Optical constants

Refractive index of H-BAF8 (CDGM)

H-BAF8: 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
1.62604
Extinction coefficient k
3.75584e-08
Permittivity ε1
2.644
Permittivity ε2
1.22143e-07
Absorption coefficient α
0.00803221 cm⁻¹
Penetration depth δ = λ/(2πk)
2.48997e+09 nm
Abbe number Vd
39.072
Chromatic dispersion dn/dλ
-0.0813623 µm⁻¹
Group index ng
1.67385
Group velocity dispersion
156.588 fs²/mm
Dispersion parameter D
-854.269 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-BAF8 (CDGM): H-BAF8
cdgm_h_baf8 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-BAF8", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_baf8.range_nm)  # (365, 2325) nm
eps = cdgm_h_baf8.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=1.18828507λ2λ2−128.446962+1.43848614λ2λ2−0.0101637552+0.140002385λ2λ2−0.0524582573

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.18828507
C3128.446962
C41.43848614
C50.0101637552
C60.140002385
C70.0524582573

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -1.9e-06 1.29e-08 -7.27e-11 8.04e-07 1.1e-09 0.238
nd
1.626040
Vd
39.071631
glass code
626391
density
value: 2960
thermal expansion
value: 8.6e-06, temperature range: 243 343; value: 1.13e-05, temperature range: 293 573
dPgF
0.0019
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 2.20e-07 K⁻¹ at 633 nm, dn/dT = -6.95e-07 K⁻¹ at 1310 nm, dn/dT = -7.61e-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-BAF8 (CDGM), H-BAF8: n and k versus wavelength
λ (µm)nk
0.3651.6694292.342200e-06
0.3666981.6686571.953283e-06
0.3684031.6678971.562556e-06
0.371.66721.196800e-06
0.3701171.667151.188469e-06
0.3718381.6664131.065816e-06
0.3735681.6656889.425933e-07
0.3753061.6649748.187971e-07
0.3770511.6642716.944251e-07
0.3788051.6635785.694746e-07
0.381.6631134.843400e-07
0.3805671.6628954.707868e-07
0.3823371.6622234.284751e-07
0.3841161.661563.859665e-07
0.3859021.6609073.432603e-07
0.3876971.6602643.003554e-07
0.38951.6596292.572509e-07
0.391.6594562.453100e-07
0.3913121.6590042.310431e-07
0.3931321.6583882.112529e-07
0.3949611.657781.913707e-07
0.3967981.6571811.713960e-07
0.3986441.656591.513284e-07
0.41.6561631.365800e-07
0.4004981.6560071.350311e-07
0.4023611.6554331.292348e-07
0.4042321.6548661.234116e-07
0.4061121.6543071.175613e-07
0.4080011.6537551.116838e-07
0.4098991.6532111.057790e-07
0.4118061.6526749.984667e-08
0.4137211.6521449.388676e-08
0.4156451.6516228.789914e-08
0.4175791.6511068.188366e-08
0.4195211.6505977.584020e-08
0.421.6504737.435000e-08
0.4214721.6500947.329621e-08
0.4234331.6495987.189314e-08
0.4254021.6491097.048355e-08
0.4273811.6486266.906741e-08
0.4293691.6481486.764467e-08
0.4313661.6476776.621532e-08
0.4333721.6472126.477932e-08
0.4353881.6467536.333664e-08
0.4374131.64636.188726e-08
0.4394481.6458526.043113e-08
0.441.6457326.003600e-08
0.4414921.645415.913062e-08
0.4435451.6449735.788444e-08
0.4456091.6445415.663246e-08
0.4476811.6441155.537466e-08
0.4497641.6436945.411101e-08
0.4518561.6432795.284148e-08
0.4539571.6428685.156604e-08
0.4560691.6424625.028468e-08
0.458191.6420614.899735e-08
0.461.6417244.789900e-08
0.4603211.6416654.780826e-08
0.4624621.6412734.720350e-08
0.4646131.6408874.659593e-08
0.4667751.6405044.598554e-08
0.4689461.6401274.537230e-08
0.4711271.6397534.475622e-08
0.4733181.6393844.413727e-08
0.475521.639024.351544e-08
0.4777321.6386594.289071e-08
0.4799541.6383034.226309e-08
0.481.6382954.225000e-08
0.4821861.6379514.244238e-08
0.4844291.6376024.263974e-08
0.4866821.6372584.283803e-08
0.4889461.6369184.303724e-08
0.491221.6365824.323737e-08
0.4935051.6362494.343843e-08
0.49581.635924.364043e-08
0.4981071.6355954.384337e-08
0.51.6353324.401000e-08
0.5004231.6352734.393502e-08
0.5027511.6349554.352280e-08
0.5050891.6346414.310865e-08
0.5074391.634334.269259e-08
0.5097991.6340224.227458e-08
0.512171.6337184.185464e-08
0.5145531.6334174.143274e-08
0.5169461.633124.100887e-08
0.519351.6328254.058304e-08
0.5217661.6325344.015522e-08
0.5241931.6322463.972542e-08
0.5266311.6319613.929361e-08
0.5290811.6316793.885980e-08
0.5315421.6314013.842397e-08
0.5340141.6311253.798611e-08
0.5364981.6308523.754622e-08
0.5389931.6305823.710428e-08
0.54151.6303143.666028e-08
0.5440191.630053.621422e-08
0.5465491.6297883.576608e-08
0.5490921.629533.531586e-08
0.551.6294383.515500e-08
0.5516461.6292733.526019e-08
0.5542121.629023.542420e-08
0.5567891.6287693.558898e-08
0.5593791.628523.575452e-08
0.5619811.6282753.592083e-08
0.5645951.6280313.608791e-08
0.5672211.6277913.625578e-08
0.5698591.6275523.642442e-08
0.572511.6273163.659384e-08
0.5751731.6270833.676406e-08
0.5778481.6268523.693507e-08
0.5805361.6266233.710687e-08
0.5832361.6263963.727947e-08
0.5859491.6261723.745287e-08
0.5886751.625953.762708e-08
0.5914131.625733.780210e-08
0.5941641.6255123.797794e-08
0.5969271.6252973.815459e-08
0.5997041.6250833.833206e-08
0.61.625063.835100e-08
0.6024931.6248723.851036e-08
0.6052961.6246623.868949e-08
0.6081111.6244553.886946e-08
0.610941.624253.905025e-08
0.6137811.6240463.923190e-08
0.6166361.6238453.941438e-08
0.6195041.6236463.959771e-08
0.6223861.6234483.978190e-08
0.6252811.6232523.996694e-08
0.6281891.6230594.015285e-08
0.6311111.6228674.033962e-08
0.6340471.6226774.052725e-08
0.6369961.6224884.071577e-08
0.6399591.6223024.090515e-08
0.6429351.6221174.109542e-08
0.6459261.6219334.128657e-08
0.648931.6217524.147862e-08
0.651.6216884.154700e-08
0.6519491.6215724.101602e-08
0.6549811.6213944.018969e-08
0.6580281.6212173.935951e-08
0.6610881.6210423.852546e-08
0.6641631.6208693.768754e-08
0.6672521.6206973.684572e-08
0.6703561.6205273.599999e-08
0.6734741.6203583.515032e-08
0.6766071.6201913.429670e-08
0.6797541.6200253.343911e-08
0.6829151.6198613.257753e-08
0.6860921.6196983.171195e-08
0.6892831.6195373.084233e-08
0.6924891.6193772.996867e-08
0.695711.6192182.909095e-08
0.6989461.6190612.820915e-08
0.71.619012.792200e-08
0.7021971.6189052.800965e-08
0.7054631.618752.813994e-08
0.7087451.6185972.827083e-08
0.7120411.6184452.840233e-08
0.7153531.6182942.853444e-08
0.7186811.6181452.866717e-08
0.7220231.6179972.880052e-08
0.7253821.617852.893448e-08
0.7287561.6177042.906907e-08
0.7321461.6175592.920428e-08
0.7355511.6174162.934013e-08
0.7389721.6172742.947660e-08
0.7424091.6171332.961371e-08
0.7458631.6169932.975146e-08
0.7493321.6168542.988985e-08
0.7528171.6167163.002888e-08
0.7563191.616583.016856e-08
0.7598371.6164443.030889e-08
0.7633711.616313.044987e-08
0.7669221.6161763.059151e-08
0.7704891.6160443.073380e-08
0.7740731.6159133.087676e-08
0.7776731.6157823.102038e-08
0.781291.6156533.116468e-08
0.7849241.6155253.130964e-08
0.7885751.6153973.145527e-08
0.7922431.6152713.160159e-08
0.7959281.6151453.174858e-08
0.799631.615023.189626e-08
0.81.6150083.191100e-08
0.803351.6148973.068035e-08
0.8070861.6147742.930759e-08
0.810841.6146522.792843e-08
0.8146121.6145312.654286e-08
0.8184011.6144112.515085e-08
0.8222081.6142912.375236e-08
0.8260321.6141732.234737e-08
0.8298741.6140552.093584e-08
0.8337341.6139381.951775e-08
0.8376121.6138221.809306e-08
0.8415081.6137071.666174e-08
0.8454221.6135921.522377e-08
0.8493551.6134781.377910e-08
0.851.613461.354200e-08
0.8533051.6133651.359462e-08
0.8572741.6132531.365781e-08
0.8612621.6131411.372129e-08
0.8652681.613031.378506e-08
0.8692921.612921.384913e-08
0.8733361.6128111.391350e-08
0.8773981.6127021.397817e-08
0.8814791.6125941.404315e-08
0.8855791.6124861.410842e-08
0.8896981.6123791.417399e-08
0.8938361.6122731.423988e-08
0.8979941.6121681.430606e-08
0.91.6121171.433800e-08
0.9021711.6120631.437260e-08
0.9063671.6119581.443949e-08
0.9105831.6118551.450669e-08
0.9148181.6117511.457420e-08
0.9190731.6116491.464203e-08
0.9233481.6115471.471017e-08
0.9276431.6114451.477863e-08
0.9319581.6113441.484741e-08
0.9362931.6112441.491651e-08
0.9406481.6111441.498593e-08
0.9450231.6110451.505567e-08
0.9494191.6109461.512573e-08
0.951.6109331.513500e-08
0.9538351.6108471.519605e-08
0.9582711.610751.526668e-08
0.9627291.6106521.533764e-08
0.9672071.6105551.540893e-08
0.9717051.6104591.548055e-08
0.9762251.6103631.555250e-08
0.9807661.6102671.562479e-08
0.9853281.6101721.569742e-08
0.9899111.6100771.577038e-08
0.9945151.6099831.584368e-08
0.9991411.6098891.591732e-08
11.6098711.593100e-08
1.003791.6097951.599136e-08
1.008461.6097021.606575e-08
1.013151.6096091.614049e-08
1.017861.6095171.621558e-08
1.022591.6094251.629101e-08
1.027351.6093331.636680e-08
1.032131.6092421.644293e-08
1.036931.6091511.651943e-08
1.041751.609061.659628e-08
1.04661.6089691.667348e-08
1.051471.6088791.675105e-08
1.056361.6087891.682897e-08
1.061.6087231.688700e-08
1.061271.60871.690726e-08
1.066211.6086111.698593e-08
1.071171.6085221.706496e-08
1.076151.6084331.714435e-08
1.081151.6083441.722412e-08
1.086181.6082561.730426e-08
1.091241.6081681.738477e-08
1.096311.608081.746565e-08
1.101411.6079931.754691e-08
1.106531.6079051.762855e-08
1.111681.6078181.771057e-08
1.116851.6077311.779297e-08
1.122051.6076441.787576e-08
1.127271.6075581.795892e-08
1.132511.6074711.804248e-08
1.137781.6073851.812642e-08
1.143071.6072991.821076e-08
1.148391.6072131.829549e-08
1.153731.6071271.838061e-08
1.159091.6070411.846612e-08
1.164481.6069561.855204e-08
1.16991.606871.863835e-08
1.175341.6067851.872507e-08
1.180811.60671.881219e-08
1.18631.6066151.889971e-08
1.191821.6065291.898764e-08
1.197361.6064441.907598e-08
1.21.6064041.911800e-08
1.202931.6063591.998522e-08
1.208531.6062742.163979e-08
1.214151.606192.330205e-08
1.21981.6061052.497205e-08
1.225471.606022.664981e-08
1.231171.6059352.833538e-08
1.23691.605853.002878e-08
1.242651.6057663.173007e-08
1.248431.6056813.343926e-08
1.254241.6055963.515641e-08
1.260071.6055113.688154e-08
1.265931.6054273.861470e-08
1.271821.6053424.035592e-08
1.277741.6052574.210524e-08
1.283681.6051724.386269e-08
1.289651.6050874.562832e-08
1.295651.6050024.740217e-08
1.301671.6049174.918426e-08
1.307731.6048325.097464e-08
1.313811.6047465.277335e-08
1.319921.6046615.458043e-08
1.326061.6045765.639591e-08
1.332231.604495.821983e-08
1.338431.6044046.005224e-08
1.344651.6043186.189318e-08
1.350911.6042336.374267e-08
1.357191.6041466.560077e-08
1.36351.604066.746751e-08
1.369851.6039746.934293e-08
1.376221.6038877.122708e-08
1.382621.60387.311999e-08
1.389051.6037137.502171e-08
1.395511.6036267.693227e-08
1.41.6035667.826000e-08
1.4021.6035397.862868e-08
1.408521.6034517.983021e-08
1.415071.6033648.103732e-08
1.421661.6032768.225005e-08
1.428271.6031888.346842e-08
1.434911.6030998.469246e-08
1.441591.603018.592219e-08
1.448291.6029218.715764e-08
1.455031.6028328.839883e-08
1.46181.6027438.964580e-08
1.468591.6026539.089857e-08
1.475431.6025639.215717e-08
1.482291.6024729.342162e-08
1.489181.6023829.469195e-08
1.496111.6022919.596819e-08
1.503071.6021999.725037e-08
1.510061.6021089.853851e-08
1.517081.6020169.983265e-08
1.524141.6019231.011328e-07
1.531231.6018311.024390e-07
1.538351.6017371.037513e-07
1.545511.6016441.050697e-07
1.55271.601551.063942e-07
1.559921.6014561.077248e-07
1.567171.6013611.090617e-07
1.574461.6012661.104048e-07
1.581791.6011711.117541e-07
1.589141.6010751.131097e-07
1.596541.6009781.144716e-07
1.61.6009331.151100e-07
1.603961.6008811.214715e-07
1.611421.6007841.334528e-07
1.618921.6006861.454898e-07
1.626451.6005881.575828e-07
1.634011.6004891.697320e-07
1.641611.600391.819378e-07
1.649251.600291.942003e-07
1.656921.600192.065199e-07
1.664631.6000892.188967e-07
1.672371.5999882.313312e-07
1.680151.5998862.438235e-07
1.687961.5997842.563738e-07
1.695811.5996812.689826e-07
1.70371.5995772.816500e-07
1.711631.5994732.943763e-07
1.719591.5993683.071618e-07
1.727591.5992633.200068e-07
1.735621.5991573.329115e-07
1.743691.599053.458763e-07
1.751811.5989433.589013e-07
1.759951.5988353.719870e-07
1.768141.5987263.851335e-07
1.776361.5986173.983411e-07
1.784631.5985074.116102e-07
1.792931.5983974.249410e-07
1.81.5983024.363000e-07
1.801271.5982854.389190e-07
1.809641.5981734.562453e-07
1.818061.598064.736522e-07
1.826521.5979474.911400e-07
1.835011.5978335.087092e-07
1.843551.5977185.263601e-07
1.852121.5976025.440931e-07
1.860741.5974855.619086e-07
1.869391.5973685.798070e-07
1.878091.597255.977886e-07
1.886821.5971316.158538e-07
1.89561.5970116.340031e-07
1.904421.596896.522368e-07
1.913281.5967696.705553e-07
1.922181.5966466.889590e-07
1.931121.5965237.074483e-07
1.94011.5963997.260237e-07
1.949121.5962747.446854e-07
1.958191.5961487.634339e-07
1.96731.5960217.822696e-07
1.976451.5958938.011929e-07
1.985641.5957648.202043e-07
1.994881.5956358.393041e-07
21.5955628.499000e-07
2.004161.5955048.762660e-07
2.013481.5953729.354186e-07
2.022841.5952399.948464e-07
2.032251.5951051.054551e-06
2.04171.5949711.114533e-06
2.05121.5948351.174794e-06
2.060741.5946981.235335e-06
2.070331.594561.296158e-06
2.079961.5944211.357263e-06
2.089631.594281.418653e-06
2.099351.5941391.480329e-06
2.109121.5939961.542291e-06
2.118931.5938531.604542e-06
2.128781.5937081.667082e-06
2.138681.5935621.729913e-06
2.148631.5934151.793036e-06
2.158621.5932661.856453e-06
2.168671.5931171.920165e-06
2.178751.5929661.984173e-06
2.188891.5928132.048479e-06
2.199071.592662.113084e-06
2.21.5926462.119000e-06
2.20931.5925052.166871e-06
2.219571.5923492.219788e-06
2.22991.5921922.272951e-06
2.240271.5920332.326362e-06
2.250691.5918732.380021e-06
2.261161.5917112.433930e-06
2.271671.5915482.488089e-06
2.282241.5913842.542500e-06
2.292861.5912182.597164e-06
2.303521.5910512.652083e-06
2.314241.5908822.707257e-06
2.3251.5907122.762687e-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
—