Optical constants

Refractive index of H-LAF2 (CDGM)

H-LAF2: 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
1.717
Extinction coefficient k
9.36134e-09
Permittivity ε1
2.94808
Permittivity ε2
3.21468e-08
Absorption coefficient α
0.00200201 cm⁻¹
Penetration depth δ = λ/(2πk)
9.98996e+09 nm
Abbe number Vd
47.889
Chromatic dispersion dn/dλ
-0.0766972 µm⁻¹
Group index ng
1.76206
Group velocity dispersion
141.788 fs²/mm
Dispersion parameter D
-773.529 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-LAF2 (CDGM): H-LAF2
cdgm_h_laf2 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-LAF2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_laf2.range_nm)  # (365, 2325) nm
eps = cdgm_h_laf2.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=1.62865121λ2λ2−0.00864219294+1.11837078λ2λ2−109.900598+0.253252293λ2λ2−0.0342503107

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.62865121
C30.00864219294
C41.11837078
C5109.900598
C60.253252293
C70.0342503107

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -4.12e-06 2.75e-08 -1.05e-10 8.05e-07 -8.24e-10 0.107
nd
1.717000
Vd
47.888609
glass code
717479
density
value: 4250
thermal expansion
value: 7.4e-06, temperature range: 243 343; value: 9.1e-06, temperature range: 293 573
dPgF
-0.0035
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -1.16e-06 K⁻¹ at 633 nm, dn/dT = -2.02e-06 K⁻¹ at 1310 nm, dn/dT = -2.09e-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 425 wavelengths, the same grid as the API and the library
H-LAF2 (CDGM), H-LAF2: n and k versus wavelength
λ (µm)nk
0.3651.7553246.792550e-07
0.3666981.7546935.970795e-07
0.3684031.754075.145218e-07
0.371.7534974.372400e-07
0.3701171.7534554.347694e-07
0.3718381.7528473.983968e-07
0.3735681.7522473.618550e-07
0.3753061.7516543.251433e-07
0.3770511.7510692.882607e-07
0.3788051.7504912.512067e-07
0.381.7501022.259600e-07
0.3805671.7499192.206982e-07
0.3823371.7493552.042712e-07
0.3841161.7487971.877679e-07
0.3859021.7482471.711878e-07
0.3876971.7477021.545306e-07
0.38951.7471651.377959e-07
0.391.7470171.331600e-07
0.3913121.7466331.258338e-07
0.3931321.7461081.156713e-07
0.3949611.7455891.054616e-07
0.3967981.7450779.520438e-08
0.3986441.744578.489944e-08
0.41.7442037.732600e-08
0.4004981.7440697.657422e-08
0.4023611.7435747.376095e-08
0.4042321.7430857.093459e-08
0.4061121.7426026.809508e-08
0.4080011.7421246.524237e-08
0.4098991.7416516.237639e-08
0.4118061.7411845.949708e-08
0.4137211.7407235.660438e-08
0.4156451.7402665.369822e-08
0.4175791.7398155.077854e-08
0.4195211.7393694.784529e-08
0.421.739264.712200e-08
0.4214721.7389284.598332e-08
0.4234331.7384924.446724e-08
0.4254021.7380614.294411e-08
0.4273811.7376354.141389e-08
0.4293691.7372143.987656e-08
0.4313661.7367973.833207e-08
0.4333721.7363853.678040e-08
0.4353881.7359773.522151e-08
0.4374131.7355743.365538e-08
0.4394481.7351763.208195e-08
0.441.7350683.165500e-08
0.4414921.7347813.093701e-08
0.4435451.7343912.994875e-08
0.4456091.7340062.895589e-08
0.4476811.7336242.795842e-08
0.4497641.7332472.695631e-08
0.4518561.7328742.594953e-08
0.4539571.7325052.493807e-08
0.4560691.732142.392191e-08
0.458191.7317792.290102e-08
0.461.7314752.203000e-08
0.4603211.7314212.198367e-08
0.4624621.7310682.167492e-08
0.4646131.7307182.136474e-08
0.4667751.7303722.105311e-08
0.4689461.730032.074004e-08
0.4711271.7296912.042551e-08
0.4733181.7293562.010951e-08
0.475521.7290241.979205e-08
0.4777321.7286961.947311e-08
0.4799541.7283721.915268e-08
0.481.7283651.914600e-08
0.4821861.7280511.835999e-08
0.4844291.7277331.755359e-08
0.4866821.7274181.674344e-08
0.4889461.7271071.592952e-08
0.491221.7267991.511181e-08
0.4935051.7264941.429030e-08
0.49581.7261921.346497e-08
0.4981071.7258941.263580e-08
0.51.7256521.195500e-08
0.5004231.7255981.192797e-08
0.5027511.7253061.177934e-08
0.5050891.7250161.163002e-08
0.5074391.7247291.148000e-08
0.5097991.7244461.132929e-08
0.512171.7241651.117788e-08
0.5145531.7238871.102576e-08
0.5169461.7236121.087293e-08
0.519351.7233391.071940e-08
0.5217661.723071.056515e-08
0.5241931.7228031.041018e-08
0.5266311.7225381.025449e-08
0.5290811.7222771.009808e-08
0.5315421.7220189.940938e-09
0.5340141.7217619.783067e-09
0.5364981.7215079.624461e-09
0.5389931.7212569.465118e-09
0.54151.7210079.305034e-09
0.5440191.720769.144205e-09
0.5465491.7205168.982628e-09
0.5490921.7202748.820300e-09
0.551.7201898.762300e-09
0.5516461.7200358.788519e-09
0.5542121.7197988.829399e-09
0.5567891.7195638.870469e-09
0.5593791.7193318.911730e-09
0.5619811.71918.953182e-09
0.5645951.7188728.994828e-09
0.5672211.7186469.036667e-09
0.5698591.7184239.078701e-09
0.572511.7182019.120931e-09
0.5751731.7179829.163356e-09
0.5778481.7177649.205980e-09
0.5805361.7175499.248801e-09
0.5832361.7173369.291822e-09
0.5859491.7171249.335042e-09
0.5886751.7169159.378464e-09
0.5914131.7167079.422088e-09
0.5941641.7165029.465915e-09
0.5969271.7162989.509945e-09
0.5997041.7160979.554180e-09
0.61.7160759.558900e-09
0.6024931.7158979.598596e-09
0.6052961.7156999.643216e-09
0.6081111.7155039.688043e-09
0.610941.7153089.733079e-09
0.6137811.7151169.778324e-09
0.6166361.7149259.823780e-09
0.6195041.7147369.869447e-09
0.6223861.7145499.915327e-09
0.6252811.7143639.961420e-09
0.6281891.7141791.000773e-08
0.6311111.7139961.005425e-08
0.6340471.7138161.010099e-08
0.6369961.7136361.014795e-08
0.6399591.7134591.019512e-08
0.6429351.7132831.024251e-08
0.6459261.7131081.029013e-08
0.648931.7129351.033797e-08
0.651.7128741.035500e-08
0.6519491.7127641.038606e-08
0.6549811.7125941.043440e-08
0.6580281.7124251.048296e-08
0.6610881.7122581.053175e-08
0.6641631.7120931.058076e-08
0.6672521.7119291.063000e-08
0.6703561.7117661.067947e-08
0.6734741.7116041.072918e-08
0.6766071.7114441.077911e-08
0.6797541.7112861.082927e-08
0.6829151.7111281.087967e-08
0.6860921.7109721.093031e-08
0.6892831.7108171.098117e-08
0.6924891.7106641.103228e-08
0.695711.7105121.108362e-08
0.6989461.7103611.113520e-08
0.71.7103121.115200e-08
0.7021971.7102111.118700e-08
0.7054631.7100631.123903e-08
0.7087451.7099151.129130e-08
0.7120411.7097691.134382e-08
0.7153531.7096241.139658e-08
0.7186811.7094811.144958e-08
0.7220231.7093381.150283e-08
0.7253821.7091961.155633e-08
0.7287561.7090561.161008e-08
0.7321461.7089171.166408e-08
0.7355511.7087781.171833e-08
0.7389721.7086411.177283e-08
0.7424091.7085051.182758e-08
0.7458631.708371.188259e-08
0.7493321.7082361.193786e-08
0.7528171.7081031.199338e-08
0.7563191.7079711.204916e-08
0.7598371.707841.210520e-08
0.7633711.707711.216150e-08
0.7669221.7075811.221806e-08
0.7704891.7074531.227489e-08
0.7740731.7073261.233198e-08
0.7776731.7071991.238933e-08
0.781291.7070741.244696e-08
0.7849241.7069491.250485e-08
0.7885751.7068261.256301e-08
0.7922431.7067031.262144e-08
0.7959281.7065811.268014e-08
0.799631.706461.273911e-08
0.81.7064481.274500e-08
0.803351.706341.279840e-08
0.8070861.7062211.285796e-08
0.810841.7061021.291780e-08
0.8146121.7059841.297791e-08
0.8184011.7058671.303831e-08
0.8222081.7057511.309899e-08
0.8260321.7056361.315995e-08
0.8298741.7055211.322119e-08
0.8337341.7054071.328272e-08
0.8376121.7052941.334454e-08
0.8415081.7051821.340664e-08
0.8454221.705071.346903e-08
0.8493551.7049591.353171e-08
0.851.7049411.354200e-08
0.8533051.7048481.359462e-08
0.8572741.7047391.365781e-08
0.8612621.704631.372129e-08
0.8652681.7045211.378506e-08
0.8692921.7044141.384913e-08
0.8733361.7043061.391350e-08
0.8773981.70421.397817e-08
0.8814791.7040941.404315e-08
0.8855791.7039891.410842e-08
0.8896981.7038841.417399e-08
0.8938361.703781.423988e-08
0.8979941.7036771.430606e-08
0.91.7036271.433800e-08
0.9021711.7035741.437260e-08
0.9063671.7034711.443949e-08
0.9105831.7033691.450669e-08
0.9148181.7032681.457420e-08
0.9190731.7031671.464203e-08
0.9233481.7030671.471017e-08
0.9276431.7029671.477863e-08
0.9319581.7028681.484741e-08
0.9362931.7027691.491651e-08
0.9406481.7026711.498593e-08
0.9450231.7025731.505567e-08
0.9494191.7024761.512573e-08
0.951.7024631.513500e-08
0.9538351.7023791.519605e-08
0.9582711.7022821.526668e-08
0.9627291.7021861.533764e-08
0.9672071.7020911.540893e-08
0.9717051.7019951.548055e-08
0.9762251.7019011.555250e-08
0.9807661.7018061.562479e-08
0.9853281.7017121.569742e-08
0.9899111.7016181.577038e-08
0.9945151.7015251.584368e-08
0.9991411.7014321.591732e-08
11.7014151.593100e-08
1.003791.701341.599136e-08
1.008461.7012471.606575e-08
1.013151.7011561.614049e-08
1.017861.7010641.621558e-08
1.022591.7009731.629101e-08
1.027351.7008821.636680e-08
1.032131.7007911.644293e-08
1.036931.7007011.651943e-08
1.041751.7006111.659628e-08
1.04661.7005211.667348e-08
1.051471.7004311.675105e-08
1.056361.7003421.682897e-08
1.061.7002761.688700e-08
1.061271.7002531.690726e-08
1.066211.7001641.698593e-08
1.071171.7000751.706496e-08
1.076151.6999871.714435e-08
1.081151.6998991.722412e-08
1.086181.6998111.730426e-08
1.091241.6997231.738477e-08
1.096311.6996361.746565e-08
1.101411.6995481.754691e-08
1.106531.6994611.762855e-08
1.111681.6993741.771057e-08
1.116851.6992871.779297e-08
1.122051.6992011.787576e-08
1.127271.6991141.795892e-08
1.132511.6990281.804248e-08
1.137781.6989411.812642e-08
1.143071.6988551.821076e-08
1.148391.6987691.829549e-08
1.153731.6986831.838061e-08
1.159091.6985971.846612e-08
1.164481.6985111.855204e-08
1.16991.6984261.863835e-08
1.175341.698341.872507e-08
1.180811.6982541.881219e-08
1.18631.6981691.889971e-08
1.191821.6980831.898764e-08
1.197361.6979981.907598e-08
1.21.6979571.911800e-08
1.202931.6979121.965653e-08
1.208531.6978272.068398e-08
1.214151.6977422.171621e-08
1.21981.6976562.275325e-08
1.225471.6975712.379510e-08
1.231171.6974852.484181e-08
1.23691.69742.589338e-08
1.242651.6973152.694984e-08
1.248431.6972292.801122e-08
1.254241.6971442.907753e-08
1.260071.6970583.014881e-08
1.265931.6969723.122506e-08
1.271821.6968873.230632e-08
1.277741.6968013.339262e-08
1.283681.6967153.448396e-08
1.289651.6966293.558038e-08
1.295651.6965433.668190e-08
1.301671.6964573.778855e-08
1.307731.6963713.890034e-08
1.313811.6962844.001730e-08
1.319921.6961984.113946e-08
1.326061.6961114.226684e-08
1.332231.6960244.339946e-08
1.338431.6959374.453735e-08
1.344651.695854.568053e-08
1.350911.6957634.682903e-08
1.357191.6956764.798287e-08
1.36351.6955884.914208e-08
1.369851.69555.030668e-08
1.376221.6954125.147670e-08
1.382621.6953245.265216e-08
1.389051.6952355.383308e-08
1.395511.6951475.501950e-08
1.41.6950855.584400e-08
1.4021.6950585.618013e-08
1.408521.6949685.727555e-08
1.415071.6948795.837607e-08
1.421661.6947895.948171e-08
1.428271.6946996.059250e-08
1.434911.6946096.170845e-08
1.441591.6945186.282959e-08
1.448291.6944286.395594e-08
1.455031.6943376.508754e-08
1.46181.6942456.622439e-08
1.468591.6941536.736654e-08
1.475431.6940616.851400e-08
1.482291.6939696.966679e-08
1.489181.6938767.082495e-08
1.496111.6937837.198849e-08
1.503071.6936897.315745e-08
1.510061.6935957.433184e-08
1.517081.6935017.551170e-08
1.524141.6934067.669704e-08
1.531231.6933117.788790e-08
1.538351.6932167.908429e-08
1.545511.693128.028625e-08
1.55271.6930248.149381e-08
1.559921.6929278.270697e-08
1.567171.692838.392579e-08
1.574461.6927328.515027e-08
1.581791.6926348.638044e-08
1.589141.6925358.761634e-08
1.596541.6924368.885799e-08
1.61.6923898.944000e-08
1.603961.6923369.311067e-08
1.611421.6922361.000240e-07
1.618921.6921361.069695e-07
1.626451.6920341.139473e-07
1.634011.6919331.209575e-07
1.641611.691831.280003e-07
1.649251.6917281.350759e-07
1.656921.6916241.421845e-07
1.664631.691521.493260e-07
1.672371.6914161.565008e-07
1.680151.6913111.637090e-07
1.687961.6912051.709507e-07
1.695811.6910991.782261e-07
1.70371.6909921.855353e-07
1.711631.6908841.928785e-07
1.719591.6907762.002559e-07
1.727591.6906672.076676e-07
1.735621.6905572.151138e-07
1.743691.6904472.225946e-07
1.751811.6903362.301102e-07
1.759951.6902242.376607e-07
1.768141.6901122.452464e-07
1.776361.6899992.528673e-07
1.784631.6898852.605237e-07
1.792931.689772.682158e-07
1.81.6896722.747700e-07
1.801271.6896552.769344e-07
1.809641.6895392.912533e-07
1.818061.6894223.056388e-07
1.826521.6893043.200912e-07
1.835011.6891853.346109e-07
1.843551.6890663.491981e-07
1.852121.6889463.638531e-07
1.860741.6888253.785763e-07
1.869391.6887033.933680e-07
1.878091.688584.082285e-07
1.886821.6884574.231581e-07
1.89561.6883324.381571e-07
1.904421.6882074.532259e-07
1.913281.688084.683648e-07
1.922181.6879534.835741e-07
1.931121.6878254.988542e-07
1.94011.6876955.142053e-07
1.949121.6875655.296278e-07
1.958191.6874345.451221e-07
1.96731.6873025.606884e-07
1.976451.6871695.763272e-07
1.985641.6870345.920387e-07
1.994881.6868996.078232e-07
21.6868246.165800e-07
2.004161.6867636.384735e-07
2.013481.6866256.875919e-07
2.022841.6864877.369389e-07
2.032251.6863477.865154e-07
2.04171.6862078.363224e-07
2.05121.6860658.863612e-07
2.060741.6859229.366327e-07
2.070331.6857789.871380e-07
2.079961.6856321.037878e-06
2.089631.6854861.088854e-06
2.099351.6853381.140068e-06
2.109121.6851891.191519e-06
2.118931.6850391.243210e-06
2.128781.6848871.295142e-06
2.138681.6847341.347314e-06
2.148631.684581.399730e-06
2.158621.6844251.452389e-06
2.168671.6842681.505294e-06
2.178751.684111.558444e-06
2.188891.6839511.611842e-06
2.199071.683791.665487e-06
2.21.6837751.670400e-06
2.20931.6836281.796415e-06
2.219571.6834641.935714e-06
2.22991.6832992.075661e-06
2.240271.6831332.216258e-06
2.250691.6829652.357509e-06
2.261161.6827962.499418e-06
2.271671.6826252.641986e-06
2.282241.6824522.785218e-06
2.292861.6822782.929116e-06
2.303521.6821033.073683e-06
2.314241.6819253.218922e-06
2.3251.6817473.364838e-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
—