Optical constants

Refractive index of S-TIM2 (OHARA)

S-TIM2: n,k 0.36–2.4 µm

Data
formula 2 + tabulated k
Range
0.36–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.36–2.4 µm
Refractive index n
1.62004
Extinction coefficient k
1.40486e-08
Permittivity ε1
2.62452
Permittivity ε2
4.55186e-08
Absorption coefficient α
0.00300443 cm⁻¹
Penetration depth δ = λ/(2πk)
6.65683e+09 nm
Abbe number Vd
36.263
Chromatic dispersion dn/dλ
-0.0865836 µm⁻¹
Group index ng
1.67091
Group velocity dispersion
168.41 fs²/mm
Dispersion parameter D
-918.764 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-TIM2 (OHARA): S-TIM2
ohara_s_tim2 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-TIM2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_tim2.range_nm)  # (360, 2400) nm
eps = ohara_s_tim2.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=1.42193846λ2λ2−0.0107291511+0.133827968λ2λ2−0.0572587546+1.45060574λ2λ2−145.381805

Valid from 0.36 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.42193846
C30.0107291511
C40.133827968
C50.0572587546
C61.45060574
C7145.381805

Comments and conditions

Recommended - Lightweight

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 1.62e-07 1.19e-08 -3.5e-11 6.49e-07 8.6e-10 0.291
nd
1.620041
Vd
36.263378
glass code
620363
density
value: 2690
thermal expansion
value: 8.1e-06, temperature range: 243 343; value: 9.5e-06, temperature range: 293 573
dPgF
0.0051
resistance
acid: 1.0; climatic: 2.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 1.11e-06 K⁻¹ at 633 nm, dn/dT = 2.72e-07 K⁻¹ at 1310 nm, dn/dT = 2.14e-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 422 wavelengths, the same grid as the API and the library
S-TIM2 (OHARA), S-TIM2: n and k versus wavelength
λ (µm)nk
0.361.6699527.235700e-06
0.3617161.6690186.408977e-06
0.363441.6681015.578313e-06
0.3651721.66724.743691e-06
0.3669121.6663153.905091e-06
0.3686611.6654453.062494e-06
0.371.6647922.417300e-06
0.3704181.664592.356034e-06
0.3721831.663752.097289e-06
0.3739571.6629241.837311e-06
0.375741.6621121.576095e-06
0.377531.6613131.313633e-06
0.379331.6605271.049920e-06
0.381.6602399.516700e-07
0.3811381.6597548.925789e-07
0.3829541.6589947.982170e-07
0.3847791.6582467.034053e-07
0.3866131.6575096.081417e-07
0.3884561.6567845.124241e-07
0.391.6561884.322000e-07
0.3903071.6560714.247694e-07
0.3921671.6553693.797505e-07
0.3940361.6546773.345171e-07
0.3959141.6539962.890681e-07
0.3978011.6533252.434025e-07
0.3996971.6526651.975192e-07
0.41.6525611.901900e-07
0.4016021.6520141.809106e-07
0.4035161.6513731.698245e-07
0.4054391.6507421.586855e-07
0.4073721.650121.474935e-07
0.4093131.6495061.362481e-07
0.4112641.6489021.249491e-07
0.4132241.6483061.135963e-07
0.4151931.6477191.021894e-07
0.4171721.647149.072806e-08
0.4191611.646577.921213e-08
0.421.6463327.435000e-08
0.4211581.6460077.269756e-08
0.4231661.6454526.983393e-08
0.4251821.6449056.695664e-08
0.4272091.6443656.406565e-08
0.4292451.6438336.116087e-08
0.4312911.6433085.824226e-08
0.4333461.642795.530973e-08
0.4354111.6422795.236322e-08
0.4374871.6417754.940267e-08
0.4395721.6412784.642802e-08
0.441.6411774.581700e-08
0.4416671.6407874.506473e-08
0.4437721.6403034.411464e-08
0.4458871.6398254.316003e-08
0.4480121.6393534.220086e-08
0.4501471.6388884.123713e-08
0.4522921.6384284.026880e-08
0.4544481.6379743.929586e-08
0.4566141.6375263.831828e-08
0.458791.6370843.733604e-08
0.461.6368423.679000e-08
0.4609771.6366483.649163e-08
0.4631741.6362173.582055e-08
0.4653811.6357913.514628e-08
0.4675991.6353713.446878e-08
0.4698281.6349553.378806e-08
0.4720671.6345453.310410e-08
0.4743171.6341413.241687e-08
0.4765781.6337413.172637e-08
0.4788491.6333453.103258e-08
0.481.6331483.068100e-08
0.4811311.6329553.030002e-08
0.4834241.632572.952772e-08
0.4857281.6321892.875173e-08
0.4880431.6318122.797204e-08
0.4903691.6314412.718864e-08
0.4927061.6310732.640150e-08
0.4950551.630712.561061e-08
0.4974141.6303512.481596e-08
0.4997851.6299972.401751e-08
0.51.6299652.394500e-08
0.5021671.6296472.347721e-08
0.504561.62932.296049e-08
0.5069651.6289582.244131e-08
0.5093811.628622.191965e-08
0.5118091.6282852.139551e-08
0.5142481.6279552.086887e-08
0.5166991.6276282.033972e-08
0.5191611.6273051.980804e-08
0.5216361.6269861.927384e-08
0.5241221.626671.873708e-08
0.526621.6263581.819777e-08
0.529131.6260491.765589e-08
0.5316521.6257441.711143e-08
0.5341851.6254421.656437e-08
0.5367311.6251431.601470e-08
0.5392891.6248481.546241e-08
0.541861.6245561.490749e-08
0.5444421.6242681.434993e-08
0.5470371.6239821.378971e-08
0.5496441.62371.322682e-08
0.551.6236611.315000e-08
0.5522641.623421.320410e-08
0.5548961.6231441.326701e-08
0.5575411.622871.333022e-08
0.5601981.62261.339373e-08
0.5628681.6223321.345754e-08
0.565551.6220681.352165e-08
0.5682461.6218061.358607e-08
0.5709541.6215471.365080e-08
0.5736751.621291.371584e-08
0.5764091.6210371.378118e-08
0.5791561.6207861.384684e-08
0.5819171.6205371.391281e-08
0.584691.6202911.397909e-08
0.5874771.6200481.404570e-08
0.5902771.6198071.411261e-08
0.593091.6195691.417985e-08
0.5959171.6193331.424741e-08
0.5987571.61911.431529e-08
0.61.6189991.434500e-08
0.601611.6188691.455072e-08
0.6044781.618641.491699e-08
0.6073591.6184141.528500e-08
0.6102531.618191.565477e-08
0.6131621.6179681.602630e-08
0.6160841.6177481.639959e-08
0.619021.617531.677467e-08
0.6219711.6173151.715154e-08
0.6249351.6171021.753020e-08
0.6279131.6168911.791067e-08
0.6309061.6166821.829295e-08
0.6339131.6164751.867705e-08
0.6369341.616271.906298e-08
0.639971.6160671.945075e-08
0.643021.6158651.984037e-08
0.6460851.6156662.023185e-08
0.6491641.6154692.062519e-08
0.651.6154162.073200e-08
0.6522581.6152742.055156e-08
0.6553661.615082.030311e-08
0.658491.6148882.005348e-08
0.6616281.6146991.980267e-08
0.6647821.614511.955065e-08
0.667951.6143241.929744e-08
0.6711331.6141391.904302e-08
0.6743321.6139561.878738e-08
0.6775461.6137751.853053e-08
0.6807751.6135961.827245e-08
0.684021.6134181.801314e-08
0.687281.6132411.775260e-08
0.6905551.6130661.749082e-08
0.6938471.6128931.722779e-08
0.6971531.6127221.696350e-08
0.71.6125761.673600e-08
0.7004761.6125511.668665e-08
0.7038151.6123831.634056e-08
0.7071691.6122161.599283e-08
0.7105391.612051.564344e-08
0.7139261.6118861.529238e-08
0.7173281.6117231.493965e-08
0.7207471.6115621.458523e-08
0.7241821.6114021.422913e-08
0.7276341.6112431.387133e-08
0.7311021.6110861.351183e-08
0.7345861.610931.315061e-08
0.7380871.6107751.278767e-08
0.7416051.6106221.242300e-08
0.7451391.6104691.205660e-08
0.7486911.6103191.168844e-08
0.7522591.6101691.131854e-08
0.7558441.6100211.094686e-08
0.7594461.6098731.057342e-08
0.7630661.6097271.019820e-08
0.7667031.6095829.821190e-09
0.7703571.6094399.442383e-09
0.7740281.6092969.061770e-09
0.7777171.6091558.679344e-09
0.7814241.6090148.295094e-09
0.7851481.6088757.909014e-09
0.788891.6087377.521093e-09
0.792651.60867.131324e-09
0.7964281.6084646.739697e-09
0.81.6083366.369400e-09
0.8002241.6083296.371182e-09
0.8040381.6081946.401548e-09
0.807871.6080616.432058e-09
0.811721.6079296.462715e-09
0.8155891.6077986.493517e-09
0.8194761.6076686.524466e-09
0.8233811.6075396.555563e-09
0.8273061.607416.586807e-09
0.8312491.6072836.618201e-09
0.835211.6071566.649745e-09
0.8391911.6070316.681438e-09
0.8431911.6069066.713283e-09
0.8472091.6067826.745280e-09
0.8512471.6066596.777429e-09
0.8553041.6065376.809731e-09
0.859381.6064156.842187e-09
0.8634761.6062946.874798e-09
0.8675921.6061746.907564e-09
0.8717271.6060556.940487e-09
0.8758811.6059376.973566e-09
0.8800561.6058197.006803e-09
0.884251.6057027.040198e-09
0.8884641.6055867.073753e-09
0.8926991.6054717.107468e-09
0.8969531.6053567.141343e-09
0.91.6052757.165600e-09
0.9012281.6052427.175378e-09
0.9055241.6051297.209573e-09
0.9098391.6050167.243930e-09
0.9141761.6049047.278452e-09
0.9185331.6047927.313137e-09
0.922911.6046817.347989e-09
0.9273091.6045717.383006e-09
0.9317281.6044617.418190e-09
0.9361691.6043527.453542e-09
0.9406311.6042447.489062e-09
0.9451141.6041367.524752e-09
0.9496181.6040297.560611e-09
0.9541441.6039227.596642e-09
0.9586921.6038157.632844e-09
0.9632611.603717.669219e-09
0.9678521.6036047.705767e-09
0.9724641.60357.742490e-09
0.9770991.6033957.779387e-09
0.9817561.6032927.816460e-09
0.9864351.6031887.853710e-09
0.9911371.6030857.891138e-09
0.995861.6029837.928744e-09
11.6028947.961700e-09
1.000611.6028817.966530e-09
1.005381.6027798.004500e-09
1.010171.6026788.042650e-09
1.014981.6025788.080983e-09
1.019821.6024778.119499e-09
1.024681.6023778.158198e-09
1.029561.6022788.197081e-09
1.034471.6021788.236150e-09
1.03941.602088.275405e-09
1.044351.6019818.314847e-09
1.049331.6018838.354477e-09
1.054331.6017858.394296e-09
1.059361.6016878.434305e-09
1.064411.601598.474504e-09
1.069481.6014938.514895e-09
1.074581.6013978.555479e-09
1.07971.60138.596256e-09
1.084841.6012048.637227e-09
1.090011.6011088.678393e-09
1.095211.6010128.719756e-09
1.100431.6009178.761316e-09
1.105671.6008228.803074e-09
1.110941.6007278.845031e-09
1.116241.6006328.887188e-09
1.121561.6005388.929545e-09
1.12691.6004438.972105e-09
1.132271.6003499.014868e-09
1.137671.6002559.057834e-09
1.143091.6001619.101005e-09
1.148541.6000689.144382e-09
1.154011.5999749.187966e-09
1.159511.5998819.231757e-09
1.165041.5997879.275757e-09
1.170591.5996949.319967e-09
1.176171.5996019.364387e-09
1.181781.5995089.409020e-09
1.187411.5994159.453865e-09
1.193071.5993229.498923e-09
1.198761.599239.544197e-09
1.21.5992099.554100e-09
1.204471.5991371.058855e-08
1.210211.5990441.191719e-08
1.215981.5989521.325216e-08
1.221771.5988591.459349e-08
1.22761.5987661.594122e-08
1.233451.5986741.729537e-08
1.239331.5985811.865597e-08
1.245231.5984892.002306e-08
1.251171.5983962.139666e-08
1.257131.5983042.277681e-08
1.263121.5982112.416354e-08
1.269141.5981182.555688e-08
1.275191.5980262.695685e-08
1.281271.5979332.836350e-08
1.287371.597842.977686e-08
1.293511.5977473.119695e-08
1.299671.5976543.262381e-08
1.305871.5975613.405746e-08
1.312091.5974683.549796e-08
1.318351.5973753.694531e-08
1.324631.5972813.839957e-08
1.330941.5971883.986075e-08
1.337291.5970944.132890e-08
1.343661.5974.280405e-08
1.350061.5969064.428623e-08
1.35651.5968124.577547e-08
1.362961.5967184.727181e-08
1.369461.5966234.877528e-08
1.375991.5965285.028592e-08
1.382541.5964335.180375e-08
1.389131.5963385.332882e-08
1.395751.5962435.486116e-08
1.41.5961825.584400e-08
1.402411.5961475.593996e-08
1.409091.5960515.620658e-08
1.415811.5959555.647448e-08
1.422551.5958595.674364e-08
1.429331.5957625.701409e-08
1.436151.5956655.728583e-08
1.442991.5955685.755887e-08
1.449871.5954715.783320e-08
1.456781.5953735.810884e-08
1.463721.5952755.838580e-08
1.47071.5951765.866408e-08
1.477711.5950775.894368e-08
1.484751.5949785.922462e-08
1.491821.5948785.950689e-08
1.498931.5947795.979051e-08
1.506081.5946786.007548e-08
1.513261.5945786.036181e-08
1.520471.5944766.064951e-08
1.527721.5943756.093857e-08
1.5351.5942736.122902e-08
1.542311.5941716.152084e-08
1.549661.5940686.181406e-08
1.557051.5939656.210868e-08
1.564471.5938616.240470e-08
1.571931.5937576.270213e-08
1.579421.5936526.300098e-08
1.586951.5935476.330125e-08
1.594511.5934426.360295e-08
1.61.5933656.382200e-08
1.602111.5933356.558462e-08
1.609741.5932297.196872e-08
1.617421.5931227.838325e-08
1.625121.5930148.482835e-08
1.632871.5929059.130416e-08
1.640651.5927979.781084e-08
1.648471.5926871.043485e-07
1.656331.5925771.109174e-07
1.664221.5924661.175175e-07
1.672151.5923551.241491e-07
1.680121.5922431.308124e-07
1.688131.5921311.375073e-07
1.696181.5920181.442342e-07
1.704261.5919041.509932e-07
1.712381.5917891.577843e-07
1.720541.5916741.646078e-07
1.728741.5915581.714639e-07
1.736981.5914421.783526e-07
1.745261.5913251.852742e-07
1.753581.5912071.922287e-07
1.761941.5910881.992164e-07
1.770331.5909692.062374e-07
1.778771.5908482.132918e-07
1.787251.5907272.203799e-07
1.795771.5906052.275018e-07
1.81.5905452.310400e-07
1.804331.5904832.361744e-07
1.812931.5903592.463789e-07
1.821571.5902352.566320e-07
1.830251.590112.669340e-07
1.838971.5899842.772852e-07
1.847741.5898572.876856e-07
1.856541.589732.981357e-07
1.865391.5896013.086355e-07
1.874281.5894723.191854e-07
1.883211.5893413.297855e-07
1.892191.589213.404362e-07
1.901211.5890783.511376e-07
1.910271.5889453.618900e-07
1.919371.588813.726937e-07
1.928521.5886753.835489e-07
1.937711.5885393.944558e-07
1.946951.5884024.054147e-07
1.956231.5882644.164258e-07
1.965551.5881244.274894e-07
1.974921.5879844.386058e-07
1.984331.5878434.497751e-07
1.993791.58774.609976e-07
21.5876064.683700e-07
2.003291.5875564.815635e-07
2.012841.5874125.198560e-07
2.022431.5872665.583310e-07
2.032071.5871195.969893e-07
2.041751.5869716.358319e-07
2.051491.5868216.748596e-07
2.061261.5866717.140733e-07
2.071091.5865197.534739e-07
2.080961.5863667.930623e-07
2.090881.5862128.328394e-07
2.100841.5860568.728060e-07
2.110851.5858999.129631e-07
2.120911.5857419.533117e-07
2.131021.5855829.938525e-07
2.141181.5854211.034587e-06
2.151381.5852591.075515e-06
2.161641.5850951.116638e-06
2.171941.5849311.157957e-06
2.182291.5847641.199473e-06
2.192691.5845971.241187e-06
2.21.5844781.270500e-06
2.203141.5844271.277520e-06
2.213641.5842571.300983e-06
2.224191.5840851.324557e-06
2.234791.5839111.348244e-06
2.245441.5837361.372044e-06
2.256151.5835591.395957e-06
2.26691.5833811.419984e-06
2.27771.5832011.444126e-06
2.288561.583021.468383e-06
2.299471.5828371.492755e-06
2.310421.5826521.517243e-06
2.321441.5824661.541849e-06
2.33251.5822781.566571e-06
2.343621.5820881.591411e-06
2.354791.5818971.616370e-06
2.366011.5817041.641448e-06
2.377291.5815091.666645e-06
2.388621.5813121.691962e-06
2.41.5811141.717400e-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
—