Optical constants

Refractive index of H-BAF2 (CDGM)

H-BAF2: 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
1.5697
Extinction coefficient k
1.87414e-08
Permittivity ε1
2.46395
Permittivity ε2
5.88368e-08
Absorption coefficient α
0.00400803 cm⁻¹
Penetration depth δ = λ/(2πk)
4.98998e+09 nm
Abbe number Vd
49.453
Chromatic dispersion dn/dλ
-0.0590154 µm⁻¹
Group index ng
1.60438
Group velocity dispersion
108.228 fs²/mm
Dispersion parameter D
-590.443 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-BAF2 (CDGM): H-BAF2
cdgm_h_baf2 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-BAF2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_baf2.range_nm)  # (365, 2325) nm
eps = cdgm_h_baf2.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=0.131856447λ2λ2−0.0404229746+1.28686729λ2λ2−0.0080740739+1.0068252λ2λ2−113.574742

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C20.131856447
C30.0404229746
C41.28686729
C50.0080740739
C61.0068252
C7113.574742

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -2.16e-06 1.57e-08 -3.1e-11 4.71e-07 6.41e-10 0.268
nd
1.569700
Vd
49.452646
glass code
570495
density
value: 2820
thermal expansion
value: 8.2e-06, temperature range: 243 343; value: 9.8e-06, temperature range: 293 573
dPgF
0.0002
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -3.38e-07 K⁻¹ at 633 nm, dn/dT = -8.52e-07 K⁻¹ at 1310 nm, dn/dT = -8.86e-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-BAF2 (CDGM), H-BAF2: n and k versus wavelength
λ (µm)nk
0.3651.5993746.309450e-07
0.3666981.5988785.377172e-07
0.3684031.5983894.440559e-07
0.371.5979393.563800e-07
0.3701171.5979063.541757e-07
0.3718381.597433.217230e-07
0.3735681.5969592.891194e-07
0.3753061.5964952.563641e-07
0.3770511.5960372.234565e-07
0.3788051.5955841.903958e-07
0.381.5952811.678700e-07
0.3805671.5951381.631682e-07
0.3823371.5946971.484896e-07
0.3841161.5942611.337428e-07
0.3859021.5938311.189274e-07
0.3876971.5934071.040430e-07
0.38951.5929878.908948e-08
0.391.5928728.494700e-08
0.3913121.5925738.053743e-08
0.3931321.5921647.442073e-08
0.3949611.591766.827558e-08
0.3967981.5913616.210184e-08
0.3986441.5909675.589939e-08
0.41.5906825.134100e-08
0.4004981.5905785.073132e-08
0.4023611.5901934.844979e-08
0.4042321.5898134.615766e-08
0.4061121.5894374.385486e-08
0.4080011.5890674.154136e-08
0.4098991.58873.921709e-08
0.4118061.5883383.688201e-08
0.4137211.587983.453607e-08
0.4156451.5876263.217922e-08
0.4175791.5872772.981140e-08
0.4195211.5869312.743257e-08
0.421.5868472.684600e-08
0.4214721.586592.668036e-08
0.4234331.5862522.645981e-08
0.4254021.5859192.623824e-08
0.4273811.5855892.601564e-08
0.4293691.5852632.579200e-08
0.4313661.5849412.556732e-08
0.4333721.5846222.534160e-08
0.4353881.5843072.511482e-08
0.4374131.5839962.488700e-08
0.4394481.5836882.465811e-08
0.441.5836052.459600e-08
0.4414921.5833842.440458e-08
0.4435451.5830832.414112e-08
0.4456091.5827852.387642e-08
0.4476811.5824912.361050e-08
0.4497641.58222.334334e-08
0.4518561.5819122.307494e-08
0.4539571.5816272.280528e-08
0.4560691.5813462.253438e-08
0.458191.5810672.226221e-08
0.461.5808332.203000e-08
0.4603211.5807922.198367e-08
0.4624621.5805192.167492e-08
0.4646131.580252.136474e-08
0.4667751.5799842.105311e-08
0.4689461.579722.074004e-08
0.4711271.5794592.042551e-08
0.4733181.5792012.010951e-08
0.475521.5789461.979205e-08
0.4777321.5786931.947311e-08
0.4799541.5784441.915268e-08
0.481.5784381.914600e-08
0.4821861.5781961.923323e-08
0.4844291.5779521.932271e-08
0.4866821.577711.941262e-08
0.4889461.577471.950294e-08
0.491221.5772331.959368e-08
0.4935051.5769991.968485e-08
0.49581.5767671.977644e-08
0.4981071.5765371.986845e-08
0.51.5763511.994400e-08
0.5004231.576311.992366e-08
0.5027511.5760851.981184e-08
0.5050891.5758621.969950e-08
0.5074391.5756421.958664e-08
0.5097991.5754241.947325e-08
0.512171.5752081.935934e-08
0.5145531.5749941.924489e-08
0.5169461.5747831.912992e-08
0.519351.5745741.901441e-08
0.5217661.5743661.889836e-08
0.5241931.5741611.878177e-08
0.5266311.5739581.866464e-08
0.5290811.5737571.854696e-08
0.5315421.5735581.842874e-08
0.5340141.5733611.830997e-08
0.5364981.5731661.819064e-08
0.5389931.5729721.807076e-08
0.54151.5727811.795032e-08
0.5440191.5725911.782932e-08
0.5465491.5724041.770776e-08
0.5490921.5722181.758564e-08
0.551.5721521.754200e-08
0.5516461.5720341.759450e-08
0.5542121.5718521.767635e-08
0.5567891.5716711.775858e-08
0.5593791.5714921.784120e-08
0.5619811.5713151.792420e-08
0.5645951.571141.800758e-08
0.5672211.5709661.809135e-08
0.5698591.5707941.817552e-08
0.572511.5706241.826007e-08
0.5751731.5704551.834502e-08
0.5778481.5702881.843036e-08
0.5805361.5701221.851610e-08
0.5832361.5699581.860224e-08
0.5859491.5697961.868878e-08
0.5886751.5696351.877572e-08
0.5914131.5694751.886307e-08
0.5941641.5693171.895082e-08
0.5969271.569161.903898e-08
0.5997041.5690051.912755e-08
0.61.5689881.913700e-08
0.6024931.5688511.921653e-08
0.6052961.5686991.930593e-08
0.6081111.5685471.939574e-08
0.610941.5683981.948597e-08
0.6137811.5682491.957662e-08
0.6166361.5681021.966769e-08
0.6195041.5679571.975919e-08
0.6223861.5678121.985111e-08
0.6252811.5676691.994346e-08
0.6281891.5675272.003623e-08
0.6311111.5673862.012944e-08
0.6340471.5672472.022308e-08
0.6369961.5671092.031716e-08
0.6399591.5669722.041168e-08
0.6429351.5668362.050663e-08
0.6459261.5667012.060203e-08
0.648931.5665672.069787e-08
0.651.566522.073200e-08
0.6519491.5664352.057627e-08
0.6549811.5663042.033392e-08
0.6580281.5661742.009044e-08
0.6610881.5660441.984583e-08
0.6641631.5659161.960008e-08
0.6672521.5657891.935319e-08
0.6703561.5656631.910515e-08
0.6734741.5655391.885595e-08
0.6766071.5654151.860560e-08
0.6797541.5652921.835408e-08
0.6829151.565171.810139e-08
0.6860921.5650491.784753e-08
0.6892831.5649291.759249e-08
0.6924891.564811.733626e-08
0.695711.5646921.707884e-08
0.6989461.5645751.682022e-08
0.71.5645371.673600e-08
0.7021971.5644591.664831e-08
0.7054631.5643441.651795e-08
0.7087451.5642291.638700e-08
0.7120411.5641161.625543e-08
0.7153531.5640031.612325e-08
0.7186811.5638911.599045e-08
0.7220231.563781.585704e-08
0.7253821.563671.572301e-08
0.7287561.5635611.558835e-08
0.7321461.5634521.545307e-08
0.7355511.5633451.531716e-08
0.7389721.5632381.518062e-08
0.7424091.5631321.504344e-08
0.7458631.5630261.490562e-08
0.7493321.5629221.476716e-08
0.7528171.5628181.462806e-08
0.7563191.5627151.448831e-08
0.7598371.5626131.434791e-08
0.7633711.5625111.420686e-08
0.7669221.562411.406515e-08
0.7704891.562311.392279e-08
0.7740731.562211.377976e-08
0.7776731.5621111.363606e-08
0.781291.5620131.349170e-08
0.7849241.5619151.334666e-08
0.7885751.5618181.320096e-08
0.7922431.5617221.305457e-08
0.7959281.5616261.290750e-08
0.799631.5615311.275975e-08
0.81.5615221.274500e-08
0.803351.5614371.279840e-08
0.8070861.5613431.285796e-08
0.810841.5612491.291780e-08
0.8146121.5611571.297791e-08
0.8184011.5610641.303831e-08
0.8222081.5609731.309899e-08
0.8260321.5608821.315995e-08
0.8298741.5607911.322119e-08
0.8337341.5607011.328272e-08
0.8376121.5606121.334454e-08
0.8415081.5605231.340664e-08
0.8454221.5604341.346903e-08
0.8493551.5603461.353171e-08
0.851.5603321.354200e-08
0.8533051.5602591.359462e-08
0.8572741.5601721.365781e-08
0.8612621.5600851.372129e-08
0.8652681.5599991.378506e-08
0.8692921.5599141.384913e-08
0.8733361.5598281.391350e-08
0.8773981.5597441.397817e-08
0.8814791.5596591.404315e-08
0.8855791.5595751.410842e-08
0.8896981.5594921.417399e-08
0.8938361.5594091.423988e-08
0.8979941.5593261.430606e-08
0.91.5592861.433800e-08
0.9021711.5592441.437260e-08
0.9063671.5591621.443949e-08
0.9105831.559081.450669e-08
0.9148181.5589991.457420e-08
0.9190731.5589181.464203e-08
0.9233481.5588381.471017e-08
0.9276431.5587581.477863e-08
0.9319581.5586781.484741e-08
0.9362931.5585981.491651e-08
0.9406481.5585191.498593e-08
0.9450231.558441.505567e-08
0.9494191.5583621.512573e-08
0.951.5583511.513500e-08
0.9538351.5582831.519605e-08
0.9582711.5582051.526668e-08
0.9627291.5581281.533764e-08
0.9672071.558051.540893e-08
0.9717051.5579731.548055e-08
0.9762251.5578961.555250e-08
0.9807661.5578191.562479e-08
0.9853281.5577431.569742e-08
0.9899111.5576671.577038e-08
0.9945151.5575911.584368e-08
0.9991411.5575151.591732e-08
11.5575011.593100e-08
1.003791.557441.599136e-08
1.008461.5573641.606575e-08
1.013151.5572891.614049e-08
1.017861.5572141.621558e-08
1.022591.5571391.629101e-08
1.027351.5570651.636680e-08
1.032131.556991.644293e-08
1.036931.5569161.651943e-08
1.041751.5568421.659628e-08
1.04661.5567681.667348e-08
1.051471.5566941.675105e-08
1.056361.5566211.682897e-08
1.061.5565661.688700e-08
1.061271.5565471.690726e-08
1.066211.5564741.698593e-08
1.071171.5564011.706496e-08
1.076151.5563271.714435e-08
1.081151.5562541.722412e-08
1.086181.5561811.730426e-08
1.091241.5561091.738477e-08
1.096311.5560361.746565e-08
1.101411.5559631.754691e-08
1.106531.555891.762855e-08
1.111681.5558181.771057e-08
1.116851.5557451.779297e-08
1.122051.5556731.787576e-08
1.127271.55561.795892e-08
1.132511.5555281.804248e-08
1.137781.5554561.812642e-08
1.143071.5553831.821076e-08
1.148391.5553111.829549e-08
1.153731.5552391.838061e-08
1.159091.5551661.846612e-08
1.164481.5550941.855204e-08
1.16991.5550221.863835e-08
1.175341.5549491.872507e-08
1.180811.5548771.881219e-08
1.18631.5548041.889971e-08
1.191821.5547321.898764e-08
1.197361.5546591.907598e-08
1.21.5546251.911800e-08
1.202931.5545872.064463e-08
1.208531.5545142.355729e-08
1.214151.5544412.648349e-08
1.21981.5543692.942331e-08
1.225471.5542963.237680e-08
1.231171.5542233.534402e-08
1.23691.554153.832505e-08
1.242651.5540774.131995e-08
1.248431.5540044.432877e-08
1.254241.553934.735159e-08
1.260071.5538575.038847e-08
1.265931.5537835.343947e-08
1.271821.5537095.650467e-08
1.277741.5536355.958412e-08
1.283681.5535616.267790e-08
1.289651.5534876.578607e-08
1.295651.5534136.890869e-08
1.301671.5533387.204584e-08
1.307731.5532647.519758e-08
1.313811.5531897.836398e-08
1.319921.5531148.154511e-08
1.326061.5530398.474104e-08
1.332231.5529638.795183e-08
1.338431.5528879.117755e-08
1.344651.5528129.441828e-08
1.350911.5527359.767408e-08
1.357191.5526591.009450e-07
1.36351.5525821.042312e-07
1.369851.5525061.075326e-07
1.376221.5524281.108494e-07
1.382621.5523511.141817e-07
1.389051.5522731.175294e-07
1.395511.5521961.208927e-07
1.41.5521411.232300e-07
1.4021.5521171.231488e-07
1.408521.5520391.228840e-07
1.415071.551961.226180e-07
1.421661.5518811.223508e-07
1.428271.5518021.220823e-07
1.434911.5517221.218126e-07
1.441591.5516421.215416e-07
1.448291.5515611.212694e-07
1.455031.5514811.209959e-07
1.46181.55141.207211e-07
1.468591.5513181.204451e-07
1.475431.5512361.201677e-07
1.482291.5511541.198891e-07
1.489181.5510721.196092e-07
1.496111.5509891.193280e-07
1.503071.5509051.190454e-07
1.510061.5508221.187616e-07
1.517081.5507371.184764e-07
1.524141.5506531.181899e-07
1.531231.5505681.179021e-07
1.538351.5504821.176129e-07
1.545511.5503961.173224e-07
1.55271.550311.170306e-07
1.559921.5502231.167373e-07
1.567171.5501361.164428e-07
1.574461.5500481.161468e-07
1.581791.549961.158495e-07
1.589141.5498711.155508e-07
1.596541.5497821.152507e-07
1.61.549741.151100e-07
1.603961.5496921.208871e-07
1.611421.5496021.317675e-07
1.618921.5495111.426986e-07
1.626451.5494191.536805e-07
1.634011.5493271.647135e-07
1.641611.5492351.757979e-07
1.649251.5491421.869337e-07
1.656921.5490481.981214e-07
1.664631.5489542.093611e-07
1.672371.5488592.206531e-07
1.680151.5487632.319976e-07
1.687961.5486672.433949e-07
1.695811.5485712.548452e-07
1.70371.5484732.663488e-07
1.711631.5483752.779058e-07
1.719591.5482772.895166e-07
1.727591.5481773.011815e-07
1.735621.5480773.129006e-07
1.743691.5479773.246741e-07
1.751811.5478753.365025e-07
1.759951.5477733.483859e-07
1.768141.5476713.603245e-07
1.776361.5475673.723187e-07
1.784631.5474633.843686e-07
1.792931.5473583.964747e-07
1.81.5472684.067900e-07
1.801271.5472524.097022e-07
1.809641.5471464.289685e-07
1.818061.5470384.483244e-07
1.826521.546934.677704e-07
1.835011.5468214.873067e-07
1.843551.5467125.069340e-07
1.852121.5466015.266525e-07
1.860741.546495.464628e-07
1.869391.5463785.663652e-07
1.878091.5462655.863602e-07
1.886821.5461516.064481e-07
1.89561.5460366.266296e-07
1.904421.545926.469048e-07
1.913281.5458046.672744e-07
1.922181.5456866.877388e-07
1.931121.5455687.082983e-07
1.94011.5454487.289535e-07
1.949121.5453287.497047e-07
1.958191.5452077.705524e-07
1.96731.5450847.914972e-07
1.976451.5449618.125393e-07
1.985641.5448378.336793e-07
1.994881.5447128.549177e-07
21.5446428.667000e-07
2.004161.5445858.972605e-07
2.013481.5444589.658237e-07
2.022841.544331.034706e-06
2.032251.54421.103908e-06
2.04171.5440691.173433e-06
2.05121.5439381.243281e-06
2.060741.5438051.313453e-06
2.070331.5436711.383952e-06
2.079961.5435361.454779e-06
2.089631.54341.525936e-06
2.099351.5432621.597423e-06
2.109121.5431241.669243e-06
2.118931.5429841.741397e-06
2.128781.5428431.813887e-06
2.138681.5427011.886713e-06
2.148631.5425571.959879e-06
2.158621.5424132.033385e-06
2.168671.5422672.107232e-06
2.178751.5421192.181423e-06
2.188891.5419712.255960e-06
2.199071.5418212.330843e-06
2.21.5418072.337700e-06
2.20931.5416692.391246e-06
2.219571.5415172.450437e-06
2.22991.5413632.509903e-06
2.240271.5412072.569646e-06
2.250691.541052.629666e-06
2.261161.5408922.689966e-06
2.271671.5407322.750546e-06
2.282241.5405712.811408e-06
2.292861.5404092.872553e-06
2.303521.5402442.933983e-06
2.314241.5400792.995698e-06
2.3251.5399113.057700e-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
—