Optical constants

Refractive index of S-TIH4 (OHARA)

S-TIH4: 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
1.75519
Extinction coefficient k
2.70488e-08
Permittivity ε1
3.0807
Permittivity ε2
9.49519e-08
Absorption coefficient α
0.00578465 cm⁻¹
Penetration depth δ = λ/(2πk)
3.45743e+09 nm
Abbe number Vd
27.512
Chromatic dispersion dn/dλ
-0.137605 µm⁻¹
Group index ng
1.83605
Group velocity dispersion
281.499 fs²/mm
Dispersion parameter D
-1535.72 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-TIH4 (OHARA): S-TIH4
ohara_s_tih4 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-TIH4", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_tih4.range_nm)  # (370, 2400) nm
eps = ohara_s_tih4.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=1.66755531λ2λ2−0.0122052137+0.294411865λ2λ2−0.0597775329+2.49422119λ2λ2−214.869618

Valid from 0.37 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.66755531
C30.0122052137
C40.294411865
C50.0597775329
C62.49422119
C7214.869618

Comments and conditions

Recommended - Lightweight

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -2.51e-06 1.06e-08 -3.89e-11 8.33e-07 1.27e-09 0.305
nd
1.755199
Vd
27.512089
glass code
755275
density
value: 3150
thermal expansion
value: 8.5e-06, temperature range: 243 343; value: 1e-05, temperature range: 293 573
dPgF
0.0133
resistance
acid: 1.0; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 1.16e-07 K⁻¹ at 633 nm, dn/dT = -1.14e-06 K⁻¹ at 1310 nm, dn/dT = -1.22e-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 421 wavelengths, the same grid as the API and the library
S-TIH4 (OHARA), S-TIH4: n and k versus wavelength
λ (µm)nk
0.371.8307916.242800e-06
0.3717381.8293065.577499e-06
0.3734841.8278484.909073e-06
0.3752381.8264184.237507e-06
0.3770011.8250143.562787e-06
0.3787711.8236352.884898e-06
0.381.8226972.414600e-06
0.3805511.8222812.342600e-06
0.3823381.8209522.108855e-06
0.3841341.8196461.874012e-06
0.3859381.8183631.638066e-06
0.3877511.8171021.401012e-06
0.3895721.8158631.162844e-06
0.391.8155761.106900e-06
0.3914021.8146451.040275e-06
0.393241.8134489.529110e-07
0.3950871.8122718.651371e-07
0.3969431.8111137.769508e-07
0.3988081.8099756.883504e-07
0.41.809266.316900e-07
0.4006811.8088556.185646e-07
0.4025631.8077545.822853e-07
0.4044541.8066715.458355e-07
0.4063531.8056045.092145e-07
0.4082621.8045554.724215e-07
0.410181.8035234.354556e-07
0.4121061.8025063.983162e-07
0.4140421.8015063.610023e-07
0.4159871.8005213.235131e-07
0.4179411.7995512.858479e-07
0.4199041.7985962.480057e-07
0.421.798552.461500e-07
0.4218761.7976562.357849e-07
0.4238581.7967292.248368e-07
0.4258481.7958172.138373e-07
0.4278491.7949182.027861e-07
0.4298581.7940321.916830e-07
0.4318771.793161.805278e-07
0.4339061.79231.693201e-07
0.4359441.7914521.580598e-07
0.4379921.7906171.467466e-07
0.441.7898131.356500e-07
0.4400491.7897941.355635e-07
0.4421161.7889821.318988e-07
0.4441921.7881831.282170e-07
0.4462791.7873941.245178e-07
0.4483751.7866161.208013e-07
0.4504811.785851.170673e-07
0.4525971.7850931.133158e-07
0.4547231.7843481.095467e-07
0.4568591.7836121.057598e-07
0.4590041.7828871.019552e-07
0.461.7825551.001900e-07
0.461161.7821719.885437e-08
0.4633261.7814659.636111e-08
0.4655031.7807699.385613e-08
0.4676891.7800829.133939e-08
0.4698861.7794048.881083e-08
0.4720931.7787358.627040e-08
0.474311.7780758.371803e-08
0.4765381.7774238.115367e-08
0.4787771.776787.857727e-08
0.481.7764337.716900e-08
0.4810251.7761457.608873e-08
0.4832851.7755197.370836e-08
0.4855551.77497.131681e-08
0.4878351.774296.891402e-08
0.4901271.7736876.649995e-08
0.4924291.7730926.407454e-08
0.4947421.7725056.163773e-08
0.4970661.7719245.918948e-08
0.49941.7713525.672973e-08
0.51.7712065.609800e-08
0.5017461.7707865.490512e-08
0.5041031.7702275.329507e-08
0.5064711.7696755.167745e-08
0.5088491.769135.005223e-08
0.511241.7685924.841938e-08
0.5136411.768064.677886e-08
0.5160531.7675354.513064e-08
0.5184771.7670164.347467e-08
0.5209131.7665044.181092e-08
0.5233591.7659974.013936e-08
0.5258181.7654973.845995e-08
0.5282871.7650023.677265e-08
0.5307691.7645143.507743e-08
0.5332621.7640313.337424e-08
0.5357661.7635543.166306e-08
0.5382831.7630822.994383e-08
0.5408111.7626162.821653e-08
0.5433521.7621562.648112e-08
0.5459041.7617012.473756e-08
0.5484681.7612512.298580e-08
0.551.7609852.193900e-08
0.5510441.7608062.208087e-08
0.5536321.7603662.243261e-08
0.5562331.7599322.278601e-08
0.5588451.7595022.314107e-08
0.561471.7590772.349779e-08
0.5641071.7586572.385619e-08
0.5667571.7582422.421627e-08
0.5694191.7578322.457805e-08
0.5720941.7574262.494152e-08
0.5747811.7570242.530670e-08
0.577481.7566272.567360e-08
0.5801931.7562352.604222e-08
0.5829181.7558462.641257e-08
0.5856561.7554622.678466e-08
0.5884071.7550832.715850e-08
0.5911711.7547072.753409e-08
0.5939471.7543362.791145e-08
0.5967371.7539682.829058e-08
0.599541.7536052.867150e-08
0.61.7535452.873400e-08
0.6023561.7532452.909218e-08
0.6051851.7528892.952228e-08
0.6080281.7525372.995441e-08
0.6108841.7521893.038857e-08
0.6137531.7518453.082476e-08
0.6166361.7515043.126301e-08
0.6195321.7511663.170331e-08
0.6224421.7508333.214568e-08
0.6253661.7505023.259013e-08
0.6283031.7501763.303667e-08
0.6312541.7498523.348530e-08
0.6342191.7495323.393604e-08
0.6371981.7492163.438890e-08
0.6401911.7489023.484388e-08
0.6431981.7485923.530101e-08
0.6462191.7482853.576028e-08
0.6492551.7479813.622170e-08
0.651.7479073.633500e-08
0.6523041.747683.594728e-08
0.6553681.7473823.543175e-08
0.6584461.7470873.491380e-08
0.6615391.7467953.439342e-08
0.6646461.7465063.387059e-08
0.6677681.746223.334531e-08
0.6709051.7459373.281756e-08
0.6740561.7456573.228733e-08
0.6772221.7453793.175461e-08
0.6804031.7451043.121939e-08
0.6835991.7448323.068165e-08
0.686811.7445623.014139e-08
0.6900361.7442952.959859e-08
0.6932771.7440312.905324e-08
0.6965331.7437692.850533e-08
0.6998051.7435092.795485e-08
0.71.7434942.792200e-08
0.7030921.7432522.725564e-08
0.7063941.7429982.654388e-08
0.7097121.7427462.582878e-08
0.7130461.7424962.511032e-08
0.7163951.7422492.438848e-08
0.719761.7420042.366326e-08
0.723141.7417612.293462e-08
0.7265371.7415212.220257e-08
0.729951.7412822.146707e-08
0.7333781.7410462.072812e-08
0.7368231.7408121.998570e-08
0.7402841.740581.923980e-08
0.7437611.7403511.849039e-08
0.7472541.7401231.773746e-08
0.7507641.7398981.698099e-08
0.7542911.7396741.622097e-08
0.7578331.7394531.545738e-08
0.7613931.7392331.469020e-08
0.7649691.7390151.391942e-08
0.7685621.73881.314502e-08
0.7721721.7385861.236698e-08
0.7757991.7383741.158529e-08
0.7794431.7381641.079993e-08
0.7831041.7379551.001088e-08
0.7867821.7377499.218117e-09
0.7904781.7375448.421634e-09
0.7941911.7373417.621411e-09
0.7979211.7371396.817428e-09
0.81.7370286.369400e-09
0.8016691.736946.382689e-09
0.8054351.7367426.412670e-09
0.8092181.7365456.442791e-09
0.8130191.7363516.473054e-09
0.8168371.7361576.503459e-09
0.8206741.7359666.534007e-09
0.8245291.7357766.564698e-09
0.8284021.7355876.595533e-09
0.8322931.73546.626514e-09
0.8362021.7352156.657639e-09
0.840131.7350316.688911e-09
0.8440761.7348486.720330e-09
0.848041.7346676.751897e-09
0.8520241.7344876.783611e-09
0.8560251.7343096.815475e-09
0.8600461.7341326.847488e-09
0.8640861.7339566.879652e-09
0.8681451.7337826.911967e-09
0.8722221.7336096.944433e-09
0.8763191.7334376.977052e-09
0.8804351.7332677.009825e-09
0.8845711.7330977.042751e-09
0.8887251.7329297.075832e-09
0.89291.7327637.109068e-09
0.8970941.7325977.142460e-09
0.91.7324847.165600e-09
0.9013071.7324337.176008e-09
0.9055411.7322697.209711e-09
0.9097941.7321077.243571e-09
0.9140671.7319467.277591e-09
0.9183611.7317867.311771e-09
0.9226741.7316287.346111e-09
0.9270081.731477.380613e-09
0.9313621.7313137.415276e-09
0.9357371.7311587.450102e-09
0.9401321.7310037.485092e-09
0.9445481.7308497.520247e-09
0.9489851.7306977.555566e-09
0.9534421.7305457.591051e-09
0.957921.7303947.626703e-09
0.962421.7302457.662523e-09
0.966941.7300967.698511e-09
0.9714821.7299487.734667e-09
0.9760451.7298017.770994e-09
0.9806291.7296557.807491e-09
0.9852351.7295097.844160e-09
0.9898631.7293657.881000e-09
0.9945131.7292217.918014e-09
0.9991841.7290797.955202e-09
11.7290547.961700e-09
1.003881.7289378.363534e-09
1.008591.7287968.852250e-09
1.013331.7286559.343262e-09
1.018091.7285159.836581e-09
1.022871.7283771.033222e-08
1.027681.7282381.083018e-08
1.03251.7281011.133048e-08
1.037351.7279641.183313e-08
1.042221.7278281.233815e-08
1.047121.7276931.284553e-08
1.052041.7275581.335530e-08
1.056981.7274241.386746e-08
1.061941.727291.438203e-08
1.066931.7271581.489902e-08
1.071941.7270251.541843e-08
1.076981.7268941.594029e-08
1.082041.7267631.646459e-08
1.087121.7266321.699136e-08
1.092231.7265021.752060e-08
1.097361.7263731.805233e-08
1.102511.7262441.858655e-08
1.107691.7261161.912329e-08
1.112891.7259881.966254e-08
1.118121.725862.020433e-08
1.123371.7257342.074866e-08
1.128651.7256072.129555e-08
1.133951.7254812.184501e-08
1.139271.7253562.239705e-08
1.144631.7252312.295168e-08
1.151.7251062.350892e-08
1.15541.7249822.406877e-08
1.160831.7248582.463126e-08
1.166281.7247342.519638e-08
1.171761.7246112.576416e-08
1.177271.7244892.633461e-08
1.182791.7243662.690774e-08
1.188351.7242442.748356e-08
1.193931.7241222.806208e-08
1.199541.7240012.864332e-08
1.21.7239912.869100e-08
1.205171.723882.939348e-08
1.210831.7237593.016201e-08
1.216521.7236383.093415e-08
1.222241.7235183.170991e-08
1.227981.7233983.248932e-08
1.233741.7232783.327239e-08
1.239541.7231583.405913e-08
1.245361.7230393.484958e-08
1.251211.722923.564373e-08
1.257091.7228013.644162e-08
1.262991.7226823.724325e-08
1.268931.7225633.804865e-08
1.274891.7224443.885783e-08
1.280871.7223263.967081e-08
1.286891.7222084.048761e-08
1.292931.722094.130825e-08
1.299011.7219724.213274e-08
1.305111.7218544.296110e-08
1.311241.7217364.379336e-08
1.31741.7216184.462952e-08
1.323591.7215014.546961e-08
1.32981.7213834.631365e-08
1.336051.7212654.716165e-08
1.342321.7211484.801364e-08
1.348631.721034.886963e-08
1.354961.7209134.972963e-08
1.361331.7207955.059368e-08
1.367721.7206785.146179e-08
1.374151.720565.233397e-08
1.38061.7204435.321025e-08
1.387091.7203255.409064e-08
1.39361.7202075.497517e-08
1.41.7200925.584400e-08
1.400151.7200895.585920e-08
1.406721.7199725.654250e-08
1.413331.7198545.722901e-08
1.419971.7197365.791874e-08
1.426641.7196175.861171e-08
1.433341.7194995.930794e-08
1.440071.7193816.000744e-08
1.446841.7192626.071022e-08
1.453631.7191446.141631e-08
1.460461.7190256.212571e-08
1.467321.7189066.283844e-08
1.474211.7187866.355452e-08
1.481141.7186676.427396e-08
1.488091.7185476.499679e-08
1.495081.7184276.572301e-08
1.50211.7183076.645263e-08
1.509161.7181876.718569e-08
1.516251.7180666.792219e-08
1.523371.7179456.866215e-08
1.530531.7178246.940559e-08
1.537711.7177027.015251e-08
1.544941.7175817.090295e-08
1.552191.7174597.165691e-08
1.559481.7173367.241441e-08
1.566811.7172137.317547e-08
1.574171.717097.394010e-08
1.581561.7169677.470833e-08
1.588991.7168437.548016e-08
1.596451.7167187.625562e-08
1.61.7166597.662400e-08
1.603951.7165947.881410e-08
1.611491.7164698.298804e-08
1.619061.7163438.718159e-08
1.626661.7162179.139484e-08
1.63431.7160919.562788e-08
1.641981.7159649.988080e-08
1.649691.7158371.041537e-07
1.657441.7157091.084467e-07
1.665221.715581.127598e-07
1.673051.7154521.170932e-07
1.68091.7153221.214469e-07
1.68881.7151921.258211e-07
1.696731.7150621.302159e-07
1.70471.7149311.346312e-07
1.712711.7147991.390674e-07
1.720751.7146671.435243e-07
1.728831.7145351.480022e-07
1.736951.7144011.525011e-07
1.745111.7142671.570212e-07
1.753311.7141331.615625e-07
1.761551.7139971.661251e-07
1.769821.7138611.707091e-07
1.778131.7137251.753147e-07
1.786481.7135881.799419e-07
1.794881.713451.845909e-07
1.81.7133651.874300e-07
1.803311.7133111.893784e-07
1.811781.7131711.943703e-07
1.820291.7130311.993856e-07
1.828841.712892.044245e-07
1.837431.7127492.094871e-07
1.846061.7126062.145734e-07
1.854731.7124632.196836e-07
1.863441.7123192.248179e-07
1.872191.7121742.299762e-07
1.880991.7120282.351588e-07
1.889821.7118822.403657e-07
1.89871.7117342.455971e-07
1.907621.7115862.508530e-07
1.916581.7114372.561337e-07
1.925581.7112872.614391e-07
1.934621.7111362.667694e-07
1.943711.7109842.721248e-07
1.952841.7108312.775054e-07
1.962011.7106772.829112e-07
1.971231.7105222.883424e-07
1.980491.7103662.937991e-07
1.989791.7102092.992815e-07
1.999131.7100513.047896e-07
21.7100363.053000e-07
2.008521.7098923.219706e-07
2.017961.7097323.404213e-07
2.027441.7095713.589586e-07
2.036961.7094093.775830e-07
2.046531.7092453.962949e-07
2.056141.7090814.150947e-07
2.06581.7089154.339828e-07
2.07551.7087484.529595e-07
2.085251.7085814.720255e-07
2.095041.7084114.911810e-07
2.104881.7082415.104264e-07
2.114771.7080695.297623e-07
2.12471.7078975.491889e-07
2.134681.7077235.687069e-07
2.144711.7075475.883165e-07
2.154781.7073716.080182e-07
2.16491.7071936.278124e-07
2.175071.7070136.476996e-07
2.185291.7068336.676802e-07
2.195551.7066516.877547e-07
2.21.7065726.964500e-07
2.205871.7064677.094928e-07
2.216231.7062827.325279e-07
2.226641.7060967.556711e-07
2.23711.7059097.789231e-07
2.24761.7057198.022843e-07
2.258161.7055298.257552e-07
2.268771.7053378.493363e-07
2.279421.7051438.730282e-07
2.290131.7049488.968314e-07
2.300891.7047519.207464e-07
2.311691.7045539.447737e-07
2.322551.7043539.689139e-07
2.333461.7041519.931675e-07
2.344421.7039481.017535e-06
2.355431.7037431.042017e-06
2.36651.7035371.066614e-06
2.377611.7033281.091326e-06
2.388781.7031181.116155e-06
2.41.7029071.141100e-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
—