Optical constants

Refractive index of BAFN6 (SCHOTT)

BAFN6: n,k 0.35–2.325 µm

Data
formula 2 + tabulated k
Range
0.35–2.325 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.35–2.325 µm
Refractive index n
1.589
Extinction coefficient k
1.12565e-08
Permittivity ε1
2.52491
Permittivity ε2
3.57732e-08
Absorption coefficient α
0.00240732 cm⁻¹
Penetration depth δ = λ/(2πk)
8.30801e+09 nm
Abbe number Vd
48.446
Chromatic dispersion dn/dλ
-0.0622561 µm⁻¹
Group index ng
1.62558
Group velocity dispersion
114.579 fs²/mm
Dispersion parameter D
-625.091 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

# BAFN6 (SCHOTT): BAFN6
schott_bafn6 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "BAFN6", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_bafn6.range_nm)  # (350, 2325) nm
eps = schott_bafn6.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=1.36719201λ2λ2−0.00882820704+0.10907994λ2λ2−0.0438731646+1.02108011λ2λ2−113.58602

Valid from 0.35 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.36719201
C30.00882820704
C40.10907994
C50.0438731646
C61.02108011
C7113.58602

Comments and conditions

inquiry glass

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 1.34e-06 1.34e-08 -5.5e-11 4.95e-07 3.62e-10 0.265
nd
1.589
Vd
48.45
glass code
589485.317
glass status
special
density
value: 3170
thermal expansion
value: 7.8e-06, temperature range: 243 343; value: 8.5e-06, temperature range: 293 573
dPgF
0.0002
resistance
acid: 2.0; stain: 0.0; alkali: 2.0; climatic: 2.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 1.36e-06 K⁻¹ at 633 nm, dn/dT = 7.68e-07 K⁻¹ at 1310 nm, dn/dT = 7.23e-07 K⁻¹ at 1550 nm

References

Cite

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com); See also SCHOTT 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
BAFN6 (SCHOTT), BAFN6: n and k versus wavelength
λ (µm)nk
0.351.625492.362200e-06
0.3516651.624882.174777e-06
0.3533381.6242791.986462e-06
0.3550191.6236871.797251e-06
0.3567071.6231031.607140e-06
0.3584041.6225271.416125e-06
0.3601091.621961.224201e-06
0.3618221.62141.031364e-06
0.3635431.6208488.376102e-07
0.3651.6203896.736500e-07
0.3652731.6203046.626271e-07
0.367011.6197675.924314e-07
0.3687561.6192375.219018e-07
0.371.6188664.716600e-07
0.3705111.6187154.605933e-07
0.3722731.61824.223855e-07
0.3740441.6176913.839958e-07
0.3758231.617193.454236e-07
0.3776111.6166953.066679e-07
0.3794071.6162062.677278e-07
0.381.6160472.548800e-07
0.3812121.6157242.415206e-07
0.3830261.6152482.215349e-07
0.3848481.6147792.014540e-07
0.3866781.6143151.812777e-07
0.3885181.6138581.610053e-07
0.391.6134951.446700e-07
0.3903661.6134061.427570e-07
0.3922231.612961.330506e-07
0.3940891.612521.232981e-07
0.3959631.6120861.134991e-07
0.3978471.6116561.036536e-07
0.399741.6112339.376117e-08
0.41.6111759.240000e-08
0.4016411.6108148.825347e-08
0.4035521.6104018.342613e-08
0.4051.6100927.976700e-08
0.4054711.6099937.923866e-08
0.40741.6095897.707709e-08
0.4093381.6091917.490523e-08
0.4112861.6087987.272305e-08
0.4132421.6084097.053048e-08
0.4152081.6080256.832748e-08
0.4171831.6076466.611401e-08
0.4191671.6072726.389000e-08
0.421.6071166.295700e-08
0.4211611.6069016.218515e-08
0.4231651.6065366.085372e-08
0.4251781.6061745.951596e-08
0.42721.6058175.817184e-08
0.4292331.6054645.682132e-08
0.4312751.6051155.546438e-08
0.4333261.6047715.410098e-08
0.4353871.604435.273110e-08
0.4361.604335.232400e-08
0.4374591.6040935.139702e-08
0.439541.6037615.007447e-08
0.441631.6034324.874562e-08
0.4437311.6031074.741045e-08
0.4458421.6027854.606893e-08
0.4479631.6024674.472103e-08
0.4500941.6021534.336672e-08
0.4522351.6018434.200596e-08
0.4543861.6015364.063873e-08
0.4565481.6012323.926500e-08
0.458721.6009323.788473e-08
0.461.6007573.707100e-08
0.4609021.6006353.674114e-08
0.4630941.6003413.593912e-08
0.4652971.6000513.513328e-08
0.4675111.5997643.432362e-08
0.4697351.599483.351010e-08
0.4719691.59923.269271e-08
0.4742141.5989223.187143e-08
0.476471.5986473.104624e-08
0.4787371.5983763.021713e-08
0.4810141.5981072.938408e-08
0.4833021.5978412.854706e-08
0.4856011.5975792.770606e-08
0.4879111.5973192.686106e-08
0.4902321.5970612.601204e-08
0.4925641.5968072.515899e-08
0.4949071.5965552.430187e-08
0.4972621.5963062.344068e-08
0.4996271.596062.257539e-08
0.51.5960212.243900e-08
0.5020041.5958162.214600e-08
0.5043921.5955752.179683e-08
0.5067911.5953362.144599e-08
0.5092021.59512.109349e-08
0.5116241.5948662.073931e-08
0.5140581.5946352.038345e-08
0.5165041.5944062.002589e-08
0.5189611.5941791.966664e-08
0.5214291.5939551.930567e-08
0.523911.5937331.894299e-08
0.5264021.5935141.857858e-08
0.5289061.5932961.821244e-08
0.5314221.5930811.784455e-08
0.533951.5928681.747492e-08
0.536491.5926571.710353e-08
0.5390421.5924491.673037e-08
0.5416061.5922421.635543e-08
0.5441831.5920381.597872e-08
0.5461.5918951.571300e-08
0.5467711.5918351.560859e-08
0.5493721.5916351.525654e-08
0.5519861.5914371.490281e-08
0.5546121.591241.454740e-08
0.557251.5910461.419030e-08
0.5599011.5908531.383150e-08
0.5625641.5906621.347100e-08
0.565241.5904741.310878e-08
0.5679291.5902871.274483e-08
0.5706311.5901011.237916e-08
0.5733451.5899181.201174e-08
0.5760731.5897361.164258e-08
0.5788131.5895571.127166e-08
0.581.589481.111100e-08
0.5815661.5893791.114100e-08
0.5843331.5892021.119398e-08
0.5871131.5890271.124721e-08
0.5899051.5888541.130069e-08
0.5927121.5886831.135443e-08
0.5955311.5885131.140842e-08
0.5983641.5883451.146267e-08
0.6012111.5881781.151718e-08
0.6040711.5880131.157195e-08
0.6069441.587851.162698e-08
0.6098311.5876881.168227e-08
0.6127321.5875271.173782e-08
0.6156471.5873681.179364e-08
0.6185761.587211.184972e-08
0.621.5871341.187700e-08
0.6215181.5870541.182591e-08
0.6244751.5868991.172642e-08
0.6274451.5867461.162646e-08
0.630431.5865941.152602e-08
0.6334291.5864431.142511e-08
0.6364421.5862941.132371e-08
0.639471.5861461.122184e-08
0.6425121.5861.111948e-08
0.6455681.5858541.101663e-08
0.6486391.585711.091329e-08
0.6517251.5855681.080946e-08
0.6548251.5854261.070514e-08
0.657941.5852861.060032e-08
0.661.5851941.053100e-08
0.661071.5851471.042839e-08
0.6642151.5850091.012678e-08
0.6673741.5848729.823732e-09
0.6705491.5847369.519247e-09
0.6737391.5846029.213313e-09
0.6769441.5844698.905924e-09
0.6801641.5843378.597073e-09
0.68341.5842058.286752e-09
0.686651.5840767.974956e-09
0.6899171.5839477.661676e-09
0.6931991.5838197.346905e-09
0.6964961.5836927.030638e-09
0.699811.5835666.712866e-09
0.71.5835596.694600e-09
0.7031391.5834426.783686e-09
0.7064831.5833186.878627e-09
0.7098441.5831956.974020e-09
0.7132211.5830737.069866e-09
0.7166141.5829537.166169e-09
0.7200231.5828337.262929e-09
0.7234481.5827147.360150e-09
0.7268891.5825967.457834e-09
0.7303471.5824797.555982e-09
0.7338211.5823637.654597e-09
0.7373121.5822477.753681e-09
0.7408191.5821337.853236e-09
0.7443431.5820197.953265e-09
0.7478841.5819078.053770e-09
0.7514421.5817958.154753e-09
0.7550171.5816848.256216e-09
0.7586081.5815738.358162e-09
0.7622171.5814648.460593e-09
0.7658431.5813558.563511e-09
0.7694861.5812478.666919e-09
0.7731461.581148.770818e-09
0.7768241.5810348.875212e-09
0.780521.5809288.980103e-09
0.7842321.5808249.085492e-09
0.7879631.5807199.191383e-09
0.7917111.5806169.297777e-09
0.7954781.5805139.404678e-09
0.7992621.5804119.512087e-09
0.8030641.580319.620007e-09
0.8068841.5802099.728441e-09
0.8107221.5801099.837390e-09
0.8145791.580019.946858e-09
0.8184541.5799111.005685e-08
0.8223471.5798131.016736e-08
0.8262591.5797151.027839e-08
0.830191.5796181.038996e-08
0.8341391.5795221.050206e-08
0.8381071.5794261.061469e-08
0.8420941.5793311.072785e-08
0.84611.5792361.084155e-08
0.8501241.5791421.095580e-08
0.8541681.5790491.107059e-08
0.8582321.5789561.118592e-08
0.8623141.5788631.130180e-08
0.8664161.5787721.141824e-08
0.8705381.578681.153522e-08
0.8746791.5785891.165277e-08
0.878841.5784991.177087e-08
0.8830211.5784091.188954e-08
0.8872211.5783191.200877e-08
0.8914421.578231.212856e-08
0.8956821.5781421.224893e-08
0.8999431.5780541.236987e-08
0.9042241.5779661.249138e-08
0.9085251.5778791.261348e-08
0.9128471.5777921.273615e-08
0.917191.5777061.285941e-08
0.9215531.577621.298325e-08
0.9259371.5775341.310768e-08
0.9303411.5774491.323271e-08
0.9347671.5773641.335833e-08
0.9392141.5772791.348454e-08
0.9436811.5771951.361136e-08
0.948171.5771111.373878e-08
0.9526811.5770281.386681e-08
0.9572131.5769451.399544e-08
0.9617661.5768621.412469e-08
0.9663411.576781.425455e-08
0.9709381.5766971.438503e-08
0.9755571.5766161.451613e-08
0.9801981.5765341.464786e-08
0.9848611.5764531.478021e-08
0.9895461.5763721.491319e-08
0.9942531.5762911.504680e-08
0.9989821.5762111.518105e-08
1.003731.576131.531594e-08
1.008511.576051.545147e-08
1.013311.5759711.558764e-08
1.018131.5758911.572446e-08
1.022971.5758121.586193e-08
1.027841.5757331.600006e-08
1.032731.5756541.613884e-08
1.037641.5755751.627829e-08
1.042571.5754971.641839e-08
1.047531.5754181.655917e-08
1.052521.575341.670061e-08
1.057521.5752621.684273e-08
1.061.5752241.691300e-08
1.062551.5751841.695376e-08
1.067611.5751071.703441e-08
1.072691.5750291.711544e-08
1.077791.5749521.719686e-08
1.082921.5748751.727866e-08
1.088071.5747971.736086e-08
1.093251.574721.744344e-08
1.098451.5746431.752642e-08
1.103671.5745671.760979e-08
1.108921.574491.769356e-08
1.11421.5744131.777772e-08
1.11951.5743371.786229e-08
1.124821.574261.794726e-08
1.130171.5741841.803263e-08
1.135551.5741071.811841e-08
1.140951.5740311.820460e-08
1.146381.5739551.829120e-08
1.151831.5738781.837821e-08
1.157311.5738021.846563e-08
1.162821.5737261.855347e-08
1.168351.573651.864172e-08
1.173911.5735741.873040e-08
1.179491.5734971.881950e-08
1.18511.5734211.890902e-08
1.190741.5733451.899897e-08
1.19641.5732691.908935e-08
1.202091.5731921.918015e-08
1.207811.5731161.927139e-08
1.213561.573041.936306e-08
1.219331.5729631.945517e-08
1.225131.5728871.954772e-08
1.230961.572811.964071e-08
1.236811.5727331.973414e-08
1.24271.5726561.982801e-08
1.248611.572581.992233e-08
1.254551.5725032.001710e-08
1.260521.5724262.011232e-08
1.266511.5723482.020799e-08
1.272541.5722712.030412e-08
1.278591.5721942.040070e-08
1.284671.5721162.049775e-08
1.290791.5720382.059525e-08
1.296931.571962.069322e-08
1.30311.5718822.079166e-08
1.309291.5718042.089056e-08
1.315521.5717262.098994e-08
1.321781.5716472.108979e-08
1.328071.5715682.119011e-08
1.334391.5714892.129091e-08
1.340731.571412.139219e-08
1.347111.5713312.149395e-08
1.353521.5712512.159619e-08
1.359961.5711712.169892e-08
1.366431.5710912.180214e-08
1.372931.5710112.190585e-08
1.379461.570932.201006e-08
1.386021.5708492.211476e-08
1.392611.5707682.221996e-08
1.399241.5706872.232566e-08
1.405891.5706052.243186e-08
1.412581.5705232.253856e-08
1.41931.570442.264578e-08
1.426051.5703582.275350e-08
1.432841.5702752.286174e-08
1.439651.5701922.297049e-08
1.44651.5701082.307976e-08
1.453381.5700242.318955e-08
1.46031.569942.329986e-08
1.467241.5698552.341069e-08
1.474221.569772.352206e-08
1.481241.5696842.363395e-08
1.488281.5695992.374637e-08
1.495361.5695122.385933e-08
1.502481.5694262.397283e-08
1.509621.5693392.408687e-08
1.51681.5692512.420145e-08
1.524021.5691632.431657e-08
1.531.569092.441200e-08
1.531271.5690752.546050e-08
1.538551.5689863.147973e-08
1.545871.5688973.752760e-08
1.553231.5688074.360424e-08
1.560611.5687174.970978e-08
1.568041.5686265.584437e-08
1.57551.5685356.200814e-08
1.582991.5684436.820124e-08
1.590521.5683517.442379e-08
1.598091.5682598.067594e-08
1.605691.5681658.695784e-08
1.613331.5680729.326962e-08
1.6211.5679779.961142e-08
1.628711.5678821.059834e-07
1.636461.5677871.123857e-07
1.644251.5676911.188184e-07
1.652071.5675941.252818e-07
1.659931.5674971.317758e-07
1.667821.5673991.383008e-07
1.675761.5673011.448568e-07
1.683731.5672011.514440e-07
1.691741.5671021.580626e-07
1.699791.5670011.647126e-07
1.707871.56691.713943e-07
1.7161.5667991.781077e-07
1.724161.5666961.848531e-07
1.732361.5665931.916305e-07
1.74061.5664891.984402e-07
1.748881.5663852.052823e-07
1.75721.5662792.121570e-07
1.765561.5661732.190643e-07
1.773961.5660672.260046e-07
1.78241.5659592.329778e-07
1.790881.5658512.399842e-07
1.79941.5657422.470239e-07
1.807961.5656322.540971e-07
1.816561.5655212.612040e-07
1.82521.565412.683446e-07
1.833881.5652982.755193e-07
1.84261.5651852.827280e-07
1.851371.5650712.899711e-07
1.860181.5649562.972486e-07
1.869031.564843.045607e-07
1.877921.5647233.119076e-07
1.886851.5646063.192895e-07
1.895821.5644873.267065e-07
1.904841.5643683.341587e-07
1.91391.5642483.416465e-07
1.923011.5641273.491698e-07
1.932161.5640043.567289e-07
1.941351.5638813.643240e-07
1.950581.5637573.719552e-07
1.959861.5636323.796227e-07
1.969191.5635053.873267e-07
1.971.5634943.880000e-07
1.978551.5633784.229524e-07
1.987961.563254.614169e-07
1.997421.5631215.000644e-07
2.006921.562995.388957e-07
2.016471.5628595.779117e-07
2.026061.5627266.171133e-07
2.03571.5625926.565014e-07
2.045381.5624576.960769e-07
2.055111.5623217.358406e-07
2.064891.5621847.757935e-07
2.074711.5620468.159364e-07
2.084581.5619068.562703e-07
2.09451.5617658.967961e-07
2.104461.5616239.375146e-07
2.114471.561489.784269e-07
2.124531.5613351.019534e-06
2.134641.5611891.060836e-06
2.144791.5610421.102335e-06
2.1551.5608941.144031e-06
2.165251.5607441.185926e-06
2.175551.5605931.228020e-06
2.18591.560441.270314e-06
2.196291.5602871.312809e-06
2.206741.5601311.355507e-06
2.217241.5599751.398408e-06
2.227791.5598161.441512e-06
2.238381.5596571.484822e-06
2.249031.5594961.528338e-06
2.259731.5593331.572061e-06
2.270481.5591691.615991e-06
2.281281.5590041.660131e-06
2.292131.5588371.704481e-06
2.303041.5586681.749042e-06
2.313991.5584981.793814e-06
2.3251.5583261.838800e-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
—