Optical constants

Refractive index of H-LAK54 (CDGM)

H-LAK54: 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
1.734
Extinction coefficient k
2.81403e-08
Permittivity ε1
3.00675
Permittivity ε2
9.75903e-08
Absorption coefficient α
0.00601806 cm⁻¹
Penetration depth δ = λ/(2πk)
3.32333e+09 nm
Abbe number Vd
51.486
Chromatic dispersion dn/dλ
-0.0734296 µm⁻¹
Group index ng
1.77714
Group velocity dispersion
130.71 fs²/mm
Dispersion parameter D
-713.093 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-LAK54 (CDGM): H-LAK54
cdgm_h_lak54 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-LAK54", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_lak54.range_nm)  # (302, 2325) nm
eps = cdgm_h_lak54.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=1.20772937λ2λ2−0.0176389155+0.737418371λ2λ2−0.000666515982+1.35749026λ2λ2−96.9938806

Valid from 0.302 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.20772937
C30.0176389155
C40.737418371
C50.000666515982
C61.35749026
C796.9938806

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 5.91e-06 1.71e-08 -2.96e-11 5.65e-07 5.05e-10 0.196
nd
1.734000
Vd
51.485829
glass code
734515
density
value: 4010
thermal expansion
value: 5.1e-06, temperature range: 243 343; value: 7.4e-06, temperature range: 293 573
dPgF
-0.0086
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 4.31e-06 K⁻¹ at 633 nm, dn/dT = 3.53e-06 K⁻¹ at 1310 nm, dn/dT = 3.45e-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-LAK54 (CDGM), H-LAK54: n and k versus wavelength
λ (µm)nk
0.3021.7996894.753560e-06
0.3035491.7986574.514857e-06
0.3051061.7976394.274930e-06
0.306671.7966364.033773e-06
0.3082431.7956473.791378e-06
0.3098241.7946723.547741e-06
0.311.7945653.520600e-06
0.3114131.7937113.361967e-06
0.313011.7927633.182646e-06
0.3146151.7918283.002406e-06
0.3162291.7909072.821241e-06
0.317851.7899982.639147e-06
0.3194811.7891012.456119e-06
0.321.7888192.397800e-06
0.3211191.7882172.316042e-06
0.3227661.7873452.195722e-06
0.3244211.7864852.074785e-06
0.3260851.7856371.953228e-06
0.3277571.78481.831048e-06
0.3294381.7839741.708240e-06
0.331.7837021.667200e-06
0.3311281.783161.601371e-06
0.3328261.7823561.502247e-06
0.3345331.7815641.402615e-06
0.3362491.7807811.302472e-06
0.3379731.7800091.201816e-06
0.3397061.7792481.100643e-06
0.341.779121.083500e-06
0.3414481.7784961.026794e-06
0.34321.7777559.582414e-07
0.344961.7770238.893369e-07
0.3467291.77638.200789e-07
0.3485071.7755877.504658e-07
0.351.7749996.920200e-07
0.3502941.7748846.850570e-07
0.3520911.7741896.425647e-07
0.3538971.7735035.998543e-07
0.3557121.7728275.569250e-07
0.3575361.7721595.137755e-07
0.3593691.7714994.704047e-07
0.361.7712754.554900e-07
0.3612121.7708484.358989e-07
0.3630651.7702054.059665e-07
0.3649271.7695713.758806e-07
0.3667981.7689443.456403e-07
0.368681.7683253.152450e-07
0.371.7678982.939100e-07
0.370571.7677142.881857e-07
0.3724711.7671112.691125e-07
0.3743811.7665162.499415e-07
0.3763011.7659272.306722e-07
0.3782311.7653462.113040e-07
0.381.7648231.935500e-07
0.3801711.7647731.925745e-07
0.382121.7642061.814338e-07
0.384081.7636471.702360e-07
0.386051.7630941.589808e-07
0.388031.7625481.476679e-07
0.391.7620141.364100e-07
0.390021.7620091.363384e-07
0.392021.7614761.291036e-07
0.394031.760951.218317e-07
0.3960511.760431.145225e-07
0.3980821.7599171.071758e-07
0.41.759441.002400e-07
0.4001241.759411.000583e-07
0.4021761.7589099.705154e-08
0.4042391.7584149.402936e-08
0.4063121.7579249.099169e-08
0.4083961.7574418.793844e-08
0.410491.7569648.486952e-08
0.4125951.7564928.178487e-08
0.4147111.7560267.868440e-08
0.4168381.7555657.556803e-08
0.4189761.755117.243568e-08
0.421.7548947.093500e-08
0.4211251.754667.012201e-08
0.4232841.7542156.856062e-08
0.4254551.7537766.699123e-08
0.4276371.7533426.541379e-08
0.429831.7529126.382825e-08
0.4320351.7524886.223459e-08
0.434251.7520696.063275e-08
0.4364771.7516555.902270e-08
0.4387161.7512455.740439e-08
0.441.7510135.647600e-08
0.4409661.750845.606182e-08
0.4432271.750445.509198e-08
0.44551.7500445.411716e-08
0.4477851.7496535.313734e-08
0.4500821.7492665.215250e-08
0.452391.7488845.116260e-08
0.454711.7485065.016763e-08
0.4570421.7481334.916756e-08
0.4593861.7477634.816236e-08
0.461.7476674.789900e-08
0.4617421.7473984.707075e-08
0.464111.7470374.594474e-08
0.466491.746684.481296e-08
0.4688831.7463274.367537e-08
0.4712871.7459774.253195e-08
0.4737041.7456324.138266e-08
0.4761341.7452914.022748e-08
0.4785751.7449533.906638e-08
0.481.7447583.838900e-08
0.481031.7446193.805791e-08
0.4834971.7442883.726478e-08
0.4859761.7439623.646758e-08
0.4884691.7436393.566630e-08
0.4909741.7433193.486090e-08
0.4934921.7430033.405138e-08
0.4960231.742693.323770e-08
0.4985671.7423813.241985e-08
0.51.7422093.195900e-08
0.5011231.7420753.183274e-08
0.5036931.7417723.154392e-08
0.5062771.7414733.125362e-08
0.5088731.7411773.096184e-08
0.5114831.7408843.066855e-08
0.5141061.7405943.037376e-08
0.5167431.7403073.007746e-08
0.5193931.7400232.977964e-08
0.5220561.7397422.948029e-08
0.5247341.7394642.917941e-08
0.5274251.7391892.887698e-08
0.530131.7389172.857300e-08
0.5328491.7386482.826747e-08
0.5355811.7383822.796036e-08
0.5383281.7381182.765169e-08
0.5410891.7378572.734142e-08
0.5438641.7375992.702957e-08
0.5466531.7373432.671612e-08
0.5494571.737092.640106e-08
0.551.7370412.634000e-08
0.5522751.736842.644891e-08
0.5551071.7365922.658452e-08
0.5579541.7363462.672083e-08
0.5608151.7361032.685783e-08
0.5636911.7358632.699554e-08
0.5665821.7356252.713396e-08
0.5694881.7353892.727309e-08
0.5724091.7351562.741293e-08
0.5753441.7349252.755348e-08
0.5782951.7346962.769476e-08
0.5812611.734472.783676e-08
0.5842421.7342462.797949e-08
0.5872381.7340232.812296e-08
0.590251.7338042.826715e-08
0.5932771.7335862.841209e-08
0.5963191.733372.855777e-08
0.5993781.7331572.870420e-08
0.61.7331132.873400e-08
0.6024521.7329452.885143e-08
0.6055411.7327352.899943e-08
0.6086471.7325282.914818e-08
0.6117681.7323222.929770e-08
0.6149061.7321192.944798e-08
0.6180591.7319172.959904e-08
0.6212291.7317172.975087e-08
0.6244151.7315192.990348e-08
0.6276171.7313233.005687e-08
0.6308361.7311293.021105e-08
0.6340711.7309363.036601e-08
0.6373231.7307453.052178e-08
0.6405921.7305563.067834e-08
0.6438771.7303693.083570e-08
0.6471791.7301833.099388e-08
0.651.7300273.112900e-08
0.6504981.7299993.109705e-08
0.6538341.7298173.088307e-08
0.6571871.7296363.066800e-08
0.6605581.7294573.045182e-08
0.6639451.7292793.023454e-08
0.6673511.7291033.001614e-08
0.6707731.7289292.979662e-08
0.6742131.7287552.957597e-08
0.6776711.7285842.935419e-08
0.6811461.7284142.913128e-08
0.684641.7282452.890722e-08
0.6881511.7280782.868201e-08
0.691681.7279122.845565e-08
0.6952271.7277472.822813e-08
0.6987931.7275842.799944e-08
0.71.727532.792200e-08
0.7023761.7274232.786482e-08
0.7059791.7272622.777815e-08
0.7095991.7271032.769104e-08
0.7132381.7269452.760348e-08
0.7168961.7267882.751548e-08
0.7205731.7266332.742702e-08
0.7242681.7264792.733810e-08
0.7279831.7263262.724873e-08
0.7317161.7261742.715891e-08
0.7354691.7260232.706862e-08
0.7392411.7258742.697787e-08
0.7430321.7257252.688665e-08
0.7468431.7255782.679497e-08
0.7506731.7254322.670281e-08
0.7545231.7252862.661019e-08
0.7583921.7251422.651708e-08
0.7622821.7249992.642350e-08
0.7661911.7248572.632944e-08
0.770121.7247162.623490e-08
0.774071.7245762.613988e-08
0.778041.7244372.604436e-08
0.782031.7242992.594836e-08
0.7860411.7241622.585186e-08
0.7900721.7240252.575487e-08
0.7941241.723892.565738e-08
0.7981961.7237552.555939e-08
0.81.7236962.551600e-08
0.802291.7236222.527816e-08
0.8064051.7234892.485082e-08
0.810541.7233572.442129e-08
0.8146971.7232262.398956e-08
0.8188751.7230962.355561e-08
0.8230751.7229662.311944e-08
0.8272961.7228372.268103e-08
0.8315391.7227092.224037e-08
0.8358031.7225822.179745e-08
0.840091.7224562.135227e-08
0.8443981.722332.090479e-08
0.8487291.7222052.045503e-08
0.851.7221682.032300e-08
0.8530821.722081.995414e-08
0.8574571.7219571.943045e-08
0.8618541.7218341.890407e-08
0.8662741.7217111.837499e-08
0.8707171.7215891.784320e-08
0.8751821.7214681.730869e-08
0.8796711.7213481.677143e-08
0.8841821.7212281.623141e-08
0.8887171.7211081.568863e-08
0.8932741.720991.514306e-08
0.8978561.7208711.459469e-08
0.91.7208161.433800e-08
0.902461.7207531.437722e-08
0.9070881.7206361.445099e-08
0.9117411.720521.452514e-08
0.9164161.7204031.459968e-08
0.9211161.7202881.467459e-08
0.925841.7201721.474989e-08
0.9305881.7200571.482558e-08
0.9353611.7199431.490165e-08
0.9401581.7198291.497812e-08
0.944981.7197151.505497e-08
0.9498261.7196021.513222e-08
0.951.7195981.513500e-08
0.9546971.719491.520978e-08
0.9595931.7193771.528772e-08
0.9645151.7192651.536607e-08
0.9694611.7191531.544482e-08
0.9744331.7190421.552397e-08
0.979431.7189311.560353e-08
0.9844531.718821.568350e-08
0.9895021.718711.576387e-08
0.9945771.71861.584466e-08
0.9996781.718491.592587e-08
11.7184831.593100e-08
1.00481.718381.600755e-08
1.009961.7182711.608966e-08
1.015141.7181621.617219e-08
1.020341.7180531.625514e-08
1.025581.7179441.633851e-08
1.030841.7178361.642232e-08
1.036121.7177271.650655e-08
1.041441.7176191.659122e-08
1.046781.7175111.667632e-08
1.052151.7174041.676185e-08
1.057541.7172961.684783e-08
1.061.7172471.688700e-08
1.062971.7171881.693425e-08
1.068421.7170811.702113e-08
1.07391.7169741.710844e-08
1.07941.7168661.719621e-08
1.084941.7167591.728443e-08
1.09051.7166521.737309e-08
1.09611.7165451.746222e-08
1.101721.7164381.755180e-08
1.107371.7163311.764184e-08
1.113051.7162241.773234e-08
1.118761.7161171.782330e-08
1.124491.716011.791474e-08
1.130261.7159031.800664e-08
1.136061.7157961.809901e-08
1.141881.7156891.819185e-08
1.147741.7155821.828518e-08
1.153621.7154751.837898e-08
1.159541.7153681.847326e-08
1.165491.715261.856802e-08
1.171471.7151531.866328e-08
1.177471.7150451.875902e-08
1.183511.7149381.885525e-08
1.189581.714831.895197e-08
1.195681.7147221.904919e-08
1.21.7146451.911800e-08
1.201811.7146131.914690e-08
1.207981.7145051.924509e-08
1.214171.7143971.934377e-08
1.22041.7142881.944297e-08
1.226661.7141791.954267e-08
1.232951.714071.964289e-08
1.239271.713961.974361e-08
1.245631.7138511.984486e-08
1.252021.7137411.994662e-08
1.258441.713632.004891e-08
1.264891.713522.015172e-08
1.271381.7134092.025506e-08
1.27791.7132982.035893e-08
1.284451.7131862.046333e-08
1.291041.7130752.056826e-08
1.297661.7129622.067374e-08
1.304321.712852.077975e-08
1.311011.7127372.088631e-08
1.317731.7126242.099342e-08
1.324491.712512.110107e-08
1.331281.7123962.120928e-08
1.338111.7122812.131804e-08
1.344971.7121662.142736e-08
1.351871.7120512.153724e-08
1.35881.7119352.164769e-08
1.365771.7118192.175870e-08
1.372771.7117022.187028e-08
1.379811.7115842.198243e-08
1.386891.7114662.209515e-08
1.3941.7113482.220846e-08
1.41.7112482.230400e-08
1.401151.7112292.239585e-08
1.408341.7111092.296896e-08
1.415561.7109892.354500e-08
1.422821.7108682.412400e-08
1.430121.7107472.470597e-08
1.437451.7106252.529092e-08
1.444821.7105022.587888e-08
1.452231.7103782.646984e-08
1.459681.7102542.706384e-08
1.467171.710132.766089e-08
1.474691.7100042.826100e-08
1.482251.7098782.886418e-08
1.489861.7097522.947046e-08
1.49751.7096243.007985e-08
1.505181.7094963.069236e-08
1.51291.7093673.130802e-08
1.520651.7092373.192683e-08
1.528451.7091063.254881e-08
1.536291.7089743.317399e-08
1.544171.7088423.380237e-08
1.552091.7087093.443397e-08
1.560051.7085753.506882e-08
1.568051.708443.570692e-08
1.576091.7083043.634829e-08
1.584181.7081673.699295e-08
1.59231.708033.764092e-08
1.61.7078993.825500e-08
1.600471.7078913.867075e-08
1.608671.7077514.598553e-08
1.616921.7076115.333782e-08
1.625221.7074696.072782e-08
1.633551.7073276.815572e-08
1.641931.7071837.562172e-08
1.650351.7070388.312600e-08
1.658811.7068939.066877e-08
1.667321.7067469.825022e-08
1.675871.7065981.058706e-07
1.684471.7064491.135300e-07
1.693111.7062991.212287e-07
1.701791.7061471.289668e-07
1.710521.7059951.367447e-07
1.719291.7058411.445625e-07
1.728111.7056861.524203e-07
1.736971.705531.603185e-07
1.745881.7053721.682571e-07
1.754831.7052141.762365e-07
1.763831.7050541.842568e-07
1.772881.7048921.923182e-07
1.781971.704732.004209e-07
1.791111.7045652.085653e-07
1.81.7044052.164900e-07
1.800291.70442.170767e-07
1.809531.7042332.355465e-07
1.818811.7040652.541110e-07
1.828131.7038952.727708e-07
1.837511.7037242.915262e-07
1.846931.7035523.103778e-07
1.856411.7033773.293262e-07
1.865931.7032023.483717e-07
1.87551.7030253.675148e-07
1.885111.7028463.867562e-07
1.894781.7026654.060962e-07
1.90451.7024834.255354e-07
1.914271.70234.450743e-07
1.924081.7021144.647134e-07
1.933951.7019274.844532e-07
1.943871.7017395.042943e-07
1.953841.7015485.242371e-07
1.963861.7013565.442822e-07
1.973931.7011625.644301e-07
1.984051.7009665.846813e-07
1.994231.7007686.050364e-07
21.7006566.165800e-07
2.004461.7005696.443784e-07
2.014741.7003677.084951e-07
2.025071.7001647.729406e-07
2.035461.6999588.377166e-07
2.045891.6997519.028248e-07
2.056391.6995419.682670e-07
2.066931.699331.034045e-06
2.077531.6991171.100160e-06
2.088191.6989011.166614e-06
2.09891.6986831.233409e-06
2.109661.6984631.300547e-06
2.120481.6982411.368028e-06
2.131361.6980171.435856e-06
2.142291.6977911.504032e-06
2.153271.6975621.572558e-06
2.164321.6973311.641434e-06
2.175421.6970971.710665e-06
2.186571.6968611.780250e-06
2.197791.6966231.850192e-06
2.21.6965761.864000e-06
2.209061.6963832.152177e-06
2.220391.6961392.512632e-06
2.231771.6958942.874936e-06
2.243221.6956463.239098e-06
2.254721.6953953.605127e-06
2.266291.6951413.973034e-06
2.277911.6948854.342827e-06
2.289591.6946264.714517e-06
2.301331.6943655.088113e-06
2.313141.6941015.463625e-06
2.3251.6938345.841062e-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
—