Optical constants

Refractive index of J-LASFH21 (HIKARI)

J-LASFH21: n,k 0.3889–2.058 µm

Data
formula 3 + tabulated k
Range
0.3889–2.058 µm
Temperature
296 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.3889–2.058 µm
Refractive index n
1.95374
Extinction coefficient k
3.97490e-08
Permittivity ε1
3.81712
Permittivity ε2
1.55319e-07
Absorption coefficient α
0.00850069 cm⁻¹
Penetration depth δ = λ/(2πk)
2.35275e+09 nm
Abbe number Vd
32.335
Chromatic dispersion dn/dλ
-0.149074 µm⁻¹
Group index ng
2.04134
Group velocity dispersion
295.401 fs²/mm
Dispersion parameter D
-1611.57 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-LASFH21 (HIKARI): J-LASFH21
hikari_j_lasfh21 = ls.fetch_refractiveindex("specs", "HIKARI-optical", "J-LASFH21", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_j_lasfh21.range_nm)  # (388.865, 2058.09) nm
eps = hikari_j_lasfh21.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=3.67012303−0.0139442893⁢λ2.0−0.000136361252⁢λ4.0+0.0484434485⁢λ−2.0+0.000950687214⁢λ−4.0+0.000181807808⁢λ−6.0−1.62618274×10-5⁢λ−8.0+1.33939862×10-6⁢λ−10.0

Valid from 0.388865 to 2.05809 µm.

Coefficients as stored
CiValue
C13.67012303
C2-0.0139442893
C32.0
C4-0.000136361252
C54.0
C60.0484434485
C7-2.0
C80.000950687214
C9-4.0
C100.000181807808
C11-6.0
C12-1.62618274e-05
C13-8.0
C141.33939862e-06
C15-10.0

Comments and conditions

Conditions

temperature
296 K

Properties

thermal dispersion
type: formula A, coefficients: 6.76193e-07 6.83583e-09 2.24584e-12 9.81173e-07 1.29551e-09 0.249631
nd
1.953750
Vd
32.334656
density
value: 5050
thermal expansion
value: 7e-06, temperature range: 243 343
dPgF
0.0004
resistance
phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 296.0 K): dn/dT = 2.56e-06 K⁻¹ at 633 nm, dn/dT = 8.86e-07 K⁻¹ at 1310 nm, dn/dT = 7.61e-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 419 wavelengths, the same grid as the API and the library
J-LASFH21 (HIKARI), J-LASFH21: n and k versus wavelength
λ (µm)nk
0.3888652.0170197.911496e-07
0.392.0162667.315700e-07
0.3904922.0159427.210204e-07
0.3921272.0148796.860065e-07
0.3937682.0138316.508460e-07
0.3954152.0127976.155383e-07
0.397072.0117765.800829e-07
0.3987322.0107685.444791e-07
0.42.0100115.173100e-07
0.4004012.0097735.126758e-07
0.4020762.0087924.932928e-07
0.4037592.0078234.738286e-07
0.4054492.0068664.542830e-07
0.4071452.0059214.346556e-07
0.4088492.0049884.149460e-07
0.410562.0040673.951540e-07
0.4122782.0031583.752791e-07
0.4140042.002263.553211e-07
0.4157362.0013733.352795e-07
0.4174762.0004963.151541e-07
0.4192231.9996312.949444e-07
0.421.9992512.859600e-07
0.4209781.9987762.816639e-07
0.4227391.9979312.739227e-07
0.4245091.9970972.661491e-07
0.4262851.9962722.583430e-07
0.4280691.9954582.505042e-07
0.4298611.9946532.426327e-07
0.431661.9938572.347281e-07
0.4334661.9930712.267905e-07
0.435281.9922942.188197e-07
0.4371021.9915262.108156e-07
0.4389311.9907682.027779e-07
0.441.9903291.980800e-07
0.4407681.9900171.962125e-07
0.4426121.9892761.917255e-07
0.4444651.9885431.872198e-07
0.4463251.9878181.826952e-07
0.4481931.9871021.781517e-07
0.4500681.9863941.735892e-07
0.4519521.9856941.690076e-07
0.4538431.9850011.644068e-07
0.4557421.9843171.597868e-07
0.457651.983641.551474e-07
0.4595651.982971.504886e-07
0.461.982821.494300e-07
0.4614881.9823081.466756e-07
0.4634191.9816531.431008e-07
0.4653591.9810061.395110e-07
0.4673061.9803661.359062e-07
0.4692621.9797321.322863e-07
0.4712261.9791061.286512e-07
0.4731981.9784861.250010e-07
0.4751781.9778731.213355e-07
0.4771671.9772661.176546e-07
0.4791641.9766661.139583e-07
0.481.9764181.124100e-07
0.4811691.9760731.105384e-07
0.4831821.9754861.073139e-07
0.4852051.9749051.040760e-07
0.4872351.974331.008245e-07
0.4892741.9737619.755935e-08
0.4913221.9731999.428056e-08
0.4933781.9726429.098806e-08
0.4954431.9720918.768177e-08
0.4975161.9715468.436165e-08
0.4995981.9710068.102764e-08
0.51.9709038.038400e-08
0.5016891.9704727.915466e-08
0.5037881.9699447.762637e-08
0.5058971.9694217.609169e-08
0.5080141.9689037.455058e-08
0.510141.9683917.300302e-08
0.5122751.9678837.144899e-08
0.5144191.9673816.988845e-08
0.5165711.9668856.832138e-08
0.5187331.9663936.674775e-08
0.5209041.9659066.516754e-08
0.5230841.9654246.358071e-08
0.5252731.9649476.198725e-08
0.5274711.9644756.038711e-08
0.5296791.9640075.878028e-08
0.5318951.9635445.716673e-08
0.5341211.9630865.554642e-08
0.5363571.9626325.391933e-08
0.5386011.9621835.228543e-08
0.5408551.9617385.064469e-08
0.5431191.9612974.899709e-08
0.5453921.9608614.734259e-08
0.5476741.9604294.568117e-08
0.5499661.9600014.401280e-08
0.551.9599954.398800e-08
0.5522681.9595784.373236e-08
0.5545791.9591584.347180e-08
0.55691.9587434.321014e-08
0.559231.9583314.294739e-08
0.561571.9579244.268354e-08
0.5639211.957524.241859e-08
0.5662811.9571214.215253e-08
0.568651.9567254.188535e-08
0.571031.9563334.161706e-08
0.573421.9559444.134764e-08
0.575821.9555594.107709e-08
0.5782291.9551784.080542e-08
0.5806491.9548014.053260e-08
0.5830791.9544274.025865e-08
0.5855191.9540563.998355e-08
0.587971.9536893.970729e-08
0.590431.9533263.942988e-08
0.5929011.9529653.915131e-08
0.5953821.9526093.887158e-08
0.5978741.9522553.859067e-08
0.61.9519573.835100e-08
0.6003761.9519053.837505e-08
0.6028891.9515583.853565e-08
0.6054121.9512143.869692e-08
0.6079451.9508733.885887e-08
0.610491.9505353.902149e-08
0.6130441.9502013.918480e-08
0.615611.9498693.934879e-08
0.6181861.949543.951346e-08
0.6207731.9492153.967883e-08
0.6233711.9488923.984489e-08
0.625981.9485724.001164e-08
0.62861.9482554.017909e-08
0.631231.9479414.034724e-08
0.6338721.947634.051609e-08
0.6365251.9473214.068566e-08
0.6391881.9470154.085593e-08
0.6418631.9467124.102691e-08
0.644551.9464124.119861e-08
0.6472471.9461144.137103e-08
0.6499561.9458194.154416e-08
0.651.9458144.154700e-08
0.6526761.9455264.171803e-08
0.6554071.9452364.189262e-08
0.658151.9449484.206794e-08
0.6609041.9446634.224400e-08
0.663671.9443814.242079e-08
0.6664471.94414.259832e-08
0.6692361.9438224.277659e-08
0.6720371.9435474.295562e-08
0.674851.9432744.313539e-08
0.6776741.9430034.331591e-08
0.680511.9427354.349719e-08
0.6833581.9424684.367922e-08
0.6862171.9422044.386202e-08
0.6890891.9419434.404559e-08
0.6919731.9416834.422992e-08
0.6948691.9414254.441502e-08
0.6977771.941174.460090e-08
0.71.9409774.474300e-08
0.7006971.9409174.487710e-08
0.7036291.9406664.544126e-08
0.7065741.9404174.600778e-08
0.7095311.940174.657667e-08
0.71251.9399254.714794e-08
0.7154821.9396824.772160e-08
0.7184761.9394414.829766e-08
0.7214831.9392024.887613e-08
0.7245021.9389644.945703e-08
0.7275341.9387295.004035e-08
0.7305791.9384965.062612e-08
0.7336371.9382645.121433e-08
0.7367071.9380355.180501e-08
0.739791.9378075.239816e-08
0.7428861.9375815.299380e-08
0.7459951.9373565.359192e-08
0.7491171.9371345.419255e-08
0.7522521.9369135.479569e-08
0.75541.9366945.540136e-08
0.7585611.9364775.600956e-08
0.7617361.9362615.662031e-08
0.7649231.9360475.723361e-08
0.7681251.9358345.784948e-08
0.7713391.9356235.846792e-08
0.7745671.9354145.908896e-08
0.7778091.9352075.971259e-08
0.7810641.9356.033883e-08
0.7843321.9347966.096770e-08
0.7876151.9345936.159919e-08
0.7909111.9343916.223333e-08
0.7942211.9341916.287013e-08
0.7975441.9339936.350958e-08
0.81.9338476.398200e-08
0.8008821.9337966.360741e-08
0.8042341.93366.218417e-08
0.8075991.9334066.075497e-08
0.8109791.9332135.931980e-08
0.8143731.9330215.787862e-08
0.8177811.9328315.643141e-08
0.8212041.9326425.497814e-08
0.824641.9324555.351879e-08
0.8280911.9322695.205333e-08
0.8315571.9320845.058174e-08
0.8350371.93194.910399e-08
0.8385311.9317184.762006e-08
0.8420411.9315374.612992e-08
0.8455641.9313574.463354e-08
0.8491031.9311794.313089e-08
0.8526561.9310014.162196e-08
0.8562251.9308254.010672e-08
0.8598081.930653.858513e-08
0.8634061.9304763.705718e-08
0.867021.9303043.552283e-08
0.8706481.9301323.398206e-08
0.8742921.9299623.243485e-08
0.877951.9297923.088115e-08
0.8816251.9296242.932096e-08
0.8853141.9294572.775424e-08
0.8890191.9292912.618095e-08
0.892741.9291262.460109e-08
0.8964761.9289622.301461e-08
0.91.9288092.151800e-08
0.9002271.9287992.159613e-08
0.9039951.9286372.289144e-08
0.9077781.9284762.419216e-08
0.9115771.9283162.549833e-08
0.9153921.9281572.680996e-08
0.9192231.9279992.812708e-08
0.9230691.9278422.944971e-08
0.9269321.9276853.077788e-08
0.9308121.927533.211161e-08
0.9347071.9273763.345092e-08
0.9386191.9272223.479583e-08
0.9425471.9270693.614637e-08
0.9464911.9269183.750257e-08
0.9504521.9267673.886444e-08
0.954431.9266174.023201e-08
0.9584241.9264684.160530e-08
0.9624351.9263194.298434e-08
0.9664631.9261714.436915e-08
0.9705071.9260254.575975e-08
0.9745691.9258794.715618e-08
0.9786471.9257334.855845e-08
0.9827431.9255894.996659e-08
0.9868551.9254455.138062e-08
0.9909851.9253025.280056e-08
0.9951321.925165.422645e-08
0.9992971.9250185.565831e-08
11.9249945.590000e-08
1.003481.9248775.542669e-08
1.007681.9247375.485538e-08
1.01191.9245985.428167e-08
1.016131.9244595.370555e-08
1.020381.9243215.312703e-08
1.024651.9241835.254609e-08
1.028941.9240465.196272e-08
1.033251.923915.137690e-08
1.037571.9237745.078863e-08
1.041911.9236395.019790e-08
1.046271.9235054.960470e-08
1.050651.9233714.900902e-08
1.055051.9232374.841084e-08
1.059461.9231054.781016e-08
1.06391.9229724.720697e-08
1.068351.9228414.660125e-08
1.072821.9227094.599300e-08
1.077311.9225794.538220e-08
1.081821.9224494.476884e-08
1.086351.9223194.415292e-08
1.090891.922194.353442e-08
1.095461.9220614.291334e-08
1.100041.9219334.228965e-08
1.104651.9218054.166335e-08
1.109271.9216784.103444e-08
1.113911.9215514.040289e-08
1.118571.9214253.976869e-08
1.123251.9212993.913185e-08
1.127961.9211733.849234e-08
1.132681.9210483.785015e-08
1.137421.9209233.720527e-08
1.142181.9207993.655770e-08
1.146961.9206753.590741e-08
1.151761.9205513.525441e-08
1.156581.9204283.459867e-08
1.161421.9203053.394019e-08
1.166281.9201823.327895e-08
1.171161.920063.261494e-08
1.176061.9199383.194816e-08
1.180981.9198163.127858e-08
1.185921.9196953.060620e-08
1.190891.9195742.993101e-08
1.195871.9194532.925300e-08
1.21.9193532.869100e-08
1.200871.9193322.876073e-08
1.20591.9192122.916182e-08
1.210951.9190922.956459e-08
1.216011.9189722.996904e-08
1.22111.9188533.037519e-08
1.226211.9187333.078304e-08
1.231341.9186143.119259e-08
1.23651.9184953.160386e-08
1.241671.9183763.201685e-08
1.246871.9182583.243156e-08
1.252091.918143.284802e-08
1.257331.9180213.326621e-08
1.262591.9179033.368616e-08
1.267871.9177853.410786e-08
1.273181.9176683.453133e-08
1.278511.917553.495657e-08
1.283861.9174323.538359e-08
1.289231.9173153.581239e-08
1.294621.9171983.624300e-08
1.300041.917083.667540e-08
1.305481.9169633.710961e-08
1.310951.9168463.754564e-08
1.316431.9167293.798350e-08
1.321941.9166123.842318e-08
1.327471.9164963.886471e-08
1.333031.9163793.930809e-08
1.338611.9162623.975332e-08
1.344211.9161454.020041e-08
1.349841.9160294.064938e-08
1.355481.9159124.110022e-08
1.361161.9157954.155295e-08
1.366851.9156784.200757e-08
1.372571.9155624.246410e-08
1.378321.9154454.292254e-08
1.384091.9153284.338290e-08
1.389881.9152114.384518e-08
1.395691.9150944.430940e-08
1.41.9150084.465300e-08
1.401541.9149774.519398e-08
1.40741.914864.726025e-08
1.413291.9147434.933516e-08
1.419211.9146265.141876e-08
1.425141.9145085.351107e-08
1.431111.9143915.561214e-08
1.43711.9142735.772201e-08
1.443111.9141565.984070e-08
1.449151.9140386.196826e-08
1.455221.913926.410473e-08
1.461311.9138026.625013e-08
1.467421.9136836.840452e-08
1.473561.9135657.056792e-08
1.479731.9134467.274037e-08
1.485921.9133277.492192e-08
1.492141.9132087.711259e-08
1.498381.9130897.931243e-08
1.504661.912978.152148e-08
1.510951.912858.373978e-08
1.517281.912738.596735e-08
1.523631.912618.820425e-08
1.531.9124899.045051e-08
1.53641.9123699.270617e-08
1.542831.9122489.497127e-08
1.549291.9121269.724585e-08
1.555771.9120059.952995e-08
1.562291.9118831.018236e-07
1.568821.9117611.041269e-07
1.575391.9116381.064398e-07
1.581981.9115151.087623e-07
1.58861.9113921.110946e-07
1.595251.9112691.134367e-07
1.61.911181.151100e-07
1.601931.9111451.163667e-07
1.608631.911021.207407e-07
1.615361.9108961.251330e-07
1.622121.9107711.295436e-07
1.628911.9106451.339728e-07
1.635731.910521.384204e-07
1.642571.9103931.428867e-07
1.649451.9102671.473717e-07
1.656351.910141.518754e-07
1.663281.9100121.563980e-07
1.670241.9098841.609395e-07
1.677231.9097551.655001e-07
1.684251.9096261.700797e-07
1.69131.9094971.746784e-07
1.698381.9093671.792965e-07
1.705491.9092371.839338e-07
1.712621.9091061.885906e-07
1.719791.9089741.932668e-07
1.726991.9088421.979626e-07
1.734211.9087092.026781e-07
1.741471.9085762.074133e-07
1.748761.9084422.121683e-07
1.756081.9083082.169432e-07
1.763431.9081732.217381e-07
1.770811.9080382.265530e-07
1.778221.9079012.313881e-07
1.785661.9077652.362435e-07
1.793131.9076272.411192e-07
1.81.9075012.456000e-07
1.800641.9074892.464656e-07
1.808171.907352.567146e-07
1.815741.9072112.670066e-07
1.823341.9070712.773417e-07
1.830971.906932.877199e-07
1.838631.9067892.981417e-07
1.846331.9066463.086070e-07
1.854051.9065033.191161e-07
1.861811.906363.296692e-07
1.86961.9062153.402665e-07
1.877431.906073.509082e-07
1.885281.9059243.615943e-07
1.893171.9057773.723252e-07
1.90111.905633.831010e-07
1.909051.9054813.939219e-07
1.917041.9053324.047880e-07
1.925061.9051824.156997e-07
1.933121.9050314.266570e-07
1.941211.904884.376601e-07
1.949331.9047274.487094e-07
1.957491.9045734.598048e-07
1.965681.9044194.709467e-07
1.973911.9042644.821352e-07
1.982171.9041074.933705e-07
1.990471.903955.046529e-07
1.99881.9037925.159825e-07
21.9037695.176200e-07
2.007161.9036335.418874e-07
2.015561.9034735.703535e-07
2.0241.9033125.989388e-07
2.032471.903156.276437e-07
2.040971.9029876.564687e-07
2.049511.9028226.854144e-07
2.058091.9026577.144812e-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
—