Optical constants

Refractive index of H-ZLAF66GT (CDGM)

H-ZLAF66GT: n,k 0.365–2.325 µm

Data
formula 2 + tabulated k
Range
0.365–2.325 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.365–2.325 µm
Refractive index n
1.801
Extinction coefficient k
3.97490e-08
Permittivity ε1
3.24359
Permittivity ε2
1.43175e-07
Absorption coefficient α
0.00850069 cm⁻¹
Penetration depth δ = λ/(2πk)
2.35275e+09 nm
Abbe number Vd
34.967
Chromatic dispersion dn/dλ
-0.115962 µm⁻¹
Group index ng
1.86913
Group velocity dispersion
227.059 fs²/mm
Dispersion parameter D
-1238.73 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-ZLAF66GT (CDGM): H-ZLAF66GT
cdgm_h_zlaf66gt = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-ZLAF66GT", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_zlaf66gt.range_nm)  # (365, 2325) nm
eps = cdgm_h_zlaf66gt.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=0.233018785λ2λ2−0.0537435377+1.90660392λ2λ2−0.0114336559+1.37147086λ2λ2−110.630887

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C20.233018785
C30.0537435377
C41.90660392
C50.0114336559
C61.37147086
C7110.630887

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -1.89e-06 1.64e-08 -1.41e-10 8.7e-07 1.01e-09 0.245
nd
1.801000
Vd
34.966919
glass code
801350
density
value: 3890
thermal expansion
value: 7.9e-06, temperature range: 243 343; value: 9.3e-06, temperature range: 293 573
dPgF
0.0016
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 4.11e-07 K⁻¹ at 633 nm, dn/dT = -8.24e-07 K⁻¹ at 1310 nm, dn/dT = -9.12e-07 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 425 wavelengths, the same grid as the API and the library
H-ZLAF66GT (CDGM), H-ZLAF66GT: n and k versus wavelength
λ (µm)nk
0.3651.8640073.189700e-06
0.3666981.8628672.754672e-06
0.3684031.8617462.317621e-06
0.371.8607171.908500e-06
0.3701171.8606431.896592e-06
0.3718381.8595581.721281e-06
0.3735681.8584891.545155e-06
0.3753061.8574381.368209e-06
0.3770511.8564031.190441e-06
0.3788051.8553841.011845e-06
0.381.8547018.901600e-07
0.3805671.8543818.684929e-07
0.3823371.8533938.008504e-07
0.3841161.852427.328933e-07
0.3859021.8514616.646201e-07
0.3876971.8505175.960294e-07
0.38951.8495875.271196e-07
0.391.8493335.080300e-07
0.3913121.8486714.853746e-07
0.3931321.8477684.539484e-07
0.3949611.8468794.223760e-07
0.3967981.8460023.906567e-07
0.3986441.8451383.587900e-07
0.41.8445133.353700e-07
0.4004981.8442863.319048e-07
0.4023611.8434463.189375e-07
0.4042321.8426183.059099e-07
0.4061121.8418012.928217e-07
0.4080011.8409962.796727e-07
0.4098991.8402032.664624e-07
0.4118061.839422.531907e-07
0.4137211.8386482.398573e-07
0.4156451.8378862.264619e-07
0.4175791.8371352.130042e-07
0.4195211.8363941.994839e-07
0.421.8362131.961500e-07
0.4214721.8356621.922320e-07
0.4234331.8349411.870153e-07
0.4254021.8342291.817744e-07
0.4273811.8335261.765091e-07
0.4293691.8328331.712193e-07
0.4313661.8321491.659050e-07
0.4333721.8314731.605659e-07
0.4353881.8308071.552019e-07
0.4374131.8301491.498130e-07
0.4394481.8294991.443991e-07
0.441.8293251.429300e-07
0.4414921.8288581.403042e-07
0.4435451.8282251.366900e-07
0.4456091.82761.330590e-07
0.4476811.8269821.294111e-07
0.4497641.8263731.257462e-07
0.4518561.8257711.220643e-07
0.4539571.8251771.183652e-07
0.4560691.8245891.146490e-07
0.458191.824011.109155e-07
0.461.8235231.077300e-07
0.4603211.8234371.074272e-07
0.4624621.8228711.054092e-07
0.4646131.8223121.033818e-07
0.4667751.821761.013450e-07
0.4689461.8212159.929874e-08
0.4711271.8206769.724293e-08
0.4733181.8201439.517757e-08
0.475521.8196179.310260e-08
0.4777321.8190979.101798e-08
0.4799541.8185838.892366e-08
0.481.8185738.888000e-08
0.4821861.8180768.662198e-08
0.4844291.8175748.430539e-08
0.4866821.8170788.197802e-08
0.4889461.8165887.963982e-08
0.491221.8161047.729075e-08
0.4935051.8156257.493075e-08
0.49581.8151527.255978e-08
0.4981071.8146847.017777e-08
0.51.8143056.822200e-08
0.5004231.8142216.801680e-08
0.5027511.8137646.688864e-08
0.5050891.8133126.575523e-08
0.5074391.8128656.461656e-08
0.5097991.8124236.347258e-08
0.512171.8119876.232329e-08
0.5145531.8115556.116865e-08
0.5169461.8111276.000864e-08
0.519351.8107055.884323e-08
0.5217661.8102875.767240e-08
0.5241931.8098745.649613e-08
0.5266311.8094665.531439e-08
0.5290811.8090615.412714e-08
0.5315421.8086625.293438e-08
0.5340141.8082675.173607e-08
0.5364981.8078765.053219e-08
0.5389931.8074894.932270e-08
0.54151.8071064.810759e-08
0.5440191.8067284.688683e-08
0.5465491.8063534.566039e-08
0.5490921.8059834.442824e-08
0.551.8058524.398800e-08
0.5516461.8056164.380247e-08
0.5542121.8052544.351319e-08
0.5567891.8048954.322256e-08
0.5593791.804544.293059e-08
0.5619811.8041894.263725e-08
0.5645951.8038414.234256e-08
0.5672211.8034974.204649e-08
0.5698591.8031574.174904e-08
0.572511.802824.145021e-08
0.5751731.8024874.114999e-08
0.5778481.8021574.084838e-08
0.5805361.8018314.054536e-08
0.5832361.8015084.024093e-08
0.5859491.8011883.993509e-08
0.5886751.8008713.962782e-08
0.5914131.8005583.931913e-08
0.5941641.8002483.900900e-08
0.5969271.7999413.869742e-08
0.5997041.7996373.838440e-08
0.61.7996053.835100e-08
0.6024931.7993363.799088e-08
0.6052961.7990383.758611e-08
0.6081111.7987433.717945e-08
0.610941.7984513.677089e-08
0.6137811.7981623.636044e-08
0.6166361.7978763.594808e-08
0.6195041.7975923.553380e-08
0.6223861.7973123.511759e-08
0.6252811.7970343.469945e-08
0.6281891.7967583.427936e-08
0.6311111.7964863.385732e-08
0.6340471.7962163.343332e-08
0.6369961.7959493.300734e-08
0.6399591.7956843.257938e-08
0.6429351.7954223.214943e-08
0.6459261.7951623.171749e-08
0.648931.7949053.128353e-08
0.651.7948143.112900e-08
0.6519491.794653.100402e-08
0.6549811.7943973.080952e-08
0.6580281.7941473.061412e-08
0.6610881.79393.041780e-08
0.6641631.7936543.022058e-08
0.6672521.7934113.002243e-08
0.6703561.793172.982337e-08
0.6734741.7929322.962337e-08
0.6766071.7926952.942245e-08
0.6797541.7924612.922060e-08
0.6829151.7922292.901780e-08
0.6860921.7919992.881406e-08
0.6892831.7917712.860938e-08
0.6924891.7915452.840374e-08
0.695711.7913212.819714e-08
0.6989461.7910992.798959e-08
0.71.7910272.792200e-08
0.7021971.7908792.772875e-08
0.7054631.7906612.744149e-08
0.7087451.7904452.715290e-08
0.7120411.7902312.686296e-08
0.7153531.7900192.657168e-08
0.7186811.7898082.627904e-08
0.7220231.78962.598504e-08
0.7253821.7893932.568967e-08
0.7287561.7891882.539292e-08
0.7321461.7889842.509480e-08
0.7355511.7887832.479529e-08
0.7389721.7885832.449439e-08
0.7424091.7883852.419209e-08
0.7458631.7881882.388838e-08
0.7493321.7879942.358326e-08
0.7528171.78782.327672e-08
0.7563191.7876092.296875e-08
0.7598371.7874192.265935e-08
0.7633711.787232.234852e-08
0.7669221.7870432.203623e-08
0.7704891.7868582.172250e-08
0.7740731.7866742.140730e-08
0.7776731.7864912.109064e-08
0.781291.786312.077251e-08
0.7849241.7861312.045289e-08
0.7885751.7859522.013179e-08
0.7922431.7857761.980920e-08
0.7959281.78561.948510e-08
0.799631.7854261.915950e-08
0.81.7854091.912700e-08
0.803351.7852541.875283e-08
0.8070861.7850821.833545e-08
0.810841.7849121.791612e-08
0.8146121.7847431.749485e-08
0.8184011.7845761.707161e-08
0.8222081.7844091.664641e-08
0.8260321.7842441.621923e-08
0.8298741.784081.579006e-08
0.8337341.7839181.535890e-08
0.8376121.7837561.492573e-08
0.8415081.7835961.449054e-08
0.8454221.7834371.405333e-08
0.8493551.7832791.361409e-08
0.851.7832531.354200e-08
0.8533051.7831221.359462e-08
0.8572741.7829661.365781e-08
0.8612621.7828111.372129e-08
0.8652681.7826571.378506e-08
0.8692921.7825051.384913e-08
0.8733361.7823531.391350e-08
0.8773981.7822021.397817e-08
0.8814791.7820531.404315e-08
0.8855791.7819041.410842e-08
0.8896981.7817561.417399e-08
0.8938361.781611.423988e-08
0.8979941.7814641.430606e-08
0.91.7813941.433800e-08
0.9021711.7813191.437260e-08
0.9063671.7811751.443949e-08
0.9105831.7810321.450669e-08
0.9148181.780891.457420e-08
0.9190731.7807491.464203e-08
0.9233481.7806081.471017e-08
0.9276431.7804681.477863e-08
0.9319581.780331.484741e-08
0.9362931.7801921.491651e-08
0.9406481.7800541.498593e-08
0.9450231.7799181.505567e-08
0.9494191.7797821.512573e-08
0.951.7797651.513500e-08
0.9538351.7796471.519605e-08
0.9582711.7795131.526668e-08
0.9627291.779381.533764e-08
0.9672071.7792471.540893e-08
0.9717051.7791151.548055e-08
0.9762251.7789841.555250e-08
0.9807661.7788531.562479e-08
0.9853281.7787231.569742e-08
0.9899111.7785941.577038e-08
0.9945151.7784651.584368e-08
0.9991411.7783371.591732e-08
11.7783141.593100e-08
1.003791.778211.599136e-08
1.008461.7780831.606575e-08
1.013151.7779571.614049e-08
1.017861.7778311.621558e-08
1.022591.7777061.629101e-08
1.027351.7775811.636680e-08
1.032131.7774571.644293e-08
1.036931.7773341.651943e-08
1.041751.7772111.659628e-08
1.04661.7770881.667348e-08
1.051471.7769661.675105e-08
1.056361.7768451.682897e-08
1.061.7767551.688700e-08
1.061271.7767231.690726e-08
1.066211.7766031.698593e-08
1.071171.7764831.706496e-08
1.076151.7763631.714435e-08
1.081151.7762441.722412e-08
1.086181.7761251.730426e-08
1.091241.7760061.738477e-08
1.096311.7758881.746565e-08
1.101411.775771.754691e-08
1.106531.7756531.762855e-08
1.111681.7755361.771057e-08
1.116851.7754191.779297e-08
1.122051.7753031.787576e-08
1.127271.7751871.795892e-08
1.132511.7750711.804248e-08
1.137781.7749561.812642e-08
1.143071.774841.821076e-08
1.148391.7747251.829549e-08
1.153731.7746111.838061e-08
1.159091.7744971.846612e-08
1.164481.7743821.855204e-08
1.16991.7742681.863835e-08
1.175341.7741551.872507e-08
1.180811.7740411.881219e-08
1.18631.7739281.889971e-08
1.191821.7738151.898764e-08
1.197361.7737021.907598e-08
1.21.7736491.911800e-08
1.202931.7735891.916472e-08
1.208531.7734771.925385e-08
1.214151.7733641.934340e-08
1.21981.7732521.943336e-08
1.225471.773141.952374e-08
1.231171.7730281.961454e-08
1.23691.7729161.970577e-08
1.242651.7728041.979742e-08
1.248431.7726921.988949e-08
1.254241.772581.998199e-08
1.260071.7724692.007493e-08
1.265931.7723572.016829e-08
1.271821.7722462.026209e-08
1.277741.7721342.035633e-08
1.283681.7720222.045101e-08
1.289651.7719112.054612e-08
1.295651.7717992.064168e-08
1.301671.7716882.073768e-08
1.307731.7715762.083413e-08
1.313811.7714652.093103e-08
1.319921.7713532.102837e-08
1.326061.7712412.112617e-08
1.332231.771132.122443e-08
1.338431.7710182.132314e-08
1.344651.7709062.142231e-08
1.350911.7707942.152195e-08
1.357191.7706822.162204e-08
1.36351.7705692.172260e-08
1.369851.7704572.182363e-08
1.376221.7703442.192513e-08
1.382621.7702322.202711e-08
1.389051.7701192.212955e-08
1.395511.7700062.223247e-08
1.41.7699282.230400e-08
1.4021.7698932.259142e-08
1.408521.7697792.352812e-08
1.415071.7696662.446918e-08
1.421661.7695522.541462e-08
1.428271.7694382.636445e-08
1.434911.7693242.731870e-08
1.441591.7692092.827739e-08
1.448291.7690942.924054e-08
1.455031.7689793.020816e-08
1.46181.7688643.118029e-08
1.468591.7687483.215694e-08
1.475431.7686323.313814e-08
1.482291.7685163.412389e-08
1.489181.7683993.511424e-08
1.496111.7682823.610918e-08
1.503071.7681653.710876e-08
1.510061.7680483.811299e-08
1.517081.767933.912188e-08
1.524141.7678114.013547e-08
1.531231.7676924.115378e-08
1.538351.7675734.217682e-08
1.545511.7674544.320462e-08
1.55271.7673344.423720e-08
1.559921.7672134.527458e-08
1.567171.7670924.631679e-08
1.574461.7669714.736384e-08
1.581791.7668494.841577e-08
1.589141.7667274.947258e-08
1.596541.7666045.053432e-08
1.61.7665465.103200e-08
1.603961.766485.430908e-08
1.611421.7663576.048113e-08
1.618921.7662326.668187e-08
1.626451.7661077.291147e-08
1.634011.7659827.917003e-08
1.641611.7658568.545771e-08
1.649251.7657299.177463e-08
1.656921.7656029.812094e-08
1.664631.7654741.044968e-07
1.672371.7653451.109022e-07
1.680151.7652161.173375e-07
1.687961.7650861.238027e-07
1.695811.7649561.302980e-07
1.70371.7648251.368235e-07
1.711631.7646931.433793e-07
1.719591.764561.499657e-07
1.727591.7644271.565826e-07
1.735621.7642931.632304e-07
1.743691.7641581.699091e-07
1.751811.7640231.766188e-07
1.759951.7638871.833597e-07
1.768141.763751.901320e-07
1.776361.7636121.969358e-07
1.784631.7634732.037713e-07
1.792931.7633342.106385e-07
1.81.7632152.164900e-07
1.801271.7631942.182928e-07
1.809641.7630532.302193e-07
1.818061.7629112.422012e-07
1.826521.7627682.542389e-07
1.835011.7626242.663326e-07
1.843551.762482.784825e-07
1.852121.7623342.906890e-07
1.860741.7621883.029522e-07
1.869391.762043.152725e-07
1.878091.7618923.276501e-07
1.886821.7617423.400852e-07
1.89561.7615923.525782e-07
1.904421.761443.651293e-07
1.913281.7612883.777388e-07
1.922181.7611353.904069e-07
1.931121.760984.031339e-07
1.94011.7608244.159202e-07
1.949121.7606684.287659e-07
1.958191.760514.416714e-07
1.96731.7603514.546369e-07
1.976451.7601914.676627e-07
1.985641.7600294.807491e-07
1.994881.7598674.938963e-07
21.7597775.011900e-07
2.004161.7597035.199212e-07
2.013481.7595395.619452e-07
2.022841.7593736.041647e-07
2.032251.7592056.465805e-07
2.04171.7590376.891936e-07
2.05121.7588677.320050e-07
2.060741.7586967.750154e-07
2.070331.7585238.182259e-07
2.079961.7583498.616374e-07
2.089631.7581749.052508e-07
2.099351.7579989.490671e-07
2.109121.757829.930872e-07
2.118931.757641.037312e-06
2.128781.7574591.081743e-06
2.138681.7572771.126380e-06
2.148631.7570931.171225e-06
2.158621.7569081.216278e-06
2.168671.7567221.261541e-06
2.178751.7565331.307014e-06
2.188891.7563431.352699e-06
2.199071.7561521.398597e-06
2.21.7561341.402800e-06
2.20931.7559591.524660e-06
2.219571.7557641.659365e-06
2.22991.7555681.794697e-06
2.240271.755371.930658e-06
2.250691.7551712.067252e-06
2.261161.7549692.204480e-06
2.271671.7547662.342348e-06
2.282241.7545612.480856e-06
2.292861.7543552.620009e-06
2.303521.7541472.759809e-06
2.314241.7539362.900259e-06
2.3251.7537243.041363e-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
—