Optical constants

Refractive index of S-LAM2 (OHARA)

S-LAM2: 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
1.74399
Extinction coefficient k
1.40486e-08
Permittivity ε1
3.04151
Permittivity ε2
4.90015e-08
Absorption coefficient α
0.00300443 cm⁻¹
Penetration depth δ = λ/(2πk)
6.65683e+09 nm
Abbe number Vd
44.786
Chromatic dispersion dn/dλ
-0.0849114 µm⁻¹
Group index ng
1.79389
Group velocity dispersion
158.736 fs²/mm
Dispersion parameter D
-865.992 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-LAM2 (OHARA): S-LAM2
ohara_s_lam2 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-LAM2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_lam2.range_nm)  # (340, 2400) nm
eps = ohara_s_lam2.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=1.7713λ2λ2−0.00976652444+0.19581423λ2λ2−0.0412718628+1.19487834λ2λ2−110.458122

Valid from 0.34 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.7713
C30.00976652444
C40.19581423
C50.0412718628
C61.19487834
C7110.458122

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 3.01e-07 1.12e-08 -3.68e-11 6.07e-07 6.45e-10 0.245
nd
1.743997
Vd
44.786431
glass code
744448
density
value: 4320
thermal expansion
value: 7.4e-06, temperature range: 243 343; value: 8.7e-06, temperature range: 293 573
dPgF
-0.0035
resistance
acid: 52.2; climatic: 2.0; phosphate: 3.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 1.21e-06 K⁻¹ at 633 nm, dn/dT = 3.81e-07 K⁻¹ at 1310 nm, dn/dT = 3.18e-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 424 wavelengths, the same grid as the API and the library
S-LAM2 (OHARA), S-LAM2: n and k versus wavelength
λ (µm)nk
0.341.7994588.709100e-06
0.3416691.7985167.830770e-06
0.3433471.7975886.948127e-06
0.3450331.7966746.061151e-06
0.3467271.7957735.169819e-06
0.3484291.7948864.274111e-06
0.351.7940833.447700e-06
0.350141.7940123.420582e-06
0.3518591.7931513.087733e-06
0.3535871.7923032.753250e-06
0.3553231.7914672.417124e-06
0.3570681.7906432.079348e-06
0.3588211.789831.739914e-06
0.361.7892931.511600e-06
0.3605831.789031.466159e-06
0.3623531.788241.328057e-06
0.3641321.7874621.189278e-06
0.365921.7866951.049816e-06
0.3677171.7859389.096704e-07
0.3695221.7851927.688363e-07
0.371.7849977.315600e-07
0.3713361.7844576.900709e-07
0.373161.7837316.334701e-07
0.3749921.7830155.765914e-07
0.3768331.782315.194333e-07
0.3786831.7816134.619947e-07
0.381.7811254.211200e-07
0.3805431.7809264.113979e-07
0.3824111.7802493.779228e-07
0.3842891.779583.442833e-07
0.3861761.778923.104787e-07
0.3880721.7782692.765081e-07
0.3899771.7776262.423707e-07
0.391.7776192.419600e-07
0.3918921.7769922.270731e-07
0.3938161.7763672.119317e-07
0.395751.7757491.967161e-07
0.3976931.7751391.814257e-07
0.3996451.7745381.660603e-07
0.41.7744291.632700e-07
0.4016081.7739431.574994e-07
0.403581.7733571.504215e-07
0.4055611.7727781.433088e-07
0.4075521.7722061.361612e-07
0.4095531.7716421.289784e-07
0.4115641.7710851.217605e-07
0.4135851.7705341.145070e-07
0.4156161.7699911.072180e-07
0.4176561.7694549.989316e-08
0.4197071.7689249.253237e-08
0.421.7688499.148100e-08
0.4217681.7684018.870152e-08
0.4238391.7678848.544561e-08
0.425921.7673738.217371e-08
0.4280111.7668687.888574e-08
0.4301121.766377.558164e-08
0.4322241.7658787.226131e-08
0.4343471.7653926.892468e-08
0.4364791.7649116.557166e-08
0.4386221.7644366.220218e-08
0.441.7641366.003600e-08
0.4407761.7639675.956517e-08
0.442941.7635045.825183e-08
0.4451151.7630465.693205e-08
0.44731.7625945.560578e-08
0.4494971.7621475.427300e-08
0.4517041.7617055.293368e-08
0.4539211.7612685.158778e-08
0.456151.7608375.023527e-08
0.458391.760414.887612e-08
0.461.7601084.789900e-08
0.4606411.7599894.734758e-08
0.4629021.7595724.540046e-08
0.4651751.759164.344378e-08
0.4674591.7587534.147750e-08
0.4697541.7583513.950155e-08
0.4720611.7579533.751591e-08
0.4743791.757563.552052e-08
0.4767081.7571713.351533e-08
0.4790481.7567863.150030e-08
0.481.7566323.068100e-08
0.48141.7564062.992918e-08
0.4837641.7560312.866025e-08
0.4861391.7556592.738509e-08
0.4885261.7552922.610367e-08
0.4909251.7549292.481596e-08
0.4933351.7545692.352193e-08
0.4957581.7542142.222154e-08
0.4981921.7538632.091477e-08
0.51.7536061.994400e-08
0.5006381.7535161.985733e-08
0.5030961.7531721.952332e-08
0.5055661.7528321.918768e-08
0.5080481.7524961.885038e-08
0.5105431.7521641.851143e-08
0.513051.7518351.817081e-08
0.5155691.751511.782852e-08
0.51811.7511891.748455e-08
0.5206441.750871.713890e-08
0.52321.7505561.679154e-08
0.5257691.7502441.644248e-08
0.5283511.7499361.609170e-08
0.5309451.7496321.573921e-08
0.5335521.749331.538498e-08
0.5361721.7490321.502901e-08
0.5388041.7487371.467130e-08
0.541451.7484451.431183e-08
0.5441081.7481561.395059e-08
0.546781.747871.358758e-08
0.5494641.7475871.322279e-08
0.551.7475311.315000e-08
0.5521621.7473071.320168e-08
0.5548731.747031.326647e-08
0.5575981.7467561.333158e-08
0.5603351.7464851.339702e-08
0.5630871.7462171.346277e-08
0.5658511.7459511.352885e-08
0.568631.7456881.359525e-08
0.5714221.7454281.366198e-08
0.5742271.745171.372903e-08
0.5770471.7449151.379642e-08
0.579881.7446631.386413e-08
0.5827271.7444131.393218e-08
0.5855881.7441651.400056e-08
0.5884641.743921.406928e-08
0.5913531.7436781.413833e-08
0.5942561.7434381.420773e-08
0.5971741.74321.427746e-08
0.61.7429741.434500e-08
0.6001061.7429651.434754e-08
0.6030531.7427321.441802e-08
0.6060141.7425021.448885e-08
0.6089891.7422731.456002e-08
0.6119791.7420471.463155e-08
0.6149841.7418231.470342e-08
0.6180041.7416011.477565e-08
0.6210381.7413821.484823e-08
0.6240871.7411641.492117e-08
0.6271521.7409491.499447e-08
0.6302311.7407361.506812e-08
0.6333251.7405241.514214e-08
0.6364351.7403151.521652e-08
0.639561.7401081.529127e-08
0.64271.7399031.536638e-08
0.6458561.7396991.544186e-08
0.6490271.7394981.551772e-08
0.651.7394371.554100e-08
0.6522131.7392981.534671e-08
0.6554161.7391011.506561e-08
0.6586341.7389051.478313e-08
0.6618681.7387111.449926e-08
0.6651171.7385181.421400e-08
0.6683831.7383281.392733e-08
0.6716651.7381391.363926e-08
0.6749631.7379521.334978e-08
0.6782771.7377671.305887e-08
0.6816071.7375831.276654e-08
0.6849541.7374011.247277e-08
0.6883171.737221.217756e-08
0.6916961.7370421.188090e-08
0.6950931.7368641.158278e-08
0.6985051.7366891.128320e-08
0.71.7366131.115200e-08
0.7019351.7365151.105945e-08
0.7053821.7363421.089462e-08
0.7088451.7361711.072898e-08
0.7123251.7360011.056253e-08
0.7158231.7358331.039526e-08
0.7193371.7356661.022717e-08
0.7228691.7355011.005825e-08
0.7264191.7353379.888503e-09
0.7299851.7351759.717923e-09
0.7335691.7350149.546506e-09
0.7371711.7348549.374246e-09
0.7407911.7346959.201141e-09
0.7444281.7345389.027186e-09
0.7480831.7343828.852377e-09
0.7517561.7342288.676709e-09
0.7554471.7340748.500179e-09
0.7591561.7339228.322782e-09
0.7628841.7337718.144515e-09
0.766631.7336227.965371e-09
0.7703941.7334737.785349e-09
0.7741761.7333267.604442e-09
0.7779781.733187.422647e-09
0.7817971.7330357.239960e-09
0.7856361.7328917.056376e-09
0.7894931.7327486.871890e-09
0.793371.7326066.686498e-09
0.7972651.7324656.500196e-09
0.81.7323686.369400e-09
0.801181.7323266.548108e-09
0.8051131.7321877.144017e-09
0.8090671.732057.742852e-09
0.8130391.7319138.344627e-09
0.8170311.7317788.949357e-09
0.8210431.7316439.557056e-09
0.8250741.7315091.016774e-08
0.8291251.7313771.078142e-08
0.8331961.7312451.139811e-08
0.8372871.7311141.201784e-08
0.8413981.7309841.264060e-08
0.8455291.7308551.326643e-08
0.8496811.7307271.389532e-08
0.8538531.73061.452730e-08
0.8580451.7304731.516239e-08
0.8622581.7303481.580060e-08
0.8664921.7302231.644193e-08
0.8707461.7300991.708642e-08
0.8750211.7299761.773407e-08
0.8793181.7298531.838490e-08
0.8836351.7297321.903893e-08
0.8879741.7296111.969617e-08
0.8923341.7294912.035664e-08
0.8967151.7293712.102034e-08
0.91.7292832.151800e-08
0.9011181.7292532.154472e-08
0.9055421.7291352.165051e-08
0.9099881.7290172.175682e-08
0.9144561.7289012.186365e-08
0.9189461.7287852.197100e-08
0.9234581.7286692.207889e-08
0.9279921.7285552.218730e-08
0.9325491.7284412.229624e-08
0.9371281.7283272.240572e-08
0.9417291.7282142.251574e-08
0.9463531.7281022.262629e-08
0.9509991.727992.273739e-08
0.9556691.7278792.284903e-08
0.9603611.7277692.296123e-08
0.9650761.7276592.307397e-08
0.9698151.7275492.318727e-08
0.9745761.727442.330112e-08
0.9793621.7273322.341553e-08
0.984171.7272242.353051e-08
0.9890021.7271162.364605e-08
0.9938581.7270092.376215e-08
0.9987381.7269022.387883e-08
11.7268752.390900e-08
1.003641.7267962.364761e-08
1.008571.7266912.329391e-08
1.013521.7265852.293848e-08
1.01851.7264812.258131e-08
1.02351.7263762.222238e-08
1.028521.7262722.186169e-08
1.033571.7261682.149923e-08
1.038651.7260652.113499e-08
1.043751.7259622.076896e-08
1.048871.725862.040113e-08
1.054021.7257582.003150e-08
1.05921.7256561.966005e-08
1.06441.7255541.928678e-08
1.069631.7254531.891167e-08
1.074881.7253521.853473e-08
1.080151.7252511.815593e-08
1.085461.7251511.777527e-08
1.090791.7250511.739275e-08
1.096141.7249511.700834e-08
1.101531.7248511.662205e-08
1.106931.7247521.623386e-08
1.112371.7246521.584377e-08
1.117831.7245541.545176e-08
1.123321.7244551.505782e-08
1.128831.7243561.466196e-08
1.134381.7242581.426414e-08
1.139951.724161.386438e-08
1.145541.7240621.346265e-08
1.151171.7239641.305895e-08
1.156821.7238661.265327e-08
1.16251.7237681.224559e-08
1.168211.7236711.183591e-08
1.173941.7235731.142423e-08
1.179711.7234761.101052e-08
1.18551.7233791.059478e-08
1.191321.7232821.017699e-08
1.197171.7231859.757162e-09
1.21.7231389.554100e-09
1.203051.7230889.918731e-09
1.208961.7229911.062517e-08
1.214891.7228941.133507e-08
1.220861.7227971.204846e-08
1.226851.72271.276535e-08
1.232871.7226031.348576e-08
1.238931.7225071.420971e-08
1.245011.722411.493721e-08
1.251121.7223131.566829e-08
1.257271.7222161.640295e-08
1.263441.7221191.714122e-08
1.269641.7220221.788312e-08
1.275881.7219251.862866e-08
1.282141.7218281.937786e-08
1.288441.7217312.013074e-08
1.294761.7216342.088731e-08
1.301121.7215362.164760e-08
1.307511.7214392.241163e-08
1.313931.7213412.317940e-08
1.320381.7212432.395095e-08
1.326861.7211462.472628e-08
1.333381.7210482.550542e-08
1.339931.7209492.628838e-08
1.34651.7208512.707519e-08
1.353121.7207532.786586e-08
1.359761.7206542.866042e-08
1.366441.7205552.945887e-08
1.373141.7204563.026125e-08
1.379891.7203563.106756e-08
1.386661.7202573.187784e-08
1.393471.7201573.269209e-08
1.41.7200613.347300e-08
1.400311.7200573.350041e-08
1.407191.7199573.410405e-08
1.41411.7198563.471064e-08
1.421041.7197553.532022e-08
1.428021.7196543.593278e-08
1.435031.7195523.654836e-08
1.442071.719453.716695e-08
1.449161.7193483.778859e-08
1.456271.7192463.841328e-08
1.463421.7191433.904103e-08
1.470611.719043.967187e-08
1.477831.7189364.030580e-08
1.485081.7188324.094285e-08
1.492371.7187284.158302e-08
1.49971.7186234.222634e-08
1.507071.7185184.287281e-08
1.514471.7184124.352246e-08
1.52191.7183064.417530e-08
1.529371.7181994.483135e-08
1.536881.7180924.549061e-08
1.544431.7179854.615312e-08
1.552011.7178774.681887e-08
1.559631.7177694.748790e-08
1.567291.717664.816021e-08
1.574991.717554.883582e-08
1.582721.717444.951475e-08
1.590491.717335.019701e-08
1.59831.7172195.088262e-08
1.61.7171945.103200e-08
1.606151.7171075.477799e-08
1.614031.7169955.958449e-08
1.621961.7168826.441460e-08
1.629921.7167686.926841e-08
1.637921.7166547.414606e-08
1.645971.716547.904766e-08
1.654051.7164248.397333e-08
1.662171.7163088.892318e-08
1.670331.7161929.389733e-08
1.678531.7160749.889591e-08
1.686771.7159561.039190e-07
1.695051.7158381.089668e-07
1.703381.7157181.140394e-07
1.711741.7155981.191369e-07
1.720151.7154771.242594e-07
1.728591.7153551.294070e-07
1.737081.7152331.345799e-07
1.745611.715111.397783e-07
1.754181.7149861.450021e-07
1.762791.7148611.502516e-07
1.771451.7147351.555269e-07
1.780141.7146081.608281e-07
1.788881.7144811.661553e-07
1.797671.7143531.715086e-07
1.81.7143191.729300e-07
1.806491.7142241.825235e-07
1.815361.7140941.956260e-07
1.824281.7139632.087928e-07
1.833231.7138312.220243e-07
1.842241.7136982.353207e-07
1.851281.7135642.486824e-07
1.860371.7134292.621097e-07
1.869511.7132942.756030e-07
1.878681.7131572.891625e-07
1.887911.7130193.027885e-07
1.897181.712883.164815e-07
1.906491.712743.302417e-07
1.915851.7125993.440695e-07
1.925261.7124573.579651e-07
1.934711.7123143.719290e-07
1.944211.712173.859615e-07
1.953761.7120254.000628e-07
1.963351.7118784.142334e-07
1.972991.711734.284736e-07
1.982681.7115814.427837e-07
1.992411.7114314.571640e-07
21.7113144.683700e-07
2.00221.711284.775943e-07
2.012031.7111275.188748e-07
2.021911.7109745.603581e-07
2.031831.7108186.020450e-07
2.041811.7106626.439366e-07
2.051841.7105046.860339e-07
2.061911.7103457.283379e-07
2.072031.7101857.708496e-07
2.082211.7100238.135701e-07
2.092431.709868.565003e-07
2.10271.7096958.996413e-07
2.113031.7095299.429941e-07
2.12341.7093629.865597e-07
2.133831.7091931.030339e-06
2.144311.7090231.074334e-06
2.154831.7088511.118544e-06
2.165411.7086771.162972e-06
2.176051.7085021.207618e-06
2.186731.7083261.252483e-06
2.197471.7081481.297568e-06
2.21.7081051.308200e-06
2.208261.7079681.440064e-06
2.21911.7077861.613207e-06
2.231.7076031.787200e-06
2.240941.7074181.962048e-06
2.251951.7072322.137754e-06
2.2631.7070442.314322e-06
2.274121.7068542.491758e-06
2.285281.7066622.670065e-06
2.29651.7064682.849247e-06
2.307781.7062733.029309e-06
2.319111.7060763.210255e-06
2.33051.7058763.392090e-06
2.341941.7056753.574817e-06
2.353441.7054723.758442e-06
2.364991.7052673.942968e-06
2.37661.705064.128400e-06
2.388271.7048524.314742e-06
2.41.7046414.502000e-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
—