Optical constants

Refractive index of H-TF8 (CDGM)

H-TF8: 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
1.72046
Extinction coefficient k
1.98319e-08
Permittivity ε1
2.95997
Permittivity ε2
6.82398e-08
Absorption coefficient α
0.00424123 cm⁻¹
Penetration depth δ = λ/(2πk)
4.71561e+09 nm
Abbe number Vd
34.758
Chromatic dispersion dn/dλ
-0.105048 µm⁻¹
Group index ng
1.78218
Group velocity dispersion
204.209 fs²/mm
Dispersion parameter D
-1114.07 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-TF8 (CDGM): H-TF8
cdgm_h_tf8 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-TF8", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_tf8.range_nm)  # (365, 2325) nm
eps = cdgm_h_tf8.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=1.6056299λ2λ2−0.0103174707+1.32554029λ2λ2−108.474162+0.265358825λ2λ2−0.0488739276

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.6056299
C30.0103174707
C41.32554029
C5108.474162
C60.265358825
C70.0488739276

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -1.81e-07 1.7e-08 -3.95e-11 7.69e-07 5.75e-10 0.256
nd
1.720460
Vd
34.757746
glass code
720348
glass status
preferred
density
value: 3510
thermal expansion
value: 7.1e-06, temperature range: 243 343; value: 8.8e-06, temperature range: 293 573
dPgF
-0.0014
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 1.20e-06 K⁻¹ at 633 nm, dn/dT = 1.57e-07 K⁻¹ at 1310 nm, dn/dT = 8.12e-08 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-TF8 (CDGM), H-TF8: n and k versus wavelength
λ (µm)nk
0.3651.7770471.080795e-06
0.3666981.7760359.921376e-07
0.3684031.7750399.030677e-07
0.371.7741258.196900e-07
0.3701171.7740588.162702e-07
0.3718381.7730937.659221e-07
0.3735681.7721427.153399e-07
0.3753061.7712066.645224e-07
0.3770511.7702846.134685e-07
0.3788051.7693765.621772e-07
0.381.7687675.272300e-07
0.3805671.7684815.178426e-07
0.3823371.76764.885361e-07
0.3841161.7667324.590933e-07
0.3859021.7658764.295136e-07
0.3876971.7650333.997962e-07
0.38951.7642023.699407e-07
0.391.7639753.616700e-07
0.3913121.7633833.481327e-07
0.3931321.7625763.293545e-07
0.3949611.761783.104889e-07
0.3967981.7609952.915356e-07
0.3986441.7602222.724942e-07
0.41.7596622.585000e-07
0.4004981.7594592.558962e-07
0.4023611.7587072.461526e-07
0.4042321.7579652.363637e-07
0.4061121.7572332.265292e-07
0.4080011.7565122.166490e-07
0.4098991.75582.067228e-07
0.4118061.7550981.967505e-07
0.4137211.7544051.867317e-07
0.4156451.7537221.766664e-07
0.4175791.7530471.665542e-07
0.4195211.7523821.563951e-07
0.421.752221.538900e-07
0.4214721.7517251.512110e-07
0.4234331.7510771.476440e-07
0.4254021.7504381.440605e-07
0.4273811.7498061.404602e-07
0.4293691.7491831.368433e-07
0.4313661.7485681.332095e-07
0.4333721.7479611.295588e-07
0.4353881.7473611.258911e-07
0.4374131.746771.222064e-07
0.4394481.7461851.185045e-07
0.441.7460291.175000e-07
0.4414921.7456081.156483e-07
0.4435451.7450391.130996e-07
0.4456091.7444761.105390e-07
0.4476811.743921.079665e-07
0.4497641.7433721.053820e-07
0.4518561.742831.027855e-07
0.4539571.7422941.001770e-07
0.4560691.7417659.755627e-08
0.458191.7412439.492338e-08
0.461.7408049.267700e-08
0.4603211.7407279.230278e-08
0.4624621.7402178.980882e-08
0.4646131.7397148.730326e-08
0.4667751.7392168.478604e-08
0.4689461.7387248.225712e-08
0.4711271.7382387.971643e-08
0.4733181.7377587.716393e-08
0.475521.7372847.459955e-08
0.4777321.7368157.202325e-08
0.4799541.7363526.943496e-08
0.481.7363426.938100e-08
0.4821861.7358946.837037e-08
0.4844291.7354416.733352e-08
0.4866821.7349946.629185e-08
0.4889461.7345526.524533e-08
0.491221.7341156.419394e-08
0.4935051.7336826.313767e-08
0.49581.7332556.207648e-08
0.4981071.7328336.101035e-08
0.51.7324916.013500e-08
0.5004231.7324155.981157e-08
0.5027511.7320035.803344e-08
0.5050891.7315945.624705e-08
0.5074391.7311915.445234e-08
0.5097991.7307925.264929e-08
0.512171.7303975.083785e-08
0.5145531.7300074.901798e-08
0.5169461.7296214.718965e-08
0.519351.7292394.535281e-08
0.5217661.7288624.350744e-08
0.5241931.7284894.165347e-08
0.5266311.7281193.979089e-08
0.5290811.7277543.791964e-08
0.5315421.7273933.603968e-08
0.5340141.7270363.415099e-08
0.5364981.7266823.225351e-08
0.5389931.7263323.034720e-08
0.54151.7259862.843202e-08
0.5440191.7256442.650794e-08
0.5465491.7253052.457491e-08
0.5490921.724972.263288e-08
0.551.7248522.193900e-08
0.5516461.7246392.184678e-08
0.5542121.7243112.170298e-08
0.5567891.7239862.155852e-08
0.5593791.7236652.141339e-08
0.5619811.7233472.126758e-08
0.5645951.7230332.112109e-08
0.5672211.7227222.097393e-08
0.5698591.7224132.082607e-08
0.572511.7221092.067754e-08
0.5751731.7218072.052830e-08
0.5778481.7215082.037838e-08
0.5805361.7212132.022776e-08
0.5832361.720922.007643e-08
0.5859491.720631.992441e-08
0.5886751.7203431.977167e-08
0.5914131.720061.961823e-08
0.5941641.7197791.946407e-08
0.5969271.71951.930920e-08
0.5997041.7192251.915360e-08
0.61.7191961.913700e-08
0.6024931.7189521.921653e-08
0.6052961.7186821.930593e-08
0.6081111.7184151.939574e-08
0.610941.718151.948597e-08
0.6137811.7178881.957662e-08
0.6166361.7176281.966769e-08
0.6195041.7173711.975919e-08
0.6223861.7171171.985111e-08
0.6252811.7168641.994346e-08
0.6281891.7166152.003623e-08
0.6311111.7163672.012944e-08
0.6340471.7161222.022308e-08
0.6369961.715882.031716e-08
0.6399591.7156392.041168e-08
0.6429351.7154012.050663e-08
0.6459261.7151652.060203e-08
0.648931.7149322.069787e-08
0.651.7148492.073200e-08
0.6519491.71472.057627e-08
0.6549811.7144712.033392e-08
0.6580281.7142442.009044e-08
0.6610881.7140191.984583e-08
0.6641631.7137961.960008e-08
0.6672521.7135751.935319e-08
0.6703561.7133561.910515e-08
0.6734741.7131391.885595e-08
0.6766071.7129241.860560e-08
0.6797541.712711.835408e-08
0.6829151.7124991.810139e-08
0.6860921.712291.784753e-08
0.6892831.7120821.759249e-08
0.6924891.7118771.733626e-08
0.695711.7116731.707884e-08
0.6989461.7114711.682022e-08
0.71.7114061.673600e-08
0.7021971.7112711.664831e-08
0.7054631.7110721.651795e-08
0.7087451.7108751.638700e-08
0.7120411.710681.625543e-08
0.7153531.7104871.612325e-08
0.7186811.7102951.599045e-08
0.7220231.7101051.585704e-08
0.7253821.7099161.572301e-08
0.7287561.7097291.558835e-08
0.7321461.7095431.545307e-08
0.7355511.709361.531716e-08
0.7389721.7091771.518062e-08
0.7424091.7089961.504344e-08
0.7458631.7088171.490562e-08
0.7493321.7086391.476716e-08
0.7528171.7084621.462806e-08
0.7563191.7082871.448831e-08
0.7598371.7081131.434791e-08
0.7633711.7079411.420686e-08
0.7669221.707771.406515e-08
0.7704891.70761.392279e-08
0.7740731.7074321.377976e-08
0.7776731.7072651.363606e-08
0.781291.7070991.349170e-08
0.7849241.7069351.334666e-08
0.7885751.7067721.320096e-08
0.7922431.706611.305457e-08
0.7959281.7064491.290750e-08
0.799631.7062891.275975e-08
0.81.7062741.274500e-08
0.803351.7061311.279840e-08
0.8070861.7059741.285796e-08
0.810841.7058181.291780e-08
0.8146121.7056631.297791e-08
0.8184011.7055091.303831e-08
0.8222081.7053561.309899e-08
0.8260321.7052051.315995e-08
0.8298741.7050541.322119e-08
0.8337341.7049051.328272e-08
0.8376121.7047561.334454e-08
0.8415081.7046091.340664e-08
0.8454221.7044621.346903e-08
0.8493551.7043171.353171e-08
0.851.7042931.354200e-08
0.8533051.7041721.359462e-08
0.8572741.7040291.365781e-08
0.8612621.7038861.372129e-08
0.8652681.7037441.378506e-08
0.8692921.7036031.384913e-08
0.8733361.7034641.391350e-08
0.8773981.7033251.397817e-08
0.8814791.7031861.404315e-08
0.8855791.7030491.410842e-08
0.8896981.7029131.417399e-08
0.8938361.7027771.423988e-08
0.8979941.7026421.430606e-08
0.91.7025781.433800e-08
0.9021711.7025081.437260e-08
0.9063671.7023751.443949e-08
0.9105831.7022431.450669e-08
0.9148181.7021111.457420e-08
0.9190731.701981.464203e-08
0.9233481.701851.471017e-08
0.9276431.7017211.477863e-08
0.9319581.7015921.484741e-08
0.9362931.7014641.491651e-08
0.9406481.7013361.498593e-08
0.9450231.701211.505567e-08
0.9494191.7010841.512573e-08
0.951.7010671.513500e-08
0.9538351.7009581.519605e-08
0.9582711.7008331.526668e-08
0.9627291.7007091.533764e-08
0.9672071.7005861.540893e-08
0.9717051.7004631.548055e-08
0.9762251.700341.555250e-08
0.9807661.7002181.562479e-08
0.9853281.7000971.569742e-08
0.9899111.6999761.577038e-08
0.9945151.6998561.584368e-08
0.9991411.6997371.591732e-08
11.6997151.593100e-08
1.003791.6996171.599136e-08
1.008461.6994991.606575e-08
1.013151.6993811.614049e-08
1.017861.6992631.621558e-08
1.022591.6991461.629101e-08
1.027351.6990291.636680e-08
1.032131.6989131.644293e-08
1.036931.6987971.651943e-08
1.041751.6986811.659628e-08
1.04661.6985661.667348e-08
1.051471.6984521.675105e-08
1.056361.6983371.682897e-08
1.061.6982531.688700e-08
1.061271.6982231.690726e-08
1.066211.698111.698593e-08
1.071171.6979971.706496e-08
1.076151.6978841.714435e-08
1.081151.6977711.722412e-08
1.086181.6976591.730426e-08
1.091241.6975471.738477e-08
1.096311.6974361.746565e-08
1.101411.6973241.754691e-08
1.106531.6972131.762855e-08
1.111681.6971021.771057e-08
1.116851.6969921.779297e-08
1.122051.6968821.787576e-08
1.127271.6967721.795892e-08
1.132511.6966621.804248e-08
1.137781.6965521.812642e-08
1.143071.6964431.821076e-08
1.148391.6963341.829549e-08
1.153731.6962251.838061e-08
1.159091.6961161.846612e-08
1.164481.6960071.855204e-08
1.16991.6958991.863835e-08
1.175341.695791.872507e-08
1.180811.6956821.881219e-08
1.18631.6955741.889971e-08
1.191821.6954661.898764e-08
1.197361.6953581.907598e-08
1.21.6953071.911800e-08
1.202931.695252.047952e-08
1.208531.6951422.307717e-08
1.214151.6950352.568689e-08
1.21981.6949272.830876e-08
1.225471.694823.094282e-08
1.231171.6947123.358913e-08
1.23691.6946043.624776e-08
1.242651.6944973.891874e-08
1.248431.6943894.160216e-08
1.254241.6942824.429805e-08
1.260071.6941754.700648e-08
1.265931.6940674.972751e-08
1.271821.6939595.246120e-08
1.277741.6938525.520760e-08
1.283681.6937445.796678e-08
1.289651.6936366.073879e-08
1.295651.6935296.352369e-08
1.301671.6934216.632155e-08
1.307731.6933136.913242e-08
1.313811.6932057.195637e-08
1.319921.6930977.479345e-08
1.326061.6929887.764372e-08
1.332231.692888.050726e-08
1.338431.6927718.338411e-08
1.344651.6926638.627435e-08
1.350911.6925548.917802e-08
1.357191.6924459.209521e-08
1.36351.6923359.502596e-08
1.369851.6922269.797035e-08
1.376221.6921161.009284e-07
1.382621.6920061.039003e-07
1.389051.6918961.068859e-07
1.395511.6917861.098855e-07
1.41.6917091.119700e-07
1.4021.6916751.121300e-07
1.408521.6915641.126513e-07
1.415071.6914531.131751e-07
1.421661.6913421.137014e-07
1.428271.691231.142300e-07
1.434911.6911181.147612e-07
1.441591.6910061.152948e-07
1.448291.6908931.158309e-07
1.455031.690781.163695e-07
1.46181.6906671.169105e-07
1.468591.6905531.174541e-07
1.475431.6904391.180003e-07
1.482291.6903241.185490e-07
1.489181.690211.191002e-07
1.496111.6900941.196540e-07
1.503071.6899791.202103e-07
1.510061.6898631.207693e-07
1.517081.6897461.213308e-07
1.524141.6896291.218950e-07
1.531231.6895121.224618e-07
1.538351.6893941.230312e-07
1.545511.6892761.236033e-07
1.55271.6891571.241780e-07
1.559921.6890371.247554e-07
1.567171.6889171.253355e-07
1.574461.6887971.259183e-07
1.581791.6886761.265038e-07
1.589141.6885551.270920e-07
1.596541.6884331.276830e-07
1.61.6883751.279600e-07
1.603961.688311.311571e-07
1.611421.6881871.371785e-07
1.618921.6880631.432279e-07
1.626451.6879391.493055e-07
1.634011.6878141.554113e-07
1.641611.6876881.615456e-07
1.649251.6875621.677083e-07
1.656921.6874351.738997e-07
1.664631.6873071.801200e-07
1.672371.6871791.863691e-07
1.680151.687051.926473e-07
1.687961.686921.989548e-07
1.695811.686792.052915e-07
1.70371.6866582.116578e-07
1.711631.6865262.180536e-07
1.719591.6863942.244792e-07
1.727591.686262.309347e-07
1.735621.6861262.374202e-07
1.743691.6859912.439359e-07
1.751811.6858552.504819e-07
1.759951.6857182.570583e-07
1.768141.6855812.636653e-07
1.776361.6854422.703031e-07
1.784631.6853032.769717e-07
1.792931.6851632.836713e-07
1.81.6850432.893800e-07
1.801271.6850222.914519e-07
1.809641.684883.051588e-07
1.818061.6847373.189294e-07
1.826521.6845933.327641e-07
1.835011.6844483.466631e-07
1.843551.6843023.606268e-07
1.852121.6841563.746554e-07
1.860741.6840083.887493e-07
1.869391.6838594.029087e-07
1.878091.6837094.171340e-07
1.886821.6835584.314255e-07
1.89561.6834064.457834e-07
1.904421.6832534.602082e-07
1.913281.6830994.747000e-07
1.922181.6829444.892592e-07
1.931121.6827885.038861e-07
1.94011.682635.185811e-07
1.949121.6824715.333444e-07
1.958191.6823125.481764e-07
1.96731.6821515.630774e-07
1.976451.6819885.780477e-07
1.985641.6818255.930876e-07
1.994881.681666.081975e-07
21.6815686.165800e-07
2.004161.6814946.486160e-07
2.013481.6813277.204894e-07
2.022841.6811587.926972e-07
2.032251.6809888.652408e-07
2.04171.6808179.381219e-07
2.05121.6806441.011342e-06
2.060741.680471.084903e-06
2.070331.6802951.158805e-06
2.079961.6801181.233052e-06
2.089631.679941.307644e-06
2.099351.679761.382582e-06
2.109121.6795791.457870e-06
2.118931.6793971.533507e-06
2.128781.6792121.609497e-06
2.138681.6790271.685840e-06
2.148631.678841.762538e-06
2.158621.6786511.839592e-06
2.168671.678461.917005e-06
2.178751.6782681.994778e-06
2.188891.6780752.072913e-06
2.199071.6778792.151412e-06
2.21.6778622.158600e-06
2.20931.6776822.286833e-06
2.219571.6774842.428582e-06
2.22991.6772832.570991e-06
2.240271.6770812.714062e-06
2.250691.6768772.857799e-06
2.261161.6766723.002204e-06
2.271671.6764643.147281e-06
2.282241.6762553.293032e-06
2.292861.6760443.439462e-06
2.303521.675833.586573e-06
2.314241.6756153.734368e-06
2.3251.6753983.882850e-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
—