Optical constants

Refractive index of J-LASKH2 (HIKARI)

J-LASKH2: 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
1.755
Extinction coefficient k
3.17544e-08
Permittivity ε1
3.08002
Permittivity ε2
1.11458e-07
Absorption coefficient α
0.00679097 cm⁻¹
Penetration depth δ = λ/(2πk)
2.94509e+09 nm
Abbe number Vd
52.336
Chromatic dispersion dn/dλ
-0.0743692 µm⁻¹
Group index ng
1.7987
Group velocity dispersion
131.815 fs²/mm
Dispersion parameter D
-719.121 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-LASKH2 (HIKARI): J-LASKH2
hikari_j_laskh2 = ls.fetch_refractiveindex("specs", "HIKARI-optical", "J-LASKH2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(hikari_j_laskh2.range_nm)  # (365.015, 2058.09) nm
eps = hikari_j_laskh2.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=3.01618042−0.0139280117⁢λ2.0−0.000204284446⁢λ4.0+0.0227027519⁢λ−2.0+0.000317846393⁢λ−4.0+1.01400049×10-5⁢λ−6.0+3.63521536×10-8⁢λ−8.0

Valid from 0.365015 to 2.05809 µm.

Coefficients as stored
CiValue
C13.01618042
C2-0.0139280117
C32.0
C4-0.000204284446
C54.0
C60.0227027519
C7-2.0
C80.000317846393
C9-4.0
C101.01400049e-05
C11-6.0
C123.63521536e-08
C13-8.0

Comments and conditions

Conditions

temperature
296 K

Properties

thermal dispersion
type: formula A, coefficients: 2.7626e-06 1.1757e-08 -7.6008e-13 5.5794e-07 6.5081e-10 0.17656
nd
1.755000
Vd
52.336325
density
value: 4290
thermal expansion
value: 6.1e-06, temperature range: 243 343
dPgF
-0.009
resistance
phosphate: 2.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 296.0 K): dn/dT = 2.52e-06 K⁻¹ at 633 nm, dn/dT = 1.79e-06 K⁻¹ at 1310 nm, dn/dT = 1.73e-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-LASKH2 (HIKARI), J-LASKH2: n and k versus wavelength
λ (µm)nk
0.3650151.7908162.705783e-07
0.3666011.7902832.534843e-07
0.3681931.7897562.363161e-07
0.3697931.7892342.190733e-07
0.371.7891672.168400e-07
0.3713991.7887182.068672e-07
0.3730131.7882071.953682e-07
0.3746331.7877021.838192e-07
0.3762611.7872011.722201e-07
0.3778951.7867061.605705e-07
0.3795371.7862171.488704e-07
0.381.786081.455700e-07
0.3811861.7857321.398978e-07
0.3828421.7852521.319760e-07
0.3845051.7847781.240198e-07
0.3861751.7843081.160290e-07
0.3878531.7838431.080036e-07
0.3895381.7833839.994323e-08
0.391.7832589.773200e-08
0.391231.7829279.482106e-08
0.392931.7824779.079880e-08
0.3946371.782038.675906e-08
0.3963511.7815898.270178e-08
0.3980731.7811527.862687e-08
0.3998021.7807197.453426e-08
0.41.780677.406600e-08
0.4015391.7802917.225370e-08
0.4032831.7798677.019952e-08
0.4050351.7794476.813642e-08
0.4067951.7790326.606435e-08
0.4085621.7786216.398328e-08
0.4103371.7782146.189317e-08
0.412121.7778115.979398e-08
0.413911.7774125.768567e-08
0.4157081.7770165.556821e-08
0.4175141.7766255.344154e-08
0.4193281.7762385.130563e-08
0.421.7760965.051400e-08
0.4211491.7758554.983671e-08
0.4229791.7754754.875863e-08
0.4248171.7750994.767587e-08
0.4266621.7747274.658841e-08
0.4285161.7743594.549623e-08
0.4303771.7739944.439929e-08
0.4322471.7736324.329760e-08
0.4341251.7732754.219111e-08
0.436011.772924.107983e-08
0.4379051.7725693.996371e-08
0.4398071.7722223.884274e-08
0.441.7721873.872900e-08
0.4417181.7718783.824507e-08
0.4436371.7715373.770441e-08
0.4455641.7711993.716141e-08
0.4474991.7708653.661604e-08
0.4494431.7705343.606831e-08
0.4513961.7702063.551819e-08
0.4533571.7698813.496569e-08
0.4553261.769563.441079e-08
0.4573041.7692413.385347e-08
0.4592911.7689253.329374e-08
0.461.7688143.309400e-08
0.4612861.7686133.269124e-08
0.463291.7683033.206381e-08
0.4653031.7679963.143365e-08
0.4673241.7676923.080076e-08
0.4693541.7673913.016511e-08
0.4713931.7670932.952671e-08
0.4734411.7667982.888553e-08
0.4754981.7665052.824156e-08
0.4775641.7662152.759480e-08
0.4796381.7659282.694523e-08
0.481.7658782.683200e-08
0.4817221.7656432.692826e-08
0.4838151.7653612.704524e-08
0.4859171.7650822.716274e-08
0.4880271.7648052.728074e-08
0.4901481.7645312.739925e-08
0.4922771.7642592.751828e-08
0.4944151.763992.763782e-08
0.4965631.7637232.775789e-08
0.4987211.7634592.787848e-08
0.51.7633042.795000e-08
0.5008871.7631972.792144e-08
0.5030631.7629372.785137e-08
0.5052481.762682.778100e-08
0.5074431.7624252.771032e-08
0.5096481.7621732.763934e-08
0.5118621.7619222.756805e-08
0.5140861.7616742.749645e-08
0.5163191.7614282.742453e-08
0.5185621.7611842.735231e-08
0.5208151.7609432.727977e-08
0.5230771.7607032.720692e-08
0.5253491.7604662.713375e-08
0.5276321.7602312.706026e-08
0.5299241.7599982.698645e-08
0.5322261.7597672.691232e-08
0.5345381.7595382.683787e-08
0.536861.759312.676310e-08
0.5391931.7590852.668800e-08
0.5415351.7588622.661258e-08
0.5438871.7586412.653682e-08
0.546251.7584222.646074e-08
0.5486231.7582042.638433e-08
0.551.7580792.634000e-08
0.5510071.7579892.648495e-08
0.55341.7577752.682965e-08
0.5558041.7575632.717584e-08
0.5582191.7573532.752353e-08
0.5606441.7571452.787274e-08
0.563081.7569382.822346e-08
0.5655261.7567332.857570e-08
0.5679821.756532.892948e-08
0.570451.7563292.928479e-08
0.5729281.7561292.964165e-08
0.5754171.7559313.000006e-08
0.5779171.7557353.036002e-08
0.5804271.755543.072155e-08
0.5829491.7553473.108464e-08
0.5854811.7551563.144932e-08
0.5880251.7549663.181558e-08
0.5905791.7547773.218343e-08
0.5931451.754593.255288e-08
0.5957221.7544053.292393e-08
0.598311.7542213.329660e-08
0.61.7541023.354000e-08
0.6009091.7540393.359081e-08
0.6035191.7538583.373673e-08
0.6061411.7536793.388329e-08
0.6087741.7535013.403049e-08
0.6114191.7533243.417833e-08
0.6140751.7531493.432681e-08
0.6167431.7529753.447593e-08
0.6194221.7528033.462570e-08
0.6221131.7526323.477612e-08
0.6248161.7524623.492720e-08
0.627531.7522943.507893e-08
0.6302561.7521263.523132e-08
0.6329941.7519613.538437e-08
0.6357441.7517963.553809e-08
0.6385061.7516333.569248e-08
0.641281.7514713.584754e-08
0.6440661.751313.600327e-08
0.6468641.7511513.615967e-08
0.6496741.7509923.631676e-08
0.651.7509743.633500e-08
0.6524961.7508353.675473e-08
0.6553311.7506793.723139e-08
0.6581781.7505243.771013e-08
0.6610371.7503713.819094e-08
0.6639081.7502183.867385e-08
0.6667931.7500673.915885e-08
0.6696891.7499163.964596e-08
0.6725991.7497674.013519e-08
0.6755211.7496194.062654e-08
0.6784551.7494724.112002e-08
0.6814031.7493264.161565e-08
0.6843631.7491814.211344e-08
0.6873361.7490374.261338e-08
0.6903221.7488944.311550e-08
0.6933211.7487524.361980e-08
0.6963331.7486114.412629e-08
0.6993581.7484724.463497e-08
0.71.7484424.474300e-08
0.7023961.7483334.551236e-08
0.7054471.7481954.649224e-08
0.7085121.7480574.747639e-08
0.711591.7479214.846481e-08
0.7146811.7477864.945752e-08
0.7177861.7476525.045455e-08
0.7209041.7475185.145590e-08
0.7240361.7473865.246161e-08
0.7271811.7472545.347169e-08
0.730341.7471235.448615e-08
0.7335131.7469935.550502e-08
0.73671.7468645.652832e-08
0.73991.7467365.755606e-08
0.7431141.7466095.858827e-08
0.7463421.7464825.962496e-08
0.7495851.7463566.066616e-08
0.7528411.7462316.171187e-08
0.7561121.7461076.276214e-08
0.7593961.7459836.381696e-08
0.7626951.745866.487637e-08
0.7660091.7457386.594038e-08
0.7693361.7456176.700901e-08
0.7726791.7454966.808228e-08
0.7760351.7453776.916022e-08
0.7794071.7452577.024283e-08
0.7827931.7451397.133016e-08
0.7861931.7450217.242220e-08
0.7896091.7449047.351899e-08
0.7930391.7447877.462055e-08
0.7964841.7446727.572689e-08
0.7999441.7445567.683803e-08
0.81.7445557.685600e-08
0.8034191.7444427.496389e-08
0.8069091.7443287.303246e-08
0.8104151.7442157.109264e-08
0.8139351.7441026.914439e-08
0.8174711.743996.718768e-08
0.8210231.7438786.522247e-08
0.8245891.7437676.324872e-08
0.8281721.7436576.126640e-08
0.8317691.7435475.927546e-08
0.8353831.7434385.727588e-08
0.8390121.7433295.526761e-08
0.8426571.7432215.325061e-08
0.8463171.7431135.122486e-08
0.8499941.7430064.919030e-08
0.8536871.7428994.714690e-08
0.8573951.7427934.509463e-08
0.861121.7426874.303344e-08
0.8648611.7425824.096330e-08
0.8686181.7424773.888416e-08
0.8723911.7423733.679599e-08
0.8761811.7422693.469875e-08
0.8799881.7421663.259240e-08
0.8838111.7420633.047690e-08
0.887651.741962.835221e-08
0.8915061.7418582.621829e-08
0.8953791.7417562.407510e-08
0.8992691.7416552.192260e-08
0.91.7416362.151800e-08
0.9031751.7415542.210137e-08
0.9070991.7414542.282218e-08
0.911041.7413532.354611e-08
0.9149981.7412542.427320e-08
0.9189721.7411542.500344e-08
0.9229651.7410552.573685e-08
0.9269741.7409562.647345e-08
0.9310011.7408582.721325e-08
0.9350461.740762.795626e-08
0.9391081.7406622.870250e-08
0.9431881.7405642.945198e-08
0.9472851.7404673.020472e-08
0.95141.740373.096073e-08
0.9555331.7402743.172002e-08
0.9596841.7401773.248261e-08
0.9638531.7400813.324852e-08
0.9680411.7399863.401775e-08
0.9722461.739893.479032e-08
0.976471.7397953.556625e-08
0.9807121.73973.634555e-08
0.9849721.7396053.712824e-08
0.9892511.739513.791432e-08
0.9935491.7394163.870382e-08
0.9978651.7393223.949675e-08
11.7392753.988900e-08
1.00221.7392283.966054e-08
1.006551.7391343.920837e-08
1.010931.739043.875425e-08
1.015321.7389473.829815e-08
1.019731.7388543.784007e-08
1.024161.7387613.737999e-08
1.028611.7386683.691792e-08
1.033081.7385753.645385e-08
1.037561.7384823.598775e-08
1.042071.738393.551963e-08
1.04661.7382973.504948e-08
1.051151.7382053.457729e-08
1.055711.7381133.410304e-08
1.06031.7380213.362674e-08
1.06491.7379293.314836e-08
1.069531.7378373.266791e-08
1.074181.7377453.218537e-08
1.078841.7376533.170073e-08
1.083531.7375623.121399e-08
1.088241.737473.072513e-08
1.092961.7373793.023415e-08
1.097711.7372872.974104e-08
1.102481.7371962.924578e-08
1.107271.7371042.874838e-08
1.112081.7370132.824881e-08
1.116911.7369212.774707e-08
1.121761.736832.724315e-08
1.126641.7367382.673704e-08
1.131531.7366472.622874e-08
1.136451.7365562.571823e-08
1.141381.7364642.520549e-08
1.146341.7363732.469053e-08
1.151321.7362812.417334e-08
1.156321.7361892.365390e-08
1.161351.7360982.313220e-08
1.166391.7360062.260823e-08
1.171461.7359142.208199e-08
1.176551.7358222.155346e-08
1.181661.735732.102264e-08
1.186791.7356382.048951e-08
1.191951.7355461.995406e-08
1.197131.7354541.941629e-08
1.21.7354031.911800e-08
1.202331.7353611.980655e-08
1.207551.7352692.135110e-08
1.21281.7351762.290236e-08
1.218071.7350842.446036e-08
1.223361.7349912.602513e-08
1.228671.7348982.759670e-08
1.234011.7348042.917509e-08
1.239371.7347113.076034e-08
1.244751.7346173.235248e-08
1.250161.7345243.395153e-08
1.255591.734433.555753e-08
1.261051.7343353.717051e-08
1.266531.7342413.879049e-08
1.272031.7341464.041752e-08
1.277551.7340524.205161e-08
1.28311.7339574.369280e-08
1.288681.7338614.534111e-08
1.294281.7337664.699659e-08
1.29991.733674.865927e-08
1.305551.7335745.032916e-08
1.311221.7334785.200631e-08
1.316911.7333815.369074e-08
1.322641.7332845.538249e-08
1.328381.7331875.708160e-08
1.334151.7330895.878808e-08
1.339951.7329926.050198e-08
1.345771.7328936.222332e-08
1.351621.7327956.395214e-08
1.357491.7326966.568847e-08
1.363381.7325976.743234e-08
1.369311.7324976.918379e-08
1.375261.7323987.094285e-08
1.381231.7322977.270955e-08
1.387231.7321977.448392e-08
1.393261.7320967.626600e-08
1.399311.7319947.805583e-08
1.41.7319837.826000e-08
1.405391.7318928.029280e-08
1.411491.731798.259604e-08
1.417631.7316878.490929e-08
1.423781.7315848.723258e-08
1.429971.7314818.956597e-08
1.436181.7313779.190949e-08
1.442421.7312729.426319e-08
1.448691.7311679.662712e-08
1.454981.7310629.900132e-08
1.46131.7309561.013858e-07
1.467651.730851.037807e-07
1.474031.7307431.061860e-07
1.480431.7306361.086017e-07
1.486861.7305281.110279e-07
1.493321.7304191.134647e-07
1.499811.730311.159120e-07
1.506321.7302011.183700e-07
1.512871.730091.208387e-07
1.519441.729981.233180e-07
1.526041.7298691.258082e-07
1.532671.7297571.283092e-07
1.539331.7296441.308210e-07
1.546011.7295311.333437e-07
1.552731.7294171.358774e-07
1.559481.7293031.384221e-07
1.566251.7291881.409779e-07
1.573051.7290731.435448e-07
1.579891.7289561.461228e-07
1.586751.7288391.487120e-07
1.593641.7287221.513125e-07
1.61.7286131.537100e-07
1.600571.7286031.543450e-07
1.607521.7284841.621202e-07
1.61451.7283651.699291e-07
1.621521.7282441.777719e-07
1.628561.7281231.856488e-07
1.635641.7280011.935599e-07
1.642741.7278782.015053e-07
1.649881.7277552.094853e-07
1.657051.7276312.175000e-07
1.664251.7275062.255495e-07
1.671481.727382.336339e-07
1.678741.7272532.417535e-07
1.686031.7271262.499083e-07
1.693351.7269972.580986e-07
1.700711.7268682.663244e-07
1.70811.7267382.745860e-07
1.715521.7266072.828835e-07
1.722971.7264752.912170e-07
1.730461.7263432.995867e-07
1.737971.7262093.079928e-07
1.745521.7260743.164354e-07
1.753111.7259393.249146e-07
1.760721.7258033.334307e-07
1.768371.7256653.419839e-07
1.776051.7255273.505741e-07
1.783771.7253883.592017e-07
1.791521.7252473.678668e-07
1.79931.7251063.765695e-07
1.81.7250933.773500e-07
1.807121.7249643.947673e-07
1.814971.724824.139756e-07
1.822851.7246764.332674e-07
1.830771.724534.526430e-07
1.838731.7243844.721027e-07
1.846711.7242364.916470e-07
1.854741.7240875.112762e-07
1.862791.7239375.309907e-07
1.870891.7237865.507908e-07
1.879011.7236345.706769e-07
1.887181.7234815.906494e-07
1.895371.7233266.107087e-07
1.903611.723176.308551e-07
1.911881.7230136.510891e-07
1.920181.7228556.714109e-07
1.928531.7226966.918210e-07
1.93691.7225357.123198e-07
1.945321.7223737.329077e-07
1.953771.722217.535850e-07
1.962261.7220457.743521e-07
1.970781.721887.952094e-07
1.979341.7217128.161573e-07
1.987941.7215448.371963e-07
1.996581.7213748.583266e-07
21.7213068.667000e-07
2.005251.7212039.132743e-07
2.013961.721039.905346e-07
2.022711.7208561.068131e-06
2.03151.720681.146064e-06
2.040321.7205031.224335e-06
2.049191.7203251.302947e-06
2.058091.7201451.381900e-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
—