Optical constants

Refractive index of J-LF7 (HIKARI)

J-LF7: 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
1.57501
Extinction coefficient k
2.81403e-08
Permittivity ε1
2.48065
Permittivity ε2
8.86423e-08
Absorption coefficient α
0.00601806 cm⁻¹
Penetration depth δ = λ/(2πk)
3.32333e+09 nm
Abbe number Vd
41.512
Chromatic dispersion dn/dλ
-0.0704942 µm⁻¹
Group index ng
1.61643
Group velocity dispersion
133.681 fs²/mm
Dispersion parameter D
-729.303 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-LF7 (HIKARI): J-LF7
hikari_j_lf7 = ls.fetch_refractiveindex("specs", "HIKARI-optical", "J-LF7", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_j_lf7.range_nm)  # (365.015, 2058.09) nm
eps = hikari_j_lf7.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=2.42574282−0.00890909885⁢λ2.0−0.000108092631⁢λ4.0+0.0190630501⁢λ−2.0+0.000117245652⁢λ−4.0+9.74566345×10-5⁢λ−6.0−9.93663901×10-6⁢λ−8.0+6.41905453×10-7⁢λ−10.0

Valid from 0.365015 to 2.05809 µm.

Coefficients as stored
CiValue
C12.42574282
C2-0.00890909885
C32.0
C4-0.000108092631
C54.0
C60.0190630501
C7-2.0
C80.000117245652
C9-4.0
C109.74566345e-05
C11-6.0
C12-9.93663901e-06
C13-8.0
C146.41905453e-07
C15-10.0

Comments and conditions

Conditions

temperature
296 K

Properties

thermal dispersion
type: formula A, coefficients: -6.2524e-07 1.1487e-08 -1.0892e-12 7.1836e-07 8.2339e-10 0.24457
nd
1.575010
Vd
41.512435
density
value: 2600
thermal expansion
value: 8e-06, temperature range: 243 343
dPgF
0.0017
resistance
phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 296.0 K): dn/dT = 6.94e-07 K⁻¹ at 633 nm, dn/dT = -8.75e-08 K⁻¹ at 1310 nm, dn/dT = -1.45e-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-LF7 (HIKARI), J-LF7: n and k versus wavelength
λ (µm)nk
0.3650151.6122032.129446e-06
0.3666011.6115851.870056e-06
0.3681931.6109771.609538e-06
0.3697931.6103781.347889e-06
0.371.6103011.314000e-06
0.3713991.6097871.214104e-06
0.3730131.6092051.098921e-06
0.3746331.6086329.832363e-07
0.3762611.6080678.670494e-07
0.3778951.607517.503579e-07
0.3795371.6069616.331594e-07
0.381.6068076.001000e-07
0.3811861.6064195.632468e-07
0.3828421.6058855.117779e-07
0.3845051.6053584.600854e-07
0.3861751.6048394.081683e-07
0.3878531.6043263.560258e-07
0.3895381.6038213.036567e-07
0.391.6036842.892900e-07
0.391231.6033222.729665e-07
0.392931.602832.504112e-07
0.3946371.6023442.277579e-07
0.3963511.6018652.050062e-07
0.3980731.6013921.821556e-07
0.3998021.6009251.592058e-07
0.41.6008721.565800e-07
0.4015391.6004641.505157e-07
0.4032831.6000091.436419e-07
0.4050351.599561.367384e-07
0.4067951.5991161.298048e-07
0.4085621.5986781.228411e-07
0.4103371.5982451.158471e-07
0.412121.5978181.088228e-07
0.413911.5973961.017679e-07
0.4157081.5969799.468245e-08
0.4175141.5965688.756617e-08
0.4193281.5961618.041897e-08
0.421.5960127.777000e-08
0.4211491.5957597.675081e-08
0.4229791.5953627.512853e-08
0.4248171.594977.349920e-08
0.4266621.5945827.186280e-08
0.4285161.5941997.021928e-08
0.4303771.593826.856863e-08
0.4322471.5934466.691080e-08
0.4341251.5930766.524577e-08
0.436011.5927116.357351e-08
0.4379051.592356.189398e-08
0.4398071.5919936.020716e-08
0.441.5919576.003600e-08
0.4417181.5916395.931238e-08
0.4436371.591295.850393e-08
0.4455641.5909455.769198e-08
0.4474991.5906045.687650e-08
0.4494431.5902675.605747e-08
0.4513961.5899335.523489e-08
0.4533571.5896035.440873e-08
0.4553261.5892775.357899e-08
0.4573041.5889545.274564e-08
0.4592911.5886355.190867e-08
0.461.5885235.161000e-08
0.4612861.588325.100799e-08
0.463291.5880085.007015e-08
0.4653031.5876994.912823e-08
0.4673241.5873944.818222e-08
0.4693541.5870924.723210e-08
0.4713931.5867934.627786e-08
0.4734411.5864974.531947e-08
0.4754981.5862054.435691e-08
0.4775641.5859154.339018e-08
0.4796381.5856294.241924e-08
0.481.585584.225000e-08
0.4817221.5853464.170945e-08
0.4838151.5850664.105255e-08
0.4859171.5847884.039279e-08
0.4880271.5845143.973017e-08
0.4901481.5842423.906467e-08
0.4922771.5839743.839628e-08
0.4944151.5837083.772498e-08
0.4965631.5834443.705077e-08
0.4987211.5831843.637363e-08
0.51.5830313.597200e-08
0.5008871.5829263.580111e-08
0.5030631.5826713.538193e-08
0.5052481.5824183.496093e-08
0.5074431.5821683.453811e-08
0.5096481.5819213.411344e-08
0.5118621.5816763.368693e-08
0.5140861.5814333.325857e-08
0.5163191.5811933.282834e-08
0.5185621.5809553.239625e-08
0.5208151.580723.196228e-08
0.5230771.5804873.152642e-08
0.5253491.5802563.108867e-08
0.5276321.5800283.064902e-08
0.5299241.5798023.020746e-08
0.5322261.5795782.976398e-08
0.5345381.5793562.931858e-08
0.536861.5791362.887124e-08
0.5391931.5789192.842195e-08
0.5415351.5787032.797072e-08
0.5438871.578492.751752e-08
0.546251.5782792.706235e-08
0.5486231.578072.660521e-08
0.551.577952.634000e-08
0.5510071.5778622.638820e-08
0.55341.5776572.650281e-08
0.5558041.5774542.661792e-08
0.5582191.5772532.673352e-08
0.5606441.5770532.684963e-08
0.563081.5768552.696625e-08
0.5655261.576662.708337e-08
0.5679821.5764662.720100e-08
0.570451.5762742.731914e-08
0.5729281.5760832.743780e-08
0.5754171.5758952.755697e-08
0.5779171.5757082.767666e-08
0.5804271.5755232.779686e-08
0.5829491.5753392.791759e-08
0.5854811.5751582.803885e-08
0.5880251.5749772.816063e-08
0.5905791.5747992.828294e-08
0.5931451.5746222.840578e-08
0.5957221.5744472.852916e-08
0.598311.5742732.865307e-08
0.61.5741612.873400e-08
0.6009091.5741012.896691e-08
0.6035191.573932.963588e-08
0.6061411.5737613.030775e-08
0.6087741.5735943.098254e-08
0.6114191.5734283.166026e-08
0.6140751.5732633.234092e-08
0.6167431.57313.302454e-08
0.6194221.5729383.371113e-08
0.6221131.5727773.440071e-08
0.6248161.5726183.509328e-08
0.627531.5724613.578885e-08
0.6302561.5723053.648745e-08
0.6329941.572153.718909e-08
0.6357441.5719963.789377e-08
0.6385061.5718443.860152e-08
0.641281.5716933.931234e-08
0.6440661.5715434.002624e-08
0.6468641.5713944.074325e-08
0.6496741.5712474.146337e-08
0.651.571234.154700e-08
0.6524961.5711014.142634e-08
0.6553311.5709564.128932e-08
0.6581781.5708134.115170e-08
0.6610371.570674.101348e-08
0.6639081.5705294.087466e-08
0.6667931.5703894.073524e-08
0.6696891.570254.059522e-08
0.6725991.5701124.045458e-08
0.6755211.5699754.031334e-08
0.6784551.5698394.017148e-08
0.6814031.5697054.002900e-08
0.6843631.5695713.988591e-08
0.6873361.5694393.974219e-08
0.6903221.5693073.959785e-08
0.6933211.5691773.945288e-08
0.6963331.5690483.930728e-08
0.6993581.5689193.916105e-08
0.71.5688923.913000e-08
0.7023961.5687923.957142e-08
0.7054471.5686654.013364e-08
0.7085121.568544.069830e-08
0.711591.5684164.126541e-08
0.7146811.5682924.183498e-08
0.7177861.5681694.240703e-08
0.7209041.5680484.298156e-08
0.7240361.5679274.355859e-08
0.7271811.5678074.413813e-08
0.730341.5676884.472018e-08
0.7335131.567574.530477e-08
0.73671.5674524.589189e-08
0.73991.5673364.648156e-08
0.7431141.567224.707379e-08
0.7463421.5671064.766860e-08
0.7495851.5669924.826599e-08
0.7528411.5668784.886598e-08
0.7561121.5667664.946857e-08
0.7593961.5666555.007378e-08
0.7626951.5665445.068162e-08
0.7660091.5664345.129210e-08
0.7693361.5663245.190524e-08
0.7726791.5662165.252103e-08
0.7760351.5661085.313950e-08
0.7794071.5660015.376066e-08
0.7827931.5658955.438452e-08
0.7861931.5657895.501109e-08
0.7896091.5656845.564037e-08
0.7930391.565585.627240e-08
0.7964841.5654765.690716e-08
0.7999441.5653735.754469e-08
0.81.5653715.755500e-08
0.8034191.5652715.656856e-08
0.8069091.5651695.556163e-08
0.8104151.5650685.455032e-08
0.8139351.5649685.353462e-08
0.8174711.5648685.251450e-08
0.8210231.5647695.148996e-08
0.8245891.564675.046096e-08
0.8281721.5645724.942749e-08
0.8317691.5644754.838954e-08
0.8353831.5643784.734707e-08
0.8390121.5642824.630007e-08
0.8426571.5641864.524853e-08
0.8463171.5640914.419242e-08
0.8499941.5639964.313172e-08
0.8536871.5639024.206641e-08
0.8573951.5638094.099648e-08
0.861121.5637163.992189e-08
0.8648611.5636233.884264e-08
0.8686181.5635313.775870e-08
0.8723911.563443.667005e-08
0.8761811.5633493.557668e-08
0.8799881.5632583.447855e-08
0.8838111.5631683.337565e-08
0.887651.5630793.226796e-08
0.8915061.5629893.115546e-08
0.8953791.5629013.003812e-08
0.8992691.5628122.891593e-08
0.91.5627962.870500e-08
0.9031751.5627252.906015e-08
0.9070991.5626372.949896e-08
0.911041.562552.993969e-08
0.9149981.5624643.038232e-08
0.9189721.5623773.082688e-08
0.9229651.5622923.127337e-08
0.9269741.5622063.172181e-08
0.9310011.5621213.217218e-08
0.9350461.5620363.262452e-08
0.9391081.5619523.307882e-08
0.9431881.5618683.353509e-08
0.9472851.5617853.399335e-08
0.95141.5617013.445360e-08
0.9555331.5616183.491584e-08
0.9596841.5615363.538010e-08
0.9638531.5614543.584637e-08
0.9680411.5613723.631467e-08
0.9722461.561293.678500e-08
0.976471.5612093.725737e-08
0.9807121.5611283.773180e-08
0.9849721.5610473.820829e-08
0.9892511.5609673.868685e-08
0.9935491.5608863.916748e-08
0.9978651.5608063.965021e-08
11.5607673.988900e-08
1.00221.5607273.987124e-08
1.006551.5606473.983608e-08
1.010931.5605683.980077e-08
1.015321.5604893.976531e-08
1.019731.5604113.972969e-08
1.024161.5603323.969392e-08
1.028611.5602543.965799e-08
1.033081.5601763.962191e-08
1.037561.5600983.958567e-08
1.042071.5600213.954927e-08
1.04661.5599433.951271e-08
1.051151.5598663.947600e-08
1.055711.5597893.943913e-08
1.06031.5597123.940209e-08
1.06491.5596363.936490e-08
1.069531.5595593.932754e-08
1.074181.5594833.929002e-08
1.078841.5594073.925234e-08
1.083531.5593313.921449e-08
1.088241.5592553.917649e-08
1.092961.5591793.913831e-08
1.097711.5591033.909997e-08
1.102481.5590283.906146e-08
1.107271.5589523.902279e-08
1.112081.5588773.898394e-08
1.116911.5588023.894493e-08
1.121761.5587273.890575e-08
1.126641.5586523.886640e-08
1.131531.5585773.882688e-08
1.136451.5585023.878718e-08
1.141381.5584273.874732e-08
1.146341.5583533.870728e-08
1.151321.5582783.866707e-08
1.156321.5582033.862668e-08
1.161351.5581293.858611e-08
1.166391.5580543.854537e-08
1.171461.557983.850446e-08
1.176551.5579063.846336e-08
1.181661.5578313.842209e-08
1.186791.5577573.838064e-08
1.191951.5576823.833901e-08
1.197131.5576083.829719e-08
1.21.5575673.827400e-08
1.202331.5575343.887021e-08
1.207551.5574594.020764e-08
1.21281.5573854.155088e-08
1.218071.5573114.289995e-08
1.223361.5572364.425488e-08
1.228671.5571624.561570e-08
1.234011.5570874.698242e-08
1.239371.5570134.835509e-08
1.244751.5569384.973372e-08
1.250161.5568635.111834e-08
1.255591.5567895.250898e-08
1.261051.5567145.390565e-08
1.266531.5566395.530839e-08
1.272031.5565645.671723e-08
1.277551.5564895.813219e-08
1.28311.5564145.955329e-08
1.288681.5563396.098057e-08
1.294281.5562646.241405e-08
1.29991.5561886.385375e-08
1.305551.5561136.529971e-08
1.311221.5560376.675195e-08
1.316911.5559616.821050e-08
1.322641.5558856.967539e-08
1.328381.5558097.114664e-08
1.334151.5557337.262428e-08
1.339951.5556577.410834e-08
1.345771.555587.559885e-08
1.351621.5555047.709584e-08
1.357491.5554277.859932e-08
1.363381.555358.010934e-08
1.369311.5552728.162592e-08
1.375261.5551958.314908e-08
1.381231.5551178.467887e-08
1.387231.555048.621530e-08
1.393261.5549628.775840e-08
1.399311.5548838.930821e-08
1.41.5548748.948500e-08
1.405391.5548059.052161e-08
1.411491.5547269.169612e-08
1.417631.5546479.287574e-08
1.423781.5545689.406048e-08
1.429971.5544899.525037e-08
1.436181.5544099.644543e-08
1.442421.5543299.764567e-08
1.448691.5542499.885114e-08
1.454981.5541681.000618e-07
1.46131.5540871.012778e-07
1.467651.5540061.024990e-07
1.474031.5539251.037256e-07
1.480431.5538431.049575e-07
1.486861.5537611.061947e-07
1.493321.5536791.074373e-07
1.499811.5535961.086853e-07
1.506321.5535131.099387e-07
1.512871.553431.111976e-07
1.519441.5533461.124619e-07
1.526041.5532621.137317e-07
1.532671.5531781.150071e-07
1.539331.5530931.162880e-07
1.546011.5530081.175744e-07
1.552731.5529231.188665e-07
1.559481.5528371.201641e-07
1.566251.552751.214674e-07
1.573051.5526641.227763e-07
1.579891.5525771.240910e-07
1.586751.5524891.254113e-07
1.593641.5524011.267374e-07
1.61.552321.279600e-07
1.600571.5523131.286264e-07
1.607521.5522241.367857e-07
1.61451.5521351.449804e-07
1.621521.5520451.532108e-07
1.628561.5519551.614768e-07
1.635641.5518641.697788e-07
1.642741.5517731.781169e-07
1.649881.5516811.864912e-07
1.657051.5515891.949018e-07
1.664251.5514962.033490e-07
1.671481.5514032.118329e-07
1.678741.5513092.203537e-07
1.686031.5512152.289114e-07
1.693351.551122.375064e-07
1.700711.5510252.461387e-07
1.70811.5509292.548084e-07
1.715521.5508332.635159e-07
1.722971.5507362.722612e-07
1.730461.5506382.810444e-07
1.737971.550542.898658e-07
1.745521.5504412.987256e-07
1.753111.5503423.076238e-07
1.760721.5502423.165607e-07
1.768371.5501413.255364e-07
1.776051.550043.345511e-07
1.783771.5499383.436050e-07
1.791521.5498353.526982e-07
1.79931.5497323.618309e-07
1.81.5497233.626500e-07
1.807121.5496283.722771e-07
1.814971.5495233.828942e-07
1.822851.5494183.935574e-07
1.830771.5493124.042669e-07
1.838731.5492054.150230e-07
1.846711.5490984.258258e-07
1.854741.548994.366755e-07
1.862791.5488814.475723e-07
1.870891.5487714.585165e-07
1.879011.5486614.695082e-07
1.887181.548554.805477e-07
1.895371.5484384.916351e-07
1.903611.5483255.027707e-07
1.911881.5482125.139547e-07
1.920181.5480975.251872e-07
1.928531.5479825.364686e-07
1.93691.5478665.477990e-07
1.945321.5477495.591785e-07
1.953771.5476325.706076e-07
1.962261.5475135.820862e-07
1.970781.5473945.936148e-07
1.979341.5472736.051934e-07
1.987941.5471526.168223e-07
1.996581.547036.285018e-07
21.5469816.331300e-07
2.005251.5469076.593545e-07
2.013961.5467837.028573e-07
2.022711.5466587.465491e-07
2.03151.5465327.904308e-07
2.040321.5464058.345030e-07
2.049191.5462778.787667e-07
2.058091.5461499.232227e-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
—