Optical constants

Refractive index of BAF5 (CDGM)

BAF5: n,k 0.365–1.014 µm

Data
formula 3 + tabulated k
Range
0.365–1.014 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.365–1.014 µm
Refractive index n
1.60562
Extinction coefficient k
2.92327e-08
Permittivity ε1
2.57802
Permittivity ε2
9.38733e-08
Absorption coefficient α
0.00625169 cm⁻¹
Penetration depth δ = λ/(2πk)
3.19914e+09 nm
Abbe number Vd
43.89
Chromatic dispersion dn/dλ
-0.0703601 µm⁻¹
Group index ng
1.64696
Group velocity dispersion
133.326 fs²/mm
Dispersion parameter D
-727.365 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

# BAF5 (CDGM): BAF5
cdgm_baf5 = ls.fetch_refractiveindex("specs", "CDGM-optical", "BAF5", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_baf5.range_nm)  # (365, 1014) nm
eps = cdgm_baf5.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

Polynomial (formula 3), λ in µm
n2=2.52216221−0.00832442891⁢λ2.0+0.0186334008⁢λ−2.0+0.000582653358⁢λ−4.0−1.12806453×10-5⁢λ−6.0+2.08955914×10-6⁢λ−8.0

Valid from 0.365 to 1.014 µm.

Coefficients as stored
CiValue
C12.52216221
C2-0.00832442891
C32.0
C40.0186334008
C5-2.0
C60.000582653358
C7-4.0
C8-1.12806453e-05
C9-6.0
C102.08955914e-06
C11-8.0

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 8.8e-08 1.12e-08 -6.6e-11 7.53e-07 3.18e-09 0.217
nd
1.605623
Vd
43.890292
glass code
606439
glass status
preferred
density
value: 3500
thermal expansion
value: 8.1e-06, temperature range: 243 343; value: 9.8e-06, temperature range: 293 573
dPgF
-0.0008

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 1.09e-06 K⁻¹ at 633 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 418 wavelengths, the same grid as the API and the library
BAF5 (CDGM), BAF5: n and k versus wavelength
λ (µm)nk
0.3651.641831.319450e-07
0.3659361.641491.251720e-07
0.3668741.6411531.183815e-07
0.3678151.6408181.115737e-07
0.3687581.6404861.047484e-07
0.3697041.6401569.790566e-08
0.371.6400539.576000e-08
0.3706511.6398289.430723e-08
0.3716021.6395039.218788e-08
0.3725551.639189.006309e-08
0.373511.638868.793286e-08
0.3744681.6385428.579716e-08
0.3754281.6382278.365599e-08
0.376391.6379138.150932e-08
0.3773561.6376037.935716e-08
0.3783231.6372947.719947e-08
0.3792931.6369877.503625e-08
0.381.6367667.346000e-08
0.3802661.6366837.300597e-08
0.3812411.6363817.133983e-08
0.3822181.6360816.966942e-08
0.3831981.6357846.799473e-08
0.3841811.6354886.631574e-08
0.3851661.6351956.463245e-08
0.3861541.6349046.294484e-08
0.3871441.6346146.125291e-08
0.3881361.6343275.955663e-08
0.3891321.6340425.785601e-08
0.391.6337955.637200e-08
0.3901291.6337595.618165e-08
0.391131.6334785.470917e-08
0.3921331.6331995.323292e-08
0.3931381.6329225.175288e-08
0.3941461.6326465.026904e-08
0.3951571.6323734.878140e-08
0.396171.6321024.728995e-08
0.3971861.6318324.579467e-08
0.3982041.6315654.429556e-08
0.3992251.6312994.279261e-08
0.41.6310994.165200e-08
0.4002491.6310354.159374e-08
0.4012751.6307734.135338e-08
0.4023041.6305134.111241e-08
0.4033351.6302544.087083e-08
0.404371.6299974.062862e-08
0.4054071.6297424.038579e-08
0.4064461.6294894.014234e-08
0.4074881.6292383.989827e-08
0.4085331.6289883.965357e-08
0.4095811.628743.940824e-08
0.4106311.6284933.916228e-08
0.4116841.6282483.891570e-08
0.4127391.6280053.866848e-08
0.4137981.6277643.842062e-08
0.4148591.6275243.817213e-08
0.4159221.6272863.792301e-08
0.4169891.6270493.767324e-08
0.4180581.6268143.742284e-08
0.419131.6265813.717179e-08
0.421.6263933.696800e-08
0.4202051.6263493.698601e-08
0.4212821.6261183.708088e-08
0.4223621.6258893.717599e-08
0.4234451.6256623.727135e-08
0.4245311.6254363.736695e-08
0.4256191.6252123.746279e-08
0.4267111.6249893.755888e-08
0.4278051.6247673.765522e-08
0.4289021.6245473.775180e-08
0.4300021.6243293.784864e-08
0.4311041.6241113.794572e-08
0.4322091.6238963.804305e-08
0.4333181.6236813.814063e-08
0.4344291.6234683.823845e-08
0.4355431.6232573.833653e-08
0.4366591.6230473.843487e-08
0.4377791.6228383.853345e-08
0.4389021.622633.863229e-08
0.441.6224293.872900e-08
0.4400271.6224243.872638e-08
0.4411551.6222193.861700e-08
0.4422861.6220163.850733e-08
0.443421.6218133.839739e-08
0.4445571.6216123.828716e-08
0.4456971.6214133.817664e-08
0.446841.6212143.806585e-08
0.4479861.6210173.795477e-08
0.4491351.6208213.784341e-08
0.4502861.6206263.773176e-08
0.4514411.6204333.761982e-08
0.4525981.6202413.750760e-08
0.4537591.620053.739509e-08
0.4549221.619863.728229e-08
0.4560891.6196713.716920e-08
0.4572581.6194843.705582e-08
0.4584311.6192973.694215e-08
0.4596061.6191123.682819e-08
0.461.6190513.679000e-08
0.4607851.6189283.670147e-08
0.4619661.6187453.656814e-08
0.4631511.6185643.643446e-08
0.4643381.6183833.630045e-08
0.4655291.6182043.616609e-08
0.4667221.6180253.603138e-08
0.4679191.6178483.589633e-08
0.4691191.6176723.576094e-08
0.4703221.6174973.562519e-08
0.4715281.6173233.548910e-08
0.4727371.617153.535266e-08
0.4739491.6169783.521587e-08
0.4751641.6168073.507873e-08
0.4763821.6166373.494124e-08
0.4776041.6164683.480340e-08
0.4788291.6163013.466520e-08
0.481.6161423.453300e-08
0.4800561.6161343.452575e-08
0.4812871.6159683.436734e-08
0.4825211.6158033.420851e-08
0.4837581.615643.404928e-08
0.4849991.6154773.388964e-08
0.4862421.6153153.372959e-08
0.4874891.6151543.356914e-08
0.4887391.6149953.340826e-08
0.4899921.6148363.324698e-08
0.4912491.6146783.308529e-08
0.4925081.6145213.292317e-08
0.4937711.6143653.276065e-08
0.4950371.614213.259770e-08
0.4963071.6140553.243434e-08
0.4975791.6139023.227056e-08
0.4988551.613753.210636e-08
0.51.6136143.195900e-08
0.5001341.6135983.195574e-08
0.5014161.6134483.192461e-08
0.5027021.6132983.189339e-08
0.5039911.6131493.186210e-08
0.5052831.6130013.183072e-08
0.5065791.6128543.179926e-08
0.5078781.6127083.176772e-08
0.509181.6125623.173611e-08
0.5104861.6124183.170441e-08
0.5117951.6122743.167263e-08
0.5131071.6121313.164076e-08
0.5144231.6119893.160882e-08
0.5157421.6118483.157679e-08
0.5170641.6117083.154469e-08
0.518391.6115683.151250e-08
0.5197191.6114293.148022e-08
0.5210521.6112923.144787e-08
0.5223881.6111543.141543e-08
0.5237271.6110183.138291e-08
0.525071.6108823.135030e-08
0.5264161.6107483.131761e-08
0.5277661.6106143.128484e-08
0.5291191.610483.125198e-08
0.5304761.6103483.121904e-08
0.5318361.6102163.118602e-08
0.53321.6100853.115291e-08
0.5345671.6099553.111971e-08
0.5359381.6098253.108643e-08
0.5373121.6096973.105307e-08
0.538691.6095683.101962e-08
0.5400711.6094413.098608e-08
0.5414561.6093153.095246e-08
0.5428441.6091893.091875e-08
0.5442361.6090633.088495e-08
0.5456311.6089393.085107e-08
0.547031.6088153.081710e-08
0.5484331.6086923.078305e-08
0.5498391.608573.074890e-08
0.551.6085563.074500e-08
0.5512491.6084483.069476e-08
0.5526631.6083273.063791e-08
0.554081.6082063.058092e-08
0.55551.6080873.052378e-08
0.5569251.6079683.046649e-08
0.5583531.6078493.040905e-08
0.5597841.6077323.035147e-08
0.561221.6076153.029374e-08
0.5626591.6074983.023587e-08
0.5641011.6073823.017784e-08
0.5655481.6072673.011967e-08
0.5669981.6071533.006134e-08
0.5684521.6070393.000287e-08
0.5699091.6069262.994425e-08
0.5713711.6068132.988547e-08
0.5728361.6067012.982655e-08
0.5743041.6065892.976747e-08
0.5757771.6064792.970825e-08
0.5772531.6063682.964887e-08
0.5787331.6062592.958934e-08
0.5802171.606152.952966e-08
0.5817051.6060412.946982e-08
0.5831971.6059332.940983e-08
0.5846921.6058262.934969e-08
0.5861911.6057192.928939e-08
0.5876941.6056132.922894e-08
0.5892011.6055082.916833e-08
0.5907121.6054032.910756e-08
0.5922271.6052982.904665e-08
0.5937451.6051942.898557e-08
0.5952681.6050912.892434e-08
0.5967941.6049882.886295e-08
0.5983241.6048862.880141e-08
0.5998581.6047852.873970e-08
0.61.6047752.873400e-08
0.6013961.6046832.894627e-08
0.6029381.6045832.918069e-08
0.6044841.6044832.941571e-08
0.6060341.6043832.965133e-08
0.6075881.6042842.988756e-08
0.6091461.6041863.012439e-08
0.6107081.6040883.036183e-08
0.6122741.603993.059988e-08
0.6138441.6038933.083854e-08
0.6154181.6037973.107781e-08
0.6169961.6037013.131770e-08
0.6185781.6036053.155820e-08
0.6201641.603513.179932e-08
0.6217541.6034163.204105e-08
0.6233481.6033223.228341e-08
0.6249471.6032283.252638e-08
0.6265491.6031353.276998e-08
0.6281561.6030433.301421e-08
0.6297661.6029513.325906e-08
0.6313811.6028593.350453e-08
0.6331.6027683.375064e-08
0.6346231.6026773.399738e-08
0.636251.6025873.424475e-08
0.6378821.6024973.449276e-08
0.6395171.6024083.474140e-08
0.6411571.6023193.499068e-08
0.6428011.6022313.524060e-08
0.6444491.6021433.549115e-08
0.6461021.6020553.574236e-08
0.6477581.6019683.599420e-08
0.6494191.6018823.624669e-08
0.651.6018513.633500e-08
0.6510841.6017953.639561e-08
0.6527541.601713.648893e-08
0.6544271.6016243.658249e-08
0.6561051.6015393.667629e-08
0.6577881.6014553.677033e-08
0.6594741.6013713.686462e-08
0.6611651.6012873.695914e-08
0.6628611.6012043.705391e-08
0.664561.6011213.714892e-08
0.6662641.6010393.724417e-08
0.6679731.6009573.733967e-08
0.6696851.6008753.743541e-08
0.6714021.6007943.753140e-08
0.6731241.6007133.762763e-08
0.674851.6006323.772411e-08
0.676581.6005523.782084e-08
0.6783151.6004733.791781e-08
0.6800541.6003933.801504e-08
0.6817981.6003143.811251e-08
0.6835461.6002363.821024e-08
0.6852991.6001583.830821e-08
0.6870561.600083.840644e-08
0.6888181.6000033.850491e-08
0.6905841.5999263.860364e-08
0.6923551.5998493.870263e-08
0.694131.5997733.880186e-08
0.695911.5996973.890136e-08
0.6976941.5996213.900110e-08
0.6994831.5995463.910110e-08
0.71.5995243.913000e-08
0.7012771.5994713.903784e-08
0.7030751.5993963.890803e-08
0.7048771.5993223.877789e-08
0.7066851.5992483.864742e-08
0.7084971.5991753.851661e-08
0.7103131.5991023.838547e-08
0.7121351.5990293.825399e-08
0.7139611.5989563.812217e-08
0.7157911.5988843.799002e-08
0.7176271.5988133.785752e-08
0.7194671.5987413.772469e-08
0.7213121.598673.759151e-08
0.7231611.5985993.745800e-08
0.7250151.5985293.732414e-08
0.7268741.5984583.718994e-08
0.7287381.5983883.705539e-08
0.7306071.5983193.692050e-08
0.732481.598253.678527e-08
0.7343581.5981813.664968e-08
0.7362411.5981123.651375e-08
0.7381291.5980443.637747e-08
0.7400221.5979763.624085e-08
0.7419191.5979083.610387e-08
0.7438211.5978413.596654e-08
0.7457291.5977733.582885e-08
0.7476411.5977073.569082e-08
0.7495581.597643.555243e-08
0.751481.5975743.541369e-08
0.7534061.5975083.527459e-08
0.7553381.5974423.513513e-08
0.7572751.5973773.499531e-08
0.7592171.5973123.485514e-08
0.7611631.5972473.471461e-08
0.7631151.5971823.457372e-08
0.7650721.5971183.443246e-08
0.7670341.5970543.429085e-08
0.7691.596993.414887e-08
0.7709721.5969273.400653e-08
0.7729491.5968633.386382e-08
0.7749311.59683.372074e-08
0.7769181.5967383.357730e-08
0.778911.5966753.343350e-08
0.7809071.5966133.328932e-08
0.7829091.5965513.314477e-08
0.7849171.596493.299985e-08
0.7869291.5964283.285456e-08
0.7889471.5963673.270890e-08
0.790971.5963063.256287e-08
0.7929981.5962463.241646e-08
0.7950321.5961853.226967e-08
0.797071.5961253.212251e-08
0.7991141.5960653.197497e-08
0.81.5960393.191100e-08
0.8011631.5960053.164150e-08
0.8032171.5959463.116541e-08
0.8052771.5958873.068810e-08
0.8073411.5958283.020956e-08
0.8094111.5957692.972979e-08
0.8114871.595712.924880e-08
0.8135681.5956522.876657e-08
0.8156541.5955942.828311e-08
0.8177451.5955362.779840e-08
0.8198421.5954792.731245e-08
0.8219441.5954212.682526e-08
0.8240521.5953642.633682e-08
0.8261641.5953072.584712e-08
0.8282831.595252.535617e-08
0.8304071.5951942.486397e-08
0.8325361.5951382.437049e-08
0.8346711.5950812.387576e-08
0.8368111.5950262.337975e-08
0.8389561.594972.288248e-08
0.8411081.5949142.238392e-08
0.8432641.5948592.188409e-08
0.8454261.5948042.138298e-08
0.8475941.5947492.088058e-08
0.8497671.5946942.037690e-08
0.851.5946892.032300e-08
0.8519461.594642.036952e-08
0.8541311.5945862.042173e-08
0.8563211.5945322.047407e-08
0.8585171.5944782.052654e-08
0.8607181.5944242.057916e-08
0.8629251.594372.063190e-08
0.8651371.5943172.068478e-08
0.8673561.5942642.073780e-08
0.869581.5942112.079095e-08
0.8718091.5941582.084424e-08
0.8740451.5941062.089767e-08
0.8762861.5940532.095123e-08
0.8785331.5940012.100493e-08
0.8807851.5939492.105877e-08
0.8830441.5938972.111275e-08
0.8853081.5938452.116686e-08
0.8875781.5937942.122111e-08
0.8898541.5937422.127551e-08
0.8921351.5936912.133004e-08
0.8944231.593642.138471e-08
0.8967161.5935892.143952e-08
0.8990161.5935382.149447e-08
0.91.5935172.151800e-08
0.9013211.5934882.134939e-08
0.9036321.5934372.105436e-08
0.9059491.5933872.075857e-08
0.9082721.5933372.046203e-08
0.9106011.5932872.016472e-08
0.9129351.5932371.986666e-08
0.9152761.5931881.956782e-08
0.9176231.5931381.926823e-08
0.9199761.5930891.896786e-08
0.9223351.593041.866672e-08
0.92471.592991.836481e-08
0.9270711.5929421.806213e-08
0.9294481.5928931.775867e-08
0.9318311.5928441.745443e-08
0.934221.5927961.714942e-08
0.9366161.5927471.684362e-08
0.9390171.5926991.653703e-08
0.9414251.5926511.622966e-08
0.9438391.5926031.592150e-08
0.9462591.5925551.561256e-08
0.9486851.5925081.530282e-08
0.951.5924821.513500e-08
0.9511181.592461.515280e-08
0.9535571.5924131.519162e-08
0.9560021.5923661.523055e-08
0.9584531.5923181.526957e-08
0.9609111.5922711.530870e-08
0.9633741.5922241.534792e-08
0.9658451.5921781.538725e-08
0.9683211.5921311.542667e-08
0.9708041.5920841.546620e-08
0.9732931.5920381.550583e-08
0.9757891.5919921.554556e-08
0.9782911.5919461.558539e-08
0.9807991.5918991.562532e-08
0.9833141.5918531.566536e-08
0.9858351.5918081.570550e-08
0.9883631.5917621.574574e-08
0.9908971.5917161.578609e-08
0.9934381.5916711.582653e-08
0.9959851.5916251.586709e-08
0.9985391.591581.590774e-08
11.5915541.593100e-08
1.00111.5915351.594852e-08
1.003671.591491.598942e-08
1.006241.5914451.603042e-08
1.008821.59141.607153e-08
1.011411.5913551.611275e-08
1.0141.591311.615407e-08

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
—