Optical constants

Refractive index of S-FSL5 (OHARA)

S-FSL5: n,k 0.28–2.4 µm

Data
formula 2 + tabulated k
Range
0.28–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.28–2.4 µm
Refractive index n
1.48749
Extinction coefficient k
4.67830e-09
Permittivity ε1
2.21262
Permittivity ε2
1.39178e-08
Absorption coefficient α
0.0010005 cm⁻¹
Penetration depth δ = λ/(2πk)
1.99901e+10 nm
Abbe number Vd
70.236
Chromatic dispersion dn/dλ
-0.0360983 µm⁻¹
Group index ng
1.5087
Group velocity dispersion
59.7378 fs²/mm
Dispersion parameter D
-325.901 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

# S-FSL5 (OHARA): S-FSL5
ohara_s_fsl5 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-FSL5", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_fsl5.range_nm)  # (280, 2400) nm
eps = ohara_s_fsl5.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

Sellmeier (C in µm²) (formula 2), λ in µm
n2−1=1.17447043λ2λ2−0.00841855181+0.0140056154λ2λ2+0.0581790767+1.19272435λ2λ2−129.599726

Valid from 0.28 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.17447043
C30.00841855181
C40.0140056154
C5-0.0581790767
C61.19272435
C7129.599726

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -6.61e-06 1.85e-08 -1.39e-11 4.98e-07 1.07e-09 0.0
nd
1.487490
Vd
70.236252
glass code
487702
density
value: 2460
thermal expansion
value: 9e-06, temperature range: 243 343; value: 9.5e-06, temperature range: 293 573
dPgF
0.0022
resistance
acid: 3.0; climatic: 1.0; phosphate: 2.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = -2.18e-06 K⁻¹ at 633 nm, dn/dT = -2.52e-06 K⁻¹ at 1310 nm, dn/dT = -2.54e-06 K⁻¹ at 1550 nm

References

Cite

OHARA Zemax catalog 2017-11-30 (obtained from http://www.ohara-inc.co.jp); See also OHARA 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 430 wavelengths, the same grid as the API and the library
S-FSL5 (OHARA), S-FSL5: n and k versus wavelength
λ (µm)nk
0.281.5241634.546000e-06
0.2815121.5236174.153205e-06
0.2830321.5230783.758289e-06
0.284561.5225463.361240e-06
0.2860961.5220212.962049e-06
0.2876411.5215032.560701e-06
0.2891941.5209922.157187e-06
0.291.520731.947700e-06
0.2907551.5204871.857358e-06
0.2923251.5199881.669549e-06
0.2939031.5194961.480727e-06
0.295491.5190111.290884e-06
0.2970851.5185311.100017e-06
0.2986891.5180589.081199e-07
0.31.5176777.513200e-07
0.3003021.517597.373109e-07
0.3019231.5171296.621061e-07
0.3035531.5166735.864953e-07
0.3051921.5162245.104762e-07
0.306841.515784.340468e-07
0.3084971.5153413.572046e-07
0.311.514952.874800e-07
0.3101621.5149082.844566e-07
0.3118371.5144812.532791e-07
0.3135211.5140592.219333e-07
0.3152131.5136421.904182e-07
0.3169151.513231.587330e-07
0.3186261.5128241.268767e-07
0.321.5125021.013000e-07
0.3203471.5124229.925750e-08
0.3220761.5120268.906288e-08
0.3238151.5116347.881321e-08
0.3255631.5112486.850821e-08
0.3273211.5108665.814757e-08
0.3290881.5104894.773099e-08
0.331.5102974.235700e-08
0.3308651.5101164.057285e-08
0.3326511.5097483.688847e-08
0.3344471.5093853.318420e-08
0.3362531.5090262.945994e-08
0.3380691.5086712.571556e-08
0.3398941.5083212.195097e-08
0.341.5083012.173200e-08
0.3417291.5079752.038844e-08
0.3435741.5076331.895467e-08
0.3454291.5072951.751317e-08
0.3472941.5069621.606388e-08
0.3491691.5066321.460677e-08
0.351.5064881.396100e-08
0.3510541.5063071.400306e-08
0.352951.5059851.407869e-08
0.3548551.5056681.415472e-08
0.3567711.5053541.423116e-08
0.3586971.5050441.430802e-08
0.361.5048371.436000e-08
0.3606341.5047371.382337e-08
0.3625811.5044341.217509e-08
0.3645391.5041351.051790e-08
0.3665071.503848.851765e-09
0.3684861.5035487.176635e-09
0.371.5033275.894600e-09
0.3704751.5032595.902167e-09
0.3724751.5029745.934031e-09
0.3744861.5026925.966066e-09
0.3765081.5024135.998275e-09
0.3785411.5021386.030657e-09
0.381.5019446.053900e-09
0.3805851.5018665.881478e-09
0.382641.5015975.275557e-09
0.3847051.5013324.666366e-09
0.3867821.5010694.053885e-09
0.3888711.500813.438097e-09
0.391.5006713.105100e-09
0.390971.5005533.112823e-09
0.3930811.50033.129626e-09
0.3952031.5000493.146519e-09
0.3973371.4998013.163504e-09
0.3994821.4995573.180580e-09
0.41.4994983.184700e-09
0.4016391.4993153.197748e-09
0.4038081.4990763.215009e-09
0.4059881.4988393.232364e-09
0.408181.4986053.249812e-09
0.4103841.4983743.267354e-09
0.4125991.4981463.284991e-09
0.4148271.497923.302723e-09
0.4170671.4976973.320551e-09
0.4193181.4974763.338475e-09
0.421.497413.343900e-09
0.4215821.4972583.356504e-09
0.4238591.4970423.374633e-09
0.4261471.4968293.392861e-09
0.4284481.4966183.411187e-09
0.4307611.4964093.429611e-09
0.4330871.4962033.448136e-09
0.4354251.4959993.466760e-09
0.4377761.4957973.485485e-09
0.441.495613.503200e-09
0.4401391.4955983.504310e-09
0.4425161.4954013.523226e-09
0.4449051.4952063.542243e-09
0.4473071.4950133.561364e-09
0.4497221.4948223.580588e-09
0.452151.4946333.599915e-09
0.4545911.4944473.619347e-09
0.4570461.4942623.638884e-09
0.4595131.494083.658526e-09
0.461.4940443.662400e-09
0.4619941.4938993.678274e-09
0.4644891.4937213.698129e-09
0.4669961.4935443.718092e-09
0.4695181.4933693.738161e-09
0.4720531.4931963.758340e-09
0.4746011.4930253.778627e-09
0.4771641.4928563.799024e-09
0.479741.4926893.819531e-09
0.481.4926723.821600e-09
0.482331.4925233.840160e-09
0.4849341.4923593.860902e-09
0.4875531.4921973.881756e-09
0.4901851.4920373.902722e-09
0.4928311.4918783.923802e-09
0.4954921.4917213.944995e-09
0.4981671.4915663.966303e-09
0.51.491463.980900e-09
0.5008571.4914123.987724e-09
0.5035611.491264.009254e-09
0.506281.4911094.030901e-09
0.5090131.490964.052665e-09
0.5117621.4908124.074546e-09
0.5145251.4906664.096545e-09
0.5173031.4905224.118663e-09
0.5200961.4903794.140901e-09
0.5229041.4902374.163258e-09
0.5257271.4900974.185737e-09
0.5285651.4899584.208336e-09
0.5314191.4898214.231058e-09
0.5342881.4896854.253902e-09
0.5371731.489554.276870e-09
0.5400731.4894174.299962e-09
0.5429891.4892854.323178e-09
0.5459211.4891544.346520e-09
0.5488681.4890254.369987e-09
0.551.4889754.379000e-09
0.5518311.4888964.393578e-09
0.5548111.4887694.417294e-09
0.5578061.4886444.441138e-09
0.5608181.4885194.465110e-09
0.5638461.4883964.489212e-09
0.566891.4882744.513445e-09
0.5699511.4881534.537808e-09
0.5730281.4880334.562302e-09
0.5761221.4879144.586929e-09
0.5792321.4877974.611689e-09
0.582361.487684.636582e-09
0.5855041.4875654.661610e-09
0.5886651.487454.686773e-09
0.5918431.4873374.712072e-09
0.5950391.4872254.737507e-09
0.5982511.4871134.763080e-09
0.61.4870534.777000e-09
0.6014811.4870034.788794e-09
0.6047291.4868944.814650e-09
0.6079941.4867854.840645e-09
0.6112761.4866784.866781e-09
0.6145771.4865714.893059e-09
0.6178951.4864664.919478e-09
0.6212311.4863614.946039e-09
0.6245851.4862584.972744e-09
0.6279571.4861554.999594e-09
0.6313471.4860535.026588e-09
0.6347561.4859525.053728e-09
0.6381831.4858515.081014e-09
0.6416291.4857525.108448e-09
0.6450931.4856535.136030e-09
0.6485761.4855565.163761e-09
0.651.4855165.175100e-09
0.6520781.4854595.191642e-09
0.6555981.4853625.219673e-09
0.6591381.4852675.247855e-09
0.6626971.4851725.276190e-09
0.6662741.4850785.304678e-09
0.6698721.4849855.333319e-09
0.6734881.4848925.362115e-09
0.6771251.48485.391066e-09
0.680781.4847095.420174e-09
0.6844561.4846195.449439e-09
0.6881521.4845295.478862e-09
0.6918671.484445.508444e-09
0.6956021.4843515.538186e-09
0.6993581.4842645.568088e-09
0.71.4842495.573200e-09
0.7031341.4841765.598151e-09
0.706931.484095.628377e-09
0.7107471.4840045.658766e-09
0.7145841.4839185.689319e-09
0.7184421.4838335.720038e-09
0.7223211.4837495.750922e-09
0.7262211.4836655.781972e-09
0.7301421.4835825.813191e-09
0.7340841.4834995.844578e-09
0.7380471.4834175.876134e-09
0.7420321.4833365.907861e-09
0.7460391.4832545.939759e-09
0.7500661.4831745.971829e-09
0.7541161.4830946.004072e-09
0.7581881.4830146.036490e-09
0.7622811.4829356.069082e-09
0.7663971.4828566.101851e-09
0.7705351.4827786.134796e-09
0.7746951.48276.167919e-09
0.7788771.4826226.201222e-09
0.7830831.4825456.234704e-09
0.787311.4824686.268366e-09
0.7915611.4823926.302211e-09
0.7958351.4823166.336238e-09
0.81.4822436.369400e-09
0.8001321.4822416.370449e-09
0.8044521.4821666.404844e-09
0.8087951.4820916.439426e-09
0.8131621.4820166.474193e-09
0.8175521.4819426.509149e-09
0.8219661.4818686.544294e-09
0.8264041.4817956.579628e-09
0.8308661.4817226.615153e-09
0.8353521.4816496.650870e-09
0.8398621.4815766.686779e-09
0.8443961.4815046.722883e-09
0.8489551.4814326.759181e-09
0.8535391.481366.795675e-09
0.8581471.4812896.832367e-09
0.862781.4812176.869256e-09
0.8674381.4811466.906345e-09
0.8721221.4810756.943634e-09
0.876831.4810056.981124e-09
0.8815651.4809347.018817e-09
0.8863241.4808647.056713e-09
0.8911091.4807947.094814e-09
0.8959211.4807247.133120e-09
0.91.4806667.165600e-09
0.9007581.4806557.232023e-09
0.9056211.4805857.658306e-09
0.9105111.4805168.086892e-09
0.9154261.4804478.517791e-09
0.9203691.4803788.951016e-09
0.9253381.4803099.386581e-09
0.9303341.480249.824497e-09
0.9353571.4801711.026478e-08
0.9404071.4801031.070744e-08
0.9454841.4800341.115248e-08
0.9505891.4799661.159993e-08
0.9557211.4798981.204980e-08
0.9608811.4798291.250210e-08
0.9660691.4797611.295683e-08
0.9712851.4796931.341403e-08
0.9765291.4796251.387369e-08
0.9818011.4795571.433583e-08
0.9871021.4794891.480047e-08
0.9924321.4794211.526761e-08
0.997791.4793531.573728e-08
11.4793251.593100e-08
1.003181.4792851.598163e-08
1.008591.4792171.606793e-08
1.014041.4791491.615471e-08
1.019511.4790811.624195e-08
1.025021.4790131.632966e-08
1.030551.4789451.641785e-08
1.036121.4788771.650651e-08
1.041711.4788091.659565e-08
1.047331.478741.668528e-08
1.052991.4786721.677538e-08
1.058671.4786041.686598e-08
1.064391.4785351.695706e-08
1.070141.4784671.704863e-08
1.075911.4783981.714070e-08
1.081721.4783291.723327e-08
1.087561.478261.732633e-08
1.093441.4781911.741990e-08
1.099341.4781221.751397e-08
1.105271.4780531.760855e-08
1.111241.4779831.770364e-08
1.117241.4779131.779925e-08
1.123271.4778441.789537e-08
1.129341.4777731.799201e-08
1.135441.4777031.808917e-08
1.141571.4776331.818686e-08
1.147731.4775621.828507e-08
1.153931.4774911.838382e-08
1.160161.477421.848309e-08
1.166421.4773491.858291e-08
1.172721.4772771.868326e-08
1.179051.4772061.878415e-08
1.185421.4771341.888559e-08
1.191821.4770611.898758e-08
1.198251.4769891.909011e-08
1.21.4769691.911800e-08
1.204721.4769162.344195e-08
1.211221.4768432.940132e-08
1.217761.4767693.539286e-08
1.224341.4766954.141674e-08
1.230951.4766214.747316e-08
1.237591.4765475.356226e-08
1.244281.4764725.968425e-08
1.250991.4763976.583929e-08
1.257751.4763217.202756e-08
1.264541.4762457.824924e-08
1.271371.4761698.450451e-08
1.278231.4760929.079356e-08
1.285131.4760159.711656e-08
1.292071.4759381.034737e-07
1.299051.475861.098652e-07
1.306061.4757821.162911e-07
1.313111.4757031.227518e-07
1.32021.4756241.292473e-07
1.327331.4755441.357779e-07
1.33451.4754641.423438e-07
1.34171.4753831.489451e-07
1.348941.4753021.555821e-07
1.356231.475221.622549e-07
1.363551.4751381.689637e-07
1.370911.4750561.757088e-07
1.378311.4749721.824902e-07
1.385751.4748891.893083e-07
1.393241.4748051.961632e-07
1.41.4747282.023600e-07
1.400761.474722.019803e-07
1.408321.4746341.981955e-07
1.415931.4745481.943903e-07
1.423571.4744621.905645e-07
1.431261.4743751.867181e-07
1.438981.4742871.828509e-07
1.446751.4741981.789628e-07
1.454561.4741091.750537e-07
1.462421.474021.711235e-07
1.470311.4739291.671721e-07
1.478251.4738381.631994e-07
1.486231.4737471.592052e-07
1.494261.4736541.551895e-07
1.502321.4735611.511521e-07
1.510431.4734671.470928e-07
1.518591.4733731.430117e-07
1.526791.4732771.389085e-07
1.535031.4731811.347832e-07
1.543321.4730841.306356e-07
1.551651.4729871.264656e-07
1.560031.4728881.222731e-07
1.568451.4727891.180579e-07
1.576921.4726891.138200e-07
1.585431.4725881.095592e-07
1.593991.4724861.052754e-07
1.61.4724151.022700e-07
1.60261.4723841.037552e-07
1.611251.472281.086967e-07
1.619951.4721761.136648e-07
1.62871.4720711.186598e-07
1.637491.4719641.236817e-07
1.646331.4718571.287308e-07
1.655221.4717491.338071e-07
1.664161.471641.389108e-07
1.673141.471531.440421e-07
1.682181.4714191.492011e-07
1.691261.4713071.543880e-07
1.700391.4711941.596028e-07
1.709571.471081.648458e-07
1.71881.4709651.701171e-07
1.728081.4708491.754169e-07
1.737411.4707321.807452e-07
1.746791.4706141.861024e-07
1.756221.4704941.914885e-07
1.76571.4703741.969036e-07
1.775241.4702522.023480e-07
1.784821.4701292.078218e-07
1.794461.4700052.133251e-07
1.81.4699342.164900e-07
1.804151.469882.217123e-07
1.813891.4697542.339798e-07
1.823681.4696262.463135e-07
1.833531.4694982.587137e-07
1.843431.4693672.711810e-07
1.853381.4692362.837155e-07
1.863391.4691032.963177e-07
1.873451.4689693.089880e-07
1.883561.4688343.217267e-07
1.893731.4686973.345341e-07
1.903951.4685593.474107e-07
1.914231.468423.603568e-07
1.924571.4682793.733728e-07
1.934961.4681373.864591e-07
1.945411.4679933.996160e-07
1.955911.4678484.128440e-07
1.966471.4677024.261434e-07
1.977091.4675534.395146e-07
1.987761.4674044.529580e-07
1.998491.4672524.664739e-07
21.4672314.683700e-07
2.009281.46715.505204e-07
2.020131.4669456.465075e-07
2.031041.4667897.430128e-07
2.042011.4666328.400392e-07
2.053031.4664729.375894e-07
2.064111.4663111.035666e-06
2.075261.4661491.134273e-06
2.086461.4659841.233412e-06
2.097731.4658181.333086e-06
2.109051.465651.433298e-06
2.120441.4654811.534051e-06
2.131891.4653091.635348e-06
2.14341.4651361.737193e-06
2.154971.464961.839587e-06
2.166611.4647831.942533e-06
2.17831.4646042.046036e-06
2.190071.4644232.150098e-06
2.21.4642692.238000e-06
2.201891.464242.241985e-06
2.213781.4640552.267051e-06
2.225731.4638682.292252e-06
2.237751.4636792.317590e-06
2.249831.4634882.343064e-06
2.261981.4632942.368676e-06
2.274191.4630992.394426e-06
2.286471.4629012.420316e-06
2.298811.4627022.446345e-06
2.311221.4624992.472514e-06
2.32371.4622952.498825e-06
2.336251.4620892.525278e-06
2.348861.461882.551874e-06
2.361541.4616682.578613e-06
2.374291.4614552.605496e-06
2.387111.4612392.632525e-06
2.41.461022.659700e-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
—