Optical constants

Refractive index of J-BASF6 (HIKARI)

J-BASF6: 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
1.66755
Extinction coefficient k
3.86531e-08
Permittivity ε1
2.78071
Permittivity ε2
1.28912e-07
Absorption coefficient α
0.00826632 cm⁻¹
Penetration depth δ = λ/(2πk)
2.41946e+09 nm
Abbe number Vd
41.874
Chromatic dispersion dn/dλ
-0.0811931 µm⁻¹
Group index ng
1.71526
Group velocity dispersion
153.113 fs²/mm
Dispersion parameter D
-835.313 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-BASF6 (HIKARI): J-BASF6
hikari_j_basf6 = ls.fetch_refractiveindex("specs", "HIKARI-optical", "J-BASF6", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_j_basf6.range_nm)  # (365.015, 2058.09) nm
eps = hikari_j_basf6.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=2.71408053−0.011443869⁢λ2.0−0.000185062065⁢λ4.0+0.0232439131⁢λ−2.0+0.000130291556⁢λ−4.0+0.00011814346⁢λ−6.0−1.18586652×10-5⁢λ−8.0+7.68022789×10-7⁢λ−10.0

Valid from 0.365015 to 2.05809 µm.

Coefficients as stored
CiValue
C12.71408053
C2-0.011443869
C32.0
C4-0.000185062065
C54.0
C60.0232439131
C7-2.0
C80.000130291556
C9-4.0
C100.00011814346
C11-6.0
C12-1.18586652e-05
C13-8.0
C147.68022789e-07
C15-10.0

Comments and conditions

Conditions

temperature
296 K

Properties

thermal dispersion
type: formula A, coefficients: 3.8727e-07 1.2554e-08 -1.9116e-12 6.539e-07 8.3535e-10 0.24661
nd
1.667550
Vd
41.873908
density
value: 3210
thermal expansion
value: 6.6e-06, temperature range: 243 343
dPgF
0.001
resistance
phosphate: 2.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 296.0 K): dn/dT = 1.23e-06 K⁻¹ at 633 nm, dn/dT = 4.06e-07 K⁻¹ at 1310 nm, dn/dT = 3.44e-07 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-BASF6 (HIKARI), J-BASF6: n and k versus wavelength
λ (µm)nk
0.3650151.7102523.398454e-06
0.3666011.7095443.044713e-06
0.3681931.7088462.689436e-06
0.3697931.7081592.332616e-06
0.371.7080712.286400e-06
0.3713991.7074822.129651e-06
0.3730131.7068151.948913e-06
0.3746331.7061581.767390e-06
0.3762611.7055091.585078e-06
0.3778951.7048711.401974e-06
0.3795371.7042411.218074e-06
0.381.7040651.166200e-06
0.3811861.703621.105465e-06
0.3828421.7030071.020644e-06
0.3845051.7024039.354536e-07
0.3861751.7018078.498935e-07
0.3878531.7012197.639616e-07
0.3895381.700646.776565e-07
0.391.7004826.539800e-07
0.391231.7000686.235901e-07
0.392931.6995035.815982e-07
0.3946371.6989465.394239e-07
0.3963511.6983964.970664e-07
0.3980731.6978544.545249e-07
0.3998021.6973184.117985e-07
0.41.6972574.069100e-07
0.4015391.6967893.920597e-07
0.4032831.6962673.752273e-07
0.4050351.6957523.583218e-07
0.4067951.6952433.413428e-07
0.4085621.694743.242901e-07
0.4103371.6942443.071633e-07
0.412121.6937542.899621e-07
0.413911.6932692.726862e-07
0.4157081.6927912.553352e-07
0.4175141.6923192.379089e-07
0.4193281.6918522.204068e-07
0.421.6916812.139200e-07
0.4211491.6913912.096310e-07
0.4229791.6909352.028039e-07
0.4248171.6904851.959472e-07
0.4266621.690041.890607e-07
0.4285161.6896011.821443e-07
0.4303771.6891661.751979e-07
0.4322471.6887371.682212e-07
0.4341251.6883121.612143e-07
0.436011.6878931.541769e-07
0.4379051.6874781.471089e-07
0.4398071.6870681.400103e-07
0.441.6870271.392900e-07
0.4417181.6866631.359321e-07
0.4436371.6862621.321806e-07
0.4455641.6858661.284128e-07
0.4474991.6854741.246286e-07
0.4494431.6850871.208280e-07
0.4513961.6847041.170109e-07
0.4533571.6843251.131772e-07
0.4553261.6839511.093269e-07
0.4573041.683581.054598e-07
0.4592911.6832141.015759e-07
0.461.6830851.001900e-07
0.4612861.6828529.845876e-08
0.463291.6824939.576177e-08
0.4653031.6821399.305305e-08
0.4673241.6817889.033257e-08
0.4693541.6814418.760027e-08
0.4713931.6810988.485611e-08
0.4734411.6807598.210002e-08
0.4754981.6804237.933195e-08
0.4775641.680097.655186e-08
0.4796381.6797627.375970e-08
0.481.6797057.327300e-08
0.4817221.6794367.179420e-08
0.4838151.6791146.999709e-08
0.4859171.6787966.819216e-08
0.4880271.678486.637940e-08
0.4901481.6781686.455876e-08
0.4922771.677866.273021e-08
0.4944151.6775546.089371e-08
0.4965631.6772525.904924e-08
0.4987211.6769525.719676e-08
0.51.6767775.609800e-08
0.5008871.6766565.580475e-08
0.5030631.6763635.508542e-08
0.5052481.6760725.436296e-08
0.5074431.6757855.363736e-08
0.5096481.67555.290862e-08
0.5118621.6752195.217670e-08
0.5140861.674945.144161e-08
0.5163191.6746645.070332e-08
0.5185621.6743914.996183e-08
0.5208151.674124.921711e-08
0.5230771.6738524.846916e-08
0.5253491.6735874.771796e-08
0.5276321.6733244.696350e-08
0.5299241.6730644.620576e-08
0.5322261.6728074.544473e-08
0.5345381.6725524.468039e-08
0.536861.6722994.391273e-08
0.5391931.6720494.314173e-08
0.5415351.6718014.236739e-08
0.5438871.6715564.158968e-08
0.546251.6713134.080860e-08
0.5486231.6710724.002412e-08
0.551.6709343.956900e-08
0.5510071.6708343.954448e-08
0.55341.6705973.948617e-08
0.5558041.6703633.942760e-08
0.5582191.6701323.936879e-08
0.5606441.6699023.930971e-08
0.563081.6696753.925038e-08
0.5655261.6694493.919079e-08
0.5679821.6692263.913095e-08
0.570451.6690053.907084e-08
0.5729281.6687863.901047e-08
0.5754171.6685693.894984e-08
0.5779171.6683543.888895e-08
0.5804271.668143.882779e-08
0.5829491.6679293.876636e-08
0.5854811.667723.870467e-08
0.5880251.6675123.864271e-08
0.5905791.6673073.858049e-08
0.5931451.6671033.851799e-08
0.5957221.6669013.845522e-08
0.598311.6667013.839218e-08
0.61.6665723.835100e-08
0.6009091.6665033.840910e-08
0.6035191.6663063.857596e-08
0.6061411.6661113.874355e-08
0.6087741.6659183.891186e-08
0.6114191.6657273.908091e-08
0.6140751.6655373.925069e-08
0.6167431.6653493.942121e-08
0.6194221.6651623.959247e-08
0.6221131.6649773.976447e-08
0.6248161.6647943.993722e-08
0.627531.6646124.011072e-08
0.6302561.6644324.028498e-08
0.6329941.6642534.045999e-08
0.6357441.6640764.063576e-08
0.6385061.66394.081230e-08
0.641281.6637264.098960e-08
0.6440661.6635534.116767e-08
0.6468641.6633824.134652e-08
0.6496741.6632124.152614e-08
0.651.6631924.154700e-08
0.6524961.6630434.142634e-08
0.6553311.6628764.128932e-08
0.6581781.662714.115170e-08
0.6610371.6625464.101348e-08
0.6639081.6623834.087466e-08
0.6667931.6622214.073524e-08
0.6696891.6620614.059522e-08
0.6725991.6619014.045458e-08
0.6755211.6617434.031334e-08
0.6784551.6615874.017148e-08
0.6814031.6614314.002900e-08
0.6843631.6612773.988591e-08
0.6873361.6611243.974219e-08
0.6903221.6609723.959785e-08
0.6933211.6608213.945288e-08
0.6963331.6606723.930728e-08
0.6993581.6605233.916105e-08
0.71.6604923.913000e-08
0.7023961.6603764.003383e-08
0.7054471.660234.118499e-08
0.7085121.6600854.234115e-08
0.711591.6599414.350234e-08
0.7146811.6597984.466857e-08
0.7177861.6596564.583986e-08
0.7209041.6595154.701624e-08
0.7240361.6593754.819774e-08
0.7271811.6592374.938436e-08
0.730341.6590995.057615e-08
0.7335131.6589625.177310e-08
0.73671.6588265.297526e-08
0.73991.6586915.418264e-08
0.7431141.6585575.539527e-08
0.7463421.6584245.661316e-08
0.7495851.6582925.783635e-08
0.7528411.6581615.906485e-08
0.7561121.6580316.029868e-08
0.7593961.6579026.153788e-08
0.7626951.6577736.278246e-08
0.7660091.6576466.403244e-08
0.7693361.6575196.528786e-08
0.7726791.6573936.654873e-08
0.7760351.6572686.781508e-08
0.7794071.6571446.908693e-08
0.7827931.657027.036430e-08
0.7861931.6568987.164722e-08
0.7896091.6567767.293572e-08
0.7930391.6566557.422981e-08
0.7964841.6565357.552953e-08
0.7999441.6564157.683489e-08
0.81.6564137.685600e-08
0.8034191.6562967.447315e-08
0.8069091.6561787.204079e-08
0.8104151.6560616.959786e-08
0.8139351.6559446.714432e-08
0.8174711.6558286.468012e-08
0.8210231.6557136.220521e-08
0.8245891.6555985.971955e-08
0.8281721.6554845.722310e-08
0.8317691.6553715.471579e-08
0.8353831.6552595.219760e-08
0.8390121.6551474.966847e-08
0.8426571.6550354.712835e-08
0.8463171.6549254.457719e-08
0.8499941.6548154.201496e-08
0.8536871.6547053.944159e-08
0.8573951.6545963.685704e-08
0.861121.6544883.426126e-08
0.8648611.654383.165421e-08
0.8686181.6542732.903583e-08
0.8723911.6541662.640608e-08
0.8761811.654062.376490e-08
0.8799881.6539542.111225e-08
0.8838111.6538491.844807e-08
0.887651.6537451.577232e-08
0.8915061.6536411.308495e-08
0.8953791.6535371.038590e-08
0.8992691.6534347.675131e-09
0.91.6534157.165600e-09
0.9031751.6533327.950882e-09
0.9070991.653238.921166e-09
0.911041.6531289.895665e-09
0.9149981.6530271.087440e-08
0.9189721.6529261.185738e-08
0.9229651.6528261.284464e-08
0.9269741.6527261.383618e-08
0.9310011.6526271.483203e-08
0.9350461.6525281.583221e-08
0.9391081.6524291.683673e-08
0.9431881.6523311.784562e-08
0.9472851.6522331.885889e-08
0.95141.6521351.987656e-08
0.9555331.6520382.089865e-08
0.9596841.6519422.192518e-08
0.9638531.6518452.295618e-08
0.9680411.6517492.399165e-08
0.9722461.6516542.503162e-08
0.976471.6515582.607610e-08
0.9807121.6514632.712513e-08
0.9849721.6513682.817871e-08
0.9892511.6512742.923687e-08
0.9935491.651183.029962e-08
0.9978651.6510863.136699e-08
11.651043.189500e-08
1.00221.6509933.175446e-08
1.006551.6508993.147632e-08
1.010931.6508063.119697e-08
1.015321.6507143.091641e-08
1.019731.6506213.063463e-08
1.024161.6505293.035162e-08
1.028611.6504373.006738e-08
1.033081.6503452.978191e-08
1.037561.6502532.949520e-08
1.042071.6501622.920724e-08
1.04661.6500712.891804e-08
1.051151.649982.862757e-08
1.055711.6498892.833585e-08
1.06031.6497992.804285e-08
1.06491.6497082.774859e-08
1.069531.6496182.745304e-08
1.074181.6495282.715621e-08
1.078841.6494382.685810e-08
1.083531.6493482.655868e-08
1.088241.6492592.625797e-08
1.092961.6491692.595595e-08
1.097711.649082.565262e-08
1.102481.6489912.534797e-08
1.107271.6489012.504200e-08
1.112081.6488122.473469e-08
1.116911.6487232.442606e-08
1.121761.6486352.411608e-08
1.126641.6485462.380475e-08
1.131531.6484572.349208e-08
1.136451.6483682.317804e-08
1.141381.648282.286264e-08
1.146341.6481912.254587e-08
1.151321.6481032.222772e-08
1.156321.6480142.190819e-08
1.161351.6479262.158728e-08
1.166391.6478372.126497e-08
1.171461.6477492.094126e-08
1.176551.6476612.061614e-08
1.181661.6475722.028961e-08
1.186791.6474841.996166e-08
1.191951.6473951.963229e-08
1.197131.6473071.930149e-08
1.21.6472581.911800e-08
1.202331.6472181.993723e-08
1.207551.647132.177494e-08
1.21281.6470412.362062e-08
1.218071.6469532.547433e-08
1.223361.6468642.733609e-08
1.228671.6467752.920593e-08
1.234011.6466873.108390e-08
1.239371.6465983.297003e-08
1.244751.6465093.486435e-08
1.250161.646423.676690e-08
1.255591.646333.867771e-08
1.261051.6462414.059683e-08
1.266531.6461524.252428e-08
1.272031.6460624.446011e-08
1.277551.6459724.640435e-08
1.28311.6458834.835703e-08
1.288681.6457935.031819e-08
1.294281.6457035.228788e-08
1.29991.6456125.426612e-08
1.305551.6455225.625296e-08
1.311221.6454315.824842e-08
1.316911.645346.025256e-08
1.322641.6452496.226540e-08
1.328381.6451586.428699e-08
1.334151.6450676.631736e-08
1.339951.6449756.835655e-08
1.345771.6448837.040460e-08
1.351621.6447917.246154e-08
1.357491.6446997.452742e-08
1.363381.6446067.660228e-08
1.369311.6445137.868615e-08
1.375261.644428.077907e-08
1.381231.6443278.288108e-08
1.387231.6442338.499223e-08
1.393261.6441398.711255e-08
1.399311.6440458.924208e-08
1.41.6440348.948500e-08
1.405391.643959.052161e-08
1.411491.6438559.169612e-08
1.417631.643769.287574e-08
1.423781.6436649.406048e-08
1.429971.6435699.525037e-08
1.436181.6434729.644543e-08
1.442421.6433769.764567e-08
1.448691.6432799.885114e-08
1.454981.6431821.000618e-07
1.46131.6430841.012778e-07
1.467651.6429861.024990e-07
1.474031.6428871.037256e-07
1.480431.6427881.049575e-07
1.486861.6426891.061947e-07
1.493321.6425891.074373e-07
1.499811.6424891.086853e-07
1.506321.6423891.099387e-07
1.512871.6422881.111976e-07
1.519441.6421861.124619e-07
1.526041.6420841.137317e-07
1.532671.6419821.150071e-07
1.539331.6418791.162880e-07
1.546011.6417751.175744e-07
1.552731.6416721.188665e-07
1.559481.6415671.201641e-07
1.566251.6414621.214674e-07
1.573051.6413571.227763e-07
1.579891.6412511.240910e-07
1.586751.6411441.254113e-07
1.593641.6410371.267374e-07
1.61.6409381.279600e-07
1.600571.6409291.284599e-07
1.607521.6408211.345805e-07
1.61451.6407121.407277e-07
1.621521.6406031.469016e-07
1.628561.6404931.531023e-07
1.635641.6403821.593299e-07
1.642741.6402711.655846e-07
1.649881.6401591.718665e-07
1.657051.6400461.781756e-07
1.664251.6399331.845122e-07
1.671481.6398191.908763e-07
1.678741.6397041.972680e-07
1.686031.6395892.036876e-07
1.693351.6394732.101350e-07
1.700711.6393562.166104e-07
1.70811.6392392.231139e-07
1.715521.639122.296457e-07
1.722971.6390022.362059e-07
1.730461.6388822.427945e-07
1.737971.6387612.494118e-07
1.745521.638642.560578e-07
1.753111.6385182.627327e-07
1.760721.6383952.694366e-07
1.768371.6382722.761697e-07
1.776051.6381472.829320e-07
1.783771.6380222.897236e-07
1.791521.6378962.965448e-07
1.79931.6377693.033956e-07
1.81.6377573.040100e-07
1.807121.6376413.151352e-07
1.814971.6375123.274045e-07
1.822851.6373833.397270e-07
1.830771.6372523.521030e-07
1.838731.6371213.645329e-07
1.846711.6369883.770167e-07
1.854741.6368553.895547e-07
1.862791.6367214.021473e-07
1.870891.6365854.147945e-07
1.879011.6364494.274967e-07
1.887181.6363124.402540e-07
1.895371.6361734.530668e-07
1.903611.6360344.659352e-07
1.911881.6358944.788595e-07
1.920181.6357524.918400e-07
1.928531.635615.048769e-07
1.93691.6354665.179704e-07
1.945321.6353225.311208e-07
1.953771.6351765.443283e-07
1.962261.6350295.575932e-07
1.970781.6348815.709157e-07
1.979341.6347325.842961e-07
1.987941.6345825.977346e-07
1.996581.634436.112315e-07
21.634376.165800e-07
2.005251.6342776.539597e-07
2.013961.6341237.159675e-07
2.022711.6339687.782446e-07
2.03151.6338128.407923e-07
2.040321.6336549.036117e-07
2.049191.6334959.667040e-07
2.058091.6333351.030070e-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
—