Optical constants

Refractive index of H-BAF4 (CDGM)

H-BAF4: 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
1.58267
Extinction coefficient k
2.34385e-08
Permittivity ε1
2.50484
Permittivity ε2
7.41907e-08
Absorption coefficient α
0.00501254 cm⁻¹
Penetration depth δ = λ/(2πk)
3.98999e+09 nm
Abbe number Vd
46.598
Chromatic dispersion dn/dλ
-0.0638991 µm⁻¹
Group index ng
1.62021
Group velocity dispersion
118.98 fs²/mm
Dispersion parameter D
-649.096 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-BAF4 (CDGM): H-BAF4
cdgm_h_baf4 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-BAF4", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_baf4.range_nm)  # (365, 2325) nm
eps = cdgm_h_baf4.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=1.32811418λ2λ2−0.0086851075+0.126865199λ2λ2−0.0440786174+1.04004826λ2λ2−120.899619

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.32811418
C30.0086851075
C40.126865199
C50.0440786174
C61.04004826
C7120.899619

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -2.53e-06 1.58e-08 -4.13e-11 6.35e-07 4.85e-10 0.235
nd
1.582670
Vd
46.597786
glass code
583466
density
value: 2910
thermal expansion
value: 8.2e-06, temperature range: 243 343; value: 1e-05, temperature range: 293 573
dPgF
0.0005
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -3.28e-07 K⁻¹ at 633 nm, dn/dT = -9.95e-07 K⁻¹ at 1310 nm, dn/dT = -1.04e-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-BAF4 (CDGM), H-BAF4: n and k versus wavelength
λ (µm)nk
0.3651.6152968.498750e-07
0.3666981.6147427.179185e-07
0.3684031.6141975.853482e-07
0.371.6136954.612500e-07
0.3701171.6136584.582708e-07
0.3718381.6131274.144095e-07
0.3735681.6126033.703442e-07
0.3753061.6120873.260739e-07
0.3770511.6115772.815977e-07
0.3788051.6110742.369146e-07
0.381.6107362.064700e-07
0.3805671.6105772.006678e-07
0.3823371.6100871.825539e-07
0.3841161.6096041.643558e-07
0.3859021.6091261.460730e-07
0.3876971.6086551.277052e-07
0.38951.608191.092520e-07
0.391.6080631.041400e-07
0.3913121.6077319.848744e-08
0.3931321.6072789.064654e-08
0.3949611.6068318.276916e-08
0.3967981.6063897.485515e-08
0.3986441.6059536.690432e-08
0.41.6056376.106100e-08
0.4004981.6055236.037727e-08
0.4023611.6050975.781865e-08
0.4042321.6046775.524813e-08
0.4061121.6042635.266565e-08
0.4080011.6038535.007116e-08
0.4098991.6034484.746460e-08
0.4118061.6030494.484592e-08
0.4137211.6026544.221505e-08
0.4156451.6022643.957195e-08
0.4175791.6018783.691656e-08
0.4195211.6014983.424882e-08
0.421.6014053.359100e-08
0.4214721.6011213.344847e-08
0.4234331.600753.325870e-08
0.4254021.6003833.306805e-08
0.4273811.600023.287652e-08
0.4293691.5996613.268409e-08
0.4313661.5993073.249077e-08
0.4333721.5989563.229654e-08
0.4353881.598613.210142e-08
0.4374131.5982683.190539e-08
0.4394481.597933.170844e-08
0.441.5978393.165500e-08
0.4414921.5975963.121182e-08
0.4435451.5972653.060182e-08
0.4456091.5969392.998898e-08
0.4476811.5966162.937330e-08
0.4497641.5962962.875475e-08
0.4518561.5959812.813332e-08
0.4539571.5956692.750900e-08
0.4560691.595362.688178e-08
0.458191.5950552.625164e-08
0.461.5947992.571400e-08
0.4603211.5947532.560849e-08
0.4624621.5944552.490535e-08
0.4646131.594162.419894e-08
0.4667751.5938682.348925e-08
0.4689461.593582.277625e-08
0.4711271.5932952.205994e-08
0.4733181.5930122.134029e-08
0.475521.5927332.061730e-08
0.4777321.5924571.989095e-08
0.4799541.5921841.916121e-08
0.481.5921781.914600e-08
0.4821861.5919141.923323e-08
0.4844291.5916471.932271e-08
0.4866821.5913821.941262e-08
0.4889461.5911211.950294e-08
0.491221.5908621.959368e-08
0.4935051.5906061.968485e-08
0.49581.5903531.977644e-08
0.4981071.5901021.986845e-08
0.51.5898991.994400e-08
0.5004231.5898541.996089e-08
0.5027511.5896092.005377e-08
0.5050891.5893662.014707e-08
0.5074391.5891262.024081e-08
0.5097991.5888892.033498e-08
0.512171.5886532.042960e-08
0.5145531.5884212.052465e-08
0.5169461.588192.062014e-08
0.519351.5879622.071608e-08
0.5217661.5877372.081247e-08
0.5241931.5875132.090930e-08
0.5266311.5872922.100659e-08
0.5290811.5870732.110432e-08
0.5315421.5868572.120251e-08
0.5340141.5866422.130116e-08
0.5364981.586432.140027e-08
0.5389931.586222.149983e-08
0.54151.5860122.159987e-08
0.5440191.5858062.170036e-08
0.5465491.5856022.180133e-08
0.5490921.5854012.190276e-08
0.551.5853292.193900e-08
0.5516461.5852012.200463e-08
0.5542121.5850032.210696e-08
0.5567891.5848072.220976e-08
0.5593791.5846132.231304e-08
0.5619811.5844212.241680e-08
0.5645951.5842312.252105e-08
0.5672211.5840422.262578e-08
0.5698591.5838562.273100e-08
0.572511.5836712.283670e-08
0.5751731.5834882.294290e-08
0.5778481.5833072.304959e-08
0.5805361.5831272.315678e-08
0.5832361.582952.326447e-08
0.5859491.5827732.337265e-08
0.5886751.5825992.348134e-08
0.5914131.5824262.359054e-08
0.5941641.5822552.370024e-08
0.5969271.5820862.381046e-08
0.5997041.5819182.392119e-08
0.61.58192.393300e-08
0.6024931.5817512.377339e-08
0.6052961.5815862.359398e-08
0.6081111.5814232.341373e-08
0.610941.5812612.323265e-08
0.6137811.5811012.305073e-08
0.6166361.5809422.286796e-08
0.6195041.5807852.268434e-08
0.6223861.5806292.249986e-08
0.6252811.5804742.231453e-08
0.6281891.5803212.212833e-08
0.6311111.5801692.194127e-08
0.6340471.5800192.175334e-08
0.6369961.5798692.156454e-08
0.6399591.5797222.137485e-08
0.6429351.5795752.118429e-08
0.6459261.579432.099283e-08
0.648931.5792862.080049e-08
0.651.5792352.073200e-08
0.6519491.5791432.079412e-08
0.6549811.5790022.089079e-08
0.6580281.5788622.098792e-08
0.6610881.5787232.108549e-08
0.6641631.5785852.118352e-08
0.6672521.5784482.128201e-08
0.6703561.5783132.138095e-08
0.6734741.5781782.148035e-08
0.6766071.5780452.158022e-08
0.6797541.5779132.168055e-08
0.6829151.5777822.178135e-08
0.6860921.5776522.188261e-08
0.6892831.5775232.198435e-08
0.6924891.5773962.208656e-08
0.695711.5772692.218924e-08
0.6989461.5771432.229241e-08
0.71.5771032.232600e-08
0.7021971.5770192.239609e-08
0.7054631.5768952.250028e-08
0.7087451.5767722.260496e-08
0.7120411.5766512.271012e-08
0.7153531.576532.281577e-08
0.7186811.576412.292191e-08
0.7220231.5762912.302855e-08
0.7253821.5761732.313568e-08
0.7287561.5760562.324331e-08
0.7321461.575942.335144e-08
0.7355511.5758252.346008e-08
0.7389721.5757112.356922e-08
0.7424091.5755972.367886e-08
0.7458631.5754852.378902e-08
0.7493321.5753732.389969e-08
0.7528171.5752622.401087e-08
0.7563191.5751522.412257e-08
0.7598371.5750432.423479e-08
0.7633711.5749342.434754e-08
0.7669221.5748262.446080e-08
0.7704891.5747192.457460e-08
0.7740731.5746132.468892e-08
0.7776731.5745082.480378e-08
0.781291.5744032.491916e-08
0.7849241.5742992.503509e-08
0.7885751.5741962.515156e-08
0.7922431.5740932.526856e-08
0.7959281.5739922.538611e-08
0.799631.573892.550421e-08
0.81.573882.551600e-08
0.803351.573792.471379e-08
0.8070861.573692.381894e-08
0.810841.5735912.291993e-08
0.8146121.5734932.201673e-08
0.8184011.5733952.110933e-08
0.8222081.5732972.019772e-08
0.8260321.5732011.928186e-08
0.8298741.5731051.836174e-08
0.8337341.5730091.743734e-08
0.8376121.5729151.650865e-08
0.8415081.572821.557563e-08
0.8454221.5727271.463827e-08
0.8493551.5726341.369656e-08
0.851.5726181.354200e-08
0.8533051.5725411.359462e-08
0.8572741.5724491.365781e-08
0.8612621.5723581.372129e-08
0.8652681.5722671.378506e-08
0.8692921.5721761.384913e-08
0.8733361.5720861.391350e-08
0.8773981.5719971.397817e-08
0.8814791.5719081.404315e-08
0.8855791.571821.410842e-08
0.8896981.5717321.417399e-08
0.8938361.5716441.423988e-08
0.8979941.5715571.430606e-08
0.91.5715151.433800e-08
0.9021711.571471.437260e-08
0.9063671.5713841.443949e-08
0.9105831.5712981.450669e-08
0.9148181.5712131.457420e-08
0.9190731.5711281.464203e-08
0.9233481.5710441.471017e-08
0.9276431.570961.477863e-08
0.9319581.5708761.484741e-08
0.9362931.5707931.491651e-08
0.9406481.570711.498593e-08
0.9450231.5706271.505567e-08
0.9494191.5705451.512573e-08
0.951.5705341.513500e-08
0.9538351.5704631.519605e-08
0.9582711.5703811.526668e-08
0.9627291.57031.533764e-08
0.9672071.5702191.540893e-08
0.9717051.5701391.548055e-08
0.9762251.5700581.555250e-08
0.9807661.5699781.562479e-08
0.9853281.5698991.569742e-08
0.9899111.5698191.577038e-08
0.9945151.569741.584368e-08
0.9991411.5696611.591732e-08
11.5696471.593100e-08
1.003791.5695831.599136e-08
1.008461.5695041.606575e-08
1.013151.5694261.614049e-08
1.017861.5693491.621558e-08
1.022591.5692711.629101e-08
1.027351.5691941.636680e-08
1.032131.5691161.644293e-08
1.036931.569041.651943e-08
1.041751.5689631.659628e-08
1.04661.5688861.667348e-08
1.051471.568811.675105e-08
1.056361.5687341.682897e-08
1.061.5686771.688700e-08
1.061271.5686581.690726e-08
1.066211.5685821.698593e-08
1.071171.5685061.706496e-08
1.076151.5684311.714435e-08
1.081151.5683561.722412e-08
1.086181.568281.730426e-08
1.091241.5682051.738477e-08
1.096311.568131.746565e-08
1.101411.5680561.754691e-08
1.106531.5679811.762855e-08
1.111681.5679061.771057e-08
1.116851.5678321.779297e-08
1.122051.5677571.787576e-08
1.127271.5676831.795892e-08
1.132511.5676091.804248e-08
1.137781.5675351.812642e-08
1.143071.5674611.821076e-08
1.148391.5673871.829549e-08
1.153731.5673131.838061e-08
1.159091.5672391.846612e-08
1.164481.5671651.855204e-08
1.16991.5670911.863835e-08
1.175341.5670171.872507e-08
1.180811.5669431.881219e-08
1.18631.5668691.889971e-08
1.191821.5667961.898764e-08
1.197361.5667221.907598e-08
1.21.5666871.911800e-08
1.202931.5666481.998522e-08
1.208531.5665742.163979e-08
1.214151.56652.330205e-08
1.21981.5664262.497205e-08
1.225471.5663522.664981e-08
1.231171.5662782.833538e-08
1.23691.5662043.002878e-08
1.242651.566133.173007e-08
1.248431.5660563.343926e-08
1.254241.5659823.515641e-08
1.260071.5659073.688154e-08
1.265931.5658333.861470e-08
1.271821.5657584.035592e-08
1.277741.5656844.210524e-08
1.283681.5656094.386269e-08
1.289651.5655344.562832e-08
1.295651.5654594.740217e-08
1.301671.5653844.918426e-08
1.307731.5653095.097464e-08
1.313811.5652345.277335e-08
1.319921.5651585.458043e-08
1.326061.5650825.639591e-08
1.332231.5650075.821983e-08
1.338431.5649316.005224e-08
1.344651.5648546.189318e-08
1.350911.5647786.374267e-08
1.357191.5647026.560077e-08
1.36351.5646256.746751e-08
1.369851.5645486.934293e-08
1.376221.5644717.122708e-08
1.382621.5643937.311999e-08
1.389051.5643167.502171e-08
1.395511.5642387.693227e-08
1.41.5641847.826000e-08
1.4021.564167.862868e-08
1.408521.5640817.983021e-08
1.415071.5640038.103732e-08
1.421661.5639248.225005e-08
1.428271.5638458.346842e-08
1.434911.5637658.469246e-08
1.441591.5636858.592219e-08
1.448291.5636058.715764e-08
1.455031.5635258.839883e-08
1.46181.5634448.964580e-08
1.468591.5633639.089857e-08
1.475431.5632829.215717e-08
1.482291.5632019.342162e-08
1.489181.5631199.469195e-08
1.496111.5630369.596819e-08
1.503071.5629549.725037e-08
1.510061.5628719.853851e-08
1.517081.5627879.983265e-08
1.524141.5627031.011328e-07
1.531231.5626191.024390e-07
1.538351.5625351.037513e-07
1.545511.562451.050697e-07
1.55271.5623641.063942e-07
1.559921.5622791.077248e-07
1.567171.5621921.090617e-07
1.574461.5621061.104048e-07
1.581791.5620181.117541e-07
1.589141.5619311.131097e-07
1.596541.5618431.144716e-07
1.61.5618021.151100e-07
1.603961.5617541.220570e-07
1.611421.5616651.351409e-07
1.618921.5615761.482858e-07
1.626451.5614861.614917e-07
1.634011.5613951.747591e-07
1.641611.5613041.880881e-07
1.649251.5612132.014792e-07
1.656921.5611212.149326e-07
1.664631.5610282.284485e-07
1.672371.5609352.420273e-07
1.680151.5608412.556693e-07
1.687961.5607472.693747e-07
1.695811.5606522.831439e-07
1.70371.5605572.969771e-07
1.711631.5604613.108747e-07
1.719591.5603643.248369e-07
1.727591.5602673.388640e-07
1.735621.5601693.529564e-07
1.743691.560073.671143e-07
1.751811.5599713.813381e-07
1.759951.5598713.956281e-07
1.768141.5597714.099845e-07
1.776361.559674.244077e-07
1.784631.5595684.388979e-07
1.792931.5594654.534556e-07
1.81.5593784.658600e-07
1.801271.5593624.693607e-07
1.809641.5592584.925199e-07
1.818061.5591535.157869e-07
1.826521.5590485.391621e-07
1.835011.5589425.626460e-07
1.843551.5588355.862392e-07
1.852121.5587276.099421e-07
1.860741.5586196.337552e-07
1.869391.5585096.576792e-07
1.878091.5583996.817143e-07
1.886821.5582887.058613e-07
1.89561.5581777.301206e-07
1.904421.5580647.544928e-07
1.913281.5579517.789783e-07
1.922181.5578368.035776e-07
1.931121.5577218.282915e-07
1.94011.5576058.531202e-07
1.949121.5574888.780645e-07
1.958191.557379.031247e-07
1.96731.5572529.283016e-07
1.976451.5571329.535955e-07
1.985641.5570119.790071e-07
1.994881.556891.004537e-06
21.5568221.018700e-06
2.004161.5567671.048606e-06
2.013481.5566441.115701e-06
2.022841.5565191.183108e-06
2.032251.5563941.250829e-06
2.04171.5562671.318864e-06
2.05121.5561391.387216e-06
2.060741.5560111.455886e-06
2.070331.5558811.524876e-06
2.079961.555751.594186e-06
2.089631.5556181.663819e-06
2.099351.5554851.733775e-06
2.109121.5553511.804057e-06
2.118931.5552161.874666e-06
2.128781.555081.945603e-06
2.138681.5549422.016871e-06
2.148631.5548042.088469e-06
2.158621.5546642.160401e-06
2.168671.5545232.232667e-06
2.178751.554382.305270e-06
2.188891.5542372.378210e-06
2.199071.5540922.451490e-06
2.21.5540792.458200e-06
2.20931.5539462.507215e-06
2.219571.5537982.561396e-06
2.22991.553652.615829e-06
2.240271.55352.670515e-06
2.250691.5533482.725456e-06
2.261161.5531962.780652e-06
2.271671.5530422.836105e-06
2.282241.5528862.891816e-06
2.292861.5527292.947786e-06
2.303521.5525713.004016e-06
2.314241.5524113.060508e-06
2.3251.552253.117262e-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
—