Optical constants

Refractive index of S-LAM52 (OHARA)

S-LAM52: n,k 0.35–2.4 µm

Data
formula 2 + tabulated k
Range
0.35–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.35–2.4 µm
Refractive index n
1.72
Extinction coefficient k
1.87414e-08
Permittivity ε1
2.95839
Permittivity ε2
6.44704e-08
Absorption coefficient α
0.00400803 cm⁻¹
Penetration depth δ = λ/(2πk)
4.98998e+09 nm
Abbe number Vd
43.69
Chromatic dispersion dn/dλ
-0.0840826 µm⁻¹
Group index ng
1.7694
Group velocity dispersion
158.444 fs²/mm
Dispersion parameter D
-864.398 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-LAM52 (OHARA): S-LAM52
ohara_s_lam52 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-LAM52", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_lam52.range_nm)  # (350, 2400) nm
eps = ohara_s_lam52.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=1.73442942λ2λ2−0.0100690928+0.15155391λ2λ2−0.0470634701+1.46225433λ2λ2−140.084396

Valid from 0.35 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.73442942
C30.0100690928
C40.15155391
C50.0470634701
C61.46225433
C7140.084396

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -1.33e-06 1.04e-08 -3.33e-11 6.18e-07 7.64e-10 0.246
nd
1.720000
Vd
43.689812
glass code
720437
density
value: 3950
thermal expansion
value: 7.7e-06, temperature range: 243 343; value: 8.8e-06, temperature range: 293 573
dPgF
-0.0009
resistance
acid: 51.2; climatic: 2.0; phosphate: 1.2

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 2.76e-07 K⁻¹ at 633 nm, dn/dT = -5.30e-07 K⁻¹ at 1310 nm, dn/dT = -5.89e-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 423 wavelengths, the same grid as the API and the library
S-LAM52 (OHARA), S-LAM52: n and k versus wavelength
λ (µm)nk
0.351.7704776.413200e-06
0.3516931.76965.784157e-06
0.3533941.7687375.152071e-06
0.3551031.7678884.516928e-06
0.3568211.7670513.878713e-06
0.3585471.7662273.237411e-06
0.361.7655462.697500e-06
0.3602811.7654162.657311e-06
0.3620241.7646162.408267e-06
0.3637751.7638282.158018e-06
0.3655351.7630521.906559e-06
0.3673031.7622871.653884e-06
0.3690791.7615341.399987e-06
0.371.7611491.268400e-06
0.3708641.7607911.217083e-06
0.3726581.7600591.110595e-06
0.3744611.7593371.003591e-06
0.3762721.7586258.960703e-07
0.3780921.7579247.880290e-07
0.3799211.7572326.794652e-07
0.381.7572036.747700e-07
0.3817591.756556.258748e-07
0.3836051.7558785.745334e-07
0.3854611.7552145.229437e-07
0.3873251.754564.711044e-07
0.3891991.7539154.190144e-07
0.391.7536423.967300e-07
0.3910811.7532783.788137e-07
0.3929731.752653.474636e-07
0.3948731.752033.159618e-07
0.3967831.7514192.843076e-07
0.3987031.7508162.525004e-07
0.41.7504142.310000e-07
0.4006311.750222.274678e-07
0.4025691.7496332.166237e-07
0.4045161.7490532.057272e-07
0.4064731.7484811.947779e-07
0.4084391.7479161.837757e-07
0.4104151.7473581.727202e-07
0.41241.7468081.616113e-07
0.4143941.7462651.504486e-07
0.4163991.7457281.392320e-07
0.4184131.7451991.279610e-07
0.421.7447881.190800e-07
0.4204371.7446761.182586e-07
0.422471.7441591.144347e-07
0.4245141.7436491.105923e-07
0.4265671.7431461.067312e-07
0.4286311.7426481.028516e-07
0.4307041.7421579.895309e-08
0.4327871.7416729.503577e-08
0.434881.7411939.109950e-08
0.4369841.740728.714419e-08
0.4390981.7402528.316975e-08
0.441.7400558.147300e-08
0.4412221.739798.010305e-08
0.4433561.7393347.770958e-08
0.44551.7388837.530454e-08
0.4476551.7384387.288786e-08
0.449821.7379987.045949e-08
0.4519961.7375636.801938e-08
0.4541821.7371336.556746e-08
0.4563791.7367086.310368e-08
0.4585871.7362896.062799e-08
0.461.7360245.904300e-08
0.4608051.7358745.852268e-08
0.4630341.7354645.708182e-08
0.4652731.7350595.563398e-08
0.4675241.7346595.417914e-08
0.4697851.7342635.271727e-08
0.4720581.7338725.124832e-08
0.4743411.7334854.977227e-08
0.4766351.7331034.828908e-08
0.4789411.7327254.679871e-08
0.481.7325544.611400e-08
0.4812571.7323524.522406e-08
0.4835851.7319824.357654e-08
0.4859241.7316174.192106e-08
0.4882751.7312564.025757e-08
0.4906361.7308993.858603e-08
0.493011.7305463.690641e-08
0.4953941.7301973.521867e-08
0.4977911.7298523.352276e-08
0.51.7295393.195900e-08
0.5001981.7295113.190182e-08
0.5026181.7291733.120420e-08
0.5050491.728843.050320e-08
0.5074921.7285092.979882e-08
0.5099461.7281832.909103e-08
0.5124131.727862.837981e-08
0.5148921.7275412.766516e-08
0.5173821.7272252.694704e-08
0.5198851.7269122.622546e-08
0.5223991.7266032.550038e-08
0.5249261.7262972.477180e-08
0.5274651.7259952.403969e-08
0.5300161.7256952.330404e-08
0.532581.7253992.256484e-08
0.5351561.7251062.182205e-08
0.5377451.7248172.107568e-08
0.5403461.724532.032569e-08
0.5429591.7242461.957208e-08
0.5455861.7239651.881482e-08
0.5482251.7236881.805390e-08
0.551.7235031.754200e-08
0.5508761.7234131.756996e-08
0.5535411.7231411.765496e-08
0.5562181.7228711.774037e-08
0.5589091.7226051.782619e-08
0.5616121.7223411.791243e-08
0.5643291.722081.799909e-08
0.5670581.7218221.808616e-08
0.5698011.7215661.817366e-08
0.5725571.7213131.826158e-08
0.5753271.7210631.834992e-08
0.578111.7208151.843869e-08
0.5809061.720571.852790e-08
0.5837161.7203271.861753e-08
0.5865391.7200861.870760e-08
0.5893761.7198481.879810e-08
0.5922271.7196121.888904e-08
0.5950911.7193791.898042e-08
0.597971.7191481.907224e-08
0.61.7189871.913700e-08
0.6008621.7189191.925411e-08
0.6037691.7186921.964885e-08
0.6066891.7184682.004550e-08
0.6096231.7182462.044406e-08
0.6125721.7180262.084456e-08
0.6155351.7178082.124699e-08
0.6185131.7175932.165137e-08
0.6215041.7173792.205770e-08
0.624511.7171672.246600e-08
0.6275311.7169582.287628e-08
0.6305661.716752.328854e-08
0.6336161.7165452.370279e-08
0.6366811.7163412.411905e-08
0.6397611.7161392.453732e-08
0.6428551.715942.495761e-08
0.6459651.7157422.537994e-08
0.6490891.7155462.580431e-08
0.651.7154892.592800e-08
0.6522291.7153512.551823e-08
0.6553841.7151592.493826e-08
0.6585541.7149682.435547e-08
0.6617391.7147792.376987e-08
0.664941.7145922.318143e-08
0.6681561.7144072.259015e-08
0.6713881.7142232.199601e-08
0.6746361.7140412.139900e-08
0.6778991.713862.079909e-08
0.6811781.7136812.019629e-08
0.6844731.7135041.959057e-08
0.6877831.7133281.898192e-08
0.691111.7131541.837033e-08
0.6944531.7129821.775577e-08
0.6978121.7128111.713825e-08
0.71.71271.673600e-08
0.7011871.7126411.668862e-08
0.7045791.7124731.655326e-08
0.7079871.7123061.641724e-08
0.7114111.7121411.628057e-08
0.7148521.7119771.614324e-08
0.718311.7118151.600524e-08
0.7217851.7116541.586658e-08
0.7252761.7114941.572724e-08
0.7287841.7113361.558723e-08
0.7323091.7111791.544655e-08
0.7358511.7110231.530518e-08
0.739411.7108691.516313e-08
0.7429871.7107151.502039e-08
0.7465811.7105641.487696e-08
0.7501921.7104131.473284e-08
0.7538211.7102631.458802e-08
0.7574671.7101151.444250e-08
0.7611311.7099681.429628e-08
0.7648121.7098221.414935e-08
0.7685111.7096781.400171e-08
0.7722291.7095341.385335e-08
0.7759641.7093911.370428e-08
0.7797171.709251.355448e-08
0.7834891.709111.340397e-08
0.7872781.7089711.325272e-08
0.7910861.7088321.310074e-08
0.7949131.7086951.294803e-08
0.7987581.7085591.279457e-08
0.81.7085161.274500e-08
0.8026211.7084241.297497e-08
0.8065041.708291.331556e-08
0.8104051.7081571.365780e-08
0.8143251.7080251.400169e-08
0.8182631.7078941.434725e-08
0.8222211.7077631.469447e-08
0.8261981.7076341.504338e-08
0.8301951.7075061.539397e-08
0.834211.7073781.574626e-08
0.8382451.7072511.610026e-08
0.84231.7071261.645596e-08
0.8463741.7070011.681339e-08
0.8504681.7068771.717254e-08
0.8545811.7067531.753343e-08
0.8587151.7066311.789607e-08
0.8628691.7065091.826046e-08
0.8670421.7063881.862662e-08
0.8712361.7062681.899455e-08
0.875451.7061491.936425e-08
0.8796851.7060311.973574e-08
0.883941.7059132.010903e-08
0.8882151.7057962.048413e-08
0.8925121.7056792.086104e-08
0.8968291.7055642.123977e-08
0.91.7054792.151800e-08
0.9011671.7054492.154589e-08
0.9055251.7053342.165011e-08
0.9099051.7052212.175484e-08
0.9143071.7051082.186007e-08
0.9187291.7049952.196581e-08
0.9231731.7048842.207206e-08
0.9276381.7047722.217883e-08
0.9321251.7046622.228611e-08
0.9366341.7045522.239391e-08
0.9411641.7044432.250224e-08
0.9457171.7043342.261108e-08
0.9502911.7042262.272046e-08
0.9548881.7041182.283036e-08
0.9595061.7040112.294079e-08
0.9641471.7039042.305176e-08
0.9688111.7037982.316327e-08
0.9734971.7036932.327531e-08
0.9782061.7035882.338790e-08
0.9829371.7034832.350103e-08
0.9876921.7033792.361471e-08
0.9924691.7032752.372894e-08
0.997271.7031722.384372e-08
11.7031142.390900e-08
1.002091.7030692.385885e-08
1.006941.7029672.374274e-08
1.011811.7028652.362607e-08
1.016711.7027642.350883e-08
1.021621.7026622.339103e-08
1.026561.7025622.327265e-08
1.031531.7024612.315370e-08
1.036521.7023612.303418e-08
1.041531.7022622.291408e-08
1.046571.7021622.279340e-08
1.051631.7020632.267213e-08
1.056721.7019652.255028e-08
1.061831.7018662.242784e-08
1.066971.7017682.230481e-08
1.072131.7016712.218118e-08
1.077311.7015732.205695e-08
1.082521.7014762.193213e-08
1.087761.7013792.180669e-08
1.093021.7012832.168066e-08
1.098311.7011862.155401e-08
1.103621.701092.142675e-08
1.108961.7009942.129887e-08
1.114321.7008992.117038e-08
1.119711.7008032.104126e-08
1.125131.7007082.091152e-08
1.130571.7006132.078115e-08
1.136041.7005182.065016e-08
1.141541.7004232.051852e-08
1.147061.7003282.038626e-08
1.152611.7002342.025335e-08
1.158181.700142.011980e-08
1.163781.7000451.998560e-08
1.169411.6999511.985075e-08
1.175071.6998581.971525e-08
1.180751.6997641.957910e-08
1.186461.699671.944229e-08
1.19221.6995761.930481e-08
1.197971.6994831.916667e-08
1.21.699451.911800e-08
1.203761.6993891.938807e-08
1.209591.6992961.980598e-08
1.215441.6992022.022591e-08
1.221311.6991092.064788e-08
1.227221.6990162.107189e-08
1.233161.6989222.149794e-08
1.239121.6988292.192606e-08
1.245121.6987362.235625e-08
1.251141.6986422.278852e-08
1.257191.6985492.322288e-08
1.263271.6984562.365934e-08
1.269381.6983622.409791e-08
1.275521.6982692.453861e-08
1.281691.6981752.498143e-08
1.287891.6980822.542640e-08
1.294121.6979882.587352e-08
1.300381.6978942.632281e-08
1.306671.69782.677426e-08
1.312991.6977062.722790e-08
1.319341.6976122.768373e-08
1.325721.6975182.814177e-08
1.332141.6974242.860203e-08
1.338581.697332.906451e-08
1.345051.6972352.952922e-08
1.351561.697142.999619e-08
1.35811.6970453.046541e-08
1.364671.696953.093691e-08
1.371271.6968553.141068e-08
1.37791.6967593.188675e-08
1.384561.6966643.236512e-08
1.391261.6965683.284580e-08
1.397991.6964723.332880e-08
1.41.6964433.347300e-08
1.404751.6963753.389029e-08
1.411551.6962793.448683e-08
1.418381.6961823.508626e-08
1.425241.6960853.568859e-08
1.432131.6959873.629383e-08
1.439061.6958893.690200e-08
1.446021.6957913.751311e-08
1.453011.6956933.812718e-08
1.460041.6955953.874421e-08
1.46711.6954963.936423e-08
1.47421.6953963.998725e-08
1.481331.6952974.061328e-08
1.488491.6951974.124235e-08
1.495691.6950964.187445e-08
1.502931.6949964.250961e-08
1.51021.6948944.314785e-08
1.51751.6947934.378917e-08
1.524841.6946914.443359e-08
1.532221.6945894.508113e-08
1.539631.6944864.573180e-08
1.547081.6943834.638562e-08
1.554561.6942794.704260e-08
1.562081.6941754.770276e-08
1.569641.694074.836612e-08
1.577231.6939654.903268e-08
1.584861.693864.970246e-08
1.592521.6937545.037549e-08
1.61.693655.103200e-08
1.600231.6936475.113662e-08
1.607971.693545.473303e-08
1.615741.6934325.834684e-08
1.623561.6933246.197812e-08
1.631411.6932156.562698e-08
1.63931.6931066.929348e-08
1.647231.6929967.297771e-08
1.65521.6928867.667977e-08
1.663211.6927758.039973e-08
1.671251.6926638.413768e-08
1.679331.6925518.789372e-08
1.687461.6924389.166792e-08
1.695621.6923249.546038e-08
1.703821.692219.927119e-08
1.712061.6920951.031004e-07
1.720341.6919791.069482e-07
1.728661.6918631.108145e-07
1.737031.6917461.146996e-07
1.745431.6916281.186035e-07
1.753871.6915091.225262e-07
1.762351.691391.264679e-07
1.770881.691271.304287e-07
1.779441.6911491.344087e-07
1.788051.6910281.384079e-07
1.79671.6909051.424264e-07
1.81.6908591.439600e-07
1.805391.6907821.491834e-07
1.814121.6906581.576461e-07
1.82291.6905331.661498e-07
1.831711.6904081.746946e-07
1.840571.6902811.832808e-07
1.849481.6901541.919084e-07
1.858421.6900252.005779e-07
1.867411.6898962.092892e-07
1.876441.6897662.180427e-07
1.885521.6896352.268385e-07
1.894641.6895032.356768e-07
1.903811.689372.445579e-07
1.913011.6892362.534820e-07
1.922271.6891012.624492e-07
1.931571.6889652.714599e-07
1.940911.6888282.805140e-07
1.95031.688692.896120e-07
1.959731.6885512.987540e-07
1.969211.6884113.079402e-07
1.978731.6882693.171709e-07
1.98831.6881273.264462e-07
1.997921.6879843.357663e-07
21.6879533.377800e-07
2.007591.6878393.611293e-07
2.01731.6876933.910180e-07
2.027051.6875464.210513e-07
2.036861.6873984.512298e-07
2.046711.6872494.815544e-07
2.056611.6870995.120256e-07
2.066561.6869475.426442e-07
2.076551.6867945.734109e-07
2.08661.686646.043264e-07
2.096691.6864856.353915e-07
2.106831.6863286.666068e-07
2.117021.686176.979731e-07
2.127261.686017.294911e-07
2.137551.685857.611616e-07
2.147891.6856877.929853e-07
2.158281.6855248.249628e-07
2.168721.6853598.570951e-07
2.179211.6851938.893828e-07
2.189751.6850259.218267e-07
2.21.6848619.533700e-07
2.200341.6848569.570641e-07
2.210991.6846851.071504e-06
2.221681.6845131.186498e-06
2.232431.6843391.302047e-06
2.243231.6841641.418156e-06
2.254081.6839871.534826e-06
2.264981.6838091.652061e-06
2.275931.6836291.769862e-06
2.286941.6834471.888234e-06
2.2981.6832642.007178e-06
2.309121.6830792.126697e-06
2.320291.6828922.246794e-06
2.331511.6827042.367473e-06
2.342791.6825142.488735e-06
2.354121.6823222.610583e-06
2.365511.6821282.733021e-06
2.376951.6819332.856052e-06
2.388451.6817362.979677e-06
2.41.6815373.103900e-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
—