Optical constants

Refractive index of S-TIM35 (OHARA)

S-TIM35: n,k 0.37–2.4 µm

Data
formula 2 + tabulated k
Range
0.37–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.37–2.4 µm
Refractive index n
1.69894
Extinction coefficient k
2.81403e-08
Permittivity ε1
2.88641
Permittivity ε2
9.56175e-08
Absorption coefficient α
0.00601806 cm⁻¹
Penetration depth δ = λ/(2πk)
3.32333e+09 nm
Abbe number Vd
30.128
Chromatic dispersion dn/dλ
-0.116687 µm⁻¹
Group index ng
1.76751
Group velocity dispersion
234.707 fs²/mm
Dispersion parameter D
-1280.45 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-TIM35 (OHARA): S-TIM35
ohara_s_tim35 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-TIM35", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_tim35.range_nm)  # (370, 2400) nm
eps = ohara_s_tim35.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=1.55849775λ2λ2−0.0115367235+0.230767007λ2λ2−0.0586095947+1.84436099λ2λ2−162.981888

Valid from 0.37 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.55849775
C30.0115367235
C40.230767007
C50.0586095947
C61.84436099
C7162.981888

Comments and conditions

Recommended - Lightweight

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 4.7e-07 1.25e-08 -3.4e-11 8.29e-07 1.09e-09 0.289
nd
1.698947
Vd
30.127865
glass code
699301
density
value: 2960
thermal expansion
value: 7.5e-06, temperature range: 243 343; value: 8.9e-06, temperature range: 293 573
dPgF
0.0103
resistance
acid: 1.0; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 1.70e-06 K⁻¹ at 633 nm, dn/dT = 5.24e-07 K⁻¹ at 1310 nm, dn/dT = 4.41e-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 421 wavelengths, the same grid as the API and the library
S-TIM35 (OHARA), S-TIM35: n and k versus wavelength
λ (µm)nk
0.371.7617875.789000e-06
0.3717381.7605745.168658e-06
0.3734841.7593834.545403e-06
0.3752381.7582133.919220e-06
0.3770011.7570643.290096e-06
0.3787711.7559352.658017e-06
0.381.7551672.219500e-06
0.3805511.7548262.153430e-06
0.3823381.7537361.938936e-06
0.3841341.7526641.723434e-06
0.3859381.7516111.506920e-06
0.3877511.7505761.289389e-06
0.3895721.7495571.070837e-06
0.391.7493211.019500e-06
0.3914021.7485569.543734e-07
0.393241.7475718.689750e-07
0.3950871.7466027.831756e-07
0.3969431.7456486.969731e-07
0.3988081.744716.103658e-07
0.41.744125.549800e-07
0.4006811.7437875.432477e-07
0.4025631.7428795.108189e-07
0.4044541.7419844.782378e-07
0.4063531.7411044.455036e-07
0.4082621.7402374.126157e-07
0.410181.7393833.795733e-07
0.4121061.7385433.463757e-07
0.4140421.7377153.130222e-07
0.4159871.73692.795121e-07
0.4179411.7360962.458445e-07
0.4199041.7353052.120188e-07
0.421.7352672.103600e-07
0.4218761.7345252.026702e-07
0.4238581.7337571.945478e-07
0.4258481.7331.863872e-07
0.4278491.7322541.781883e-07
0.4298581.7315181.699509e-07
0.4318771.7307941.616748e-07
0.4339061.7300791.533599e-07
0.4359441.7293741.450059e-07
0.4379921.728681.366126e-07
0.441.7280111.283800e-07
0.4400491.7279951.283020e-07
0.4421161.7273191.250005e-07
0.4441921.7266531.216836e-07
0.4462791.7259961.183510e-07
0.4483751.7253481.150028e-07
0.4504811.7247091.116388e-07
0.4525971.7240781.082591e-07
0.4547231.7234561.048634e-07
0.4568591.7228421.014519e-07
0.4590041.7222379.802426e-08
0.461.7219599.643400e-08
0.461161.7216399.509025e-08
0.4633261.7210499.258182e-08
0.4655031.7204679.006161e-08
0.4676891.7198938.752957e-08
0.4698861.7193268.498563e-08
0.4720931.7187668.242975e-08
0.474311.7182137.986185e-08
0.4765381.7176687.728190e-08
0.4787771.7171297.468983e-08
0.481.7168397.327300e-08
0.4810251.7165987.239247e-08
0.4832851.7160737.045223e-08
0.4855551.7155546.850287e-08
0.4878351.7150426.654436e-08
0.4901271.7145376.457664e-08
0.4924291.7140386.259969e-08
0.4947421.7135446.061344e-08
0.4970661.7130575.861787e-08
0.49941.7125765.661293e-08
0.51.7124545.609800e-08
0.5017461.7121015.505881e-08
0.5041031.7116315.365619e-08
0.5064711.7111685.224699e-08
0.5088491.7107095.083116e-08
0.511241.7102574.940868e-08
0.5136411.7098094.797953e-08
0.5160531.7093674.654366e-08
0.5184771.708934.510104e-08
0.5209131.7084994.365165e-08
0.5233591.7080724.219545e-08
0.5258181.7076514.073242e-08
0.5282871.7072343.926251e-08
0.5307691.7068223.778569e-08
0.5332621.7064153.630194e-08
0.5357661.7060133.481122e-08
0.5382831.7056153.331350e-08
0.5408111.7052223.180874e-08
0.5433521.7048333.029692e-08
0.5459041.7044492.877799e-08
0.5484681.7040692.725193e-08
0.551.7038442.634000e-08
0.5510441.7036932.638998e-08
0.5536321.7033212.651391e-08
0.5562331.7029542.663842e-08
0.5588451.7025912.676351e-08
0.561471.7022322.688919e-08
0.5641071.7018762.701546e-08
0.5667571.7015252.714232e-08
0.5694191.7011772.726978e-08
0.5720941.7008342.739784e-08
0.5747811.7004942.752650e-08
0.577481.7001582.765577e-08
0.5801931.6998252.778564e-08
0.5829181.6994962.791612e-08
0.5856561.699172.804721e-08
0.5884071.6988482.817892e-08
0.5911711.698532.831125e-08
0.5939471.6982152.844420e-08
0.5967371.6979032.857778e-08
0.599541.6975942.871198e-08
0.61.6975442.873400e-08
0.6023561.6972892.909218e-08
0.6051851.6969872.952228e-08
0.6080281.6966882.995441e-08
0.6108841.6963923.038857e-08
0.6137531.6960993.082476e-08
0.6166361.6958093.126301e-08
0.6195321.6955223.170331e-08
0.6224421.6952393.214568e-08
0.6253661.6949583.259013e-08
0.6283031.6946793.303667e-08
0.6312541.6944043.348530e-08
0.6342191.6941323.393604e-08
0.6371981.6938623.438890e-08
0.6401911.6935953.484388e-08
0.6431981.693333.530101e-08
0.6462191.6930693.576028e-08
0.6492551.6928093.622170e-08
0.651.6927463.633500e-08
0.6523041.6925533.594728e-08
0.6553681.6922993.543175e-08
0.6584461.6920473.491380e-08
0.6615391.6917983.439342e-08
0.6646461.6915513.387059e-08
0.6677681.6913073.334531e-08
0.6709051.6910653.281756e-08
0.6740561.6908253.228733e-08
0.6772221.6905883.175461e-08
0.6804031.6903523.121939e-08
0.6835991.690123.068165e-08
0.686811.6898893.014139e-08
0.6900361.689662.959859e-08
0.6932771.6894342.905324e-08
0.6965331.689212.850533e-08
0.6998051.6889872.795485e-08
0.71.6889742.792200e-08
0.7030921.6887672.745276e-08
0.7063941.6885492.695155e-08
0.7097121.6883332.644799e-08
0.7130461.6881192.594206e-08
0.7163951.6879072.543375e-08
0.719761.6876962.492306e-08
0.723141.6874882.440997e-08
0.7265371.6872812.389447e-08
0.729951.6870772.337654e-08
0.7333781.6868742.285619e-08
0.7368231.6866732.233339e-08
0.7402841.6864732.180813e-08
0.7437611.6862762.128041e-08
0.7472541.686082.075021e-08
0.7507641.6858862.021751e-08
0.7542911.6856931.968232e-08
0.7578331.6855021.914461e-08
0.7613931.6853131.860438e-08
0.7649691.6851251.806161e-08
0.7685621.6849391.751629e-08
0.7721721.6847551.696840e-08
0.7757991.6845721.641795e-08
0.7794431.6843911.586491e-08
0.7831041.6842111.530927e-08
0.7867821.6840321.475102e-08
0.7904781.6838551.419015e-08
0.7941911.683681.362665e-08
0.7979211.6835051.306049e-08
0.81.6834091.274500e-08
0.8016691.6833331.265188e-08
0.8054351.6831611.244179e-08
0.8092181.6829911.223071e-08
0.8130191.6828221.201864e-08
0.8168371.6826551.180558e-08
0.8206741.6824891.159151e-08
0.8245291.6823241.137644e-08
0.8284021.682161.116036e-08
0.8322931.6819981.094327e-08
0.8362021.6818371.072515e-08
0.840131.6816771.050601e-08
0.8440761.6815181.028584e-08
0.848041.6813611.006464e-08
0.8520241.6812049.842400e-09
0.8560251.6810499.619114e-09
0.8600461.6808959.394779e-09
0.8640861.6807429.169391e-09
0.8681451.680598.942944e-09
0.8722221.6804398.715434e-09
0.8763191.6802898.486855e-09
0.8804351.680148.257202e-09
0.8845711.6799928.026471e-09
0.8887251.6798467.794656e-09
0.89291.67977.561752e-09
0.8970941.6795557.327754e-09
0.91.6794567.165600e-09
0.9013071.6794117.176008e-09
0.9055411.6792687.209711e-09
0.9097941.6791267.243571e-09
0.9140671.6789857.277591e-09
0.9183611.6788457.311771e-09
0.9226741.6787057.346111e-09
0.9270081.6785677.380613e-09
0.9313621.6784297.415276e-09
0.9357371.6782937.450102e-09
0.9401321.6781577.485092e-09
0.9445481.6780217.520247e-09
0.9489851.6778877.555566e-09
0.9534421.6777537.591051e-09
0.957921.6776217.626703e-09
0.962421.6774897.662523e-09
0.966941.6773577.698511e-09
0.9714821.6772277.734667e-09
0.9760451.6770977.770994e-09
0.9806291.6769677.807491e-09
0.9852351.6768397.844160e-09
0.9898631.6767117.881000e-09
0.9945131.6765847.918014e-09
0.9991841.6764577.955202e-09
11.6764357.961700e-09
1.003881.6763317.992568e-09
1.008591.6762068.030111e-09
1.013331.6760818.067830e-09
1.018091.6759578.105726e-09
1.022871.6758348.143800e-09
1.027681.6757118.182053e-09
1.03251.6755888.220486e-09
1.037351.6754678.259099e-09
1.042221.6753458.297893e-09
1.047121.6752258.336870e-09
1.052041.6751048.376030e-09
1.056981.6749848.415374e-09
1.061941.6748658.454902e-09
1.066931.6747468.494616e-09
1.071941.6746288.534517e-09
1.076981.674518.574605e-09
1.082041.6743928.614882e-09
1.087121.6742758.655347e-09
1.092231.6741598.696003e-09
1.097361.6740428.736850e-09
1.102511.6739278.777888e-09
1.107691.6738118.819120e-09
1.112891.6736968.860545e-09
1.118121.6735818.902164e-09
1.123371.6734678.943979e-09
1.128651.6733538.985990e-09
1.133951.6732399.028199e-09
1.139271.6731259.070606e-09
1.144631.6730129.113212e-09
1.151.6728999.156019e-09
1.15541.6727879.199026e-09
1.160831.6726759.242235e-09
1.166281.6725629.285648e-09
1.171761.6724519.329264e-09
1.177271.6723399.373085e-09
1.182791.6722289.417112e-09
1.188351.6721169.461346e-09
1.193931.6720069.505787e-09
1.199541.6718959.550437e-09
1.21.6718869.554100e-09
1.205171.6717841.075168e-08
1.210831.6716741.206185e-08
1.216521.6715631.337817e-08
1.222241.6714531.470068e-08
1.227981.6713431.602940e-08
1.233741.6712341.736436e-08
1.239541.6711241.870559e-08
1.245361.6710142.005312e-08
1.251211.6709052.140698e-08
1.257091.6707952.276720e-08
1.262991.6706862.413381e-08
1.268931.6705772.550683e-08
1.274891.6704672.688631e-08
1.280871.6703582.827227e-08
1.286891.6702492.966473e-08
1.292931.670143.106374e-08
1.299011.6700313.246931e-08
1.305111.6699213.388149e-08
1.311241.6698123.530030e-08
1.31741.6697033.672578e-08
1.323591.6695943.815795e-08
1.32981.6694843.959685e-08
1.336051.6693754.104251e-08
1.342321.6692664.249496e-08
1.348631.6691564.395422e-08
1.354961.6690474.542035e-08
1.361331.6689374.689336e-08
1.367721.6688274.837329e-08
1.374151.6687184.986017e-08
1.38061.6686085.135403e-08
1.387091.6684985.285491e-08
1.39361.6683875.436284e-08
1.41.6682795.584400e-08
1.400151.6682775.584984e-08
1.406721.6681665.611217e-08
1.413331.6680555.637574e-08
1.419971.6679455.664055e-08
1.426641.6678335.690660e-08
1.433341.6677225.717390e-08
1.440071.667615.744246e-08
1.446841.6674995.771227e-08
1.453631.6673875.798336e-08
1.460461.6672745.825572e-08
1.467321.6671625.852935e-08
1.474211.6670495.880428e-08
1.481141.6669365.908049e-08
1.488091.6668225.935800e-08
1.495081.6667085.963682e-08
1.50211.6665945.991694e-08
1.509161.666486.019838e-08
1.516251.6663656.048114e-08
1.523371.666256.076523e-08
1.530531.6661356.105066e-08
1.537711.6660196.133742e-08
1.544941.6659036.162553e-08
1.552191.6657866.191500e-08
1.559481.6656696.220582e-08
1.566811.6655526.249802e-08
1.574171.6654346.279158e-08
1.581561.6653166.308652e-08
1.588991.6651976.338285e-08
1.596451.6650786.368057e-08
1.61.6650216.382200e-08
1.603951.6649586.597854e-08
1.611491.6648387.008852e-08
1.619061.6647177.421781e-08
1.626661.6645967.836649e-08
1.63431.6644748.253466e-08
1.641981.6643528.672241e-08
1.649691.6642299.092983e-08
1.657441.6641069.515701e-08
1.665221.6639829.940404e-08
1.673051.6638571.036710e-07
1.68091.6637321.079581e-07
1.68881.6636071.122652e-07
1.696731.663481.165926e-07
1.70471.6633531.209403e-07
1.712711.6632261.253085e-07
1.720751.6630971.296971e-07
1.728831.6629691.341064e-07
1.736951.6628391.385364e-07
1.745111.6627091.429872e-07
1.753311.6625781.474589e-07
1.761551.6624461.519516e-07
1.769821.6623141.564654e-07
1.778131.662181.610004e-07
1.786481.6620461.655567e-07
1.794881.6619121.701344e-07
1.81.6618291.729300e-07
1.803311.6617761.753865e-07
1.811781.661641.816803e-07
1.820291.6615031.880036e-07
1.828841.6613651.943566e-07
1.837431.6612262.007395e-07
1.846061.6610862.071523e-07
1.854731.6609462.135952e-07
1.863441.6608042.200685e-07
1.872191.6606622.265721e-07
1.880991.6605192.331063e-07
1.889821.6603752.396711e-07
1.89871.660232.462668e-07
1.907621.6600842.528935e-07
1.916581.6599372.595513e-07
1.925581.6597892.662403e-07
1.934621.659642.729608e-07
1.943711.659492.797129e-07
1.952841.6593392.864967e-07
1.962011.6591872.933123e-07
1.971231.6590343.001599e-07
1.980491.658883.070398e-07
1.989791.6587243.139519e-07
1.999131.6585683.208965e-07
21.6585543.215400e-07
2.008521.6584113.524161e-07
2.017961.6582523.865891e-07
2.027441.6580924.209226e-07
2.036961.6579314.554174e-07
2.046531.6577694.900742e-07
2.056141.6576065.248938e-07
2.06581.6574415.598770e-07
2.07551.6572755.950244e-07
2.085251.6571086.303370e-07
2.095041.656946.658154e-07
2.104881.6567717.014604e-07
2.114771.65667.372729e-07
2.12471.6564277.732536e-07
2.134681.6562548.094033e-07
2.144711.6560798.457228e-07
2.154781.6559038.822129e-07
2.16491.6557259.188744e-07
2.175071.6555469.557080e-07
2.185291.6553659.927147e-07
2.195551.6551831.029895e-06
2.21.6551041.046000e-06
2.205871.6551.055372e-06
2.216231.6548151.071923e-06
2.226641.6546281.088553e-06
2.23711.654441.105260e-06
2.24761.6542511.122046e-06
2.258161.6540591.138911e-06
2.268771.6538671.155855e-06
2.279421.6536721.172879e-06
2.290131.6534761.189983e-06
2.300891.6532791.207167e-06
2.311691.6530791.224431e-06
2.322551.6528781.241777e-06
2.333461.6526761.259204e-06
2.344421.6524711.276713e-06
2.355431.6522651.294305e-06
2.36651.6520571.311979e-06
2.377611.6518471.329735e-06
2.388781.6516361.347576e-06
2.41.6514221.365500e-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
—