Optical constants

Refractive index of S-LAM54 (OHARA)

S-LAM54: n,k 0.34–2.4 µm

Data
formula 2 + tabulated k
Range
0.34–2.4 µm
Temperature
298 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.34–2.4 µm
Refractive index n
1.75699
Extinction coefficient k
1.40486e-08
Permittivity ε1
3.08703
Permittivity ε2
4.93668e-08
Absorption coefficient α
0.00300443 cm⁻¹
Penetration depth δ = λ/(2πk)
6.65683e+09 nm
Abbe number Vd
47.823
Chromatic dispersion dn/dλ
-0.081277 µm⁻¹
Group index ng
1.80475
Group velocity dispersion
147.096 fs²/mm
Dispersion parameter D
-802.488 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-LAM54 (OHARA): S-LAM54
ohara_s_lam54 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-LAM54", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_lam54.range_nm)  # (340, 2400) nm
eps = ohara_s_lam54.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=1.84213306λ2λ2−0.0094399322+0.175468631λ2λ2−0.0395281122+1.25750878λ2λ2−86.5463013

Valid from 0.34 to 2.4 µm.

Coefficients as stored
CiValue
C10.0
C21.84213306
C30.0094399322
C40.175468631
C50.0395281122
C61.25750878
C786.5463013

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: 4.27e-06 1.66e-08 -3.72e-11 4.44e-07 5.21e-10 0.257
nd
1.756998
Vd
47.823170
glass code
757478
density
value: 4080
thermal expansion
value: 5.7e-06, temperature range: 243 343; value: 6.9e-06, temperature range: 293 573
dPgF
-0.0076
resistance
acid: 51.0; climatic: 1.0; phosphate: 2.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = 3.31e-06 K⁻¹ at 633 nm, dn/dT = 2.63e-06 K⁻¹ at 1310 nm, dn/dT = 2.57e-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 424 wavelengths, the same grid as the API and the library
S-LAM54 (OHARA), S-LAM54: n and k versus wavelength
λ (µm)nk
0.341.8085638.105400e-06
0.3416691.8077077.267786e-06
0.3433471.8068636.426060e-06
0.3450331.806035.580200e-06
0.3467271.805214.730188e-06
0.3484291.8044023.876002e-06
0.351.8036693.087900e-06
0.350141.8036043.061935e-06
0.3518591.8028182.743234e-06
0.3535871.8020432.422970e-06
0.3553231.8012792.101132e-06
0.3570681.8005251.777715e-06
0.3588211.7997811.452709e-06
0.361.7992891.234100e-06
0.3605831.7990481.196247e-06
0.3623531.7983251.081205e-06
0.3641321.7976119.655985e-07
0.365921.7969078.494243e-07
0.3677171.7962127.326797e-07
0.3695221.7955276.153620e-07
0.371.7953485.843100e-07
0.3713361.7948515.447788e-07
0.373161.7941834.908491e-07
0.3749921.7935254.366545e-07
0.3768331.7928743.821938e-07
0.3786831.7922333.274658e-07
0.381.7917832.885200e-07
0.3805431.79162.823908e-07
0.3824111.7909752.612867e-07
0.3842891.7903572.400789e-07
0.3861761.7897482.187671e-07
0.3880721.7891471.973506e-07
0.3899771.7885531.758289e-07
0.391.7885461.755700e-07
0.3918921.7879671.650589e-07
0.3938161.7873881.543682e-07
0.395751.7868161.436250e-07
0.3976931.7862521.328291e-07
0.3996451.7856941.219801e-07
0.41.7855941.200100e-07
0.4016081.7851431.160652e-07
0.403581.78461.112267e-07
0.4055611.7840621.063645e-07
0.4075521.7835321.014784e-07
0.4095531.7830089.656827e-08
0.4115641.782499.163405e-08
0.4135851.7819788.667561e-08
0.4156161.7814738.169282e-08
0.4176561.7809747.668556e-08
0.4197071.7804817.165372e-08
0.421.7804117.093500e-08
0.4217681.7799936.934253e-08
0.4238391.7795126.747710e-08
0.425921.7790366.560251e-08
0.4280111.7785656.371871e-08
0.4301121.7781016.182567e-08
0.4322241.7776415.992333e-08
0.4343471.7771875.801165e-08
0.4364791.7767395.609058e-08
0.4386221.7762955.416009e-08
0.441.7760145.291900e-08
0.4407761.7758575.229331e-08
0.442941.7754245.054800e-08
0.4451151.7749964.879412e-08
0.44731.7745724.703163e-08
0.4494971.7741544.526048e-08
0.4517041.773744.348064e-08
0.4539211.7733314.169206e-08
0.456151.7729273.989470e-08
0.458391.7725273.808851e-08
0.461.7722443.679000e-08
0.4606411.7721323.647109e-08
0.4629021.7717413.534497e-08
0.4651751.7713543.421333e-08
0.4674591.7709723.307613e-08
0.4697541.7705943.193335e-08
0.4720611.770223.078496e-08
0.4743791.7698512.963093e-08
0.4767081.7694852.847123e-08
0.4790481.7691232.730584e-08
0.481.7689782.683200e-08
0.48141.7687662.634969e-08
0.4837641.7684122.553565e-08
0.4861391.7680622.471761e-08
0.4885261.7677162.389555e-08
0.4909251.7673742.306946e-08
0.4933351.7670352.223931e-08
0.4957581.76672.140509e-08
0.4981921.7663692.056677e-08
0.51.7661261.994400e-08
0.5006381.7660411.985733e-08
0.5030961.7657171.952332e-08
0.5055661.7653961.918768e-08
0.5080481.7650781.885038e-08
0.5105431.7647641.851143e-08
0.513051.7644531.817081e-08
0.5155691.7641451.782852e-08
0.51811.7638411.748455e-08
0.5206441.763541.713890e-08
0.52321.7632421.679154e-08
0.5257691.7629471.644248e-08
0.5283511.7626551.609170e-08
0.5309451.7623661.573921e-08
0.5335521.762081.538498e-08
0.5361721.7617971.502901e-08
0.5388041.7615161.467130e-08
0.541451.7612391.431183e-08
0.5441081.7609651.395059e-08
0.546781.7606931.358758e-08
0.5494641.7604241.322279e-08
0.551.760371.315000e-08
0.5521621.7601571.320168e-08
0.5548731.7598941.326647e-08
0.5575981.7596331.333158e-08
0.5603351.7593741.339702e-08
0.5630871.7591181.346277e-08
0.5658511.7588651.352885e-08
0.568631.7586141.359525e-08
0.5714221.7583661.366198e-08
0.5742271.758121.372903e-08
0.5770471.7578761.379642e-08
0.579881.7576351.386413e-08
0.5827271.7573961.393218e-08
0.5855881.7571591.400056e-08
0.5884641.7569251.406928e-08
0.5913531.7566931.413833e-08
0.5942561.7564631.420773e-08
0.5971741.7562351.427746e-08
0.61.7560171.434500e-08
0.6001061.7560091.433652e-08
0.6030531.7557861.410139e-08
0.6060141.7555641.386510e-08
0.6089891.7553451.362766e-08
0.6119791.7551281.338905e-08
0.6149841.7549131.314927e-08
0.6180041.7546991.290831e-08
0.6210381.7544881.266616e-08
0.6240871.7542791.242283e-08
0.6271521.7540711.217831e-08
0.6302311.7538651.193258e-08
0.6333251.7536621.168565e-08
0.6364351.753461.143750e-08
0.639561.7532591.118814e-08
0.64271.7530611.093755e-08
0.6458561.7528651.068573e-08
0.6490271.752671.043267e-08
0.651.752611.035500e-08
0.6522131.7524761.039028e-08
0.6554161.7522851.044133e-08
0.6586341.7520951.049262e-08
0.6618681.7519071.054417e-08
0.6651171.751721.059597e-08
0.6683831.7515351.064803e-08
0.6716651.7513521.070034e-08
0.6749631.751171.075290e-08
0.6782771.750991.080573e-08
0.6816071.7508111.085882e-08
0.6849541.7506341.091216e-08
0.6883171.7504581.096577e-08
0.6916961.7502831.101964e-08
0.6950931.750111.107378e-08
0.6985051.7499391.112818e-08
0.71.7498641.115200e-08
0.7019351.7497681.105945e-08
0.7053821.74961.089462e-08
0.7088451.7494321.072898e-08
0.7123251.7492661.056253e-08
0.7158231.7491011.039526e-08
0.7193371.7489371.022717e-08
0.7228691.7487751.005825e-08
0.7264191.7486149.888503e-09
0.7299851.7484549.717923e-09
0.7335691.7482959.546506e-09
0.7371711.7481389.374246e-09
0.7407911.7479829.201141e-09
0.7444281.7478279.027186e-09
0.7480831.7476738.852377e-09
0.7517561.747528.676709e-09
0.7554471.7473688.500179e-09
0.7591561.7472178.322782e-09
0.7628841.7470688.144515e-09
0.766631.7469197.965371e-09
0.7703941.7467727.785349e-09
0.7741761.7466257.604442e-09
0.7779781.746487.422647e-09
0.7817971.7463367.239960e-09
0.7856361.7461927.056376e-09
0.7894931.746056.871890e-09
0.793371.7459086.686498e-09
0.7972651.7457676.500196e-09
0.81.745676.369400e-09
0.801181.7456286.463406e-09
0.8051131.7454896.776871e-09
0.8090671.7453517.091875e-09
0.8130391.7452147.408426e-09
0.8170311.7450777.726532e-09
0.8210431.7449428.046199e-09
0.8250741.7448078.367436e-09
0.8291251.7446748.690250e-09
0.8331961.7445419.014649e-09
0.8372871.7444089.340641e-09
0.8413981.7442779.668233e-09
0.8455291.7441469.997434e-09
0.8496811.7440161.032825e-08
0.8538531.7438871.066069e-08
0.8580451.7437591.099477e-08
0.8622581.7436311.133048e-08
0.8664921.7435041.166784e-08
0.8707461.7433771.200686e-08
0.8750211.7432511.234755e-08
0.8793181.7431261.268990e-08
0.8836351.7430011.303394e-08
0.8879741.7428771.337967e-08
0.8923341.7427541.372709e-08
0.8967151.7426311.407622e-08
0.91.742541.433800e-08
0.9011181.7425091.444497e-08
0.9055421.7423871.486844e-08
0.9099881.7422661.529398e-08
0.9144561.7421461.572161e-08
0.9189461.7420261.615134e-08
0.9234581.7419061.658319e-08
0.9279921.7417871.701715e-08
0.9325491.7416681.745324e-08
0.9371281.741551.789148e-08
0.9417291.7414331.833186e-08
0.9463531.7413151.877441e-08
0.9509991.7411991.921913e-08
0.9556691.7410821.966604e-08
0.9603611.7409662.011513e-08
0.9650761.7408512.056644e-08
0.9698151.7407352.101996e-08
0.9745761.7406212.147571e-08
0.9793621.7405062.193369e-08
0.984171.7403922.239392e-08
0.9890021.7402782.285642e-08
0.9938581.7401652.332118e-08
0.9987381.7400522.378823e-08
11.7400232.390900e-08
1.003641.7399392.399608e-08
1.008571.7398262.411390e-08
1.013521.7397142.423231e-08
1.01851.7396022.435129e-08
1.02351.739492.447086e-08
1.028521.7393792.459101e-08
1.033571.7392672.471176e-08
1.038651.7391562.483310e-08
1.043751.7390452.495503e-08
1.048871.7389352.507757e-08
1.054021.7388242.520070e-08
1.05921.7387142.532444e-08
1.06441.7386042.544879e-08
1.069631.7384942.557374e-08
1.074881.7383842.569931e-08
1.080151.7382742.582550e-08
1.085461.7381642.595231e-08
1.090791.7380552.607974e-08
1.096141.7379452.620779e-08
1.101531.7378362.633648e-08
1.106931.7377272.646579e-08
1.112371.7376172.659574e-08
1.117831.7375082.672633e-08
1.123321.7373992.685756e-08
1.128831.737292.698944e-08
1.134381.7371812.712196e-08
1.139951.7370722.725513e-08
1.145541.7369622.738896e-08
1.151171.7368532.752344e-08
1.156821.7367442.765859e-08
1.16251.7366352.779439e-08
1.168211.7365252.793087e-08
1.173941.7364162.806801e-08
1.179711.7363062.820583e-08
1.18551.7361972.834432e-08
1.191321.7360872.848350e-08
1.197171.7359772.862335e-08
1.21.7359242.869100e-08
1.203051.7358672.978904e-08
1.208961.7357573.191639e-08
1.214891.7356473.405418e-08
1.220861.7355373.620247e-08
1.226851.7354263.836131e-08
1.232871.7353154.053074e-08
1.238931.7352044.271083e-08
1.245011.7350934.490162e-08
1.251121.7349824.710317e-08
1.257271.734874.931553e-08
1.263441.7347585.153875e-08
1.269641.7346465.377288e-08
1.275881.7345345.601799e-08
1.282141.7344215.827412e-08
1.288441.7343086.054133e-08
1.294761.7341956.281966e-08
1.301121.7340816.510919e-08
1.307511.7339676.740996e-08
1.313931.7338536.972202e-08
1.320381.7337387.204544e-08
1.326861.7336237.438026e-08
1.333381.7335087.672655e-08
1.339931.7333927.908435e-08
1.34651.7332768.145374e-08
1.353121.733168.383476e-08
1.359761.7330438.622746e-08
1.366441.7329258.863192e-08
1.373141.7328079.104818e-08
1.379891.7326899.347631e-08
1.386661.732579.591636e-08
1.393471.7324519.836839e-08
1.41.7323371.007200e-07
1.400311.7323311.007425e-07
1.407191.7322111.012372e-07
1.41411.732091.017343e-07
1.421041.7319691.022338e-07
1.428021.7318471.027358e-07
1.435031.7317241.032403e-07
1.442071.7316011.037473e-07
1.449161.7314771.042567e-07
1.456271.7313531.047687e-07
1.463421.7312281.052831e-07
1.470611.7311021.058001e-07
1.477831.7309761.063196e-07
1.485081.7308491.068417e-07
1.492371.7307221.073663e-07
1.49971.7305941.078936e-07
1.507071.7304651.084234e-07
1.514471.7303351.089558e-07
1.52191.7302041.094908e-07
1.529371.7300731.100284e-07
1.536881.7299411.105687e-07
1.544431.7298091.111116e-07
1.552011.7296751.116572e-07
1.559631.7295411.122055e-07
1.567291.7294061.127565e-07
1.574991.729271.133102e-07
1.582721.7291331.138666e-07
1.590491.7289951.144257e-07
1.59831.7288571.149876e-07
1.61.7288271.151100e-07
1.606151.7287171.200164e-07
1.614031.7285771.263119e-07
1.621961.7284361.326383e-07
1.629921.7282931.389958e-07
1.637921.728151.453844e-07
1.645971.7280061.518045e-07
1.654051.7278611.582560e-07
1.662171.7277141.647392e-07
1.670331.7275671.712543e-07
1.678531.7274191.778014e-07
1.686771.727271.843806e-07
1.695051.7271191.909921e-07
1.703381.7269681.976360e-07
1.711741.7268152.043126e-07
1.720151.7266612.110220e-07
1.728591.7265062.177643e-07
1.737081.726352.245397e-07
1.745611.7261932.313484e-07
1.754181.7260342.381905e-07
1.762791.7258752.450662e-07
1.771451.7257142.519757e-07
1.780141.7255522.589191e-07
1.788881.7253882.658966e-07
1.797671.7252232.729083e-07
1.81.7251792.747700e-07
1.806491.7250572.901851e-07
1.815361.724893.112385e-07
1.824281.7247213.323952e-07
1.833231.7245513.536558e-07
1.842241.7243793.750208e-07
1.851281.7242063.964908e-07
1.860371.7240324.180661e-07
1.869511.7238564.397474e-07
1.878681.7236784.615351e-07
1.887911.7234994.834298e-07
1.897181.7233195.054320e-07
1.906491.7231375.275422e-07
1.915851.7229535.497610e-07
1.925261.7227685.720889e-07
1.934711.7225815.945264e-07
1.944211.7223936.170740e-07
1.953761.7222036.397324e-07
1.963351.7220116.625021e-07
1.972991.7218186.853835e-07
1.982681.7216227.083773e-07
1.992411.7214257.314839e-07
21.7212717.494900e-07
2.00221.7212277.680368e-07
2.012031.7210268.510379e-07
2.021911.7208249.344465e-07
2.031831.7206191.018265e-06
2.041811.7204131.102494e-06
2.051841.7202051.187137e-06
2.061911.7199951.272196e-06
2.072031.7197831.357673e-06
2.082211.7195691.443569e-06
2.092431.7193531.529887e-06
2.10271.7191351.616629e-06
2.113031.7189151.703796e-06
2.12341.7186931.791392e-06
2.133831.7184681.879417e-06
2.144311.7182421.967875e-06
2.154831.7180132.056768e-06
2.165411.7177822.146096e-06
2.176051.7175492.235863e-06
2.186731.7173142.326072e-06
2.197471.7170762.416722e-06
2.21.7170192.438100e-06
2.208261.7168362.714384e-06
2.21911.7165933.077156e-06
2.231.7163483.441709e-06
2.240941.7161013.808052e-06
2.251951.7158514.176194e-06
2.2631.7155984.546143e-06
2.274121.7153444.917909e-06
2.285281.7150865.291500e-06
2.29651.7148265.666926e-06
2.307781.7145636.044194e-06
2.319111.7142986.423316e-06
2.33051.7140296.804298e-06
2.341941.7137587.187151e-06
2.353441.7134857.571885e-06
2.364991.7132087.958507e-06
2.37661.7129288.347027e-06
2.388271.7126468.737455e-06
2.41.7123619.129800e-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
—