Optical constants

Refractive index of S-BSM28 (OHARA)

S-BSM28: 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
1.61772
Extinction coefficient k
1.76522e-08
Permittivity ε1
2.61702
Permittivity ε2
5.71127e-08
Absorption coefficient α
0.00377509 cm⁻¹
Penetration depth δ = λ/(2πk)
5.29788e+09 nm
Abbe number Vd
49.815
Chromatic dispersion dn/dλ
-0.0635546 µm⁻¹
Group index ng
1.65506
Group velocity dispersion
116.524 fs²/mm
Dispersion parameter D
-635.703 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-BSM28 (OHARA): S-BSM28
ohara_s_bsm28 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-BSM28", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_bsm28.range_nm)  # (340, 2400) nm
eps = ohara_s_bsm28.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=1.43822841λ2λ2−0.0085977975+0.128100017λ2λ2−0.0408617854+1.3435553λ2λ2−143.70989

Valid from 0.34 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.43822841
C30.0085977975
C40.128100017
C50.0408617854
C61.3435553
C7143.70989

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -2.01e-06 1.24e-08 -3.72e-11 4.79e-07 4.64e-10 0.264
nd
1.617722
Vd
49.815052
glass code
618498
density
value: 3230
thermal expansion
value: 8.4e-06, temperature range: 243 343; value: 9.6e-06, temperature range: 293 573
dPgF
-0.0006
resistance
acid: 51.2; climatic: 3.0; phosphate: 3.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = -2.80e-07 K⁻¹ at 633 nm, dn/dT = -8.38e-07 K⁻¹ at 1310 nm, dn/dT = -8.76e-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 424 wavelengths, the same grid as the API and the library
S-BSM28 (OHARA), S-BSM28: n and k versus wavelength
λ (µm)nk
0.341.6585681.058500e-05
0.3416691.6578819.481503e-06
0.3433471.6572058.372588e-06
0.3450331.6565387.258229e-06
0.3467271.6558826.138398e-06
0.3484291.6552355.013068e-06
0.351.6546493.974800e-06
0.350141.6545973.943851e-06
0.3518591.6539693.563983e-06
0.3535871.6533493.182249e-06
0.3553231.6527382.798642e-06
0.3570681.6521362.413150e-06
0.3588211.6515432.025767e-06
0.361.651151.765200e-06
0.3605831.6509581.714015e-06
0.3623531.650381.558457e-06
0.3641321.6498111.402135e-06
0.365921.649251.245045e-06
0.3677171.6486971.087184e-06
0.3695221.648159.285482e-07
0.371.6480088.865600e-07
0.3713361.6476128.337551e-07
0.373161.6470817.617169e-07
0.3749921.6465566.893249e-07
0.3768331.6460396.165775e-07
0.3786831.6455295.434729e-07
0.381.6451714.914500e-07
0.3805431.6450254.791905e-07
0.3824111.6445284.369785e-07
0.3842891.6440383.945593e-07
0.3861761.6435543.519318e-07
0.3880721.6430763.090950e-07
0.3899771.6426042.660479e-07
0.391.6425992.655300e-07
0.3918921.6421392.461840e-07
0.3938161.6416792.265074e-07
0.395751.6412262.067342e-07
0.3976931.6407781.868639e-07
0.3996451.6403361.668961e-07
0.41.6402561.632700e-07
0.4016081.6398991.569479e-07
0.403581.6394681.491934e-07
0.4055611.6390421.414008e-07
0.4075521.6386221.335699e-07
0.4095531.6382061.257007e-07
0.4115641.6377961.177927e-07
0.4135851.6373911.098460e-07
0.4156161.6369911.018602e-07
0.4176561.6365969.383524e-08
0.4197071.6362068.577087e-08
0.421.636158.461900e-08
0.4217681.635828.276100e-08
0.4238391.6354398.058453e-08
0.425921.6350637.839737e-08
0.4280111.6346917.619947e-08
0.4301121.6343237.399077e-08
0.4322241.633967.177124e-08
0.4343471.6336026.954080e-08
0.4364791.6332476.729942e-08
0.4386221.6328976.504703e-08
0.441.6326756.359900e-08
0.4407761.6325516.298995e-08
0.442941.6322096.129106e-08
0.4451151.631875.958383e-08
0.44731.6315365.786822e-08
0.4494971.6312065.614418e-08
0.4517041.6308795.441168e-08
0.4539211.6305575.267068e-08
0.456151.6302385.092112e-08
0.458391.6299224.916297e-08
0.461.6296994.789900e-08
0.4606411.6296114.759443e-08
0.4629021.6293024.651898e-08
0.4651751.6289984.543825e-08
0.4674591.6286964.435222e-08
0.4697541.6283994.326085e-08
0.4720611.6281044.216412e-08
0.4743791.6278134.106201e-08
0.4767081.6275253.995448e-08
0.4790481.627243.884152e-08
0.481.6271263.838900e-08
0.48141.6269593.765805e-08
0.4837641.626683.642434e-08
0.4861391.6264053.518457e-08
0.4885261.6261323.393872e-08
0.4909251.6258633.268674e-08
0.4933351.6255973.142863e-08
0.4957581.6253333.016433e-08
0.4981921.6250722.889383e-08
0.51.6248812.795000e-08
0.5006381.6248152.776120e-08
0.5030961.624562.703360e-08
0.5055661.6243072.630243e-08
0.5080481.6240582.556767e-08
0.5105431.6238112.482930e-08
0.513051.6235662.408730e-08
0.5155691.6233252.334166e-08
0.51811.6230862.259236e-08
0.5206441.6228492.183938e-08
0.52321.6226152.108271e-08
0.5257691.6223832.032231e-08
0.5283511.6221541.955819e-08
0.5309451.6219271.879031e-08
0.5335521.6217031.801866e-08
0.5361721.6214811.724323e-08
0.5388041.6212611.646399e-08
0.541451.6210431.568092e-08
0.5441081.6208281.489400e-08
0.546781.6206151.410322e-08
0.5494641.6204041.330856e-08
0.551.6203621.315000e-08
0.5521621.6201951.340890e-08
0.5548731.6199891.373352e-08
0.5575981.6197841.405974e-08
0.5603351.6195821.438756e-08
0.5630871.6193811.471700e-08
0.5658511.6191831.504804e-08
0.568631.6189861.538072e-08
0.5714221.6187921.571503e-08
0.5742271.6185991.605098e-08
0.5770471.6184091.638857e-08
0.579881.618221.672783e-08
0.5827271.6180331.706875e-08
0.5855881.6178481.741135e-08
0.5884641.6176651.775563e-08
0.5913531.6174831.810159e-08
0.5942561.6173031.844926e-08
0.5971741.6171251.879864e-08
0.61.6169561.913700e-08
0.6001061.6169491.914039e-08
0.6030531.6167751.923438e-08
0.6060141.6166021.932884e-08
0.6089891.616431.942376e-08
0.6119791.6162611.951914e-08
0.6149841.6160931.961499e-08
0.6180041.6159261.971132e-08
0.6210381.6157611.980811e-08
0.6240871.6155981.990539e-08
0.6271521.6154362.000313e-08
0.6302311.6152762.010136e-08
0.6333251.6151172.020008e-08
0.6364351.614962.029927e-08
0.639561.6148042.039895e-08
0.64271.6146492.049913e-08
0.6458561.6144962.059979e-08
0.6490271.6143442.070095e-08
0.651.6142982.073200e-08
0.6522131.6141942.055511e-08
0.6554161.6140452.029918e-08
0.6586341.6138972.004199e-08
0.6618681.6137511.978354e-08
0.6651171.6136051.952382e-08
0.6683831.6134621.926283e-08
0.6716651.6133191.900055e-08
0.6749631.6131781.873699e-08
0.6782771.6130381.847213e-08
0.6816071.6128991.820597e-08
0.6849541.6127611.793850e-08
0.6883171.6126241.766973e-08
0.6916961.6124891.739963e-08
0.6950931.6123551.712820e-08
0.6985051.6122221.685545e-08
0.71.6121641.673600e-08
0.7019351.612091.678227e-08
0.7053821.6119591.686467e-08
0.7088451.6118291.694748e-08
0.7123251.61171.703070e-08
0.7158231.6115721.711432e-08
0.7193371.6114461.719836e-08
0.7228691.611321.728281e-08
0.7264191.6111951.736767e-08
0.7299851.6110721.745295e-08
0.7335691.6109491.753865e-08
0.7371711.6108271.762477e-08
0.7407911.6107071.771131e-08
0.7444281.6105871.779827e-08
0.7480831.6104681.788567e-08
0.7517561.610351.797349e-08
0.7554471.6102331.806174e-08
0.7591561.6101171.815043e-08
0.7628841.6100011.823955e-08
0.766631.6098871.832911e-08
0.7703941.6097731.841911e-08
0.7741761.609661.850956e-08
0.7779781.6095481.860044e-08
0.7817971.6094371.869177e-08
0.7856361.6093271.878356e-08
0.7894931.6092171.887579e-08
0.793371.6091081.896847e-08
0.7972651.6091.906161e-08
0.81.6089251.912700e-08
0.801181.6088931.915521e-08
0.8051131.6087861.924926e-08
0.8090671.608681.934378e-08
0.8130391.6085751.943876e-08
0.8170311.608471.953421e-08
0.8210431.6083671.963013e-08
0.8250741.6082631.972652e-08
0.8291251.6081611.982338e-08
0.8331961.6080591.992071e-08
0.8372871.6079582.001853e-08
0.8413981.6078572.011682e-08
0.8455291.6077572.021560e-08
0.8496811.6076582.031486e-08
0.8538531.6075592.041461e-08
0.8580451.6074612.051485e-08
0.8622581.6073642.061559e-08
0.8664921.6072672.071681e-08
0.8707461.607172.081854e-08
0.8750211.6070742.092076e-08
0.8793181.6069792.102348e-08
0.8836351.6068842.112671e-08
0.8879741.606792.123045e-08
0.8923341.6066962.133469e-08
0.8967151.6066022.143945e-08
0.91.6065332.151800e-08
0.9011181.6065092.163398e-08
0.9055421.6064172.209311e-08
0.9099881.6063252.255448e-08
0.9144561.6062342.301813e-08
0.9189461.6061432.348405e-08
0.9234581.6060522.395226e-08
0.9279921.6059622.442277e-08
0.9325491.6058722.489558e-08
0.9371281.6057832.537072e-08
0.9417291.6056942.584820e-08
0.9463531.6056052.632801e-08
0.9509991.6055172.681018e-08
0.9556691.6054292.729472e-08
0.9603611.6053422.778164e-08
0.9650761.6052552.827095e-08
0.9698151.6051682.876267e-08
0.9745761.6050812.925679e-08
0.9793621.6049952.975334e-08
0.984171.604913.025233e-08
0.9890021.6048243.075378e-08
0.9938581.6047393.125768e-08
0.9987381.6046543.176405e-08
11.6046323.189500e-08
1.003641.6045693.201116e-08
1.008571.6044853.216833e-08
1.013521.6044013.232628e-08
1.01851.6043173.248500e-08
1.02351.6042333.264450e-08
1.028521.604153.280478e-08
1.033571.6040673.296585e-08
1.038651.6039843.312771e-08
1.043751.6039013.329037e-08
1.048871.6038193.345382e-08
1.054021.6037363.361808e-08
1.05921.6036543.378314e-08
1.06441.6035723.394901e-08
1.069631.603493.411570e-08
1.074881.6034093.428321e-08
1.080151.6033273.445154e-08
1.085461.6032463.462069e-08
1.090791.6031643.479068e-08
1.096141.6030833.496150e-08
1.101531.6030023.513316e-08
1.106931.6029213.530566e-08
1.112371.6028413.547901e-08
1.117831.602763.565321e-08
1.123321.6026793.582827e-08
1.128831.6025993.600418e-08
1.134381.6025183.618096e-08
1.139951.6024383.635861e-08
1.145541.6023573.653713e-08
1.151171.6022773.671652e-08
1.156821.6021973.689680e-08
1.16251.6021163.707796e-08
1.168211.6020363.726001e-08
1.173941.6019563.744296e-08
1.179711.6018763.762680e-08
1.18551.6017953.781155e-08
1.191321.6017153.799720e-08
1.197171.6016353.818376e-08
1.21.6015963.827400e-08
1.203051.6015543.871261e-08
1.208961.6014743.956238e-08
1.214891.6013934.041632e-08
1.220861.6013134.127446e-08
1.226851.6012324.213681e-08
1.232871.6011524.300339e-08
1.238931.6010714.387422e-08
1.245011.600994.474934e-08
1.251121.6009094.562874e-08
1.257271.6008284.651247e-08
1.263441.6007474.740054e-08
1.269641.6006664.829296e-08
1.275881.6005844.918977e-08
1.282141.6005035.009098e-08
1.288441.6004215.099662e-08
1.294761.6003395.190670e-08
1.301121.6002575.282125e-08
1.307511.6001755.374030e-08
1.313931.6000925.466385e-08
1.320381.600015.559194e-08
1.326861.5999275.652458e-08
1.333381.5998445.746181e-08
1.339931.5997615.840364e-08
1.34651.5996775.935009e-08
1.353121.5995946.030119e-08
1.359761.599516.125695e-08
1.366441.5994266.221741e-08
1.373141.5993416.318259e-08
1.379891.5992566.415251e-08
1.386661.5991716.512718e-08
1.393471.5990866.610665e-08
1.41.5990046.704600e-08
1.400311.5990016.704097e-08
1.407191.5989156.693013e-08
1.41411.5988286.681876e-08
1.421041.5987426.670683e-08
1.428021.5986556.659436e-08
1.435031.5985686.648134e-08
1.442071.598486.636775e-08
1.449161.5983926.625362e-08
1.456271.5983046.613892e-08
1.463421.5982156.602366e-08
1.470611.5981266.590783e-08
1.477831.5980376.579143e-08
1.485081.5979476.567447e-08
1.492371.5978576.555692e-08
1.49971.5977666.543880e-08
1.507071.5976756.532010e-08
1.514471.5975836.520082e-08
1.52191.5974916.508096e-08
1.529371.5973996.496050e-08
1.536881.5973066.483945e-08
1.544431.5972126.471781e-08
1.552011.5971196.459557e-08
1.559631.5970246.447273e-08
1.567291.5969296.434929e-08
1.574991.5968346.422524e-08
1.582721.5967386.410058e-08
1.590491.5966416.397531e-08
1.59831.5965446.384943e-08
1.61.5965236.382200e-08
1.606151.5964466.717495e-08
1.614031.5963487.147713e-08
1.621961.5962497.580044e-08
1.629921.596158.014498e-08
1.637921.596058.451085e-08
1.645971.5959498.889815e-08
1.654051.5958489.330700e-08
1.662171.5957469.773749e-08
1.670331.5956431.021897e-07
1.678531.595541.066638e-07
1.686771.5954361.111599e-07
1.695051.5953321.156781e-07
1.703381.5952261.202184e-07
1.711741.595121.247810e-07
1.720151.5950141.293661e-07
1.728591.5949061.339736e-07
1.737081.5947981.386038e-07
1.745611.5946891.432567e-07
1.754181.594581.479324e-07
1.762791.5944691.526311e-07
1.771451.5943581.573529e-07
1.780141.5942461.620978e-07
1.788881.5941331.668661e-07
1.797671.5940191.716578e-07
1.81.5939891.729300e-07
1.806491.5939051.788113e-07
1.815361.593791.868438e-07
1.824281.5936731.949158e-07
1.833231.5935562.030273e-07
1.842241.5934382.111787e-07
1.851281.5933192.193701e-07
1.860371.59322.276018e-07
1.869511.5930792.358738e-07
1.878681.5929572.441865e-07
1.887911.5928352.525400e-07
1.897181.5927112.609345e-07
1.906491.5925872.693702e-07
1.915851.5924612.778474e-07
1.925261.5923342.863661e-07
1.934711.5922072.949267e-07
1.944211.5920783.035293e-07
1.953761.5919493.121742e-07
1.963351.5918183.208615e-07
1.972991.5916863.295914e-07
1.982681.5915533.383643e-07
1.992411.5914193.471801e-07
21.5913143.540500e-07
2.00221.5912843.612425e-07
2.012031.5911483.934307e-07
2.021911.591014.257769e-07
2.031831.5908724.582819e-07
2.041811.5907324.909465e-07
2.051841.5905915.237715e-07
2.061911.5904495.567577e-07
2.072031.5903055.899058e-07
2.082211.590166.232167e-07
2.092431.5900146.566911e-07
2.10271.5898676.903299e-07
2.113031.5897197.241339e-07
2.12341.5895697.581038e-07
2.133831.5894187.922406e-07
2.144311.5892658.265449e-07
2.154831.5891118.610177e-07
2.165411.5889568.956597e-07
2.176051.5887999.304718e-07
2.186731.5886419.654549e-07
2.197471.5884811.000610e-06
2.21.5884431.008900e-06
2.208261.588321.068044e-06
2.21911.5881571.145703e-06
2.231.5879931.223744e-06
2.240941.5878281.302167e-06
2.251951.587661.380976e-06
2.2631.5874921.460171e-06
2.274121.5873211.539756e-06
2.285281.5871491.619731e-06
2.29651.5869761.700098e-06
2.307781.5868011.780861e-06
2.319111.5866241.862020e-06
2.33051.5864451.943577e-06
2.341941.5862652.025535e-06
2.353441.5860832.107895e-06
2.364991.5858992.190660e-06
2.37661.5857142.273831e-06
2.388271.5855262.357410e-06
2.41.5853372.441400e-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
—