Optical constants

Refractive index of S-TIH6 (OHARA)

S-TIH6: 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
1.80517
Extinction coefficient k
2.56224e-08
Permittivity ε1
3.25866
Permittivity ε2
9.25057e-08
Absorption coefficient α
0.00547958 cm⁻¹
Penetration depth δ = λ/(2πk)
3.64991e+09 nm
Abbe number Vd
25.425
Chromatic dispersion dn/dλ
-0.158345 µm⁻¹
Group index ng
1.89822
Group velocity dispersion
327.933 fs²/mm
Dispersion parameter D
-1789.05 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-TIH6 (OHARA): S-TIH6
ohara_s_tih6 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-TIH6", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_tih6.range_nm)  # (370, 2400) nm
eps = ohara_s_tih6.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=1.77227611λ2λ2−0.0131182633+0.34569125λ2λ2−0.0614479619+2.40788501λ2λ2−200.753254

Valid from 0.37 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.77227611
C30.0131182633
C40.34569125
C50.0614479619
C62.40788501
C7200.753254

Comments and conditions

Recommended - Lightweight

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -4.43e-06 1.06e-08 -3.14e-11 9.45e-07 1.14e-09 0.303
nd
1.805181
Vd
25.425363
glass code
805254
density
value: 3370
thermal expansion
value: 8.9e-06, temperature range: 243 343; value: 1.07e-05, temperature range: 293 573
dPgF
0.0158
resistance
acid: 1.0; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = -8.52e-07 K⁻¹ at 633 nm, dn/dT = -2.31e-06 K⁻¹ at 1310 nm, dn/dT = -2.40e-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-TIH6 (OHARA), S-TIH6: n and k versus wavelength
λ (µm)nk
0.371.8935896.242800e-06
0.3717381.8918245.543593e-06
0.3734841.8900934.841101e-06
0.3752381.8883964.135310e-06
0.3770011.8867313.426204e-06
0.3787711.8850972.713767e-06
0.381.8839862.219500e-06
0.3805511.8834942.158242e-06
0.3823381.881921.959370e-06
0.3841341.8803751.759564e-06
0.3859381.8788581.558820e-06
0.3877511.8773691.357132e-06
0.3895721.8759051.154498e-06
0.391.8755661.106900e-06
0.3914021.8744681.040275e-06
0.393241.8730559.529110e-07
0.3950871.8716678.651371e-07
0.3969431.8703037.769508e-07
0.3988081.8689636.883504e-07
0.41.868126.316900e-07
0.4006811.8676446.197960e-07
0.4025631.8663485.869202e-07
0.4044541.8650745.538900e-07
0.4063531.863825.207047e-07
0.4082621.8625874.873635e-07
0.410181.8613744.538657e-07
0.4121061.8601814.202105e-07
0.4140421.8590063.863973e-07
0.4159871.8578513.524252e-07
0.4179411.8567133.182936e-07
0.4199041.8555942.840016e-07
0.421.855542.823200e-07
0.4218761.8544922.709607e-07
0.4238581.8534072.589623e-07
0.4258481.8523382.469076e-07
0.4278491.8512862.347963e-07
0.4298581.850252.226281e-07
0.4318771.8492292.104028e-07
0.4339061.8482241.981200e-07
0.4359441.8472331.857795e-07
0.4379921.8462571.733811e-07
0.441.8453181.612200e-07
0.4400491.8452961.610987e-07
0.4421161.8443481.559603e-07
0.4441921.8434141.507978e-07
0.4462791.8424941.456111e-07
0.4483751.8415871.404000e-07
0.4504811.8406931.351644e-07
0.4525971.8398111.299042e-07
0.4547231.8389421.246194e-07
0.4568591.8380851.193097e-07
0.4590041.8372411.139750e-07
0.461.8368541.115000e-07
0.461161.8364071.099609e-07
0.4633261.8355861.070878e-07
0.4655031.8347751.042012e-07
0.4676891.8339761.013011e-07
0.4698861.8331879.838734e-08
0.4720931.8324099.545990e-08
0.474311.8316429.251870e-08
0.4765381.8308858.956369e-08
0.4787771.8301378.659480e-08
0.481.8297358.497200e-08
0.4810251.82948.390588e-08
0.4832851.8286738.155669e-08
0.4855551.8279557.919646e-08
0.4878351.8272467.682515e-08
0.4901271.8265477.444270e-08
0.4924291.8258567.204905e-08
0.4947421.8251756.964417e-08
0.4970661.8245026.722799e-08
0.49941.8238386.480046e-08
0.51.823676.417700e-08
0.5017461.8231836.300951e-08
0.5041031.8225356.143372e-08
0.5064711.8218965.985053e-08
0.5088491.8212655.825990e-08
0.511241.8206415.666180e-08
0.5136411.8200265.505620e-08
0.5160531.8194185.344305e-08
0.5184771.8188185.182233e-08
0.5209131.8182245.019399e-08
0.5233591.8176394.855801e-08
0.5258181.817064.691434e-08
0.5282871.8164884.526295e-08
0.5307691.8159244.360381e-08
0.5332621.8153664.193687e-08
0.5357661.8148154.026210e-08
0.5382831.814273.857947e-08
0.5408111.8137323.688893e-08
0.5433521.81323.519045e-08
0.5459041.8126753.348399e-08
0.5484681.8121553.176952e-08
0.551.8118493.074500e-08
0.5510441.8116423.060278e-08
0.5536321.8111353.025015e-08
0.5562331.8106332.989587e-08
0.5588451.8101382.953993e-08
0.561471.8096482.918231e-08
0.5641071.8091642.882301e-08
0.5667571.8086862.846203e-08
0.5694191.8082122.809935e-08
0.5720941.8077452.773497e-08
0.5747811.8072822.736887e-08
0.577481.8068252.700106e-08
0.5801931.8063732.663151e-08
0.5829181.8059262.626024e-08
0.5856561.8054842.588722e-08
0.5884071.8050472.551244e-08
0.5911711.8046152.513591e-08
0.5939471.8041882.475760e-08
0.5967371.8037652.437753e-08
0.599541.8033472.399566e-08
0.61.8032792.393300e-08
0.6023561.8029342.427209e-08
0.6051851.8025252.467928e-08
0.6080281.802122.508838e-08
0.6108841.801722.549941e-08
0.6137531.8013242.591236e-08
0.6166361.8009332.632726e-08
0.6195321.8005462.674410e-08
0.6224421.8001622.716290e-08
0.6253661.7997832.758367e-08
0.6283031.7994082.800641e-08
0.6312541.7990372.843114e-08
0.6342191.798672.885786e-08
0.6371981.7983072.928659e-08
0.6401911.7979472.971733e-08
0.6431981.7975923.015010e-08
0.6462191.797243.058490e-08
0.6492551.7968913.102174e-08
0.651.7968073.112900e-08
0.6523041.7965473.072331e-08
0.6553681.7962053.018388e-08
0.6584461.7958682.964192e-08
0.6615391.7955332.909742e-08
0.6646461.7952022.855035e-08
0.6677681.7948752.800072e-08
0.6709051.7945512.744850e-08
0.6740561.794232.689369e-08
0.6772221.7939122.633628e-08
0.6804031.7935982.577625e-08
0.6835991.7932862.521358e-08
0.686811.7929782.464828e-08
0.6900361.7926732.408031e-08
0.6932771.7923712.350968e-08
0.6965331.7920712.293637e-08
0.6998051.7917752.236037e-08
0.71.7917582.232600e-08
0.7030921.7914822.202978e-08
0.7063941.7911912.171337e-08
0.7097121.7909032.139548e-08
0.7130461.7906182.107609e-08
0.7163951.7903362.075521e-08
0.719761.7900572.043282e-08
0.723141.789782.010891e-08
0.7265371.7895061.978348e-08
0.729951.7892341.945652e-08
0.7333781.7889651.912803e-08
0.7368231.7886981.879800e-08
0.7402841.7884341.846641e-08
0.7437611.7881731.813327e-08
0.7472541.7879131.779856e-08
0.7507641.7876571.746228e-08
0.7542911.7874021.712442e-08
0.7578331.787151.678497e-08
0.7613931.78691.644393e-08
0.7649691.7866531.610129e-08
0.7685621.7864081.575704e-08
0.7721721.7861641.541117e-08
0.7757991.7859241.506367e-08
0.7794431.7856851.471455e-08
0.7831041.7854481.436378e-08
0.7867821.7852141.401137e-08
0.7904781.7849811.365730e-08
0.7941911.7847511.330157e-08
0.7979211.7845221.294417e-08
0.81.7843961.274500e-08
0.8016691.7842961.277159e-08
0.8054351.7840711.283157e-08
0.8092181.7838481.289184e-08
0.8130191.7836281.295239e-08
0.8168371.7834091.301322e-08
0.8206741.7831921.307434e-08
0.8245291.7829771.313574e-08
0.8284021.7827631.319744e-08
0.8322931.7825521.325942e-08
0.8362021.7823421.332170e-08
0.840131.7821341.338426e-08
0.8440761.7819271.344712e-08
0.848041.7817221.351028e-08
0.8520241.7815191.357373e-08
0.8560251.7813181.363749e-08
0.8600461.7811181.370154e-08
0.8640861.780921.376589e-08
0.8681451.7807231.383054e-08
0.8722221.7805281.389550e-08
0.8763191.7803341.396076e-08
0.8804351.7801421.402633e-08
0.8845711.7799511.409221e-08
0.8887251.7797621.415840e-08
0.89291.7795741.422489e-08
0.8970941.7793881.429170e-08
0.91.779261.433800e-08
0.9013071.7792031.435883e-08
0.9055411.7790191.442627e-08
0.9097941.7788371.449402e-08
0.9140671.7786561.456209e-08
0.9183611.7784761.463049e-08
0.9226741.7782981.469920e-08
0.9270081.778121.476824e-08
0.9313621.7779451.483760e-08
0.9357371.777771.490729e-08
0.9401321.7775971.497731e-08
0.9445481.7774241.504765e-08
0.9489851.7772531.511832e-08
0.9534421.7770831.518933e-08
0.957921.7769151.526067e-08
0.962421.7767471.533235e-08
0.966941.776581.540436e-08
0.9714821.7764151.547671e-08
0.9760451.7762511.554940e-08
0.9806291.7760871.562243e-08
0.9852351.7759251.569580e-08
0.9898631.7757641.576952e-08
0.9945131.7756041.584358e-08
0.9991841.7754441.591800e-08
11.7754171.593100e-08
1.003881.7752861.599278e-08
1.008591.7751291.606792e-08
1.013331.7749721.614341e-08
1.018091.7748171.621925e-08
1.022871.7746621.629545e-08
1.027681.7745081.637201e-08
1.03251.7743551.644893e-08
1.037351.7742031.652621e-08
1.042221.7740521.660385e-08
1.047121.7739021.668186e-08
1.052041.7737521.676023e-08
1.056981.7736041.683897e-08
1.061941.7734561.691809e-08
1.066931.7733081.699757e-08
1.071941.7731621.707743e-08
1.076981.7730161.715766e-08
1.082041.7728711.723827e-08
1.087121.7727271.731925e-08
1.092231.7725831.740062e-08
1.097361.772441.748237e-08
1.102511.7722981.756450e-08
1.107691.7721561.764702e-08
1.112891.7720151.772993e-08
1.118121.7718751.781323e-08
1.123371.7717351.789692e-08
1.128651.7715961.798100e-08
1.133951.7714571.806547e-08
1.139271.7713191.815034e-08
1.144631.7711821.823562e-08
1.151.7710451.832129e-08
1.15541.7709081.840736e-08
1.160831.7707721.849384e-08
1.166281.7706371.858072e-08
1.171761.7705021.866802e-08
1.177271.7703681.875572e-08
1.182791.7702331.884383e-08
1.188351.77011.893236e-08
1.193931.7699671.902131e-08
1.199541.7698341.911067e-08
1.21.7698231.911800e-08
1.205171.7697011.948938e-08
1.210831.7695691.989568e-08
1.216521.7694382.030389e-08
1.222241.7693072.071401e-08
1.227981.7691762.112606e-08
1.233741.7690452.154005e-08
1.239541.7689152.195598e-08
1.245361.7687852.237386e-08
1.251211.7686552.279371e-08
1.257091.7685262.321553e-08
1.262991.7683972.363933e-08
1.268931.7682682.406512e-08
1.274891.7681392.449291e-08
1.280871.7680112.492271e-08
1.286891.7678832.535452e-08
1.292931.7677552.578837e-08
1.299011.7676272.622426e-08
1.305111.76752.666219e-08
1.311241.7673732.710218e-08
1.31741.7672452.754423e-08
1.323591.7671182.798836e-08
1.32981.7669912.843458e-08
1.336051.7668652.888290e-08
1.342321.7667382.933332e-08
1.348631.7666112.978585e-08
1.354961.7664853.024051e-08
1.361331.7663593.069731e-08
1.367721.7662323.115625e-08
1.374151.7661063.161735e-08
1.38061.765983.208061e-08
1.387091.7658533.254605e-08
1.39361.7657273.301368e-08
1.41.7656043.347300e-08
1.400151.7656013.349520e-08
1.406721.7654753.449315e-08
1.413331.7653493.549579e-08
1.419971.7652223.650314e-08
1.426641.7650963.751522e-08
1.433341.764973.853205e-08
1.440071.7648433.955366e-08
1.446841.7647174.058007e-08
1.453631.764594.161130e-08
1.460461.7644644.264737e-08
1.467321.7643374.368831e-08
1.474211.764214.473414e-08
1.481141.7640834.578488e-08
1.488091.7639554.684056e-08
1.495081.7638284.790120e-08
1.50211.76374.896681e-08
1.509161.7635735.003744e-08
1.516251.7634455.111309e-08
1.523371.7633165.219379e-08
1.530531.7631885.327957e-08
1.537711.7630595.437045e-08
1.544941.762935.546645e-08
1.552191.7628015.656761e-08
1.559481.7626725.767393e-08
1.566811.7625425.878545e-08
1.574171.7624125.990219e-08
1.581561.7622826.102418e-08
1.588991.7621516.215143e-08
1.596451.762026.328398e-08
1.61.7619586.382200e-08
1.603951.7618896.655212e-08
1.611491.7617577.175526e-08
1.619061.7616257.698283e-08
1.626661.7614928.223496e-08
1.63431.7613598.751176e-08
1.641981.7612269.281335e-08
1.649691.7610929.813983e-08
1.657441.7609581.034913e-07
1.665221.7608241.088680e-07
1.673051.7606891.142699e-07
1.68091.7605531.196971e-07
1.68881.7604171.251499e-07
1.696731.760281.306283e-07
1.70471.7601431.361324e-07
1.712711.7600061.416623e-07
1.720751.7598681.472183e-07
1.728831.7597291.528003e-07
1.736951.759591.584085e-07
1.745111.759451.640431e-07
1.753311.7593091.697042e-07
1.761551.7591681.753918e-07
1.769821.7590261.811062e-07
1.778131.7588841.868474e-07
1.786481.7587411.926155e-07
1.794881.7585971.984108e-07
1.81.758512.019500e-07
1.803311.7584532.044642e-07
1.811781.7583082.109058e-07
1.820291.7581622.173776e-07
1.828841.7580162.238798e-07
1.837431.7578692.304126e-07
1.846061.7577212.369760e-07
1.854731.7575722.435702e-07
1.863441.7574222.501955e-07
1.872191.7572722.568518e-07
1.880991.7571212.635394e-07
1.889821.7569692.702585e-07
1.89871.7568162.770091e-07
1.907621.7566632.837914e-07
1.916581.7565082.906055e-07
1.925581.7563532.974517e-07
1.934621.7561973.043300e-07
1.943711.7560393.112406e-07
1.952841.7558813.181837e-07
1.962011.7557223.251594e-07
1.971231.7555623.321678e-07
1.980491.7554013.392092e-07
1.989791.7552393.462837e-07
1.999131.7550763.533914e-07
21.7550613.540500e-07
2.008521.7549123.709755e-07
2.017961.7547473.897082e-07
2.027441.7545814.085290e-07
2.036961.7544144.274381e-07
2.046531.7542464.464361e-07
2.056141.7540764.655232e-07
2.06581.7539064.847001e-07
2.07551.7537345.039670e-07
2.085251.7535615.233244e-07
2.095041.7533875.427728e-07
2.104881.7532125.623124e-07
2.114771.7530365.819439e-07
2.12471.7528586.016676e-07
2.134681.7526796.214839e-07
2.144711.7524996.413933e-07
2.154781.7523176.613962e-07
2.16491.7521356.814931e-07
2.175071.7519517.016843e-07
2.185291.7517657.219704e-07
2.195551.7515787.423518e-07
2.21.7514977.511800e-07
2.205871.751397.710066e-07
2.216231.7512018.060226e-07
2.226641.751018.412030e-07
2.23711.7508178.765487e-07
2.24761.7506239.120604e-07
2.258161.7504289.477390e-07
2.268771.7502319.835851e-07
2.279421.7500331.019600e-06
2.290131.7498331.055783e-06
2.300891.7496321.092137e-06
2.311691.7494291.128661e-06
2.322551.7492241.165357e-06
2.333461.7490181.202225e-06
2.344421.748811.239267e-06
2.355431.74861.276482e-06
2.36651.7483891.313872e-06
2.377611.7481761.351438e-06
2.388781.7479611.389180e-06
2.41.7477451.427100e-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
—