Optical constants

Refractive index of S-LAM61 (OHARA)

S-LAM61: n,k 0.34–2.4 µm

Data
formula 2 + tabulated k
Range
0.34–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.34–2.4 µm
Refractive index n
1.72
Extinction coefficient k
1.76522e-08
Permittivity ε1
2.95839
Permittivity ε2
6.07236e-08
Absorption coefficient α
0.00377509 cm⁻¹
Penetration depth δ = λ/(2πk)
5.29788e+09 nm
Abbe number Vd
46.025
Chromatic dispersion dn/dλ
-0.0800494 µm⁻¹
Group index ng
1.76704
Group velocity dispersion
148.436 fs²/mm
Dispersion parameter D
-809.797 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-LAM61 (OHARA): S-LAM61
ohara_s_lam61 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-LAM61", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_lam61.range_nm)  # (340, 2400) nm
eps = ohara_s_lam61.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=1.7388333λ2λ2−0.00980244105+0.15093743λ2λ2−0.0433179685+1.12118445λ2λ2−101.214625

Valid from 0.34 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.7388333
C30.00980244105
C40.15093743
C50.0433179685
C61.12118445
C7101.214625

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 2.38e-06 1.36e-08 -3.69e-11 6.21e-07 6.44e-10 0.235
nd
1.720002
Vd
46.024571
glass code
720460
density
value: 4100
thermal expansion
value: 6.6e-06, temperature range: 243 343; value: 8e-06, temperature range: 293 573
dPgF
-0.0035
resistance
acid: 52.2; climatic: 2.0; phosphate: 2.2

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 2.37e-06 K⁻¹ at 633 nm, dn/dT = 1.53e-06 K⁻¹ at 1310 nm, dn/dT = 1.46e-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 424 wavelengths, the same grid as the API and the library
S-LAM61 (OHARA), S-LAM61: n and k versus wavelength
λ (µm)nk
0.341.7720199.487500e-06
0.3416691.7711368.530008e-06
0.3433471.7702667.567814e-06
0.3450331.769416.600896e-06
0.3467271.7685665.629231e-06
0.3484291.7677354.652794e-06
0.351.7669833.751900e-06
0.350141.7669173.722615e-06
0.3518591.766113.363171e-06
0.3535871.7653153.001961e-06
0.3553231.7645322.638978e-06
0.3570681.763762.274213e-06
0.3588211.7629991.907657e-06
0.361.7624961.661100e-06
0.3605831.7622491.613677e-06
0.3623531.761511.469552e-06
0.3641321.7607811.324720e-06
0.365921.7600631.179176e-06
0.3677171.7593541.032918e-06
0.3695221.7586568.859420e-07
0.371.7584738.470400e-07
0.3713361.7579677.947897e-07
0.373161.7572877.235081e-07
0.3749921.7566176.518765e-07
0.3768331.7559565.798932e-07
0.3786831.7553045.075565e-07
0.381.7548474.560800e-07
0.3805431.754664.464751e-07
0.3824111.7540264.134036e-07
0.3842891.7533993.801697e-07
0.3861761.7527813.467726e-07
0.3880721.7521713.132116e-07
0.3899771.751572.794857e-07
0.391.7515622.790800e-07
0.3918921.7509762.616239e-07
0.3938161.7503892.438696e-07
0.395751.7498112.260281e-07
0.3976931.749242.080990e-07
0.3996451.7486761.900819e-07
0.41.7485751.868100e-07
0.4016081.7481191.802540e-07
0.403581.747571.722127e-07
0.4055611.7470271.641319e-07
0.4075521.7464921.560115e-07
0.4095531.7459631.478511e-07
0.4115641.7454411.396507e-07
0.4135851.7449251.314100e-07
0.4156161.7444161.231289e-07
0.4176561.7439131.148071e-07
0.4197071.7434161.064445e-07
0.421.7433461.052500e-07
0.4217681.7429251.025154e-07
0.4238391.7424419.931211e-08
0.425921.7419629.609307e-08
0.4280111.7414899.285822e-08
0.4301121.7410228.960750e-08
0.4322241.740568.634081e-08
0.4343471.7401048.305808e-08
0.4364791.7396547.975923e-08
0.4386221.7392097.644419e-08
0.441.7389277.431300e-08
0.4407761.7387697.357636e-08
0.442941.7383347.152157e-08
0.4451151.7379056.945669e-08
0.44731.7374816.738168e-08
0.4494971.7370616.529647e-08
0.4517041.7366476.320103e-08
0.4539211.7362376.109530e-08
0.456151.7358325.897922e-08
0.458391.7354325.685276e-08
0.461.7351485.532400e-08
0.4606411.7350375.490529e-08
0.4629021.7346465.342680e-08
0.4651751.7342595.194106e-08
0.4674591.7338775.044801e-08
0.4697541.7334994.894764e-08
0.4720611.7331264.743990e-08
0.4743791.7327574.592475e-08
0.4767081.7323924.440217e-08
0.4790481.7320314.287211e-08
0.481.7318864.225000e-08
0.48141.7316744.124869e-08
0.4837641.7313213.955868e-08
0.4861391.7309723.786037e-08
0.4885261.7306273.615372e-08
0.4909251.7302863.443869e-08
0.4933351.7299493.271524e-08
0.4957581.7296153.098333e-08
0.4981921.7292852.924291e-08
0.51.7290432.795000e-08
0.5006381.7289592.776120e-08
0.5030961.7286362.703360e-08
0.5055661.7283172.630243e-08
0.5080481.7280012.556767e-08
0.5105431.7276882.482930e-08
0.513051.727382.408730e-08
0.5155691.7270742.334166e-08
0.51811.7267712.259236e-08
0.5206441.7264722.183938e-08
0.52321.7261762.108271e-08
0.5257691.7258842.032231e-08
0.5283511.7255941.955819e-08
0.5309451.7253071.879031e-08
0.5335521.7250241.801866e-08
0.5361721.7247431.724323e-08
0.5388041.7244661.646399e-08
0.541451.7241911.568092e-08
0.5441081.7239191.489400e-08
0.546781.723651.410322e-08
0.5494641.7233841.330856e-08
0.551.7233311.315000e-08
0.5521621.723121.340890e-08
0.5548731.7228591.373352e-08
0.5575981.7226011.405974e-08
0.5603351.7223461.438756e-08
0.5630871.7220931.471700e-08
0.5658511.7218431.504804e-08
0.568631.7215951.538072e-08
0.5714221.721351.571503e-08
0.5742271.7211071.605098e-08
0.5770471.7208671.638857e-08
0.579881.7206291.672783e-08
0.5827271.7203931.706875e-08
0.5855881.720161.741135e-08
0.5884641.7199291.775563e-08
0.5913531.7197011.810159e-08
0.5942561.7194751.844926e-08
0.5971741.7192511.879864e-08
0.61.7190371.913700e-08
0.6001061.7190291.912936e-08
0.6030531.7188091.891745e-08
0.6060141.7185911.870449e-08
0.6089891.7183761.849049e-08
0.6119791.7181621.827545e-08
0.6149841.7179511.805934e-08
0.6180041.7177421.784218e-08
0.6210381.7175351.762394e-08
0.6240871.7173291.740464e-08
0.6271521.7171261.718426e-08
0.6302311.7169241.696280e-08
0.6333251.7167251.674025e-08
0.6364351.7165271.651661e-08
0.639561.7163311.629187e-08
0.64271.7161371.606602e-08
0.6458561.7159451.583907e-08
0.6490271.7157551.561100e-08
0.651.7156971.554100e-08
0.6522131.7155661.559390e-08
0.6554161.7153791.567044e-08
0.6586341.7151941.574735e-08
0.6618681.715011.582464e-08
0.6651171.7148281.590231e-08
0.6683831.7146481.598036e-08
0.6716651.7144691.605879e-08
0.6749631.7142921.613761e-08
0.6782771.7141171.621681e-08
0.6816071.7139431.629641e-08
0.6849541.713771.637639e-08
0.6883171.7135991.645677e-08
0.6916961.713431.653754e-08
0.6950931.7132621.661871e-08
0.6985051.7130961.670028e-08
0.71.7130231.673600e-08
0.7019351.7129311.665877e-08
0.7053821.7127671.652122e-08
0.7088451.7126051.638300e-08
0.7123251.7124441.624410e-08
0.7158231.7122841.610451e-08
0.7193371.7121261.596424e-08
0.7228691.7119691.582328e-08
0.7264191.7118141.568163e-08
0.7299851.7116591.553929e-08
0.7335691.7115061.539624e-08
0.7371711.7113551.525249e-08
0.7407911.7112041.510804e-08
0.7444281.7110551.496288e-08
0.7480831.7109061.481700e-08
0.7517561.7107591.467041e-08
0.7554471.7106141.452310e-08
0.7591561.7104691.437507e-08
0.7628841.7103251.422630e-08
0.766631.7101831.407681e-08
0.7703941.7100421.392659e-08
0.7741761.7099011.377562e-08
0.7779781.7097621.362392e-08
0.7817971.7096241.347147e-08
0.7856361.7094871.331827e-08
0.7894931.7093511.316432e-08
0.793371.7092161.300961e-08
0.7972651.7090811.285415e-08
0.81.7089881.274500e-08
0.801181.7089481.267918e-08
0.8051131.7088161.245970e-08
0.8090671.7086851.223914e-08
0.8130391.7085541.201750e-08
0.8170311.7084251.179477e-08
0.8210431.7082961.157095e-08
0.8250741.7081691.134603e-08
0.8291251.7080421.112000e-08
0.8331961.7079161.089287e-08
0.8372871.7077911.066462e-08
0.8413981.7076671.043525e-08
0.8455291.7075431.020475e-08
0.8496811.707429.973119e-09
0.8538531.7072999.740352e-09
0.8580451.7071779.506442e-09
0.8622581.7070579.271384e-09
0.8664921.7069379.035172e-09
0.8707461.7068198.797800e-09
0.8750211.70678.559263e-09
0.8793181.7065838.319554e-09
0.8836351.7064668.078669e-09
0.8879741.706357.836600e-09
0.8923341.7062357.593344e-09
0.8967151.706127.348892e-09
0.91.7060357.165600e-09
0.9011181.7060067.263568e-09
0.9055421.7058927.651389e-09
0.9099881.705788.041113e-09
0.9144561.7056678.432752e-09
0.9189461.7055568.826313e-09
0.9234581.7054459.221806e-09
0.9279921.7053349.619242e-09
0.9325491.7052241.001863e-08
0.9371281.7051151.041998e-08
0.9417291.7050061.082329e-08
0.9463531.7048981.122859e-08
0.9509991.704791.163588e-08
0.9556691.7046831.204517e-08
0.9603611.7045761.245647e-08
0.9650761.7044691.286979e-08
0.9698151.7043631.328513e-08
0.9745761.7042581.370252e-08
0.9793621.7041531.412195e-08
0.984171.7040491.454345e-08
0.9890021.7039441.496701e-08
0.9938581.7038411.539266e-08
0.9987381.7037371.582039e-08
11.7037111.593100e-08
1.003641.7036351.581488e-08
1.008571.7035321.565776e-08
1.013521.703431.549987e-08
1.01851.7033281.534120e-08
1.02351.7032271.518175e-08
1.028521.7031261.502152e-08
1.033571.7030251.486050e-08
1.038651.7029241.469870e-08
1.043751.7028241.453609e-08
1.048871.7027241.437269e-08
1.054021.7026251.420849e-08
1.05921.7025251.404348e-08
1.06441.7024261.387766e-08
1.069631.7023271.371103e-08
1.074881.7022291.354358e-08
1.080151.7021311.337530e-08
1.085461.7020321.320620e-08
1.090791.7019351.303627e-08
1.096141.7018371.286551e-08
1.101531.7017391.269391e-08
1.106931.7016421.252146e-08
1.112371.7015451.234817e-08
1.117831.7014481.217403e-08
1.123321.7013511.199903e-08
1.128831.7012541.182317e-08
1.134381.7011581.164645e-08
1.139951.7010611.146886e-08
1.145541.7009651.129040e-08
1.151171.7008691.111106e-08
1.156821.7007731.093085e-08
1.16251.7006771.074975e-08
1.168211.7005811.056775e-08
1.173941.7004851.038487e-08
1.179711.7003891.020109e-08
1.18551.7002931.001640e-08
1.191321.7001979.830810e-09
1.197171.7001029.644306e-09
1.21.7000559.554100e-09
1.203051.7000069.918731e-09
1.208961.699911.062517e-08
1.214891.6998141.133507e-08
1.220861.6997181.204846e-08
1.226851.6996231.276535e-08
1.232871.6995271.348576e-08
1.238931.6994311.420971e-08
1.245011.6993351.493721e-08
1.251121.6992391.566829e-08
1.257271.6991431.640295e-08
1.263441.6990461.714122e-08
1.269641.698951.788312e-08
1.275881.6988541.862866e-08
1.282141.6987571.937786e-08
1.288441.6986612.013074e-08
1.294761.6985642.088731e-08
1.301121.6984672.164760e-08
1.307511.698372.241163e-08
1.313931.6982722.317940e-08
1.320381.6981752.395095e-08
1.326861.6980772.472628e-08
1.333381.6979792.550542e-08
1.339931.6978812.628838e-08
1.34651.6977832.707519e-08
1.353121.6976842.786586e-08
1.359761.6975862.866042e-08
1.366441.6974872.945887e-08
1.373141.6973873.026125e-08
1.379891.6972883.106756e-08
1.386661.6971883.187784e-08
1.393471.6970883.269209e-08
1.41.6969923.347300e-08
1.400311.6969873.348047e-08
1.407191.6968873.364486e-08
1.41411.6967863.381006e-08
1.421041.6966843.397607e-08
1.428021.6965823.414289e-08
1.435031.696483.431054e-08
1.442071.6963783.447901e-08
1.449161.6962753.464830e-08
1.456271.6961723.481843e-08
1.463421.6960683.498939e-08
1.470611.6959643.516119e-08
1.477831.6958593.533384e-08
1.485081.6957543.550733e-08
1.492371.6956493.568167e-08
1.49971.6955433.585687e-08
1.507071.6954373.603294e-08
1.514471.695333.620986e-08
1.52191.6952233.638765e-08
1.529371.6951153.656632e-08
1.536881.6950063.674586e-08
1.544431.6948983.692629e-08
1.552011.6947883.710760e-08
1.559631.6946783.728980e-08
1.567291.6945683.747290e-08
1.574991.6944573.765689e-08
1.582721.6943453.784179e-08
1.590491.6942333.802760e-08
1.59831.694123.821432e-08
1.61.6940953.825500e-08
1.606151.6940064.105901e-08
1.614031.6938924.465685e-08
1.621961.6937774.827235e-08
1.629921.6936625.190561e-08
1.637921.6935465.555670e-08
1.645971.6934295.922572e-08
1.654051.6933116.291276e-08
1.662171.6931936.661790e-08
1.670331.6930747.034123e-08
1.678531.6929547.408284e-08
1.686771.6928347.784283e-08
1.695051.6927138.162127e-08
1.703381.6925918.541827e-08
1.711741.6924688.923391e-08
1.720151.6923449.306829e-08
1.728591.692229.692149e-08
1.737081.6920951.007936e-07
1.745611.6919681.046847e-07
1.754181.6918411.085950e-07
1.762791.6917141.125244e-07
1.771451.6915851.164731e-07
1.780141.6914551.204413e-07
1.788881.6913251.244289e-07
1.797671.6911931.284360e-07
1.81.6911581.295000e-07
1.806491.6910611.367916e-07
1.815361.6909271.467502e-07
1.824281.6907931.567576e-07
1.833231.6906571.668142e-07
1.842241.6905211.769202e-07
1.851281.6903831.870758e-07
1.860371.6902451.972813e-07
1.869511.6901052.075369e-07
1.878681.6899642.178428e-07
1.887911.6898232.281993e-07
1.897181.689682.386067e-07
1.906491.6895362.490652e-07
1.915851.6893912.595750e-07
1.925261.6892442.701365e-07
1.934711.6890972.807498e-07
1.944211.6889482.914152e-07
1.953761.6887983.021329e-07
1.963351.6886473.129033e-07
1.972991.6884953.237266e-07
1.982681.6883413.346030e-07
1.992411.6881863.455329e-07
21.6880653.540500e-07
2.00221.688033.616500e-07
2.012031.6878723.956618e-07
2.021911.6877134.298405e-07
2.031831.6875534.641871e-07
2.041811.6873914.987023e-07
2.051841.6872285.333870e-07
2.061911.6870635.682419e-07
2.072031.6868986.032680e-07
2.082211.686736.384661e-07
2.092431.6865616.738370e-07
2.10271.6863917.093816e-07
2.113031.6862197.451007e-07
2.12341.6860457.809952e-07
2.133831.685878.170659e-07
2.144311.6856948.533137e-07
2.154831.6855158.897395e-07
2.165411.6853369.263442e-07
2.176051.6851549.631286e-07
2.186731.6849711.000094e-06
2.197471.6847861.037240e-06
2.21.6847421.046000e-06
2.208261.6845991.178768e-06
2.21911.6844111.353098e-06
2.231.6842211.528285e-06
2.240941.6840291.704331e-06
2.251951.6838351.881242e-06
2.2631.6836392.059021e-06
2.274121.6834422.237673e-06
2.285281.6832422.417203e-06
2.29651.6830412.597614e-06
2.307781.6828382.778911e-06
2.319111.6826322.961097e-06
2.33051.6824253.144179e-06
2.341941.6822163.328159e-06
2.353441.6820043.513043e-06
2.364991.6817913.698834e-06
2.37661.6815753.885538e-06
2.388271.6813574.073158e-06
2.41.6811374.261700e-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
—