Optical constants

Refractive index of S-LAH55VS (OHARA)

S-LAH55VS: n,k 0.365–2.325 µm

Data
formula 2 + tabulated k
Range
0.365–2.325 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.365–2.325 µm
Refractive index n
1.83481
Extinction coefficient k
4.67830e-09
Permittivity ε1
3.36651
Permittivity ε2
1.71675e-08
Absorption coefficient α
0.0010005 cm⁻¹
Penetration depth δ = λ/(2πk)
1.99901e+10 nm
Abbe number Vd
42.744
Chromatic dispersion dn/dλ
-0.0998543 µm⁻¹
Group index ng
1.89348
Group velocity dispersion
186.385 fs²/mm
Dispersion parameter D
-1016.83 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-LAH55VS (OHARA): S-LAH55VS
ohara_s_lah55vs = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-LAH55VS", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_lah55vs.range_nm)  # (365.015, 2325.42) nm
eps = ohara_s_lah55vs.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=1.92591095λ2λ2−0.0096115249+0.34895346λ2λ2−0.036513298+1.42230744λ2λ2−103.36409

Valid from 0.365015 to 2.32542 µm.

Coefficients as stored
CiValue
C10.0
C21.92591095
C30.0096115249
C40.34895346
C50.036513298
C61.42230744
C7103.36409

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 2.82e-06 1.01e-08 -4.98e-12 6.79e-07 6.67e-10 0.229
nd
1.834809
Vd
42.743680
density
value: 4580
thermal expansion
value: 6.3e-06, temperature range: 243 343
dPgF
-0.0075
resistance
acid: 4.0; climatic: 2.0; phosphate: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 3.06e-06 K⁻¹ at 633 nm, dn/dT = 2.03e-06 K⁻¹ at 1310 nm, dn/dT = 1.94e-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 422 wavelengths, the same grid as the API and the library
S-LAH55VS (OHARA), S-LAH55VS: n and k versus wavelength
λ (µm)nk
0.3650151.8853374.045711e-07
0.3667131.8844943.724343e-07
0.3684191.8836623.401480e-07
0.371.8829043.102200e-07
0.3701331.8828413.087592e-07
0.3718541.882032.897822e-07
0.3735841.881232.707169e-07
0.3753221.880442.515630e-07
0.3770681.8796592.323199e-07
0.3788221.8788892.129873e-07
0.381.8783792.000000e-07
0.3805841.8781291.962873e-07
0.3823541.8773781.850296e-07
0.3841331.8766361.737196e-07
0.385921.8759031.623569e-07
0.3877151.875181.509414e-07
0.3895181.8744651.394728e-07
0.391.8742771.364100e-07
0.391331.873761.311614e-07
0.3931511.8730631.239792e-07
0.3949791.8723741.167637e-07
0.3968171.8716941.095145e-07
0.3986631.8710221.022317e-07
0.41.8705429.695500e-08
0.4005171.8703589.601793e-08
0.402381.8697029.264147e-08
0.4042521.8690548.924931e-08
0.4061321.8684148.584137e-08
0.4080221.8677818.241757e-08
0.409921.8671567.897785e-08
0.4118261.8665387.552213e-08
0.4137421.8659287.205034e-08
0.4156671.8653246.856239e-08
0.41761.8647286.505822e-08
0.4195431.8641396.153775e-08
0.421.8640016.070900e-08
0.4214941.8635565.933142e-08
0.4234551.8629815.752389e-08
0.4254251.8624125.570795e-08
0.4274041.8618495.388356e-08
0.4293921.8612935.205069e-08
0.4313891.8607435.020929e-08
0.4333961.86024.835933e-08
0.4354121.8596634.650076e-08
0.4374371.8591314.463355e-08
0.4394721.8586064.275765e-08
0.441.8584714.227100e-08
0.4415161.8580874.157520e-08
0.443571.8575744.063281e-08
0.4456341.8570663.968605e-08
0.4477061.8565643.873487e-08
0.4497891.8560673.777928e-08
0.4518811.8555773.681924e-08
0.4539831.8550913.585473e-08
0.4560951.8546113.488574e-08
0.4582171.8541363.391224e-08
0.461.8537433.309400e-08
0.4603481.8536673.291802e-08
0.462491.8532023.183586e-08
0.4646411.8527433.074868e-08
0.4668021.8522882.965643e-08
0.4689741.8518392.855911e-08
0.4711551.8513942.745668e-08
0.4733471.8509552.634912e-08
0.4755491.850522.523641e-08
0.4777611.8500892.411852e-08
0.4799831.8496632.299544e-08
0.481.849662.298700e-08
0.4822161.8492422.220696e-08
0.4844591.8488252.141738e-08
0.4867131.8484132.062413e-08
0.4889771.8480051.982719e-08
0.4912511.8476021.902655e-08
0.4935361.8472021.822217e-08
0.4958321.8468071.741406e-08
0.4981391.8464161.660219e-08
0.51.8461051.594700e-08
0.5004561.8460291.584154e-08
0.5027841.8456461.530294e-08
0.5051231.8452671.476184e-08
0.5074721.8448921.421822e-08
0.5098331.8445211.367207e-08
0.5122041.8441541.312338e-08
0.5145871.843791.257214e-08
0.5169811.8434311.201833e-08
0.5193861.8430751.146195e-08
0.5218021.8427221.090298e-08
0.5242291.8423731.034141e-08
0.5266671.8420289.777230e-09
0.5291171.8416869.210424e-09
0.5315791.8413488.640981e-09
0.5340511.8410138.068889e-09
0.5365361.8406817.494136e-09
0.5390311.8403536.916709e-09
0.5415391.8400286.336597e-09
0.5440581.8397065.753786e-09
0.5465891.8393885.168264e-09
0.5491311.8390724.580018e-09
0.551.8389654.379000e-09
0.5516861.838764.392417e-09
0.5542521.8384514.412844e-09
0.556831.8381444.433367e-09
0.559421.8378414.453985e-09
0.5620221.8375414.474699e-09
0.5646371.8372444.495509e-09
0.5672631.8369494.516416e-09
0.5699021.8366584.537420e-09
0.5725531.8363694.558522e-09
0.5752161.8360834.579722e-09
0.5778921.83584.601021e-09
0.580581.835524.622419e-09
0.5832811.8352424.643916e-09
0.5859941.8349674.665514e-09
0.588721.8346944.687211e-09
0.5914591.8344244.709010e-09
0.594211.8341574.730910e-09
0.5969741.8338924.752912e-09
0.5997511.8336294.775017e-09
0.61.8336064.777000e-09
0.6025411.8333694.797229e-09
0.6053441.8331124.819545e-09
0.6081591.8328574.841965e-09
0.6109881.8326044.864489e-09
0.613831.8323544.887118e-09
0.6166861.8321054.909853e-09
0.6195541.831864.932693e-09
0.6224361.8316164.955639e-09
0.6253321.8313754.978692e-09
0.6282411.8311355.001852e-09
0.6311631.8308985.025120e-09
0.6340991.8306645.048496e-09
0.6370491.8304315.071981e-09
0.6400121.83025.095575e-09
0.6429891.8299725.119279e-09
0.645981.8297455.143093e-09
0.6489851.829525.167018e-09
0.651.8294455.175100e-09
0.6520041.8292985.191055e-09
0.6550371.8290775.215203e-09
0.6580841.8288585.239463e-09
0.6611451.8286425.263836e-09
0.664221.8284275.288323e-09
0.667311.8282145.312923e-09
0.6704141.8280035.337638e-09
0.6735331.8277935.362468e-09
0.6766661.8275865.387414e-09
0.6798141.827385.412475e-09
0.6829761.8271765.437653e-09
0.6861531.8269735.462948e-09
0.6893451.8267735.488361e-09
0.6925511.8265745.513892e-09
0.6957731.8263775.539542e-09
0.6990091.8261815.565311e-09
0.71.8261215.573200e-09
0.7022611.8259875.591200e-09
0.7055271.8257945.617210e-09
0.7088091.8256045.643340e-09
0.7121061.8254145.669592e-09
0.7154191.8252275.695966e-09
0.7187471.825045.722463e-09
0.722091.8248565.749083e-09
0.7254491.8246725.775827e-09
0.7288241.824495.802695e-09
0.7322141.824315.829688e-09
0.735621.8241315.856807e-09
0.7390421.8239545.884052e-09
0.742481.8237775.911423e-09
0.7459331.8236035.938922e-09
0.7494031.8234295.966549e-09
0.7528891.8232575.994305e-09
0.7563921.8230866.022189e-09
0.759911.8229176.050203e-09
0.7634451.8227496.078348e-09
0.7669961.8225826.106623e-09
0.7705641.8224166.135030e-09
0.7741481.8222516.163570e-09
0.777751.8220886.192242e-09
0.7813671.8219266.221047e-09
0.7850021.8217656.249986e-09
0.7886541.8216056.279060e-09
0.7923221.8214476.308269e-09
0.7960081.8212896.337614e-09
0.7997111.8211336.367096e-09
0.81.8211216.369400e-09
0.8034311.8209786.396714e-09
0.8071681.8208236.426471e-09
0.8109231.820676.456365e-09
0.8146951.8205186.486399e-09
0.8184841.8203676.516573e-09
0.8222921.8202176.546887e-09
0.8261171.8200686.577342e-09
0.829961.819926.607938e-09
0.833821.8197736.638677e-09
0.8376991.8196276.669559e-09
0.8415961.8194816.700585e-09
0.8455111.8193376.731755e-09
0.8494441.8191946.763070e-09
0.8533951.8190516.794530e-09
0.8573651.818916.826137e-09
0.8613531.8187696.857891e-09
0.865361.8186296.889793e-09
0.8693851.818496.921843e-09
0.8734291.8183526.954042e-09
0.8774921.8182156.986391e-09
0.8815741.8180787.018890e-09
0.8856751.8179437.051541e-09
0.8897941.8178087.084343e-09
0.8939331.8176737.117298e-09
0.8980921.817547.150407e-09
0.91.8174797.165600e-09
0.9022691.8174077.183667e-09
0.9064661.8172757.217080e-09
0.9106831.8171447.250648e-09
0.9149191.8170147.284372e-09
0.9191751.8168847.318254e-09
0.9234511.8167557.352293e-09
0.9277471.8166267.386490e-09
0.9320621.8164987.420846e-09
0.9363981.8163717.455362e-09
0.9407541.8162447.490039e-09
0.945131.8161187.524877e-09
0.9495261.8159937.559877e-09
0.9539431.8158687.595040e-09
0.958381.8157447.630367e-09
0.9628391.815627.665857e-09
0.9673171.8154977.701513e-09
0.9718171.8153747.737335e-09
0.9763381.8152527.773323e-09
0.9808791.8151317.809479e-09
0.9854421.815017.845803e-09
0.9900261.8148897.882296e-09
0.9946311.8147697.918959e-09
0.9992581.814657.955792e-09
11.8146317.961700e-09
1.003911.8145317.992800e-09
1.008581.8144128.029982e-09
1.013271.8142948.067336e-09
1.017981.8141768.104864e-09
1.022721.8140598.142567e-09
1.027471.8139428.180445e-09
1.032251.8138258.218499e-09
1.037051.8137098.256730e-09
1.041881.8135938.295139e-09
1.046731.8134788.333727e-09
1.051591.8133638.372494e-09
1.056491.8132488.411442e-09
1.06141.8131348.450571e-09
1.066341.8130198.489881e-09
1.07131.8129068.529375e-09
1.076281.8127928.569052e-09
1.081291.8126798.608914e-09
1.086321.8125668.648962e-09
1.091371.8124538.689195e-09
1.096451.8123418.729616e-09
1.101551.8122298.770225e-09
1.106671.8121178.811022e-09
1.111821.8120058.852010e-09
1.116991.8118948.893188e-09
1.122191.8117828.934558e-09
1.127411.8116718.976120e-09
1.132651.811569.017875e-09
1.137921.8114499.059825e-09
1.143211.8113399.101970e-09
1.148531.8112289.144311e-09
1.153871.8111189.186848e-09
1.159241.8110089.229584e-09
1.164631.8108989.272519e-09
1.170051.8107889.315653e-09
1.175491.8106789.358988e-09
1.180961.8105689.402524e-09
1.186461.8104589.446263e-09
1.191981.8103499.490205e-09
1.197521.8102399.534352e-09
1.21.810199.554100e-09
1.203091.810139.923674e-09
1.208691.810021.059297e-08
1.214311.8099111.126538e-08
1.219961.8098011.194092e-08
1.225631.8096921.261960e-08
1.231331.8095821.330144e-08
1.237061.8094731.398645e-08
1.242821.8093641.467465e-08
1.24861.8092541.536605e-08
1.254411.8091441.606066e-08
1.260241.8090351.675851e-08
1.26611.8089251.745960e-08
1.271991.8088151.816395e-08
1.277911.8087061.887158e-08
1.283851.8085961.958250e-08
1.289831.8084852.029673e-08
1.295831.8083752.101428e-08
1.301851.8082652.173516e-08
1.307911.8081552.245941e-08
1.313991.8080442.318702e-08
1.320111.8079332.391801e-08
1.326251.8078222.465240e-08
1.332421.8077112.539022e-08
1.338611.80762.613146e-08
1.344841.8074882.687615e-08
1.35111.8073772.762431e-08
1.357381.8072652.837594e-08
1.363691.8071532.913107e-08
1.370041.807042.988972e-08
1.376411.8069283.065189e-08
1.382811.8068153.141761e-08
1.389251.8067013.218689e-08
1.395711.8065883.295975e-08
1.41.8065133.347300e-08
1.40221.8064743.366622e-08
1.408721.806363.423887e-08
1.415281.8062463.481419e-08
1.421861.8061313.539218e-08
1.428471.8060163.597286e-08
1.435121.80593.655624e-08
1.441791.8057853.714233e-08
1.44851.8056683.773115e-08
1.455241.8055523.832271e-08
1.462011.8054353.891702e-08
1.468811.8053183.951410e-08
1.475641.80524.011395e-08
1.482511.8050824.071660e-08
1.48941.8049634.132204e-08
1.496331.8048444.193031e-08
1.503291.8047244.254140e-08
1.510281.8046044.315533e-08
1.517311.8044844.377213e-08
1.524371.8043634.439179e-08
1.531461.8042414.501433e-08
1.538581.8041194.563977e-08
1.545741.8039964.626812e-08
1.552931.8038734.689939e-08
1.560151.803754.753359e-08
1.567411.8036254.817075e-08
1.57471.8035014.881087e-08
1.582031.8033754.945397e-08
1.589391.8032495.010006e-08
1.596781.8031225.074916e-08
1.61.8030675.103200e-08
1.604211.8029955.359557e-08
1.611671.8028675.814374e-08
1.619171.8027386.271307e-08
1.62671.8026096.730365e-08
1.634261.8024797.191559e-08
1.641871.8023497.654898e-08
1.64951.8022178.120392e-08
1.657181.8020858.588052e-08
1.664891.8019529.057887e-08
1.672631.8018199.529907e-08
1.680411.8016841.000412e-07
1.688231.8015491.048055e-07
1.696081.8014131.095918e-07
1.703971.8012771.144005e-07
1.71191.8011391.192315e-07
1.719861.8010011.240850e-07
1.727861.8008621.289611e-07
1.73591.8007221.338598e-07
1.743971.8005811.387813e-07
1.752081.8004391.437258e-07
1.760231.8002961.486932e-07
1.768421.8001531.536837e-07
1.776651.8000081.586975e-07
1.784911.7998621.637345e-07
1.793221.7997161.687950e-07
1.81.7995961.729300e-07
1.801561.7995691.756137e-07
1.809941.799421.900567e-07
1.818361.7992712.045669e-07
1.826821.799122.191445e-07
1.835311.7989692.337900e-07
1.843851.7988162.485036e-07
1.852431.7986632.632856e-07
1.861041.7985082.781364e-07
1.86971.7983522.930563e-07
1.87841.7981953.080456e-07
1.887141.7980373.231046e-07
1.895911.7978783.382336e-07
1.904731.7977183.534331e-07
1.913591.7975563.687032e-07
1.92251.7973943.840444e-07
1.931441.797233.994569e-07
1.940421.7970654.149411e-07
1.949451.7968984.304974e-07
1.958521.7967314.461260e-07
1.967631.7965624.618273e-07
1.976781.7963914.776017e-07
1.985981.796224.934494e-07
1.995211.7960475.093708e-07
21.7959575.176200e-07
2.004491.7958735.387940e-07
2.013821.7956975.827197e-07
2.023191.795526.268497e-07
2.03261.7953416.711850e-07
2.042051.7951617.157266e-07
2.051551.794987.604753e-07
2.061091.7947978.054322e-07
2.070681.7946138.505982e-07
2.080311.7944278.959744e-07
2.089991.794249.415616e-07
2.099711.7940519.873608e-07
2.109481.793861.033373e-06
2.119291.7936681.079599e-06
2.129151.7934741.126041e-06
2.139061.7932791.172698e-06
2.149011.7930821.219573e-06
2.1591.7928831.266665e-06
2.169051.7926831.313977e-06
2.179141.792481.361508e-06
2.189271.7922761.409261e-06
2.199461.7920711.457236e-06
2.21.792061.459800e-06
2.209691.7918631.667627e-06
2.219971.7916541.888152e-06
2.230291.7914432.109704e-06
2.240671.791232.332286e-06
2.251091.7910152.555903e-06
2.261561.7907982.780561e-06
2.272081.7905793.006264e-06
2.282651.7903583.233016e-06
2.293271.7901363.460823e-06
2.303941.7899113.689691e-06
2.314651.7896843.919622e-06
2.325421.7894554.150623e-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
—