Optical constants

Refractive index of J-BASF8 (HIKARI)

J-BASF8: n,k 0.365–2.058 µm

Data
formula 3 + tabulated k
Range
0.365–2.058 µm
Temperature
296 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.365–2.058 µm
Refractive index n
1.72342
Extinction coefficient k
3.75584e-08
Permittivity ε1
2.97016
Permittivity ε2
1.29457e-07
Absorption coefficient α
0.00803221 cm⁻¹
Penetration depth δ = λ/(2πk)
2.48997e+09 nm
Abbe number Vd
38.03
Chromatic dispersion dn/dλ
-0.0965028 µm⁻¹
Group index ng
1.78012
Group velocity dispersion
186.965 fs²/mm
Dispersion parameter D
-1019.99 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

# J-BASF8 (HIKARI): J-BASF8
hikari_j_basf8 = ls.fetch_refractiveindex("specs", "HIKARI-optical", "J-BASF8", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_j_basf8.range_nm)  # (365.015, 2058.09) nm
eps = hikari_j_basf8.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=2.88696022−0.0105560202⁢λ2.0−0.000102521932⁢λ4.0+0.0280905311⁢λ−2.0+0.000399098561⁢λ−4.0+0.000115091109⁢λ−6.0−1.16375905×10-5⁢λ−8.0+8.75066077×10-7⁢λ−10.0

Valid from 0.365015 to 2.05809 µm.

Coefficients as stored
CiValue
C12.88696022
C2-0.0105560202
C32.0
C4-0.000102521932
C54.0
C60.0280905311
C7-2.0
C80.000399098561
C9-4.0
C100.000115091109
C11-6.0
C12-1.16375905e-05
C13-8.0
C148.75066077e-07
C15-10.0

Comments and conditions

Conditions

temperature
296 K

Properties

thermal dispersion
type: formula A, coefficients: 2.5871e-06 1.1642e-08 -2.8949e-13 7.8847e-07 1.0939e-09 0.24783
nd
1.723420
Vd
38.029744
density
value: 3610
thermal expansion
value: 6.9e-06, temperature range: 243 343
dPgF
0.0024
resistance
phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 296.0 K): dn/dT = 2.79e-06 K⁻¹ at 633 nm, dn/dT = 1.70e-06 K⁻¹ at 1310 nm, dn/dT = 1.62e-06 K⁻¹ at 1550 nm

References

Cite

NIKON Zemax catalog 2017-11 (obtained from http://www.nikon.com); See also HIKARI 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 421 wavelengths, the same grid as the API and the library
J-BASF8 (HIKARI), J-BASF8: n and k versus wavelength
λ (µm)nk
0.3650151.7752293.130222e-06
0.3666011.7743582.783713e-06
0.3681931.77352.435698e-06
0.3697931.7726552.086171e-06
0.371.7725472.040900e-06
0.3713991.7718221.888485e-06
0.3730131.7710031.712743e-06
0.3746331.7701951.536239e-06
0.3762611.7693991.358967e-06
0.3778951.7686151.180925e-06
0.3795371.7678421.002110e-06
0.381.7676269.516700e-07
0.3811861.767089.029893e-07
0.3828421.7663298.350022e-07
0.3845051.7655887.667197e-07
0.3861751.7648586.981406e-07
0.3878531.7641396.292636e-07
0.3895381.7634295.600874e-07
0.391.7632365.411100e-07
0.391231.7627285.140682e-07
0.392931.7620384.767026e-07
0.3946371.7613564.391747e-07
0.3963511.7606844.014838e-07
0.3980731.7600213.636291e-07
0.3998021.7593673.256100e-07
0.41.7592933.212600e-07
0.4015391.7587213.083811e-07
0.4032831.7580842.937833e-07
0.4050351.7574552.791220e-07
0.4067951.7568342.643971e-07
0.4085621.7562212.496081e-07
0.4103371.7556162.347550e-07
0.412121.7550182.198373e-07
0.413911.7544282.048548e-07
0.4157081.7538461.898072e-07
0.4175141.753271.746943e-07
0.4193281.7527021.595157e-07
0.421.7524941.538900e-07
0.4211491.7521411.511751e-07
0.4229791.7515871.468536e-07
0.4248171.751041.425134e-07
0.4266621.7504991.381543e-07
0.4285161.7499651.337763e-07
0.4303771.7494371.293793e-07
0.4322471.7489151.249632e-07
0.4341251.74841.205278e-07
0.436011.7478911.160733e-07
0.4379051.7473881.115993e-07
0.4398071.746891.071059e-07
0.441.746841.066500e-07
0.4417181.7463991.044842e-07
0.4436371.7459131.020645e-07
0.4455641.7454339.963435e-08
0.4474991.7449589.719361e-08
0.4494431.7444899.474227e-08
0.4513961.7440259.228029e-08
0.4533571.7435678.980760e-08
0.4553261.7431148.732417e-08
0.4573041.7426668.482996e-08
0.4592911.7422228.232491e-08
0.461.7420668.143100e-08
0.4612861.7417848.040597e-08
0.463291.7413517.880913e-08
0.4653031.7409237.720536e-08
0.4673241.7404997.559462e-08
0.4693541.740087.397688e-08
0.4713931.7396667.235212e-08
0.4734411.7392567.072029e-08
0.4754981.738856.908138e-08
0.4775641.7384496.743535e-08
0.4796381.7380536.578216e-08
0.481.7379846.549400e-08
0.4817221.7376616.433774e-08
0.4838151.7372726.293259e-08
0.4859171.7368896.152133e-08
0.4880271.7365096.010394e-08
0.4901481.7361335.868040e-08
0.4922771.7357615.725067e-08
0.4944151.7353935.581473e-08
0.4965631.7350295.437255e-08
0.4987211.7346695.292411e-08
0.51.7344585.206500e-08
0.5008871.7343135.176499e-08
0.5030631.733965.102908e-08
0.5052481.7336115.028997e-08
0.5074431.7332664.954765e-08
0.5096481.7329244.880210e-08
0.5118621.7325864.805332e-08
0.5140861.7322514.730128e-08
0.5163191.731924.654597e-08
0.5185621.7315924.578739e-08
0.5208151.7312684.502551e-08
0.5230771.7309464.426031e-08
0.5253491.7306284.349180e-08
0.5276321.7303134.271995e-08
0.5299241.7300024.194474e-08
0.5322261.7296934.116616e-08
0.5345381.7293884.038421e-08
0.536861.7290853.959885e-08
0.5391931.7287863.881009e-08
0.5415351.728493.801789e-08
0.5438871.7281963.722226e-08
0.546251.7279063.642317e-08
0.5486231.7276183.562061e-08
0.551.7274533.515500e-08
0.5510071.7273333.521934e-08
0.55341.7270513.537235e-08
0.5558041.7267723.552602e-08
0.5582191.7264953.568036e-08
0.5606441.7262213.583536e-08
0.563081.725953.599105e-08
0.5655261.7256813.614740e-08
0.5679821.7254153.630444e-08
0.570451.7251523.646216e-08
0.5729281.724893.662057e-08
0.5754171.7246323.677966e-08
0.5779171.7243763.693944e-08
0.5804271.7241223.709992e-08
0.5829491.7238713.726109e-08
0.5854811.7236223.742297e-08
0.5880251.7233753.758555e-08
0.5905791.7231313.774883e-08
0.5931451.7228893.791283e-08
0.5957221.7226493.807753e-08
0.598311.7224123.824296e-08
0.61.7222583.835100e-08
0.6009091.7221773.840910e-08
0.6035191.7219433.857596e-08
0.6061411.7217123.874355e-08
0.6087741.7214833.891186e-08
0.6114191.7212573.908091e-08
0.6140751.7210323.925069e-08
0.6167431.7208093.942121e-08
0.6194221.7205883.959247e-08
0.6221131.720373.976447e-08
0.6248161.7201533.993722e-08
0.627531.7199384.011072e-08
0.6302561.7197254.028498e-08
0.6329941.7195144.045999e-08
0.6357441.7193054.063576e-08
0.6385061.7190984.081230e-08
0.641281.7188924.098960e-08
0.6440661.7186894.116767e-08
0.6468641.7184874.134652e-08
0.6496741.7182874.152614e-08
0.651.7182644.154700e-08
0.6524961.7180884.170654e-08
0.6553311.7178924.188773e-08
0.6581781.7176974.206971e-08
0.6610371.7175034.225247e-08
0.6639081.7173124.243603e-08
0.6667931.7171224.262039e-08
0.6696891.7169334.280554e-08
0.6725991.7167474.299151e-08
0.6755211.7165614.317827e-08
0.6784551.7163784.336586e-08
0.6814031.7161964.355425e-08
0.6843631.7160154.374347e-08
0.6873361.7158364.393350e-08
0.6903221.7156584.412436e-08
0.6933211.7154824.431605e-08
0.6963331.7153084.450858e-08
0.6993581.7151344.470194e-08
0.71.7150984.474300e-08
0.7023961.7149624.520392e-08
0.7054471.7147924.579098e-08
0.7085121.7146234.638058e-08
0.711591.7144554.697275e-08
0.7146811.7142894.756748e-08
0.7177861.7141244.816480e-08
0.7209041.713964.876472e-08
0.7240361.7137984.936724e-08
0.7271811.7136364.997238e-08
0.730341.7134765.058015e-08
0.7335131.7133185.119056e-08
0.73671.713165.180362e-08
0.73991.7130045.241935e-08
0.7431141.7128495.303774e-08
0.7463421.7126955.365883e-08
0.7495851.7125435.428261e-08
0.7528411.7123915.490911e-08
0.7561121.7122415.553832e-08
0.7593961.7120925.617027e-08
0.7626951.7119445.680496e-08
0.7660091.7117975.744241e-08
0.7693361.7116515.808263e-08
0.7726791.7115065.872564e-08
0.7760351.7113625.937143e-08
0.7794071.7112196.002003e-08
0.7827931.7110786.067145e-08
0.7861931.7109376.132570e-08
0.7896091.7107976.198279e-08
0.7930391.7106586.264273e-08
0.7964841.7105216.330554e-08
0.7999441.7103846.397124e-08
0.81.7103826.398200e-08
0.8034191.7102486.277581e-08
0.8069091.7101136.154456e-08
0.8104151.7099796.030796e-08
0.8139351.7098465.906599e-08
0.8174711.7097145.781862e-08
0.8210231.7095835.656583e-08
0.8245891.7094535.530760e-08
0.8281721.7093235.404390e-08
0.8317691.7091955.277472e-08
0.8353831.7090675.150002e-08
0.8390121.708945.021978e-08
0.8426571.7088144.893398e-08
0.8463171.7086894.764260e-08
0.8499941.7085644.634560e-08
0.8536871.7084414.504297e-08
0.8573951.7083184.373469e-08
0.861121.7081954.242071e-08
0.8648611.7080744.110104e-08
0.8686181.7079533.977562e-08
0.8723911.7078333.844445e-08
0.8761811.7077143.710750e-08
0.8799881.7075963.576474e-08
0.8838111.7074783.441614e-08
0.887651.7073613.306169e-08
0.8915061.7072453.170135e-08
0.8953791.7071293.033510e-08
0.8992691.7070142.896292e-08
0.91.7069922.870500e-08
0.9031751.7068992.906015e-08
0.9070991.7067862.949896e-08
0.911041.7066722.993969e-08
0.9149981.706563.038232e-08
0.9189721.7064483.082688e-08
0.9229651.7063373.127337e-08
0.9269741.7062263.172181e-08
0.9310011.7061163.217218e-08
0.9350461.7060063.262452e-08
0.9391081.7058973.307882e-08
0.9431881.7057893.353509e-08
0.9472851.7056813.399335e-08
0.95141.7055743.445360e-08
0.9555331.7054673.491584e-08
0.9596841.705363.538010e-08
0.9638531.7052553.584637e-08
0.9680411.7051493.631467e-08
0.9722461.7050453.678500e-08
0.976471.704943.725737e-08
0.9807121.7048363.773180e-08
0.9849721.7047333.820829e-08
0.9892511.704633.868685e-08
0.9935491.7045283.916748e-08
0.9978651.7044263.965021e-08
11.7043753.988900e-08
1.00221.7043243.966054e-08
1.006551.7042233.920837e-08
1.010931.7041223.875425e-08
1.015321.7040223.829815e-08
1.019731.7039223.784007e-08
1.024161.7038223.737999e-08
1.028611.7037233.691792e-08
1.033081.7036243.645385e-08
1.037561.7035263.598775e-08
1.042071.7034273.551963e-08
1.04661.703333.504948e-08
1.051151.7032323.457729e-08
1.055711.7031353.410304e-08
1.06031.7030383.362674e-08
1.06491.7029423.314836e-08
1.069531.7028463.266791e-08
1.074181.702753.218537e-08
1.078841.7026543.170073e-08
1.083531.7025593.121399e-08
1.088241.7024643.072513e-08
1.092961.7023693.023415e-08
1.097711.7022752.974104e-08
1.102481.702182.924578e-08
1.107271.7020862.874838e-08
1.112081.7019932.824881e-08
1.116911.7018992.774707e-08
1.121761.7018062.724315e-08
1.126641.7017132.673704e-08
1.131531.701622.622874e-08
1.136451.7015272.571823e-08
1.141381.7014352.520549e-08
1.146341.7013422.469053e-08
1.151321.701252.417334e-08
1.156321.7011582.365390e-08
1.161351.7010662.313220e-08
1.166391.7009752.260823e-08
1.171461.7008832.208199e-08
1.176551.7007922.155346e-08
1.181661.7007012.102264e-08
1.186791.7006092.048951e-08
1.191951.7005181.995406e-08
1.197131.7004271.941629e-08
1.21.7003771.911800e-08
1.202331.7003371.941529e-08
1.207551.7002462.008216e-08
1.21281.7001552.075193e-08
1.218071.7000652.142460e-08
1.223361.6999742.210021e-08
1.228671.6998842.277874e-08
1.234011.6997932.346022e-08
1.239371.6997032.414467e-08
1.244751.6996132.483208e-08
1.250161.6995222.552249e-08
1.255591.6994322.621589e-08
1.261051.6993422.691231e-08
1.266531.6992522.761175e-08
1.272031.6991622.831423e-08
1.277551.6990712.901976e-08
1.28311.6989812.972835e-08
1.288681.6988913.044003e-08
1.294281.6988013.115479e-08
1.29991.698713.187266e-08
1.305551.698623.259365e-08
1.311221.698533.331777e-08
1.316911.6984393.404504e-08
1.322641.6983493.477547e-08
1.328381.6982583.550907e-08
1.334151.6981683.624585e-08
1.339951.6980773.698584e-08
1.345771.6979863.772904e-08
1.351621.6978953.847547e-08
1.357491.6978043.922515e-08
1.363381.6977133.997808e-08
1.369311.6976224.073428e-08
1.375261.697534.149376e-08
1.381231.6974394.225655e-08
1.387231.6973474.302265e-08
1.393261.6972554.379208e-08
1.399311.6971634.456485e-08
1.41.6971534.465300e-08
1.405391.6970714.655128e-08
1.411491.6969794.870210e-08
1.417631.6968865.086226e-08
1.423781.6967935.303181e-08
1.429971.69675.521078e-08
1.436181.6966075.739922e-08
1.442421.6965145.959716e-08
1.448691.696426.180465e-08
1.454981.6963276.402174e-08
1.46131.6962336.624845e-08
1.467651.6961386.848484e-08
1.474031.6960447.073094e-08
1.480431.6959497.298680e-08
1.486861.6958547.525246e-08
1.493321.6957597.752797e-08
1.499811.6956637.981335e-08
1.506321.6955678.210867e-08
1.512871.6954718.441396e-08
1.519441.6953748.672926e-08
1.526041.6952788.905462e-08
1.532671.695189.139008e-08
1.539331.6950839.373569e-08
1.546011.6949859.609149e-08
1.552731.6948879.845752e-08
1.559481.6947881.008338e-07
1.566251.694691.032205e-07
1.573051.694591.056175e-07
1.579891.6944911.080249e-07
1.586751.6943911.104428e-07
1.593641.694291.128711e-07
1.61.6941981.151100e-07
1.600571.6941891.155219e-07
1.607521.6940881.205655e-07
1.61451.6939861.256309e-07
1.621521.6938841.307184e-07
1.628561.6937821.358279e-07
1.635641.6936791.409597e-07
1.642741.6935751.461137e-07
1.649881.6934711.512901e-07
1.657051.6933671.564891e-07
1.664251.6932621.617106e-07
1.671481.6931571.669547e-07
1.678741.6930511.722217e-07
1.686031.6929441.775116e-07
1.693351.6928371.828244e-07
1.700711.692731.881603e-07
1.70811.6926221.935194e-07
1.715521.6925131.989018e-07
1.722971.6924042.043075e-07
1.730461.6922942.097368e-07
1.737971.6921842.151896e-07
1.745521.6920732.206661e-07
1.753111.6919622.261664e-07
1.760721.691852.316906e-07
1.768371.6917372.372388e-07
1.776051.6916242.428111e-07
1.783771.691512.484076e-07
1.791521.6913952.540284e-07
1.79931.691282.596737e-07
1.81.691272.601800e-07
1.807121.6911642.675901e-07
1.814971.6910482.757621e-07
1.822851.690932.839696e-07
1.830771.6908132.922128e-07
1.838731.6906943.004918e-07
1.846711.6905743.088067e-07
1.854741.6904543.171578e-07
1.862791.6903343.255452e-07
1.870891.6902123.339690e-07
1.879011.690093.424294e-07
1.887181.6899663.509265e-07
1.895371.6898433.594606e-07
1.903611.6897183.680317e-07
1.911881.6895923.766401e-07
1.920181.6894663.852858e-07
1.928531.6893393.939692e-07
1.93691.6892114.026902e-07
1.945321.6890824.114491e-07
1.953771.6889524.202461e-07
1.962261.6888224.290813e-07
1.970781.688694.379549e-07
1.979341.6885584.468670e-07
1.987941.6884254.558179e-07
1.996581.6882914.648076e-07
21.6882374.683700e-07
2.005251.6881554.874595e-07
2.013961.6880195.191263e-07
2.022711.6878825.509307e-07
2.03151.6877445.828732e-07
2.040321.6876056.149545e-07
2.049191.6874656.471752e-07
2.058091.6873246.795359e-07

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
—