Optical constants

Refractive index of S-BSM22 (OHARA)

S-BSM22: n,k 0.34–2.4 µm

Data
formula 2 + tabulated k
Range
0.34–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.34–2.4 µm
Refractive index n
1.62229
Extinction coefficient k
2.12588e-08
Permittivity ε1
2.63184
Permittivity ε2
6.89761e-08
Absorption coefficient α
0.00454639 cm⁻¹
Penetration depth δ = λ/(2πk)
4.39909e+09 nm
Abbe number Vd
53.169
Chromatic dispersion dn/dλ
-0.0601533 µm⁻¹
Group index ng
1.65764
Group velocity dispersion
108.599 fs²/mm
Dispersion parameter D
-592.465 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-BSM22 (OHARA): S-BSM22
ohara_s_bsm22 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-BSM22", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_bsm22.range_nm)  # (340, 2400) nm
eps = ohara_s_bsm22.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=1.44305741λ2λ2−0.0081920891+0.140786358λ2λ2−0.0356911455+1.26093951λ2λ2−131.959337

Valid from 0.34 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.44305741
C30.0081920891
C40.140786358
C50.0356911455
C61.26093951
C7131.959337

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 2.82e-06 1.07e-08 -3.24e-11 4.7e-07 7.23e-10 0.235
nd
1.622296
Vd
53.169067
glass code
622532
density
value: 3240
thermal expansion
value: 6.6e-06, temperature range: 243 343; value: 7.6e-06, temperature range: 293 573
dPgF
-0.0012
resistance
acid: 3.2; climatic: 2.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 2.10e-06 K⁻¹ at 633 nm, dn/dT = 1.52e-06 K⁻¹ at 1310 nm, dn/dT = 1.48e-06 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 424 wavelengths, the same grid as the API and the library
S-BSM22 (OHARA), S-BSM22: n and k versus wavelength
λ (µm)nk
0.341.6600256.833700e-06
0.3416691.6594086.155179e-06
0.3433471.65885.473326e-06
0.3450331.65824.788125e-06
0.3467271.6576084.099560e-06
0.3484291.6570243.407614e-06
0.351.6564952.769200e-06
0.350141.6564482.747698e-06
0.3518591.655882.483788e-06
0.3535871.6553192.218582e-06
0.3553231.6547661.952074e-06
0.3570681.654221.684258e-06
0.3588211.6536821.415126e-06
0.361.6533251.234100e-06
0.3605831.653151.198351e-06
0.3623531.6526261.089706e-06
0.3641321.6521089.805279e-07
0.365921.6515978.708133e-07
0.3677171.6510927.605600e-07
0.3695221.6505946.497654e-07
0.371.6504646.204400e-07
0.3713361.6501035.796526e-07
0.373161.6496175.240089e-07
0.3749921.6491384.680921e-07
0.3768331.6486654.119007e-07
0.3786831.6481983.554334e-07
0.381.647873.152500e-07
0.3805431.6477363.082059e-07
0.3824111.6472812.839516e-07
0.3842891.6468312.595782e-07
0.3861761.6463872.350851e-07
0.3880721.6459482.104717e-07
0.3899771.6455151.857376e-07
0.391.6455091.854400e-07
0.3918921.6450871.724373e-07
0.3938161.6446641.592125e-07
0.395751.6442461.459227e-07
0.3976931.6438331.325677e-07
0.3996451.6434261.191471e-07
0.41.6433531.167100e-07
0.4016081.6430231.124822e-07
0.403581.6426251.072966e-07
0.4055611.6422321.020855e-07
0.4075521.6418449.684879e-08
0.4095531.641469.158639e-08
0.4115641.6410818.629815e-08
0.4135851.6407068.098395e-08
0.4156161.6403367.564366e-08
0.4176561.639977.027715e-08
0.4197071.6396086.488428e-08
0.421.6395576.411400e-08
0.4217681.6392516.312445e-08
0.4238391.6388976.196529e-08
0.425921.6385486.080043e-08
0.4280111.6382035.962986e-08
0.4301121.6378625.845353e-08
0.4322241.6375245.727144e-08
0.4343471.6371915.608353e-08
0.4364791.6368615.488980e-08
0.4386221.6365365.369020e-08
0.441.6363295.291900e-08
0.4407761.6362135.258046e-08
0.442941.6358955.163611e-08
0.4451151.635585.068713e-08
0.44731.6352694.973349e-08
0.4494971.6349614.877517e-08
0.4517041.6346574.781214e-08
0.4539211.6343564.684438e-08
0.456151.6340584.587187e-08
0.458391.6337644.489459e-08
0.461.6335554.419200e-08
0.4606411.6334724.388266e-08
0.4629021.6331854.279036e-08
0.4651751.63294.169270e-08
0.4674591.6326184.058965e-08
0.4697541.632343.948118e-08
0.4720611.6320643.836727e-08
0.4743791.6317923.724789e-08
0.4767081.6315223.612301e-08
0.4790481.6312563.499261e-08
0.481.6311493.453300e-08
0.48141.6309923.379161e-08
0.4837641.6307313.254029e-08
0.4861391.6304733.128283e-08
0.4885261.6302183.001919e-08
0.4909251.6299652.874935e-08
0.4933351.6297162.747328e-08
0.4957581.6294682.619094e-08
0.4981921.6292242.490230e-08
0.51.6290442.394500e-08
0.5006381.6289822.380729e-08
0.5030961.6287422.327659e-08
0.5055661.6285052.274328e-08
0.5080481.6282712.220735e-08
0.5105431.6280392.166878e-08
0.513051.6278092.112758e-08
0.5155691.6275822.058371e-08
0.51811.6273572.003718e-08
0.5206441.6271341.948796e-08
0.52321.6269141.893605e-08
0.5257691.6266961.838143e-08
0.5283511.626481.782408e-08
0.5309451.6262671.726400e-08
0.5335521.6260551.670116e-08
0.5361721.6258461.613557e-08
0.5388041.6256391.556719e-08
0.541451.6254341.499603e-08
0.5441081.6252311.442206e-08
0.546781.625031.384527e-08
0.5494641.6248311.326566e-08
0.551.6247911.315000e-08
0.5521621.6246341.361629e-08
0.5548731.6244391.420096e-08
0.5575981.6242461.478851e-08
0.5603351.6240551.537894e-08
0.5630871.6238651.597227e-08
0.5658511.6236781.656851e-08
0.568631.6234921.716768e-08
0.5714221.6233081.776979e-08
0.5742271.6231261.837486e-08
0.5770471.6229461.898290e-08
0.579881.6227671.959392e-08
0.5827271.6225912.020794e-08
0.5855881.6224152.082498e-08
0.5884641.6222422.144505e-08
0.5913531.622072.206816e-08
0.5942561.62192.269434e-08
0.5971741.6217312.332358e-08
0.61.6215712.393300e-08
0.6001061.6215642.394829e-08
0.6030531.6213992.437235e-08
0.6060141.6212352.479850e-08
0.6089891.6210732.522673e-08
0.6119791.6209122.565707e-08
0.6149841.6207532.608952e-08
0.6180041.6205952.652409e-08
0.6210381.6204382.696080e-08
0.6240871.6202832.739965e-08
0.6271521.620132.784065e-08
0.6302311.6199772.828382e-08
0.6333251.6198272.872917e-08
0.6364351.6196772.917670e-08
0.639561.6195292.962643e-08
0.64271.6193823.007837e-08
0.6458561.6192373.053253e-08
0.6490271.6190923.098892e-08
0.651.6190483.112900e-08
0.6522131.6189493.073932e-08
0.6554161.6188073.017551e-08
0.6586341.6186672.960894e-08
0.6618681.6185282.903959e-08
0.6651171.618392.846744e-08
0.6683831.6182532.789248e-08
0.6716651.6181172.731470e-08
0.6749631.6179822.673408e-08
0.6782771.6178492.615061e-08
0.6816071.6177162.556427e-08
0.6849541.6175852.497506e-08
0.6883171.6174552.438296e-08
0.6916961.6173262.378794e-08
0.6950931.6171982.319001e-08
0.6985051.6170712.258914e-08
0.71.6170162.232600e-08
0.7019351.6169452.214060e-08
0.7053821.616822.181040e-08
0.7088451.6166962.147857e-08
0.7123251.6165732.114511e-08
0.7158231.6164512.081002e-08
0.7193371.616332.047328e-08
0.7228691.616212.013489e-08
0.7264191.6160911.979483e-08
0.7299851.6159731.945311e-08
0.7335691.6158561.910971e-08
0.7371711.6157391.876462e-08
0.7407911.6156241.841784e-08
0.7444281.6155091.806935e-08
0.7480831.6153951.771916e-08
0.7517561.6152821.736724e-08
0.7554471.615171.701360e-08
0.7591561.6150591.665822e-08
0.7628841.6149481.630109e-08
0.766631.6148391.594222e-08
0.7703941.614731.558158e-08
0.7741761.6146221.521916e-08
0.7779781.6145141.485497e-08
0.7817971.6144071.448900e-08
0.7856361.6143021.412122e-08
0.7894931.6141961.375164e-08
0.793371.6140921.338024e-08
0.7972651.6139881.300702e-08
0.81.6139161.274500e-08
0.801181.6138851.276379e-08
0.8051131.6137821.282646e-08
0.8090671.6136811.288943e-08
0.8130391.613581.295271e-08
0.8170311.6134791.301630e-08
0.8210431.6133791.308021e-08
0.8250741.613281.314443e-08
0.8291251.6131811.320896e-08
0.8331961.6130831.327381e-08
0.8372871.6129861.333898e-08
0.8413981.6128891.340447e-08
0.8455291.6127931.347028e-08
0.8496811.6126971.353641e-08
0.8538531.6126021.360287e-08
0.8580451.6125071.366966e-08
0.8622581.6124131.373677e-08
0.8664921.6123191.380421e-08
0.8707461.6122261.387198e-08
0.8750211.6121341.394009e-08
0.8793181.6120421.400853e-08
0.8836351.611951.407731e-08
0.8879741.6118591.414642e-08
0.8923341.6117681.421587e-08
0.8967151.6116781.428567e-08
0.91.6116111.433800e-08
0.9011181.6115881.444497e-08
0.9055421.6114991.486844e-08
0.9099881.611411.529398e-08
0.9144561.6113211.572161e-08
0.9189461.6112331.615134e-08
0.9234581.6111451.658319e-08
0.9279921.6110581.701715e-08
0.9325491.6109711.745324e-08
0.9371281.6108841.789148e-08
0.9417291.6107981.833186e-08
0.9463531.6107121.877441e-08
0.9509991.6106261.921913e-08
0.9556691.6105411.966604e-08
0.9603611.6104562.011513e-08
0.9650761.6103712.056644e-08
0.9698151.6102872.101996e-08
0.9745761.6102032.147571e-08
0.9793621.6101192.193369e-08
0.984171.6100362.239392e-08
0.9890021.6099532.285642e-08
0.9938581.609872.332118e-08
0.9987381.6097872.378823e-08
11.6097662.390900e-08
1.003641.6097042.382176e-08
1.008571.6096222.370371e-08
1.013521.609542.358509e-08
1.01851.6094582.346588e-08
1.02351.6093772.334608e-08
1.028521.6092952.322570e-08
1.033571.6092142.310473e-08
1.038651.6091332.298316e-08
1.043751.6090522.286100e-08
1.048871.6089722.273824e-08
1.054021.6088912.261487e-08
1.05921.6088112.249090e-08
1.06441.6087312.236632e-08
1.069631.608652.224112e-08
1.074881.608572.211532e-08
1.080151.6084912.198889e-08
1.085461.6084112.186185e-08
1.090791.6083312.173418e-08
1.096141.6082522.160588e-08
1.101531.6081722.147695e-08
1.106931.6080932.134739e-08
1.112371.6080132.121720e-08
1.117831.6079342.108636e-08
1.123321.6078552.095489e-08
1.128831.6077762.082277e-08
1.134381.6076972.068999e-08
1.139951.6076172.055657e-08
1.145541.6075382.042249e-08
1.151171.6074592.028776e-08
1.156821.607382.015236e-08
1.16251.6073012.001629e-08
1.168211.6072221.987956e-08
1.173941.6071431.974216e-08
1.179711.6070641.960408e-08
1.18551.6069841.946533e-08
1.191321.6069051.932589e-08
1.197171.6068261.918577e-08
1.21.6067881.911800e-08
1.203051.6067472.001959e-08
1.208961.6066672.176632e-08
1.214891.6065882.352163e-08
1.220861.6065082.528556e-08
1.226851.6064282.705815e-08
1.232871.6063482.883944e-08
1.238931.6062693.062948e-08
1.245011.6061883.242831e-08
1.251121.6061083.423597e-08
1.257271.6060283.605251e-08
1.263441.6059483.787796e-08
1.269641.6058673.971238e-08
1.275881.6057864.155581e-08
1.282141.6057054.340828e-08
1.288441.6056244.526986e-08
1.294761.6055434.714057e-08
1.301121.6054614.902046e-08
1.307511.605385.090959e-08
1.313931.6052985.280799e-08
1.320381.6052165.471572e-08
1.326861.6051335.663281e-08
1.333381.6050515.855931e-08
1.339931.6049686.049527e-08
1.34651.6048856.244074e-08
1.353121.6048016.439576e-08
1.359761.6047186.636038e-08
1.366441.6046346.833465e-08
1.373141.6045497.031861e-08
1.379891.6044657.231231e-08
1.386661.604387.431580e-08
1.393471.6042957.632912e-08
1.41.6042137.826000e-08
1.400311.6042097.823746e-08
1.407191.6041247.774112e-08
1.41411.6040387.724234e-08
1.421041.6039517.674112e-08
1.428021.6038647.623743e-08
1.435031.6037777.573127e-08
1.442071.6036897.522262e-08
1.449161.6036017.471148e-08
1.456271.6035137.419783e-08
1.463421.6034247.368165e-08
1.470611.6033357.316294e-08
1.477831.6032457.264169e-08
1.485081.6031557.211787e-08
1.492371.6030657.159148e-08
1.49971.6029747.106251e-08
1.507071.6028827.053094e-08
1.514471.6027916.999677e-08
1.52191.6026986.945996e-08
1.529371.6026056.892053e-08
1.536881.6025126.837844e-08
1.544431.6024186.783369e-08
1.552011.6023246.728627e-08
1.559631.6022296.673616e-08
1.567291.6021336.618335e-08
1.574991.6020376.562782e-08
1.582721.6019416.506957e-08
1.590491.6018436.450858e-08
1.59831.6017466.394483e-08
1.61.6017246.382200e-08
1.606151.6016476.628468e-08
1.614031.6015486.944457e-08
1.621961.6014497.261997e-08
1.629921.6013497.581096e-08
1.637921.6012487.901761e-08
1.645971.6011468.224002e-08
1.654051.6010448.547824e-08
1.662171.6009418.873236e-08
1.670331.6008389.200246e-08
1.678531.6007349.528862e-08
1.686771.6006299.859091e-08
1.695051.6005231.019094e-07
1.703381.6004171.052442e-07
1.711741.600311.085954e-07
1.720151.6002021.119630e-07
1.728591.6000941.153472e-07
1.737081.5999841.187480e-07
1.745611.5998741.221654e-07
1.754181.5997631.255997e-07
1.762791.5996511.290508e-07
1.771451.5995391.325189e-07
1.780141.5994261.360040e-07
1.788881.5993111.395062e-07
1.797671.5991961.430256e-07
1.81.5991661.439600e-07
1.806491.599081.497264e-07
1.815361.5989631.576019e-07
1.824281.5988461.655160e-07
1.833231.5987271.734691e-07
1.842241.5986071.814611e-07
1.851281.5984871.894925e-07
1.860371.5983661.975632e-07
1.869511.5982432.056736e-07
1.878681.598122.138238e-07
1.887911.5979952.220140e-07
1.897181.597872.302444e-07
1.906491.5977442.385153e-07
1.915851.5976162.468267e-07
1.925261.5974882.551790e-07
1.934711.5973582.635723e-07
1.944211.5972272.720067e-07
1.953761.5970962.804826e-07
1.963351.5969632.890001e-07
1.972991.5968292.975595e-07
1.982681.5966943.061608e-07
1.992411.5965583.148044e-07
21.5964513.215400e-07
2.00221.596423.303154e-07
2.012031.5962823.695870e-07
2.021911.5961424.090515e-07
2.031831.5960014.487098e-07
2.041811.5958584.885628e-07
2.051841.5957155.286114e-07
2.061911.595575.688567e-07
2.072031.5954246.092996e-07
2.082211.5952776.499411e-07
2.092431.5951286.907821e-07
2.10271.5949787.318236e-07
2.113031.5948277.730667e-07
2.12341.5946748.145122e-07
2.133831.594528.561613e-07
2.144311.5943648.980148e-07
2.154831.5942079.400739e-07
2.165411.5940499.823394e-07
2.176051.5938891.024812e-06
2.186731.5937281.067494e-06
2.197471.5935651.110385e-06
2.21.5935271.120500e-06
2.208261.5934011.184050e-06
2.21911.5932351.267493e-06
2.231.5930671.351346e-06
2.240941.5928981.435611e-06
2.251951.5927281.520290e-06
2.2631.5925551.605384e-06
2.274121.5923811.690896e-06
2.285281.5922061.776828e-06
2.29651.5920291.863182e-06
2.307781.591851.949960e-06
2.319111.5916692.037164e-06
2.33051.5914862.124797e-06
2.341941.5913022.212859e-06
2.353441.5911162.301354e-06
2.364991.5909282.390283e-06
2.37661.5907392.479649e-06
2.388271.5905472.569454e-06
2.41.5903542.659700e-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
—