08
0.6455381.6177061.500716e-08
0.6488581.6175711.540434e-08
0.651.6175251.554100e-08
0.6521951.6174371.534836e-08
0.6555491.6173041.505394e-08
0.658921.6171721.475802e-08
0.6623081.6170421.446057e-08
0.6657141.6169121.416159e-08
0.6691381.6167841.386107e-08
0.6725791.6166571.355901e-08
0.6760381.616531.325539e-08
0.6795151.6164051.295022e-08
0.6830091.6162811.264347e-08
0.6865211.6161581.233515e-08
0.6900521.6160361.202524e-08
0.6936011.6159141.171373e-08
0.6971681.6157941.140063e-08
0.71.61571.115200e-08
0.7007531.6156751.111599e-08
0.7043571.6155561.094364e-08
0.7079791.6154391.077040e-08
0.711621.6153221.059628e-08
0.7152791.6152061.042125e-08
0.7189581.6150921.024533e-08
0.7226551.6149781.006850e-08
0.7263711.6148649.890760e-09
0.7301071.6147529.712108e-09
0.7338621.6146419.532537e-09
0.7376361.614539.352043e-09
0.7414291.614429.170621e-09
0.7452421.6143118.988265e-09
0.7490741.6142038.804972e-09
0.7529271.6140958.620736e-09
0.7567991.6139888.435552e-09
0.760691.6138828.249417e-09
0.7646021.6137778.062324e-09
0.7685351.6136727.874269e-09
0.7724871.6135687.685246e-09
0.7764591.6134657.495252e-09
0.7804521.6133627.304281e-09
0.7844661.613267.112327e-09
0.78851.6131586.919387e-09
0.7925551.6130586.725454e-09
0.7966311.6129586.530524e-09
0.81.6128766.369400e-09
0.8007281.6128586.375195e-09
0.8048461.6127596.407981e-09
0.8089851.6126616.440936e-09
0.8131451.6125636.474061e-09
0.8173271.6124666.507355e-09
0.821531.6123696.540821e-09
0.8257551.6122736.574459e-09
0.8300011.6121776.608270e-09
0.834271.6120826.642255e-09
0.838561.6119886.676415e-09
0.8428721.6118946.710750e-09
0.8472071.61186.745262e-09
0.8515641.6117076.779952e-09
0.8559431.6116146.814819e-09
0.8603451.6115226.849867e-09
0.8647691.611436.885094e-09
0.8692171.6113396.920503e-09
0.8736871.6112486.956093e-09
0.878181.6111576.991867e-09
0.8826961.6110677.027824e-09
0.8872351.6109777.063967e-09
0.8917981.6108887.100295e-09
0.8963841.6107997.136811e-09
0.91.6107297.165600e-09
0.9009941.610717.173513e-09
0.9056271.6106227.210400e-09
0.9102851.6105347.247477e-09
0.9149661.6104467.284744e-09
0.9196711.6103597.322203e-09
0.9244011.6102727.359855e-09
0.9291551.6101857.397700e-09
0.9339331.6100997.435740e-09
0.9387361.6100137.473976e-09
0.9435631.6099277.512408e-09
0.9484161.6098417.551038e-09
0.9532931.6097567.589867e-09
0.9581961.6096717.628895e-09
0.9631231.6095867.668124e-09
0.9680761.6095017.707555e-09
0.9730551.6094177.747188e-09
0.9780591.6093327.787026e-09
0.9830891.6092487.827068e-09
0.9881441.6091647.867316e-09
0.9932261.6090817.907771e-09
0.9983341.6089977.948434e-09
11.608977.961700e-09
1.003471.6089147.989310e-09
1.008631.608838.030398e-09
1.013821.6087478.071697e-09
1.019031.6086648.113208e-09
1.024271.6085818.154933e-09
1.029541.6084998.196872e-09
1.034831.6084168.239027e-09
1.040151.6083338.281399e-09
1.04551.6082518.323989e-09
1.050881.6081688.366797e-09
1.056281.6080868.409826e-09
1.061721.6080048.453076e-09
1.067181.6079218.496549e-09
1.072661.6078398.540245e-09
1.078181.6077578.584166e-09
1.083721.6076748.628313e-09
1.08931.6075928.672687e-09
1.09491.607518.717289e-09
1.100531.6074288.762120e-09
1.106191.6073458.807182e-09
1.111881.6072638.852475e-09
1.11761.6071818.898002e-09
1.123341.6070988.943763e-09
1.129121.6070168.989759e-09
1.134931.6069339.035991e-09
1.140761.6068519.082462e-09
1.146631.6067689.129171e-09
1.152531.6066859.176120e-09
1.158451.6066029.223311e-09
1.164411.6065199.270745e-09
1.17041.6064369.318423e-09
1.176421.6063539.366345e-09
1.182471.6062699.414514e-09
1.188551.6061869.462931e-09
1.194661.6061029.511597e-09
1.21.6060299.554100e-09
1.200811.6060189.876027e-09
1.206981.6059341.234401e-08
1.213191.605851.482469e-08
1.219431.6057651.731813e-08
1.22571.605681.982439e-08
1.2321.6055962.234353e-08
1.238341.605512.487563e-08
1.244711.6054252.742076e-08
1.251111.6053392.997897e-08
1.257541.6052533.255034e-08
1.264011.6051673.513493e-08
1.270511.6050813.773281e-08
1.277041.6049944.034406e-08
1.283611.6049074.296873e-08
1.290211.604824.560690e-08
1.296841.6047324.825864e-08
1.303511.6046445.092401e-08
1.310221.6045565.360309e-08
1.316961.6044675.629595e-08
1.323731.6043785.900266e-08
1.330541.6042896.172328e-08
1.337381.6041996.445790e-08
1.344261.6041096.720658e-08
1.351171.6040186.996940e-08
1.358121.6039277.274642e-08
1.36511.6038367.553773e-08
1.372121.6037447.834339e-08
1.379181.6036518.116348e-08
1.386271.6035598.399807e-08
1.39341.6034668.684724e-08
1.41.6033798.948500e-08
1.400571.6033728.941242e-08
1.407771.6032788.848822e-08
1.415011.6031838.755927e-08
1.422281.6030888.662554e-08
1.42961.6029928.568700e-08
1.436951.6028968.474364e-08
1.444341.6027998.379543e-08
1.451771.6027028.284235e-08
1.459231.6026048.188436e-08
1.466741.6025068.092144e-08
1.474281.6024077.995358e-08
1.481861.6023077.898073e-08
1.489481.6022077.800289e-08
1.497141.6021067.702001e-08
1.504841.6020057.603208e-08
1.512581.6019037.503907e-08
1.520361.60187.404095e-08
1.528181.6016967.303770e-08
1.536041.6015927.202929e-08
1.543941.6014887.101570e-08
1.551881.6013826.999689e-08
1.559861.6012766.897284e-08
1.567881.6011696.794353e-08
1.575941.6010616.690892e-08
1.584051.6009536.586899e-08
1.592191.6008446.482372e-08
1.61.6007396.382200e-08
1.600381.6007346.405770e-08
1.608611.6006236.914428e-08
1.616881.6005117.425701e-08
1.62521.6003997.939604e-08
1.633561.6002868.456149e-08
1.641961.6001728.975351e-08
1.65041.6000579.497223e-08
1.658891.5999411.002178e-07
1.667421.5998241.054903e-07
1.6761.5997071.107900e-07
1.684611.5995881.161169e-07
1.693281.5994691.214712e-07
1.701991.5993481.268530e-07
1.710741.5992271.322625e-07
1.719541.5991051.376998e-07
1.728381.5989811.431651e-07
1.737271.5988571.486585e-07
1.74621.5987321.541802e-07
1.755181.5986051.597302e-07
1.764211.5984781.653088e-07
1.773281.5983491.709161e-07
1.78241.598221.765522e-07
1.791571.5980891.822173e-07
1.81.5979691.874300e-07
1.800781.5979571.884605e-07
1.810041.5978252.007106e-07
1.819351.5976912.130237e-07
1.82871.5975552.254002e-07
1.838111.5974192.378402e-07
1.847561.5972812.503443e-07
1.857061.5971432.629126e-07
1.866611.5970032.755456e-07
1.876211.5968612.882436e-07
1.885861.5967193.010069e-07
1.895561.5965753.138357e-07
1.905311.596433.267306e-07
1.915111.5962833.396918e-07
1.924951.5961353.527196e-07
1.934851.5959863.658145e-07
1.94481.5958363.789766e-07
1.954811.5956843.922065e-07
1.964861.5955314.055044e-07
1.974961.5953764.188707e-07
1.985121.595224.323057e-07
1.995331.5950624.458098e-07
21.5949894.519900e-07
2.005591.5949034.849638e-07
2.01591.5947425.458118e-07
2.026271.594586.069727e-07
2.036691.5944166.684481e-07
2.047161.594257.302397e-07
2.057691.5940837.923491e-07
2.068271.5939158.547778e-07
2.078911.5937459.175276e-07
2.08961.5935739.806001e-07
2.100351.5933991.043997e-06
2.111151.5932241.107720e-06
2.122011.5930471.171770e-06
2.132921.5928681.236150e-06
2.143891.5926871.300862e-06
2.154911.5925051.365905e-06
2.165991.5923211.431284e-06
2.177131.5921341.496998e-06
2.188331.5919461.563051e-06
2.199581.5917571.629443e-06
2.21.591751.631900e-06
2.21091.5915651.788251e-06
2.222261.5913711.951414e-06
2.233691.5911752.115415e-06
2.245181.5909772.280261e-06
2.256731.5907782.445953e-06
2.268331.5905762.612498e-06
2.281.5903722.779900e-06
2.291721.5901662.948162e-06
2.303511.5899573.117289e-06
2.315351.5897473.287287e-06
2.327261.5895343.458158e-06
2.339231.5893193.629909e-06
2.351261.5891023.802542e-06
2.363351.5888833.976063e-06
2.37551.5886614.150477e-06
2.387721.5884374.325788e-06
2.41.588214.502000e-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
—