Optical constants

Refractive index of H-LAF50B (CDGM)

H-LAF50B: n,k 0.302–2.325 µm

Data
formula 2 + tabulated k
Range
0.302–2.325 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.302–2.325 µm
Refractive index n
1.7725
Extinction coefficient k
1.87414e-08
Permittivity ε1
3.14175
Permittivity ε2
6.64383e-08
Absorption coefficient α
0.00400803 cm⁻¹
Penetration depth δ = λ/(2πk)
4.98998e+09 nm
Abbe number Vd
49.599
Chromatic dispersion dn/dλ
-0.0801351 µm⁻¹
Group index ng
1.81958
Group velocity dispersion
143.84 fs²/mm
Dispersion parameter D
-784.723 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

# H-LAF50B (CDGM): H-LAF50B
cdgm_h_laf50b = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-LAF50B", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_laf50b.range_nm)  # (302, 2325) nm
eps = cdgm_h_laf50b.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=1.17461263λ2λ2−82.6267633+1.65889744λ2λ2−0.0080512806+0.413174064λ2λ2−0.026961264

Valid from 0.302 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.17461263
C382.6267633
C41.65889744
C50.0080512806
C60.413174064
C70.026961264

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 2.17e-06 1.36e-08 -3.28e-11 5.95e-07 8.86e-10 0.161
nd
1.772500
Vd
49.598996
glass code
773496
glass status
standard
density
value: 4240
thermal expansion
value: 5.8e-06, temperature range: 243 343; value: 7.5e-06, temperature range: 293 573
dPgF
-0.0096
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 2.26e-06 K⁻¹ at 633 nm, dn/dT = 1.49e-06 K⁻¹ at 1310 nm, dn/dT = 1.42e-06 K⁻¹ at 1550 nm

References

Cite

CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com); See also CDGM optical 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 431 wavelengths, the same grid as the API and the library
H-LAF50B (CDGM), H-LAF50B: n and k versus wavelength
λ (µm)nk
0.3021.8452099.087900e-06
0.3035491.8440448.361430e-06
0.3051061.8428967.631234e-06
0.306671.8417656.897293e-06
0.3082431.8406526.159589e-06
0.3098241.8395555.418101e-06
0.311.8394345.335500e-06
0.3114131.8384745.003046e-06
0.313011.8374094.627236e-06
0.3146151.836364.249498e-06
0.3162291.8353263.869823e-06
0.317851.8343073.488202e-06
0.3194811.8333033.104622e-06
0.321.8329872.982400e-06
0.3211191.8323132.852937e-06
0.3227661.8313382.662411e-06
0.3244211.8303762.470909e-06
0.3260851.8294292.278424e-06
0.3277571.8284942.084952e-06
0.3294381.8275731.890487e-06
0.331.8272691.825500e-06
0.3311281.8266641.749193e-06
0.3328261.8257691.634294e-06
0.3345331.8248851.518805e-06
0.3362491.8240141.402723e-06
0.3379731.8231551.286047e-06
0.3397061.8223081.168772e-06
0.341.8221661.148900e-06
0.3414481.8214721.086358e-06
0.34321.8206481.010750e-06
0.344961.8198359.347541e-07
0.3467291.8190338.583684e-07
0.3485071.8182417.815908e-07
0.351.8175887.171300e-07
0.3502941.8174617.090334e-07
0.3520911.816696.596227e-07
0.3538971.815936.099586e-07
0.3557121.815185.600399e-07
0.3575361.814445.098651e-07
0.3593691.813714.594330e-07
0.361.8134624.420900e-07
0.3612121.8129894.217642e-07
0.3630651.8122783.907091e-07
0.3649271.8115753.594948e-07
0.3667981.8108823.281204e-07
0.368681.8101982.965852e-07
0.371.8097262.744500e-07
0.370571.8095232.689184e-07
0.3724711.8088572.504876e-07
0.3743811.8081992.319623e-07
0.3763011.8075492.133419e-07
0.3782311.8069081.946261e-07
0.381.806331.774700e-07
0.3801711.8062741.765479e-07
0.382121.8056491.660175e-07
0.384081.8050321.554331e-07
0.386051.8044221.447944e-07
0.388031.803821.341012e-07
0.391.8032321.234600e-07
0.390021.8032261.233881e-07
0.392021.8026391.161203e-07
0.394031.8020591.088152e-07
0.3960511.8014861.014727e-07
0.3980821.8009219.409246e-08
0.41.8003968.712500e-08
0.4001241.8003628.696121e-08
0.4021761.799818.425087e-08
0.4042391.7992658.152663e-08
0.4063121.7987277.878842e-08
0.4083961.7981957.603617e-08
0.410491.797677.326980e-08
0.4125951.7971517.048925e-08
0.4147111.7966386.769444e-08
0.4168381.7961316.488529e-08
0.4189761.7956316.206174e-08
0.421.7953946.070900e-08
0.4211251.7951365.987166e-08
0.4232841.7946475.826352e-08
0.4254551.7941645.664713e-08
0.4276371.7936875.502244e-08
0.429831.7932165.338943e-08
0.4320351.792755.174804e-08
0.434251.7922895.009823e-08
0.4364771.7918344.843996e-08
0.4387161.7913844.677319e-08
0.441.7911294.581700e-08
0.4409661.790944.484623e-08
0.4432271.79054.257309e-08
0.44551.7900664.028828e-08
0.4477851.7896363.799176e-08
0.4500821.7892123.568346e-08
0.452391.7887933.336332e-08
0.454711.7883783.103129e-08
0.4570421.7879682.868729e-08
0.4593861.7875632.633127e-08
0.461.7874582.571400e-08
0.4617421.7871622.547650e-08
0.464111.7867662.515361e-08
0.466491.7863742.482907e-08
0.4688831.7859872.450287e-08
0.4712871.7856042.417499e-08
0.4737041.7852262.384544e-08
0.4761341.7848512.351419e-08
0.4785751.7844812.318124e-08
0.481.7842682.298700e-08
0.481031.7841152.262450e-08
0.4834971.7837532.175613e-08
0.4859761.7833952.088330e-08
0.4884691.7830412.000600e-08
0.4909741.7826911.912420e-08
0.4934921.7823451.823788e-08
0.4960231.7820031.734701e-08
0.4985671.7816641.645157e-08
0.51.7814751.594700e-08
0.5011231.7813291.598284e-08
0.5036931.7809971.606482e-08
0.5062771.780671.614723e-08
0.5088731.7803451.623005e-08
0.5114831.7800251.631330e-08
0.5141061.7797071.639698e-08
0.5167431.7793931.648109e-08
0.5193931.7790831.656563e-08
0.5220561.7787761.665060e-08
0.5247341.7784721.673601e-08
0.5274251.7781711.682186e-08
0.530131.7778731.690814e-08
0.5328491.7775791.699487e-08
0.5355811.7772871.708205e-08
0.5383281.7769991.716967e-08
0.5410891.7767141.725774e-08
0.5438641.7764311.734626e-08
0.5466531.7761521.743524e-08
0.5494571.7758751.752467e-08
0.551.7758221.754200e-08
0.5522751.7756021.761456e-08
0.5551071.7753311.770491e-08
0.5579541.7750631.779573e-08
0.5608151.7747971.788701e-08
0.5636911.7745341.797876e-08
0.5665821.7742741.807098e-08
0.5694881.7740171.816367e-08
0.5724091.7737621.825684e-08
0.5753441.773511.835048e-08
0.5782951.773261.844461e-08
0.5812611.7730131.853922e-08
0.5842421.7727681.863431e-08
0.5872381.7725261.872989e-08
0.590251.7722861.882596e-08
0.5932771.7720481.892253e-08
0.5963191.7718131.901959e-08
0.5993781.771581.911715e-08
0.61.7715331.913700e-08
0.6024521.7713491.972498e-08
0.6055411.7711212.046601e-08
0.6086471.7708952.121084e-08
0.6117681.770672.195949e-08
0.6149061.7704482.271198e-08
0.6180591.7702292.346833e-08
0.6212291.7700112.422856e-08
0.6244151.7697952.499268e-08
0.6276171.7695812.576073e-08
0.6308361.769372.653271e-08
0.6340711.769162.730865e-08
0.6373231.7689522.808858e-08
0.6405921.7687462.887250e-08
0.6438771.7685422.966044e-08
0.6471791.768343.045242e-08
0.651.768173.112900e-08
0.6504981.768143.115285e-08
0.6538341.7679413.131258e-08
0.6571871.7677453.147313e-08
0.6605581.767553.163451e-08
0.6639451.7673573.179671e-08
0.6673511.7671653.195974e-08
0.6707731.7669753.212361e-08
0.6742131.7667873.228832e-08
0.6776711.7666013.245388e-08
0.6811461.7664163.262028e-08
0.684641.7662333.278754e-08
0.6881511.7660513.295566e-08
0.691681.7658713.312464e-08
0.6952271.7656933.329448e-08
0.6987931.7655153.346519e-08
0.71.7654563.352300e-08
0.7023761.765343.363681e-08
0.7059791.7651663.380932e-08
0.7095991.7649933.398271e-08
0.7132381.7648223.415699e-08
0.7168961.7646523.433216e-08
0.7205731.7644833.450824e-08
0.7242681.7643163.468521e-08
0.7279831.764153.486310e-08
0.7317161.7639863.504189e-08
0.7354691.7638233.522160e-08
0.7392411.7636613.540224e-08
0.7430321.76353.558380e-08
0.7468431.7633413.576629e-08
0.7506731.7631833.594972e-08
0.7545231.7630263.613409e-08
0.7583921.762873.631940e-08
0.7622821.7627153.650567e-08
0.7661911.7625623.669289e-08
0.770121.7624093.688107e-08
0.774071.7622583.707021e-08
0.778041.7621083.726033e-08
0.782031.7619593.745142e-08
0.7860411.7618113.764349e-08
0.7900721.7616643.783654e-08
0.7941241.7615173.803059e-08
0.7981961.7613723.822563e-08
0.81.7613093.831200e-08
0.802291.7612283.717751e-08
0.8064051.7610853.513916e-08
0.810541.7609433.309036e-08
0.8146971.7608023.103104e-08
0.8188751.7606622.896117e-08
0.8230751.7605222.688068e-08
0.8272961.7603842.478952e-08
0.8315391.7602462.268764e-08
0.8358031.7601092.057498e-08
0.840091.7599731.845148e-08
0.8443981.7598381.631709e-08
0.8487291.7597041.417176e-08
0.851.7596651.354200e-08
0.8530821.759571.359106e-08
0.8574571.7594381.366071e-08
0.8618541.7593061.373072e-08
0.8662741.7591741.380108e-08
0.8707171.7590441.387181e-08
0.8751821.7589141.394290e-08
0.8796711.7587851.401436e-08
0.8841821.7586561.408618e-08
0.8887171.7585291.415837e-08
0.8932741.7584011.423093e-08
0.8978561.7582751.430386e-08
0.91.7582161.433800e-08
0.902461.7581491.437722e-08
0.9070881.7580241.445099e-08
0.9117411.7578991.452514e-08
0.9164161.7577751.459968e-08
0.9211161.7576511.467459e-08
0.925841.7575281.474989e-08
0.9305881.7574061.482558e-08
0.9353611.7572841.490165e-08
0.9401581.7571621.497812e-08
0.944981.7570411.505497e-08
0.9498261.7569211.513222e-08
0.951.7569171.513500e-08
0.9546971.7568011.520978e-08
0.9595931.7566811.528772e-08
0.9645151.7565621.536607e-08
0.9694611.7564431.544482e-08
0.9744331.7563251.552397e-08
0.979431.7562071.560353e-08
0.9844531.756091.568350e-08
0.9895021.7559721.576387e-08
0.9945771.7558561.584466e-08
0.9996781.7557391.592587e-08
11.7557321.593100e-08
1.00481.7556231.600755e-08
1.009961.7555071.608966e-08
1.015141.7553921.617219e-08
1.020341.7552771.625514e-08
1.025581.7551621.633851e-08
1.030841.7550471.642232e-08
1.036121.7549331.650655e-08
1.041441.7548181.659122e-08
1.046781.7547041.667632e-08
1.052151.7545911.676185e-08
1.057541.7544771.684783e-08
1.061.7544261.688700e-08
1.062971.7543641.693425e-08
1.068421.7542511.702113e-08
1.07391.7541371.710844e-08
1.07941.7540251.719621e-08
1.084941.7539121.728443e-08
1.09051.7537991.737309e-08
1.09611.7536871.746222e-08
1.101721.7535741.755180e-08
1.107371.7534621.764184e-08
1.113051.753351.773234e-08
1.118761.7532371.782330e-08
1.124491.7531251.791474e-08
1.130261.7530131.800664e-08
1.136061.7529011.809901e-08
1.141881.7527891.819185e-08
1.147741.7526771.828518e-08
1.153621.7525651.837898e-08
1.159541.7524531.847326e-08
1.165491.752341.856802e-08
1.171471.7522281.866328e-08
1.177471.7521161.875902e-08
1.183511.7520031.885525e-08
1.189581.7518911.895197e-08
1.195681.7517781.904919e-08
1.21.7516991.911800e-08
1.201811.7516651.934963e-08
1.207981.7515532.013655e-08
1.214171.7514392.092752e-08
1.22041.7513262.172254e-08
1.226661.7512132.252164e-08
1.232951.7510992.332483e-08
1.239271.7509862.413215e-08
1.245631.7508722.494360e-08
1.252021.7507572.575922e-08
1.258441.7506432.657902e-08
1.264891.7505282.740302e-08
1.271381.7504132.823125e-08
1.27791.7502982.906373e-08
1.284451.7501832.990047e-08
1.291041.7500673.074151e-08
1.297661.7499513.158686e-08
1.304321.7498343.243655e-08
1.311011.7497173.329059e-08
1.317731.74963.414902e-08
1.324491.7494833.501184e-08
1.331281.7493653.587910e-08
1.338111.7492473.675080e-08
1.344971.7491283.762697e-08
1.351871.7490093.850763e-08
1.35881.7488893.939281e-08
1.365771.7487694.028253e-08
1.372771.7486484.117681e-08
1.379811.7485274.207568e-08
1.386891.7484064.297916e-08
1.3941.7482844.388727e-08
1.41.7481814.465300e-08
1.401151.7481614.476338e-08
1.408341.7480384.545211e-08
1.415561.7479144.614437e-08
1.422821.747794.684017e-08
1.430121.7476654.753955e-08
1.437451.747544.824251e-08
1.444821.7474144.894908e-08
1.452231.7472874.965927e-08
1.459681.747165.037311e-08
1.467171.7470325.109060e-08
1.474691.7469035.181178e-08
1.482251.7467745.253665e-08
1.489861.7466445.326524e-08
1.49751.7465135.399757e-08
1.505181.7463825.473365e-08
1.51291.7462495.547351e-08
1.520651.7461165.621716e-08
1.528451.7459835.696463e-08
1.536291.7458485.771593e-08
1.544171.7457135.847108e-08
1.552091.7455765.923011e-08
1.560051.7454395.999303e-08
1.568051.7453016.075986e-08
1.576091.7451626.153062e-08
1.584181.7450236.230534e-08
1.59231.7448826.308403e-08
1.61.7447486.382200e-08
1.600471.744746.411033e-08
1.608671.7445986.918321e-08
1.616921.7444547.428211e-08
1.625221.744317.940716e-08
1.633551.7441648.455849e-08
1.641931.7440178.973624e-08
1.650351.743879.494055e-08
1.658811.7437211.001715e-07
1.667321.7435711.054294e-07
1.675871.743421.107142e-07
1.684471.7432681.160260e-07
1.693111.7431151.213652e-07
1.701791.7429611.267317e-07
1.710521.7428051.321257e-07
1.719291.7426491.375474e-07
1.728111.7424911.429969e-07
1.736971.7423321.484744e-07
1.745881.7421711.539799e-07
1.754831.742011.595137e-07
1.763831.7418471.650759e-07
1.772881.7416831.706666e-07
1.781971.7415171.762859e-07
1.791111.741351.819341e-07
1.81.7411871.874300e-07
1.800291.7411821.880593e-07
1.809531.7410122.078706e-07
1.818811.7408412.277836e-07
1.828131.7406682.477986e-07
1.837511.7404942.679164e-07
1.846931.7403182.881373e-07
1.856411.7401413.084619e-07
1.865931.7399623.288907e-07
1.87551.7397823.494243e-07
1.885111.73963.700632e-07
1.894781.7394173.908080e-07
1.90451.7392314.116591e-07
1.914271.7390454.326172e-07
1.924081.7388564.536828e-07
1.933951.7386664.748564e-07
1.943871.7384744.961386e-07
1.953841.738285.175299e-07
1.963861.7380855.390309e-07
1.973931.7378885.606423e-07
1.984051.7376885.823644e-07
1.994231.7374876.041980e-07
21.7373736.165800e-07
2.004461.7372846.456820e-07
2.014741.737087.128056e-07
2.025071.7368737.802734e-07
2.035461.7366648.480872e-07
2.045891.7364539.162488e-07
2.056391.736249.847599e-07
2.066931.7360251.053622e-06
2.077531.7358081.122838e-06
2.088191.7355891.192409e-06
2.09891.7353671.262336e-06
2.109661.7351441.332622e-06
2.120481.7349181.403269e-06
2.131361.734691.474278e-06
2.142291.7344591.545651e-06
2.153271.7342271.617390e-06
2.164321.7339921.689497e-06
2.175421.7337541.761974e-06
2.186571.7335141.834822e-06
2.197791.7332721.908044e-06
2.21.7332241.922500e-06
2.209061.7330272.192209e-06
2.220391.7327792.529564e-06
2.231771.7325292.868649e-06
2.243221.7322763.209473e-06
2.254721.7320213.552045e-06
2.266291.7317633.896374e-06
2.277911.7315024.242468e-06
2.289591.7312394.590338e-06
2.301331.7309724.939991e-06
2.313141.7307035.291438e-06
2.3251.7304315.644687e-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
—