Optical constants

Refractive index of S-LAM58 (OHARA)

S-LAM58: 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
41.978
Chromatic dispersion dn/dλ
-0.0873889 µm⁻¹
Group index ng
1.77135
Group velocity dispersion
165.867 fs²/mm
Dispersion parameter D
-904.894 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-LAM58 (OHARA): S-LAM58
ohara_s_lam58 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-LAM58", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_lam58.range_nm)  # (350, 2400) nm
eps = ohara_s_lam58.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=1.70984856λ2λ2−0.0100852127+0.173342897λ2λ2−0.0470890831+1.64833565λ2λ2−157.46852

Valid from 0.35 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.70984856
C30.0100852127
C40.173342897
C50.0470890831
C61.64833565
C7157.46852

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 2.9e-06 1.29e-08 -3.62e-11 6.72e-07 7.76e-10 0.243
nd
1.720000
Vd
41.978463
glass code
720420
density
value: 4000
thermal expansion
value: 6.6e-06, temperature range: 243 343; value: 7.7e-06, temperature range: 293 573
dPgF
-0.0006
resistance
acid: 3.2; climatic: 1.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 2.76e-06 K⁻¹ at 633 nm, dn/dT = 1.83e-06 K⁻¹ at 1310 nm, dn/dT = 1.76e-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 423 wavelengths, the same grid as the API and the library
S-LAM58 (OHARA), S-LAM58: n and k versus wavelength
λ (µm)nk
0.351.7730058.965200e-06
0.3516931.7720768.082471e-06
0.3533941.7711617.195472e-06
0.3551031.770266.304183e-06
0.3568211.7693745.408583e-06
0.3585471.7685014.508651e-06
0.361.767783.751000e-06
0.3602811.7676423.695017e-06
0.3620241.7667953.348105e-06
0.3637751.7659622.999516e-06
0.3655351.7651412.649240e-06
0.3673031.7643322.297269e-06
0.3690791.7635351.943597e-06
0.371.7631291.760300e-06
0.3708641.762751.686841e-06
0.3726581.7619771.534402e-06
0.3744611.7612151.381227e-06
0.3762721.7604631.227311e-06
0.3780921.7597231.072650e-06
0.3799211.7589939.172412e-07
0.381.7589629.105200e-07
0.3817591.7582738.390976e-07
0.3836051.7575647.641019e-07
0.3854611.7568646.887435e-07
0.3873251.7561756.130206e-07
0.3891991.7554955.369314e-07
0.391.7552085.043800e-07
0.3910811.7548244.819287e-07
0.3929731.7541624.426431e-07
0.3948731.753514.031675e-07
0.3967831.7528663.635010e-07
0.3987031.7522313.236426e-07
0.41.7518092.967000e-07
0.4006311.7516052.916423e-07
0.4025691.7509872.761144e-07
0.4045161.7503772.605114e-07
0.4064731.7497752.448330e-07
0.4084391.7491822.290787e-07
0.4104151.7485962.132482e-07
0.41241.7480171.973412e-07
0.4143941.7474461.813572e-07
0.4163991.7468831.652959e-07
0.4184131.7463271.491569e-07
0.421.7458951.364400e-07
0.4204371.7457781.353178e-07
0.422471.7452361.300933e-07
0.4245141.74471.248435e-07
0.4265671.7441721.195684e-07
0.4286311.743651.142677e-07
0.4307041.7431351.089414e-07
0.4327871.7426261.035893e-07
0.434881.7421249.821132e-08
0.4369841.7416289.280733e-08
0.4390981.7411388.737721e-08
0.441.7409318.505900e-08
0.4412221.7406548.369736e-08
0.4433561.7401768.131840e-08
0.44551.7397047.892794e-08
0.4476551.7392377.652591e-08
0.449821.7387767.411227e-08
0.4519961.7383217.168695e-08
0.4541821.7378716.924990e-08
0.4563791.7374276.680106e-08
0.4585871.7369886.434038e-08
0.461.7367116.276500e-08
0.4608051.7365546.209489e-08
0.4630341.7361256.023923e-08
0.4652731.7357025.837459e-08
0.4675241.7352835.650094e-08
0.4697851.7348695.461821e-08
0.4720581.734465.272639e-08
0.4743411.7340565.082541e-08
0.4766351.7336574.891524e-08
0.4789411.7332624.699582e-08
0.481.7330834.611400e-08
0.4812571.7328724.547636e-08
0.4835851.7324864.429592e-08
0.4859241.7321044.310978e-08
0.4882751.7317274.191789e-08
0.4906361.7313554.072024e-08
0.493011.7309863.951680e-08
0.4953941.7306223.830754e-08
0.4977911.7302623.709243e-08
0.51.7299353.597200e-08
0.5001981.7299063.589890e-08
0.5026181.7295533.500710e-08
0.5050491.7292053.411098e-08
0.5074921.7288613.321053e-08
0.5099461.728523.230572e-08
0.5124131.7281843.139654e-08
0.5148921.727853.048296e-08
0.5173821.7275212.956496e-08
0.5198851.7271952.864252e-08
0.5223991.7268732.771561e-08
0.5249261.7265542.678423e-08
0.5274651.7262392.584834e-08
0.5300161.7259272.490792e-08
0.532581.7256192.396295e-08
0.5351561.7253142.301342e-08
0.5377451.7250122.205929e-08
0.5403461.7247132.110054e-08
0.5429591.7244182.013716e-08
0.5455861.7241251.916912e-08
0.5482251.7238361.819639e-08
0.551.7236441.754200e-08
0.5508761.723551.756996e-08
0.5535411.7232671.765496e-08
0.5562181.7229871.774037e-08
0.5589091.7227091.782619e-08
0.5616121.7224351.791243e-08
0.5643291.7221641.799909e-08
0.5670581.7218951.808616e-08
0.5698011.7216291.817366e-08
0.5725571.7213661.826158e-08
0.5753271.7211051.834992e-08
0.578111.7208481.843869e-08
0.5809061.7205931.852790e-08
0.5837161.720341.861753e-08
0.5865391.720091.870760e-08
0.5893761.7198431.879810e-08
0.5922271.7195981.888904e-08
0.5950911.7193551.898042e-08
0.597971.7191151.907224e-08
0.61.7189481.913700e-08
0.6008621.7188771.925411e-08
0.6037691.7186421.964885e-08
0.6066891.7184092.004550e-08
0.6096231.7181782.044406e-08
0.6125721.717952.084456e-08
0.6155351.7177242.124699e-08
0.6185131.71752.165137e-08
0.6215041.7172782.205770e-08
0.624511.7170582.246600e-08
0.6275311.7168412.287628e-08
0.6305661.7166262.328854e-08
0.6336161.7164122.370279e-08
0.6366811.7162012.411905e-08
0.6397611.7159922.453732e-08
0.6428551.7157842.495761e-08
0.6459651.7155792.537994e-08
0.6490891.7153762.580431e-08
0.651.7153172.592800e-08
0.6522291.7151742.551823e-08
0.6553841.7149752.493826e-08
0.6585541.7147772.435547e-08
0.6617391.7145812.376987e-08
0.664941.7143872.318143e-08
0.6681561.7141952.259015e-08
0.6713881.7140042.199601e-08
0.6746361.7138162.139900e-08
0.6778991.7136292.079909e-08
0.6811781.7134432.019629e-08
0.6844731.713261.959057e-08
0.6877831.7130781.898192e-08
0.691111.7128971.837033e-08
0.6944531.7127191.775577e-08
0.6978121.7125411.713825e-08
0.71.7124271.673600e-08
0.7011871.7123661.668862e-08
0.7045791.7121921.655326e-08
0.7079871.7120191.641724e-08
0.7114111.7118481.628057e-08
0.7148521.7116791.614324e-08
0.718311.7115111.600524e-08
0.7217851.7113441.586658e-08
0.7252761.7111791.572724e-08
0.7287841.7110151.558723e-08
0.7323091.7108531.544655e-08
0.7358511.7106911.530518e-08
0.739411.7105321.516313e-08
0.7429871.7103731.502039e-08
0.7465811.7102161.487696e-08
0.7501921.7100611.473284e-08
0.7538211.7099061.458802e-08
0.7574671.7097531.444250e-08
0.7611311.7096011.429628e-08
0.7648121.709451.414935e-08
0.7685111.7093011.400171e-08
0.7722291.7091521.385335e-08
0.7759641.7090051.370428e-08
0.7797171.7088591.355448e-08
0.7834891.7087141.340397e-08
0.7872781.708571.325272e-08
0.7910861.7084281.310074e-08
0.7949131.7082861.294803e-08
0.7987581.7081451.279457e-08
0.81.70811.274500e-08
0.8026211.7080061.278676e-08
0.8065041.7078681.284860e-08
0.8104051.707731.291075e-08
0.8143251.7075941.297319e-08
0.8182631.7074591.303594e-08
0.8222211.7073241.309898e-08
0.8261981.7071911.316234e-08
0.8301951.7070581.322600e-08
0.834211.7069271.328997e-08
0.8382451.7067961.335425e-08
0.84231.7066671.341884e-08
0.8463741.7065381.348374e-08
0.8504681.706411.354895e-08
0.8545811.7062831.361448e-08
0.8587151.7061571.368033e-08
0.8628691.7060311.374650e-08
0.8670421.7059071.381298e-08
0.8712361.7057831.387979e-08
0.875451.705661.394692e-08
0.8796851.7055381.401438e-08
0.883941.7054171.408216e-08
0.8882151.7052961.415027e-08
0.8925121.7051771.421871e-08
0.8968291.7050571.428748e-08
0.91.7049711.433800e-08
0.9011671.7049391.435658e-08
0.9055251.7048221.442602e-08
0.9099051.7047051.449579e-08
0.9143071.7045881.456590e-08
0.9187291.7044731.463635e-08
0.9231731.7043581.470714e-08
0.9276381.7042441.477828e-08
0.9321251.704131.484975e-08
0.9366341.7040171.492158e-08
0.9411641.7039051.499375e-08
0.9457171.7037931.506627e-08
0.9502911.7036821.513914e-08
0.9548881.7035711.521236e-08
0.9595061.7034611.528593e-08
0.9641471.7033521.535987e-08
0.9688111.7032431.543416e-08
0.9734971.7031341.550881e-08
0.9782061.7030261.558382e-08
0.9829371.7029191.565919e-08
0.9876921.7028121.573493e-08
0.9924691.7027061.581103e-08
0.997271.70261.588751e-08
11.702541.593100e-08
1.002091.7024941.586425e-08
1.006941.7023891.570971e-08
1.011811.7022851.555441e-08
1.016711.7021811.539837e-08
1.021621.7020771.524157e-08
1.026561.7019741.508401e-08
1.031531.7018711.492569e-08
1.036521.7017691.476660e-08
1.041531.7016671.460675e-08
1.046571.7015651.444612e-08
1.051631.7014631.428471e-08
1.056721.7013621.412252e-08
1.061831.7012621.395955e-08
1.066971.7011611.379579e-08
1.072131.7010611.363124e-08
1.077311.7009621.346589e-08
1.082521.7008621.329975e-08
1.087761.7007631.313280e-08
1.093021.7006641.296504e-08
1.098311.7005661.279647e-08
1.103621.7004681.262708e-08
1.108961.700371.245688e-08
1.114321.7002721.228585e-08
1.119711.7001741.211399e-08
1.125131.7000771.194131e-08
1.130571.699981.176779e-08
1.136041.6998831.159343e-08
1.141541.6997861.141822e-08
1.147061.6996891.124217e-08
1.152611.6995931.106527e-08
1.158181.6994971.088751e-08
1.163781.6994011.070889e-08
1.169411.6993051.052941e-08
1.175071.6992091.034905e-08
1.180751.6991131.016783e-08
1.186461.6990189.985731e-09
1.19221.6989229.802750e-09
1.197971.6988279.618884e-09
1.21.6987939.554100e-09
1.203761.6987311.000410e-08
1.209591.6986361.070044e-08
1.215441.6985411.140015e-08
1.221311.6984461.210325e-08
1.227221.6983511.280974e-08
1.233161.6982561.351966e-08
1.239121.6981611.423301e-08
1.245121.6980661.494981e-08
1.251141.6979711.567007e-08
1.257191.6978761.639382e-08
1.263271.6977811.712107e-08
1.269381.6976861.785184e-08
1.275521.6975911.858614e-08
1.281691.6974961.932400e-08
1.287891.6974012.006542e-08
1.294121.6973062.081043e-08
1.300381.697212.155905e-08
1.306671.6971152.231128e-08
1.312991.697022.306715e-08
1.319341.6969242.382668e-08
1.325721.6968282.458989e-08
1.332141.6967332.535678e-08
1.338581.6966372.612739e-08
1.345051.6965412.690172e-08
1.351561.6964452.767979e-08
1.35811.6963482.846163e-08
1.364671.6962522.924726e-08
1.371271.6961553.003668e-08
1.37791.6960593.082992e-08
1.384561.6959613.162700e-08
1.391261.6958643.242793e-08
1.397991.6957673.323274e-08
1.41.6957383.347300e-08
1.404751.6956693.358664e-08
1.411551.6955713.374911e-08
1.418381.6954733.391235e-08
1.425241.6953753.407639e-08
1.432131.6952763.424122e-08
1.439061.6951773.440685e-08
1.446021.6950783.457328e-08
1.453011.6949793.474051e-08
1.460041.6948793.490856e-08
1.46711.6947793.507741e-08
1.47421.6946783.524708e-08
1.481331.6945783.541758e-08
1.488491.6944773.558890e-08
1.495691.6943753.576104e-08
1.502931.6942733.593402e-08
1.51021.6941713.610784e-08
1.51751.6940693.628249e-08
1.524841.6939663.645800e-08
1.532221.6938623.663435e-08
1.539631.6937593.681155e-08
1.547081.6936543.698961e-08
1.554561.693553.716853e-08
1.562081.6934453.734832e-08
1.569641.6933393.752898e-08
1.577231.6932333.771051e-08
1.584861.6931273.789292e-08
1.592521.693023.807621e-08
1.61.6929153.825500e-08
1.600231.6929123.834146e-08
1.607971.6928044.131350e-08
1.615741.6926964.429993e-08
1.623561.6925874.730079e-08
1.631411.6924775.031618e-08
1.63931.6923675.334615e-08
1.647231.6922565.639077e-08
1.65521.6921455.945012e-08
1.663211.6920336.252427e-08
1.671251.6919216.561329e-08
1.679331.6918076.871725e-08
1.687461.6916947.183622e-08
1.695621.6915797.497028e-08
1.703821.6914647.811950e-08
1.712061.6913498.128395e-08
1.720341.6912328.446371e-08
1.728661.6911158.765885e-08
1.737031.6909989.086944e-08
1.745431.6908799.409557e-08
1.753871.690769.733729e-08
1.762351.690641.005947e-07
1.770881.690521.038679e-07
1.779441.6903981.071569e-07
1.788051.6902761.104618e-07
1.79671.6901531.137827e-07
1.81.6901061.150500e-07
1.805391.6900291.188677e-07
1.814121.6899051.250530e-07
1.82291.689781.312682e-07
1.831711.6896531.375135e-07
1.840571.6895261.437889e-07
1.849481.6893981.500948e-07
1.858421.689271.564311e-07
1.867411.689141.627981e-07
1.876441.6890091.691959e-07
1.885521.6888781.756246e-07
1.894641.6887451.820844e-07
1.903811.6886121.885755e-07
1.913011.6884781.950979e-07
1.922271.6883422.016519e-07
1.931571.6882062.082376e-07
1.940911.6880692.148552e-07
1.95031.687932.215048e-07
1.959731.6877912.281865e-07
1.969211.6876512.349006e-07
1.978731.6875092.416471e-07
1.98831.6873672.484263e-07
1.997921.6872232.552382e-07
21.6871922.567100e-07
2.007591.6870782.768530e-07
2.01731.6869323.026376e-07
2.027051.6867853.285468e-07
2.036861.6866373.545814e-07
2.046711.6864883.807419e-07
2.056611.6863374.070290e-07
2.066561.6861854.334432e-07
2.076551.6860324.599851e-07
2.08661.6858784.866555e-07
2.096691.6857235.134548e-07
2.106831.6855665.403838e-07
2.117021.6854085.674430e-07
2.127261.6852495.946331e-07
2.137551.6850886.219548e-07
2.147891.6849266.494086e-07
2.158281.6847636.769951e-07
2.168721.6845987.047151e-07
2.179211.6844327.325692e-07
2.189751.6842647.605580e-07
2.21.68417.877700e-07
2.200341.6840957.902399e-07
2.210991.6839258.667537e-07
2.221681.6837539.436376e-07
2.232431.6835791.020893e-06
2.243231.6834041.098523e-06
2.254081.6832281.176528e-06
2.264981.683051.254910e-06
2.275931.682871.333671e-06
2.286941.6826891.412814e-06
2.2981.6825061.492339e-06
2.309121.6823221.572249e-06
2.320291.6821351.652545e-06
2.331511.6819481.733230e-06
2.342791.6817581.814305e-06
2.354121.6815671.895772e-06
2.365511.6813741.977633e-06
2.376951.6811792.059890e-06
2.388451.6809832.142545e-06
2.41.6807842.225600e-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
—