Optical constants

Refractive index of L-LAM72 (OHARA)

L-LAM72: n,k 0.29–2.4 µm

Data
formula 2 + tabulated k
Range
0.29–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.29–2.4 µm
Refractive index n
1.7331
Extinction coefficient k
1.76522e-08
Permittivity ε1
3.00362
Permittivity ε2
6.11860e-08
Absorption coefficient α
0.00377509 cm⁻¹
Penetration depth δ = λ/(2πk)
5.29788e+09 nm
Abbe number Vd
48.897
Chromatic dispersion dn/dλ
-0.0770831 µm⁻¹
Group index ng
1.77839
Group velocity dispersion
138.911 fs²/mm
Dispersion parameter D
-757.833 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

# L-LAM72 (OHARA): L-LAM72
ohara_l_lam72 = ls.fetch_refractiveindex("specs", "OHARA-optical", "L-LAM72", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_l_lam72.range_nm)  # (290, 2400) nm
eps = ohara_l_lam72.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=1.50483297λ2λ2−0.0075034233+0.433346414λ2λ2−0.026900952+1.2714921λ2λ2−95.7631272

Valid from 0.29 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.50483297
C30.0075034233
C40.433346414
C50.026900952
C61.2714921
C795.7631272

Comments and conditions

Low Softening Temperature

Conditions

temperature
298 K

Properties

nd
1.733099
Vd
48.896607
glass code
733489
glass status
special
density
value: 3890
thermal expansion
value: 6.6e-06, temperature range: 243 343; value: 8e-06, temperature range: 293 573
dPgF
-0.0093
resistance
acid: 51.2; climatic: 3.0; phosphate: 1.2

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 429 wavelengths, the same grid as the API and the library
L-LAM72 (OHARA), L-LAM72: n and k versus wavelength
λ (µm)nk
0.291.8133621.062800e-05
0.291541.8120229.919821e-06
0.2930881.8107049.207881e-06
0.2946451.8094098.492160e-06
0.296211.8081347.772639e-06
0.2977831.8068817.049296e-06
0.2993641.8056486.322111e-06
0.31.805166.029700e-06
0.3009541.8044355.810826e-06
0.3025521.8032425.444105e-06
0.3041591.8020685.075437e-06
0.3057741.8009124.704810e-06
0.3073981.7997754.332216e-06
0.3090311.7986563.957642e-06
0.311.7980023.735200e-06
0.3106721.7975543.645367e-06
0.3123221.7964693.424714e-06
0.313981.7954023.202889e-06
0.3156481.794352.979885e-06
0.3173241.7933152.755698e-06
0.3190091.7922962.530320e-06
0.321.7917062.397800e-06
0.3207031.7912922.336250e-06
0.3224061.7903032.187191e-06
0.3241191.7893292.037340e-06
0.325841.7883691.886693e-06
0.327571.7874241.735247e-06
0.329311.7864931.582996e-06
0.331.7861291.522600e-06
0.3310591.7855761.463566e-06
0.3328171.7846721.365538e-06
0.3345841.7837811.266989e-06
0.3363611.7829031.167916e-06
0.3381481.7820381.068318e-06
0.3399431.7811859.681903e-07
0.341.7811599.650300e-07
0.3417491.7803458.989086e-07
0.3435641.7795168.302815e-07
0.3453881.77877.612900e-07
0.3472221.7778956.919320e-07
0.3490661.7771016.222057e-07
0.351.7767055.869000e-07
0.350921.7763195.665958e-07
0.3527841.7755475.254695e-07
0.3546571.7747864.841249e-07
0.3565411.7740364.425607e-07
0.3584341.7732964.007757e-07
0.361.7726953.662200e-07
0.3603381.7725663.610692e-07
0.3622511.7718463.318769e-07
0.3641751.7711373.025294e-07
0.3661091.7704362.730262e-07
0.3680531.7697462.433662e-07
0.371.7690672.136700e-07
0.3700081.7690642.136235e-07
0.3719731.7683922.021165e-07
0.3739481.7677291.905485e-07
0.3759341.7670751.789190e-07
0.3779311.7664291.672277e-07
0.3799381.7657921.554744e-07
0.381.7657731.551100e-07
0.3819551.7651641.457725e-07
0.3839841.7645441.360868e-07
0.3860231.7639311.263496e-07
0.3880731.7633271.165607e-07
0.391.762771.073600e-07
0.3901341.7627311.070448e-07
0.3922061.7621431.021749e-07
0.3942891.7615629.727914e-08
0.3963831.7609899.235735e-08
0.3984881.7604238.740943e-08
0.41.7600238.385500e-08
0.4006041.7598648.325879e-08
0.4027311.7593138.115888e-08
0.404871.7587687.904781e-08
0.407021.7582317.692553e-08
0.4091821.75777.479198e-08
0.4113551.7571767.264709e-08
0.413541.7566597.049082e-08
0.4157361.7561486.832310e-08
0.4179441.7556446.614386e-08
0.421.7551826.411400e-08
0.4201631.7551466.402273e-08
0.4223941.7546546.277374e-08
0.4246381.7541686.151811e-08
0.4268931.7536886.025582e-08
0.429161.7532145.898682e-08
0.4314391.7527465.771108e-08
0.433731.7522845.642857e-08
0.4360331.7518275.513925e-08
0.4383491.7513765.384308e-08
0.441.751065.291900e-08
0.4406771.7509315.249822e-08
0.4430171.7504915.104374e-08
0.445371.7500564.958153e-08
0.4477351.7496264.811155e-08
0.4501131.7492024.663377e-08
0.4525031.7487834.514814e-08
0.4549061.7483684.365462e-08
0.4573221.7479594.215317e-08
0.4597511.7475554.064375e-08
0.461.7475134.048900e-08
0.4621931.7471553.941376e-08
0.4646471.746763.821005e-08
0.4671151.746373.699995e-08
0.4695951.7459843.578342e-08
0.4720891.7456033.456043e-08
0.4745961.7452263.333095e-08
0.4771171.7448543.209494e-08
0.4796511.7444863.085236e-08
0.481.7444363.068100e-08
0.4821981.7441222.950110e-08
0.4847591.7437632.812634e-08
0.4873331.7434072.674428e-08
0.4899211.7430562.535489e-08
0.4925231.7427092.395811e-08
0.4951381.7423652.255392e-08
0.4977681.7420262.114227e-08
0.51.7417421.994400e-08
0.5004111.7416911.988809e-08
0.5030691.7413591.952699e-08
0.5057411.7410311.916397e-08
0.5084261.7407071.879902e-08
0.5111261.7403861.843214e-08
0.5138411.7400691.806330e-08
0.516571.7397561.769251e-08
0.5193131.7394461.731975e-08
0.5220711.7391391.694500e-08
0.5248431.7388361.656827e-08
0.5276311.7385361.618954e-08
0.5304331.738241.580879e-08
0.533251.7379461.542603e-08
0.5360821.7376561.504123e-08
0.5389291.7373691.465439e-08
0.5417911.7370861.426549e-08
0.5446681.7368051.387453e-08
0.547561.7365271.348149e-08
0.551.7362961.315000e-08
0.5504681.7362521.320608e-08
0.5533921.7359811.355612e-08
0.5563311.7357121.390802e-08
0.5592851.7354461.426179e-08
0.5622551.7351831.461744e-08
0.5652411.7349221.497497e-08
0.5682431.7346651.533441e-08
0.5712611.734411.569575e-08
0.5742941.7341571.605902e-08
0.5773441.7339081.642421e-08
0.580411.7336611.679134e-08
0.5834931.7334161.716042e-08
0.5865911.7331741.753146e-08
0.5897071.7329351.790447e-08
0.5928381.7326981.827947e-08
0.5959871.7324631.865645e-08
0.5991521.7322311.903544e-08
0.61.7321691.913700e-08
0.6023341.7320011.921145e-08
0.6055321.7317741.931349e-08
0.6087481.7315481.941607e-08
0.6119811.7313251.951920e-08
0.6152311.7311051.962287e-08
0.6184981.7308861.972710e-08
0.6217831.7306691.983188e-08
0.6250851.7304551.993721e-08
0.6284051.7302432.004311e-08
0.6317421.7300332.014957e-08
0.6350971.7298252.025659e-08
0.638471.7296182.036418e-08
0.641861.7294142.047235e-08
0.6452691.7292122.058108e-08
0.6486961.7290122.069040e-08
0.651.7289362.073200e-08
0.6521411.7288132.056090e-08
0.6556041.7286172.028411e-08
0.6590861.7284222.000586e-08
0.6625861.7282291.972612e-08
0.6661051.7280381.944491e-08
0.6696421.7278491.916219e-08
0.6731981.7276611.887798e-08
0.6767741.7274761.859225e-08
0.6803681.7272911.830501e-08
0.6839811.7271091.801625e-08
0.6876131.7269281.772595e-08
0.6912651.7267491.743410e-08
0.6949361.7265711.714071e-08
0.6986271.7263951.684576e-08
0.71.726331.673600e-08
0.7023371.726221.664274e-08
0.7060671.7260471.649388e-08
0.7098161.7258751.634423e-08
0.7135861.7257051.619379e-08
0.7173751.7255371.604254e-08
0.7211851.7253691.589050e-08
0.7250151.7252031.573764e-08
0.7288651.7250391.558398e-08
0.7327361.7248761.542950e-08
0.7366281.7247141.527419e-08
0.740541.7245541.511807e-08
0.7444721.7243941.496111e-08
0.7484261.7242371.480332e-08
0.7524011.724081.464470e-08
0.7563961.7239241.448523e-08
0.7604131.723771.432491e-08
0.7644511.7236171.416374e-08
0.7685111.7234651.400172e-08
0.7725931.7233151.383883e-08
0.7766951.7231651.367508e-08
0.780821.7230171.351046e-08
0.7849671.7228691.334497e-08
0.7891361.7227231.317860e-08
0.7933261.7225781.301134e-08
0.797541.7224341.284320e-08
0.81.722351.274500e-08
0.8017751.7222911.277328e-08
0.8060331.7221481.284110e-08
0.8103131.7220071.290929e-08
0.8146171.7218671.297785e-08
0.8189431.7217281.304676e-08
0.8232921.7215891.311604e-08
0.8276641.7214521.318569e-08
0.832061.7213161.325571e-08
0.8364781.721181.332610e-08
0.8409211.7210451.339687e-08
0.8453871.7209111.346801e-08
0.8498761.7207781.353953e-08
0.8543891.7206461.361142e-08
0.8589271.7205141.368370e-08
0.8634881.7203841.375637e-08
0.8680741.7202541.382942e-08
0.8726841.7201241.390286e-08
0.8773191.7199961.397668e-08
0.8819781.7198681.405090e-08
0.8866621.7197411.412552e-08
0.891371.7196151.420053e-08
0.8961041.7194891.427594e-08
0.91.7193861.433800e-08
0.9008631.7193641.435175e-08
0.9056471.7192391.442796e-08
0.9104571.7191161.450458e-08
0.9152921.7189921.458160e-08
0.9201531.718871.465903e-08
0.9250391.7187481.473688e-08
0.9299521.7186261.481513e-08
0.934891.7185051.489380e-08
0.9398551.7183851.497290e-08
0.9448471.7182651.505241e-08
0.9498641.7181451.513234e-08
0.9549091.7180261.521270e-08
0.959981.7179081.529348e-08
0.9650781.717791.537469e-08
0.9702031.7176721.545634e-08
0.9753561.7175551.553842e-08
0.9805351.7174381.562093e-08
0.9857431.7173221.570388e-08
0.9909781.7172061.578727e-08
0.996241.7170911.587111e-08
11.7170091.593100e-08
1.001531.7169751.595540e-08
1.006851.716861.604015e-08
1.01221.7167461.612536e-08
1.017571.7166321.621101e-08
1.022981.7165181.629713e-08
1.028411.7164041.638370e-08
1.033871.7162911.647073e-08
1.039361.7161771.655822e-08
1.044881.7160641.664617e-08
1.050431.7159521.673460e-08
1.056011.7158391.682349e-08
1.061621.7157271.691285e-08
1.067251.7156151.700269e-08
1.072921.7155031.709301e-08
1.078621.7153911.718381e-08
1.084351.715281.727508e-08
1.090111.7151681.736685e-08
1.09591.7150571.745910e-08
1.101721.7149461.755184e-08
1.107571.7148351.764507e-08
1.113451.7147241.773880e-08
1.119361.7146131.783303e-08
1.125311.7145021.792775e-08
1.131281.7143911.802298e-08
1.137291.714281.811872e-08
1.143331.7141691.821496e-08
1.14941.7140581.831171e-08
1.155511.7139471.840898e-08
1.161641.7138371.850677e-08
1.167811.7137261.860507e-08
1.174011.7136151.870390e-08
1.180251.7135041.880325e-08
1.186521.7133921.890313e-08
1.192821.7132811.900354e-08
1.199151.713171.910448e-08
1.21.7131551.911800e-08
1.205521.7130581.951418e-08
1.211921.7129471.997369e-08
1.218361.7128352.043564e-08
1.224831.7127232.090005e-08
1.231331.7126112.136692e-08
1.237871.7124992.183627e-08
1.244451.7123862.230811e-08
1.251051.7122732.278246e-08
1.25771.7121612.325932e-08
1.264381.7120472.373872e-08
1.271091.7119342.422067e-08
1.277841.711822.470517e-08
1.284631.7117062.519225e-08
1.291451.7115922.568192e-08
1.298311.7114772.617418e-08
1.30521.7113622.666906e-08
1.312141.7112472.716657e-08
1.31911.7111312.766672e-08
1.326111.7110152.816952e-08
1.333151.7108992.867500e-08
1.340231.7107822.918316e-08
1.347351.7106652.969402e-08
1.35451.7105473.020759e-08
1.36171.7104293.072389e-08
1.368931.7103113.124293e-08
1.37621.7101913.176473e-08
1.383511.7100723.228930e-08
1.390861.7099523.281665e-08
1.398241.7098313.334681e-08
1.41.7098033.347300e-08
1.405671.709713.397057e-08
1.413131.7095893.462596e-08
1.420641.7094663.528483e-08
1.428181.7093443.594720e-08
1.435771.709223.661309e-08
1.443391.7090963.728251e-08
1.451061.7089723.795549e-08
1.458761.7088463.863205e-08
1.466511.7087213.931219e-08
1.47431.7085943.999595e-08
1.482131.7084674.068334e-08
1.491.7083394.137438e-08
1.497911.708214.206909e-08
1.505871.7080814.276749e-08
1.513861.707954.346959e-08
1.52191.7078194.417543e-08
1.529981.7076884.488502e-08
1.538111.7075554.559837e-08
1.546281.7074224.631551e-08
1.554491.7072874.703646e-08
1.562751.7071524.776124e-08
1.571041.7070164.848987e-08
1.579391.706884.922237e-08
1.587781.7067424.995875e-08
1.596211.7066035.069905e-08
1.61.7065415.103200e-08
1.604681.7064645.286994e-08
1.613211.7063235.621343e-08
1.621771.7061815.957467e-08
1.630391.7060396.295377e-08
1.639041.7058956.635081e-08
1.647751.7057516.976589e-08
1.65651.7056057.319911e-08
1.66531.7054587.665056e-08
1.674141.705318.012034e-08
1.683031.7051618.360855e-08
1.691971.7050118.711528e-08
1.700951.704869.064064e-08
1.709991.7047089.418471e-08
1.719071.7045549.774761e-08
1.72821.7043991.013294e-07
1.737381.7042431.049303e-07
1.74661.7040861.085502e-07
1.755881.7039271.121894e-07
1.76521.7037671.158479e-07
1.774581.7036061.195259e-07
1.7841.7034431.232234e-07
1.793481.7032791.269405e-07
1.81.7031661.295000e-07
1.8031.7031141.336028e-07
1.812581.7029471.466944e-07
1.82221.7027791.598555e-07
1.831881.702611.730865e-07
1.841611.7024381.863877e-07
1.851391.7022661.997596e-07
1.861221.7020922.132025e-07
1.87111.7019162.267168e-07
1.881041.7017392.403029e-07
1.891031.701562.539611e-07
1.901071.7013792.676918e-07
1.911171.7011972.814955e-07
1.921321.7010142.953725e-07
1.931521.7008283.093231e-07
1.941781.7006413.233479e-07
1.952091.7004523.374471e-07
1.962461.7002613.516212e-07
1.972881.7000693.658706e-07
1.983361.6998743.801957e-07
1.993891.6996783.945968e-07
21.6995644.029500e-07
2.004481.699484.215383e-07
2.015121.699284.657127e-07
2.025831.6990785.101218e-07
2.036581.6988745.547667e-07
2.04741.6986685.996487e-07
2.058271.698466.447690e-07
2.06921.698256.901290e-07
2.080191.6980377.357299e-07
2.091241.6978237.815729e-07
2.102351.6976078.276594e-07
2.113511.6973888.739906e-07
2.124731.6971679.205679e-07
2.136021.6969449.673925e-07
2.147361.6967181.014466e-06
2.158771.6964911.061789e-06
2.170231.696261.109364e-06
2.181761.6960281.157191e-06
2.193341.6957931.205272e-06
2.21.6956571.232900e-06
2.204991.6955561.345628e-06
2.21671.6953161.610144e-06
2.228471.6950731.876064e-06
2.240311.6948282.143397e-06
2.25221.6945812.412149e-06
2.264171.694332.682329e-06
2.276191.6940772.953943e-06
2.288281.6938223.227000e-06
2.300431.6935633.501507e-06
2.312651.6933023.777472e-06
2.324931.6930384.054902e-06
2.337281.6927714.333806e-06
2.349691.6925014.614191e-06
2.362171.6922284.896065e-06
2.374711.6919525.179436e-06
2.387321.6916735.464311e-06
2.41.6913915.750700e-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
—