Optical constants

Refractive index of J-BASF2 (HIKARI)

J-BASF2: 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
1.66446
Extinction coefficient k
3.64647e-08
Permittivity ε1
2.77042
Permittivity ε2
1.21388e-07
Absorption coefficient α
0.00779832 cm⁻¹
Penetration depth δ = λ/(2πk)
2.56466e+09 nm
Abbe number Vd
35.87
Chromatic dispersion dn/dλ
-0.0937573 µm⁻¹
Group index ng
1.71955
Group velocity dispersion
183.056 fs²/mm
Dispersion parameter D
-998.668 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-BASF2 (HIKARI): J-BASF2
hikari_j_basf2 = ls.fetch_refractiveindex("specs", "HIKARI-optical", "J-BASF2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_j_basf2.range_nm)  # (365.015, 2058.09) nm
eps = hikari_j_basf2.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=2.69527127−0.0109541476⁢λ2.0+0.0234490053⁢λ−2.0+0.0019016356⁢λ−4.0−0.000368276327⁢λ−6.0+7.49770823×10-5⁢λ−8.0−7.0943249×10-6⁢λ−10.0+3.01058679×10-7⁢λ−12.0

Valid from 0.365015 to 2.05809 µm.

Coefficients as stored
CiValue
C12.69527127
C2-0.0109541476
C32.0
C40.0234490053
C5-2.0
C60.0019016356
C7-4.0
C8-0.000368276327
C9-6.0
C107.49770823e-05
C11-8.0
C12-7.0943249e-06
C13-10.0
C143.01058679e-07
C15-12.0

Comments and conditions

Conditions

temperature
296 K

Properties

thermal dispersion
type: formula A, coefficients: -2.6152e-06 1.1055e-08 -2.485e-12 7.8656e-07 1.133e-09 0.26477
nd
1.664460
Vd
35.870305
density
value: 3080
thermal expansion
value: 8.4e-06, temperature range: 243 343
dPgF
0.0048
resistance
phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 296.0 K): dn/dT = -1.25e-07 K⁻¹ at 633 nm, dn/dT = -1.10e-06 K⁻¹ at 1310 nm, dn/dT = -1.17e-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-BASF2 (HIKARI), J-BASF2: n and k versus wavelength
λ (µm)nk
0.3650151.7158094.263449e-06
0.3666011.7149213.697730e-06
0.3681931.7140483.129555e-06
0.3697931.713192.558911e-06
0.371.713082.485000e-06
0.3713991.7123462.282200e-06
0.3730131.7115152.048364e-06
0.3746331.7106981.813511e-06
0.3762611.7098941.577638e-06
0.3778951.7091021.340741e-06
0.3795371.7083221.102814e-06
0.381.7081051.035700e-06
0.3811861.7075559.727006e-07
0.3828421.7067998.847161e-07
0.3845051.7060547.963494e-07
0.3861751.7053217.075988e-07
0.3878531.7045986.184627e-07
0.3895381.7038865.289393e-07
0.391.7036935.043800e-07
0.391231.7031844.771205e-07
0.392931.7024924.394541e-07
0.3946371.701814.016240e-07
0.3963511.7011383.636296e-07
0.3980731.7004753.254702e-07
0.3998021.6998212.871450e-07
0.41.6997472.827600e-07
0.4015391.6991762.704313e-07
0.4032831.6985412.564571e-07
0.4050351.6979132.424221e-07
0.4067951.6972942.283262e-07
0.4085621.6966842.141691e-07
0.4103371.6960821.999505e-07
0.412121.6954871.856700e-07
0.413911.6949011.713276e-07
0.4157081.6943221.569228e-07
0.4175141.693751.424555e-07
0.4193281.6931861.279253e-07
0.421.692981.225400e-07
0.4211491.692631.203859e-07
0.4229791.692081.169572e-07
0.4248171.6915371.135136e-07
0.4266621.6910011.100551e-07
0.4285161.6904721.065815e-07
0.4303771.689951.030928e-07
0.4322471.6894339.958896e-08
0.4341251.6889249.606991e-08
0.436011.688429.253556e-08
0.4379051.6879238.898587e-08
0.4398071.6874328.542075e-08
0.441.6873828.505900e-08
0.4417181.6869468.378463e-08
0.4436371.6864678.236088e-08
0.4455641.6859938.093095e-08
0.4474991.6855257.949481e-08
0.4494431.6850637.805243e-08
0.4513961.6846067.660378e-08
0.4533571.6841547.514884e-08
0.4553261.6837087.368758e-08
0.4573041.6832677.221997e-08
0.4592911.6828317.074598e-08
0.461.6826777.022000e-08
0.4612861.68246.916738e-08
0.463291.6819746.752756e-08
0.4653031.6815536.588061e-08
0.4673241.6811366.422651e-08
0.4693541.6807256.256523e-08
0.4713931.6803186.089673e-08
0.4734411.6799165.922098e-08
0.4754981.6795185.753795e-08
0.4775641.6791245.584761e-08
0.4796381.6787365.414992e-08
0.481.6786685.385400e-08
0.4817221.6783515.335297e-08
0.4838151.6779715.274410e-08
0.4859171.6775945.213258e-08
0.4880271.6772225.151840e-08
0.4901481.6768545.090156e-08
0.4922771.6764915.028203e-08
0.4944151.6761314.965982e-08
0.4965631.6757744.903490e-08
0.4987211.6754224.840727e-08
0.51.6752164.803500e-08
0.5008871.6750744.772825e-08
0.5030631.6747294.697580e-08
0.5052481.6743884.622008e-08
0.5074431.6740514.546108e-08
0.5096481.6737174.469878e-08
0.5118621.6733864.393317e-08
0.5140861.673064.316423e-08
0.5163191.6727364.239195e-08
0.5185621.6724164.161632e-08
0.5208151.6720994.083732e-08
0.5230771.6717864.005493e-08
0.5253491.6714763.926914e-08
0.5276321.6711693.847994e-08
0.5299241.6708653.768732e-08
0.5322261.6705643.689125e-08
0.5345381.6702663.609172e-08
0.536861.6699723.528871e-08
0.5391931.669683.448222e-08
0.5415351.6693913.367223e-08
0.5438871.6691063.285872e-08
0.546251.6688233.204167e-08
0.5486231.6685433.122107e-08
0.551.6683823.074500e-08
0.5510071.6682653.089813e-08
0.55341.6679913.126226e-08
0.5558041.6677193.162797e-08
0.5582191.667453.199527e-08
0.5606441.6671833.236417e-08
0.563081.6669193.273466e-08
0.5655261.6666583.310677e-08
0.5679821.6663993.348050e-08
0.570451.6661433.385585e-08
0.5729281.6658893.423282e-08
0.5754171.6656383.461144e-08
0.5779171.6653893.499170e-08
0.5804271.6651423.537362e-08
0.5829491.6648983.575719e-08
0.5854811.6646563.614243e-08
0.5880251.6644173.652934e-08
0.5905791.6641793.691793e-08
0.5931451.6639443.730821e-08
0.5957221.6637113.770019e-08
0.598311.6634813.809387e-08
0.61.6633323.835100e-08
0.6009091.6632523.850393e-08
0.6035191.6630263.894317e-08
0.6061411.6628023.938432e-08
0.6087741.6625793.982739e-08
0.6114191.6623594.027238e-08
0.6140751.6621414.071930e-08
0.6167431.6619254.116816e-08
0.6194221.6617114.161898e-08
0.6221131.6614984.207175e-08
0.6248161.6612884.252649e-08
0.627531.661084.298321e-08
0.6302561.6608734.344191e-08
0.6329941.6606684.390260e-08
0.6357441.6604664.436530e-08
0.6385061.6602644.483000e-08
0.641281.6600654.529672e-08
0.6440661.6598684.576547e-08
0.6468641.6596724.623626e-08
0.6496741.6594784.670909e-08
0.651.6594564.676400e-08
0.6524961.6592864.666311e-08
0.6553311.6590954.654854e-08
0.6581781.6589064.643347e-08
0.6610371.6587194.631789e-08
0.6639081.6585334.620182e-08
0.6667931.6583494.608524e-08
0.6696891.6581664.596816e-08
0.6725991.6579854.585056e-08
0.6755211.6578064.573246e-08
0.6784551.6576284.561384e-08
0.6814031.6574514.549471e-08
0.6843631.6572764.537506e-08
0.6873361.6571034.525489e-08
0.6903221.6569314.513420e-08
0.6933211.656764.501298e-08
0.6963331.6565914.489124e-08
0.6993581.6564234.476897e-08
0.71.6563884.474300e-08
0.7023961.6562574.504995e-08
0.7054471.6560914.544089e-08
0.7085121.6559284.583353e-08
0.711591.6557654.622787e-08
0.7146811.6556044.662393e-08
0.7177861.6554444.702171e-08
0.7209041.6552864.742122e-08
0.7240361.6551294.782246e-08
0.7271811.6549734.822545e-08
0.730341.6548184.863019e-08
0.7335131.6546644.903668e-08
0.73671.6545124.944494e-08
0.73991.6543614.985498e-08
0.7431141.6542115.026679e-08
0.7463421.6540625.068040e-08
0.7495851.6539145.109580e-08
0.7528411.6537685.151301e-08
0.7561121.6536225.193203e-08
0.7593961.6534785.235286e-08
0.7626951.6533355.277553e-08
0.7660091.6531925.320004e-08
0.7693361.6530515.362638e-08
0.7726791.6529115.405458e-08
0.7760351.6527725.448464e-08
0.7794071.6526345.491657e-08
0.7827931.6524975.535038e-08
0.7861931.6523615.578606e-08
0.7896091.6522265.622365e-08
0.7930391.6520925.666313e-08
0.7964841.6519585.710452e-08
0.7999441.6518265.754783e-08
0.81.6518245.755500e-08
0.8034191.6516955.607733e-08
0.8069091.6515645.456895e-08
0.8104151.6514355.305402e-08
0.8139351.6513065.153251e-08
0.8174711.6511795.000439e-08
0.8210231.6510524.846963e-08
0.8245891.6509264.692820e-08
0.8281721.6508014.538008e-08
0.8317691.6506764.382523e-08
0.8353831.6505534.226363e-08
0.8390121.650434.069524e-08
0.8426571.6503083.912004e-08
0.8463171.6501873.753799e-08
0.8499941.6500673.594908e-08
0.8536871.6499473.435326e-08
0.8573951.6498283.275051e-08
0.861121.649713.114079e-08
0.8648611.6495932.952408e-08
0.8686181.6494762.790035e-08
0.8723911.649362.626957e-08
0.8761811.6492452.463170e-08
0.8799881.6491312.298671e-08
0.8838111.6490172.133458e-08
0.887651.6489041.967527e-08
0.8915061.6487911.800876e-08
0.8953791.6486791.633500e-08
0.8992691.6485681.465397e-08
0.91.6485471.433800e-08
0.9031751.6484571.514937e-08
0.9070991.6483471.615189e-08
0.911041.6482381.715877e-08
0.9149981.6481291.817002e-08
0.9189721.6480211.918566e-08
0.9229651.6479132.020572e-08
0.9269741.6478062.123020e-08
0.9310011.64772.225914e-08
0.9350461.6475942.329255e-08
0.9391081.6474882.433044e-08
0.9431881.6473842.537285e-08
0.9472851.6472792.641978e-08
0.95141.6471752.747126e-08
0.9555331.6470722.852731e-08
0.9596841.6469692.958795e-08
0.9638531.6468673.065320e-08
0.9680411.6467653.172307e-08
0.9722461.6466643.279759e-08
0.976471.6465633.387678e-08
0.9807121.6464623.496065e-08
0.9849721.6463623.604924e-08
0.9892511.6462623.714255e-08
0.9935491.6461633.824062e-08
0.9978651.6460643.934345e-08
11.6460163.988900e-08
1.00221.6459663.976583e-08
1.006551.6458683.952206e-08
1.010931.645773.927724e-08
1.015321.6456733.903134e-08
1.019731.6455763.878438e-08
1.024161.645483.853635e-08
1.028611.6453833.828724e-08
1.033081.6452883.803705e-08
1.037561.6451923.778577e-08
1.042071.6450973.753340e-08
1.04661.6450023.727993e-08
1.051151.6449083.702537e-08
1.055711.6448143.676969e-08
1.06031.644723.651291e-08
1.06491.6446263.625501e-08
1.069531.6445333.599599e-08
1.074181.644443.573584e-08
1.078841.6443473.547456e-08
1.083531.6442543.521215e-08
1.088241.6441623.494860e-08
1.092961.644073.468391e-08
1.097711.6439783.441806e-08
1.102481.6438873.415106e-08
1.107271.6437953.388290e-08
1.112081.6437043.361357e-08
1.116911.6436133.334308e-08
1.121761.6435223.307141e-08
1.126641.6434323.279856e-08
1.131531.6433413.252452e-08
1.136451.6432513.224929e-08
1.141381.6431613.197287e-08
1.146341.6430713.169525e-08
1.151321.6429813.141642e-08
1.156321.6428923.113638e-08
1.161351.6428023.085512e-08
1.166391.6427133.057264e-08
1.171461.6426243.028894e-08
1.176551.6425353.000400e-08
1.181661.6424462.971782e-08
1.186791.6423572.943040e-08
1.191951.6422682.914173e-08
1.197131.6421792.885181e-08
1.21.642132.869100e-08
1.202331.642092.926810e-08
1.207551.6420023.056264e-08
1.21281.6419133.186281e-08
1.218071.6418253.316862e-08
1.223361.6417363.448011e-08
1.228671.6416483.579730e-08
1.234011.641563.712020e-08
1.239371.6414713.844886e-08
1.244751.6413833.978328e-08
1.250161.6412954.112351e-08
1.255591.6412064.246955e-08
1.261051.6411184.382145e-08
1.266531.641034.517921e-08
1.272031.6409414.654288e-08
1.277551.6408534.791247e-08
1.28311.6407654.928800e-08
1.288681.6406765.066952e-08
1.294281.6405885.205703e-08
1.29991.6404995.345058e-08
1.305551.640415.485018e-08
1.311221.6403225.625585e-08
1.316911.6402335.766764e-08
1.322641.6401445.908555e-08
1.328381.6400556.050963e-08
1.334151.6399666.193990e-08
1.339951.6398776.337637e-08
1.345771.6397886.481909e-08
1.351621.6396986.626807e-08
1.357491.6396096.772335e-08
1.363381.6395196.918496e-08
1.369311.639437.065291e-08
1.375261.639347.212724e-08
1.381231.639257.360797e-08
1.387231.6391597.509513e-08
1.393261.6390697.658876e-08
1.399311.6389787.808888e-08
1.41.6389687.826000e-08
1.405391.6388878.029280e-08
1.411491.6387968.259604e-08
1.417631.6387058.490929e-08
1.423781.6386148.723258e-08
1.429971.6385228.956597e-08
1.436181.6384319.190949e-08
1.442421.6383389.426319e-08
1.448691.6382469.662712e-08
1.454981.6381549.900132e-08
1.46131.6380611.013858e-07
1.467651.6379681.037807e-07
1.474031.6378751.061860e-07
1.480431.6377811.086017e-07
1.486861.6376871.110279e-07
1.493321.6375931.134647e-07
1.499811.6374991.159120e-07
1.506321.6374041.183700e-07
1.512871.6373091.208387e-07
1.519441.6372131.233180e-07
1.526041.6371181.258082e-07
1.532671.6370221.283092e-07
1.539331.6369251.308210e-07
1.546011.6368291.333437e-07
1.552731.6367321.358774e-07
1.559481.6366341.384221e-07
1.566251.6365361.409779e-07
1.573051.6364381.435448e-07
1.579891.636341.461228e-07
1.586751.6362411.487120e-07
1.593641.6361411.513125e-07
1.61.636051.537100e-07
1.600571.6360411.544286e-07
1.607521.6359411.632273e-07
1.61451.6358411.720641e-07
1.621521.635741.809394e-07
1.628561.6356381.898532e-07
1.635641.6355361.988057e-07
1.642741.6354342.077971e-07
1.649881.6353312.168276e-07
1.657051.6352272.258973e-07
1.664251.6351242.350064e-07
1.671481.6350192.441551e-07
1.678741.6349152.533435e-07
1.686031.6348092.625719e-07
1.693351.6347032.718403e-07
1.700711.6345972.811490e-07
1.70811.634492.904981e-07
1.715521.6343832.998879e-07
1.722971.6342753.093184e-07
1.730461.6341663.187899e-07
1.737971.6340573.283026e-07
1.745521.6339473.378566e-07
1.753111.6338373.474520e-07
1.760721.6337263.570892e-07
1.768371.6336153.667682e-07
1.776051.6335033.764893e-07
1.783771.633393.862526e-07
1.791521.6332773.960584e-07
1.79931.6331634.059067e-07
1.81.6331534.067900e-07
1.807121.6330484.201764e-07
1.814971.6329334.349394e-07
1.822851.6328174.497665e-07
1.830771.6327014.646580e-07
1.838731.6325844.796142e-07
1.846711.6324664.946353e-07
1.854741.6323475.097217e-07
1.862791.6322285.248737e-07
1.870891.6321085.400915e-07
1.879011.6319875.553754e-07
1.887181.6318665.707257e-07
1.895371.6317435.861426e-07
1.903611.631626.016266e-07
1.911881.6314976.171778e-07
1.920181.6313726.327966e-07
1.928531.6312476.484832e-07
1.93691.6311216.642380e-07
1.945321.6309946.800612e-07
1.953771.6308666.959531e-07
1.962261.6307387.119141e-07
1.970781.6306087.279444e-07
1.979341.6304787.440444e-07
1.987941.6303477.602143e-07
1.996581.6302157.764545e-07
21.6301637.828900e-07
2.005251.6300828.159029e-07
2.013961.6299498.706668e-07
2.022711.6298149.256686e-07
2.03151.6296799.809094e-07
2.040321.6295421.036390e-06
2.049191.6294051.092112e-06
2.058091.6292671.148076e-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
—