Optical constants

Refractive index of S-TIM8 (OHARA)

S-TIM8: n,k 0.35–2.4 µm

Data
formula 2 + tabulated k
Range
0.35–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.35–2.4 µm
Refractive index n
1.59551
Extinction coefficient k
1.40486e-08
Permittivity ε1
2.54564
Permittivity ε2
4.48294e-08
Absorption coefficient α
0.00300443 cm⁻¹
Penetration depth δ = λ/(2πk)
6.65683e+09 nm
Abbe number Vd
39.242
Chromatic dispersion dn/dλ
-0.0771006 µm⁻¹
Group index ng
1.64081
Group velocity dispersion
147.567 fs²/mm
Dispersion parameter D
-805.055 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-TIM8 (OHARA): S-TIM8
ohara_s_tim8 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-TIM8", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_tim8.range_nm)  # (350, 2400) nm
eps = ohara_s_tim8.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=1.37262713λ2λ2−0.0103220068+0.112636276λ2λ2−0.0550195044+1.39786421λ2λ2−147.735609

Valid from 0.35 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.37262713
C30.0103220068
C40.112636276
C50.0550195044
C61.39786421
C7147.735609

Comments and conditions

Recommended - Lightweight

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -7.53e-07 1.17e-08 -3.62e-11 5.72e-07 6.09e-10 0.291
nd
1.595509
Vd
39.242273
glass code
596392
density
value: 2630
thermal expansion
value: 8.4e-06, temperature range: 243 343; value: 1.04e-05, temperature range: 293 573
dPgF
0.0023
resistance
acid: 1.0; climatic: 2.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 5.10e-07 K⁻¹ at 633 nm, dn/dT = -1.89e-07 K⁻¹ at 1310 nm, dn/dT = -2.37e-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 423 wavelengths, the same grid as the API and the library
S-TIM8 (OHARA), S-TIM8: n and k versus wavelength
λ (µm)nk
0.351.643851.089600e-05
0.3516931.642969.686400e-06
0.3533941.6420878.470948e-06
0.3551031.6412297.249618e-06
0.3568211.6403866.022380e-06
0.3585471.6395594.789206e-06
0.361.6388763.751000e-06
0.3602811.6387453.682466e-06
0.3620241.6379453.257780e-06
0.3637751.6371592.831038e-06
0.3655351.6363872.402233e-06
0.3673031.6356271.971354e-06
0.3690791.634881.538391e-06
0.371.6344991.314000e-06
0.3708641.6341451.245987e-06
0.3726581.6334221.104852e-06
0.3744611.632719.630348e-07
0.3762721.632018.205312e-07
0.3780921.6313216.773383e-07
0.3799211.6306435.334528e-07
0.381.6306145.272300e-07
0.3817591.6299764.752960e-07
0.3836051.6293184.207638e-07
0.3854611.6286713.659678e-07
0.3873251.6280343.109067e-07
0.3891991.6274072.555794e-07
0.391.6271422.319100e-07
0.3910811.6267892.201709e-07
0.3929731.626181.996295e-07
0.3948731.625581.789889e-07
0.3967831.6249891.582484e-07
0.3987031.6244061.374075e-07
0.41.6240191.233200e-07
0.4006311.6238321.213440e-07
0.4025691.6232671.152775e-07
0.4045161.6227091.091817e-07
0.4064731.622161.030564e-07
0.4084391.6216189.690145e-08
0.4104151.6210849.071674e-08
0.41241.6205578.450212e-08
0.4143941.6200387.825743e-08
0.4163991.6195257.198254e-08
0.4184131.619026.567729e-08
0.421.6186296.070900e-08
0.4204371.6185226.030631e-08
0.422471.6180315.843150e-08
0.4245141.6175465.654763e-08
0.4265671.6170675.465464e-08
0.4286311.6165955.275250e-08
0.4307041.616135.084116e-08
0.4327871.615674.892057e-08
0.434881.6152174.699069e-08
0.4369841.6147694.505148e-08
0.4390981.6143284.310289e-08
0.441.6141424.227100e-08
0.4412221.6138924.193624e-08
0.4433561.6134614.135137e-08
0.44551.6130374.076367e-08
0.4476551.6126174.017313e-08
0.449821.6122033.957974e-08
0.4519961.6117953.898347e-08
0.4541821.6113913.838432e-08
0.4563791.6109923.778227e-08
0.4585871.6105993.717731e-08
0.461.610353.679000e-08
0.4608051.610213.654415e-08
0.4630341.6098263.586333e-08
0.4652731.6094473.517923e-08
0.4675241.6090733.449181e-08
0.4697851.6087033.380107e-08
0.4720581.6083373.310699e-08
0.4743411.6079763.240955e-08
0.4766351.607623.170873e-08
0.4789411.6072673.100453e-08
0.481.6071073.068100e-08
0.4812571.6069193.025750e-08
0.4835851.6065752.947349e-08
0.4859241.6062352.868569e-08
0.4882751.6058992.789408e-08
0.4906361.6055672.709863e-08
0.493011.6052392.629935e-08
0.4953941.6049152.549619e-08
0.4977911.6045952.468915e-08
0.51.6043042.394500e-08
0.5001981.6042782.390218e-08
0.5026181.6039652.337983e-08
0.5050491.6036562.285495e-08
0.5074921.603352.232752e-08
0.5099461.6030472.179755e-08
0.5124131.6027482.126502e-08
0.5148921.6024532.072990e-08
0.5173821.6021612.019220e-08
0.5198851.6018721.965190e-08
0.5223991.6015861.910899e-08
0.5249261.6013031.856345e-08
0.5274651.6010241.801527e-08
0.5300161.6007481.746444e-08
0.532581.6004751.691094e-08
0.5351561.6002041.635477e-08
0.5377451.5999371.579591e-08
0.5403461.5996731.523434e-08
0.5429591.5994111.467006e-08
0.5455861.5991531.410305e-08
0.5482251.5988971.353330e-08
0.551.5987271.315000e-08
0.5508761.5986441.317095e-08
0.5535411.5983941.323463e-08
0.5562181.5981461.329862e-08
0.5589091.5979011.336292e-08
0.5616121.5976581.342753e-08
0.5643291.5974191.349246e-08
0.5670581.5971811.355769e-08
0.5698011.5969461.362325e-08
0.5725571.5967141.368912e-08
0.5753271.5964841.375531e-08
0.578111.5962571.382182e-08
0.5809061.5960311.388865e-08
0.5837161.5958091.395580e-08
0.5865391.5955881.402328e-08
0.5893761.595371.409109e-08
0.5922271.5951541.415922e-08
0.5950911.594941.422769e-08
0.597971.5947281.429648e-08
0.61.594581.434500e-08
0.6008621.5945181.445514e-08
0.6037691.5943111.482640e-08
0.6066891.5941051.519945e-08
0.6096231.5939021.557431e-08
0.6125721.5937011.595097e-08
0.6155351.5935011.632947e-08
0.6185131.5933041.670979e-08
0.6215041.5931081.709195e-08
0.624511.5929151.747596e-08
0.6275311.5927231.786183e-08
0.6305661.5925341.824956e-08
0.6336161.5923461.863917e-08
0.6366811.5921591.903066e-08
0.6397611.5919751.942405e-08
0.6428551.5917921.981934e-08
0.6459651.5916122.021655e-08
0.6490891.5914322.061567e-08
0.651.5913812.073200e-08
0.6522291.5912552.055386e-08
0.6553841.5910792.030173e-08
0.6585541.5909052.004838e-08
0.6617391.5907321.979381e-08
0.664941.5905611.953800e-08
0.6681561.5903921.928095e-08
0.6713881.5902241.902266e-08
0.6746361.5900581.876313e-08
0.6778991.5898931.850233e-08
0.6811781.589731.824028e-08
0.6844731.5895681.797696e-08
0.6877831.5894081.771236e-08
0.691111.5892491.744648e-08
0.6944531.5890911.717932e-08
0.6978121.5889351.691087e-08
0.71.5888351.673600e-08
0.7011871.5887811.668862e-08
0.7045791.5886271.655326e-08
0.7079871.5884751.641724e-08
0.7114111.5883241.628057e-08
0.7148521.5881751.614324e-08
0.718311.5880271.600524e-08
0.7217851.587881.586658e-08
0.7252761.5877341.572724e-08
0.7287841.587591.558723e-08
0.7323091.5874461.544655e-08
0.7358511.5873041.530518e-08
0.739411.5871631.516313e-08
0.7429871.5870241.502039e-08
0.7465811.5868851.487696e-08
0.7501921.5867481.473284e-08
0.7538211.5866111.458802e-08
0.7574671.5864761.444250e-08
0.7611311.5863421.429628e-08
0.7648121.5862091.414935e-08
0.7685111.5860771.400171e-08
0.7722291.5859461.385335e-08
0.7759641.5858161.370428e-08
0.7797171.5856871.355448e-08
0.7834891.5855591.340397e-08
0.7872781.5854311.325272e-08
0.7910861.5853051.310074e-08
0.7949131.585181.294803e-08
0.7987581.5850561.279457e-08
0.81.5850161.274500e-08
0.8026211.5849331.297497e-08
0.8065041.584811.331556e-08
0.8104051.5846891.365780e-08
0.8143251.5845681.400169e-08
0.8182631.5844481.434725e-08
0.8222211.5843291.469447e-08
0.8261981.5842111.504338e-08
0.8301951.5840941.539397e-08
0.834211.5839771.574626e-08
0.8382451.5838611.610026e-08
0.84231.5837461.645596e-08
0.8463741.5836321.681339e-08
0.8504681.5835191.717254e-08
0.8545811.5834061.753343e-08
0.8587151.5832941.789607e-08
0.8628691.5831831.826046e-08
0.8670421.5830721.862662e-08
0.8712361.5829621.899455e-08
0.875451.5828531.936425e-08
0.8796851.5827451.973574e-08
0.883941.5826372.010903e-08
0.8882151.582532.048413e-08
0.8925121.5824232.086104e-08
0.8968291.5823172.123977e-08
0.91.582242.151800e-08
0.9011671.5822122.163905e-08
0.9055251.5821072.209137e-08
0.9099051.5820032.254588e-08
0.9143071.5818992.300259e-08
0.9187291.5817962.346151e-08
0.9231731.5816942.392265e-08
0.9276381.5815922.438602e-08
0.9321251.581492.485163e-08
0.9366341.5813892.531949e-08
0.9411641.5812892.578962e-08
0.9457171.5811892.626201e-08
0.9502911.581092.673670e-08
0.9548881.5809912.721368e-08
0.9595061.5808922.769297e-08
0.9641471.5807942.817457e-08
0.9688111.5806972.865851e-08
0.9734971.58062.914478e-08
0.9782061.5805032.963341e-08
0.9829371.5804073.012440e-08
0.9876921.5803113.061777e-08
0.9924691.5802163.111352e-08
0.997271.580123.161167e-08
11.5800673.189500e-08
1.002091.5800263.196177e-08
1.006941.5799313.211637e-08
1.011811.5798383.227171e-08
1.016711.5797443.242781e-08
1.021621.5796513.258466e-08
1.026561.5795583.274227e-08
1.031531.5794653.290064e-08
1.036521.5793733.305978e-08
1.041531.5792813.321969e-08
1.046571.5791893.338037e-08
1.051631.5790983.354183e-08
1.056721.5790063.370407e-08
1.061831.5789153.386710e-08
1.066971.5788253.403091e-08
1.072131.5787343.419552e-08
1.077311.5786443.436092e-08
1.082521.5785543.452712e-08
1.087761.5784643.469413e-08
1.093021.5783753.486194e-08
1.098311.5782863.503056e-08
1.103621.5781963.520001e-08
1.108961.5781073.537027e-08
1.114321.5780193.554135e-08
1.119711.577933.571326e-08
1.125131.5778423.588601e-08
1.130571.5777533.605958e-08
1.136041.5776653.623400e-08
1.141541.5775773.640927e-08
1.147061.5774893.658537e-08
1.152611.5774013.676234e-08
1.158181.5773133.694015e-08
1.163781.5772263.711883e-08
1.169411.5771383.729837e-08
1.175071.577053.747878e-08
1.180751.5769633.766007e-08
1.186461.5768763.784223e-08
1.19221.5767883.802527e-08
1.197971.5767013.820919e-08
1.21.576673.827400e-08
1.203761.5766143.881530e-08
1.209591.5765263.965293e-08
1.215441.5764394.049461e-08
1.221311.5763524.134036e-08
1.227221.5762644.219021e-08
1.233161.5761774.304416e-08
1.239121.576094.390225e-08
1.245121.5760024.476449e-08
1.251141.5759154.563089e-08
1.257191.5758284.650149e-08
1.263271.575744.737630e-08
1.269381.5756524.825534e-08
1.275521.5755654.913863e-08
1.281691.5754775.002619e-08
1.287891.5753895.091805e-08
1.294121.5753015.181422e-08
1.300381.5752135.271473e-08
1.306671.5751255.361959e-08
1.312991.5750375.452883e-08
1.319341.5749485.544246e-08
1.325721.574865.636052e-08
1.332141.5747715.728302e-08
1.338581.5746825.820997e-08
1.345051.5745935.914142e-08
1.351561.5745036.007736e-08
1.35811.5744146.101784e-08
1.364671.5743246.196286e-08
1.371271.5742346.291246e-08
1.37791.5741446.386664e-08
1.384561.5740546.482545e-08
1.391261.5739636.578889e-08
1.397991.5738726.675699e-08
1.41.5738456.704600e-08
1.404751.5737816.757820e-08
1.411551.573696.833900e-08
1.418381.5735986.910349e-08
1.425241.5735066.987167e-08
1.432131.5734147.064357e-08
1.439061.5733217.141920e-08
1.446021.5732297.219858e-08
1.453011.5731357.298174e-08
1.460041.5730427.376868e-08
1.46711.5729487.455943e-08
1.47421.5728547.535400e-08
1.481331.5727597.615242e-08
1.488491.5726647.695469e-08
1.495691.5725697.776085e-08
1.502931.5724737.857091e-08
1.51021.5723777.938489e-08
1.51751.5722818.020280e-08
1.524841.5721848.102467e-08
1.532221.5720868.185051e-08
1.539631.5719898.268035e-08
1.547081.571898.351421e-08
1.554561.5717928.435209e-08
1.562081.5716928.519403e-08
1.569641.5715938.604004e-08
1.577231.5714938.689015e-08
1.584861.5713928.774436e-08
1.592521.5712918.860271e-08
1.61.5711928.944000e-08
1.600231.5711898.961581e-08
1.607971.5710879.565936e-08
1.615741.5709841.017322e-07
1.623561.5708811.078343e-07
1.631411.5707771.139660e-07
1.63931.5706721.201273e-07
1.647231.5705671.263185e-07
1.65521.5704621.325396e-07
1.663211.5703561.387907e-07
1.671251.5702491.450721e-07
1.679331.5701411.513839e-07
1.687461.5700331.577263e-07
1.695621.5699241.640993e-07
1.703821.5698151.705031e-07
1.712061.5697051.769379e-07
1.720341.5695941.834038e-07
1.728661.5694821.899010e-07
1.737031.569371.964297e-07
1.745431.5692572.029899e-07
1.753871.5691442.095818e-07
1.762351.5690292.162056e-07
1.770881.5689142.228615e-07
1.779441.5687982.295496e-07
1.788051.5686812.362700e-07
1.79671.5685642.430229e-07
1.81.5685192.456000e-07
1.805391.5684462.529309e-07
1.814121.5683272.648081e-07
1.82291.5682072.767427e-07
1.831711.5680862.887350e-07
1.840571.5679643.007854e-07
1.849481.5678423.128941e-07
1.858421.5677183.250613e-07
1.867411.5675943.372874e-07
1.876441.5674693.495726e-07
1.885521.5673423.619172e-07
1.894641.5672153.743216e-07
1.903811.5670873.867859e-07
1.913011.5669583.993106e-07
1.922271.5668284.118958e-07
1.931571.5666974.245419e-07
1.940911.5665654.372491e-07
1.95031.5664324.500178e-07
1.959731.5662984.628483e-07
1.969211.5661634.757409e-07
1.978731.5660274.886958e-07
1.98831.565895.017133e-07
1.997921.5657525.147939e-07
21.5657225.176200e-07
2.007591.5656125.426150e-07
2.01731.5654725.746105e-07
2.027051.565336.067607e-07
2.036861.5651876.390664e-07
2.046711.5650436.715283e-07
2.056611.5648987.041473e-07
2.066561.5647527.369241e-07
2.076551.5646047.698594e-07
2.08661.5644558.029540e-07
2.096691.5643058.362087e-07
2.106831.5641548.696242e-07
2.117021.5640019.032014e-07
2.127261.5638479.369410e-07
2.137551.5636929.708437e-07
2.147891.5635351.004911e-06
2.158281.5633771.039142e-06
2.168721.5632181.073539e-06
2.179211.5630571.108103e-06
2.189751.5628951.142833e-06
2.21.5627361.176600e-06
2.200341.5627311.177493e-06
2.210991.5625661.205165e-06
2.221681.56241.232970e-06
2.232431.5622321.260910e-06
2.243231.5620621.288986e-06
2.254081.5618911.317197e-06
2.264981.5617191.345544e-06
2.275931.5615441.374029e-06
2.286941.5613691.402651e-06
2.2981.5611911.431412e-06
2.309121.5610121.460311e-06
2.320291.5608321.489351e-06
2.331511.560651.518531e-06
2.342791.5604661.547853e-06
2.354121.560281.577316e-06
2.365511.5600931.606921e-06
2.376951.5599031.636670e-06
2.388451.5597131.666563e-06
2.41.559521.696600e-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
—