Optical constants

Refractive index of S-LAM73 (OHARA)

S-LAM73: 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
1.7936
Extinction coefficient k
2.70488e-08
Permittivity ε1
3.21699
Permittivity ε2
9.70294e-08
Absorption coefficient α
0.00578465 cm⁻¹
Penetration depth δ = λ/(2πk)
3.45743e+09 nm
Abbe number Vd
37.089
Chromatic dispersion dn/dλ
-0.108515 µm⁻¹
Group index ng
1.85736
Group velocity dispersion
211.407 fs²/mm
Dispersion parameter D
-1153.34 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-LAM73 (OHARA): S-LAM73
ohara_s_lam73 = ls.fetch_refractiveindex("specs", "OHARA-optical", "S-LAM73", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(ohara_s_lam73.range_nm)  # (365.015, 2325.42) nm
eps = ohara_s_lam73.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=1.86353123λ2λ2−0.0107620673+0.255215617λ2λ2−0.0487248679+1.23399133λ2λ2−117.12511

Valid from 0.365015 to 2.32542 µm.

Coefficients as stored
CiValue
C10.0
C21.86353123
C30.0107620673
C40.255215617
C50.0487248679
C61.23399133
C7117.12511

Comments and conditions

Recommended

Conditions

temperature
298 K

Properties

thermal dispersion
type: formula A, coefficients: -6.89e-06 7.66e-09 -9.97e-12 8.33e-07 8.98e-10 0.247
nd
1.793600
Vd
37.089450
density
value: 4450
thermal expansion
value: 8.9e-06, temperature range: 243 343
dPgF
0.0013
resistance
acid: 52.2; climatic: 3.0; phosphate: 2.2

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 298.0 K): dn/dT = -2.73e-06 K⁻¹ at 633 nm, dn/dT = -3.83e-06 K⁻¹ at 1310 nm, dn/dT = -3.90e-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-LAM73 (OHARA), S-LAM73: n and k versus wavelength
λ (µm)nk
0.3650151.851552.246525e-06
0.3667131.8505271.960746e-06
0.3684191.8495191.673638e-06
0.371.8486021.407500e-06
0.3701331.8485261.398804e-06
0.3718541.8475481.285828e-06
0.3735841.8465841.172327e-06
0.3753221.8456351.058299e-06
0.3770681.84479.437394e-07
0.3788221.8437788.286472e-07
0.381.8431697.513300e-07
0.3805841.842877.326977e-07
0.3823541.8419756.762004e-07
0.3841331.8410926.194402e-07
0.385921.8402225.624160e-07
0.3877151.8393655.051266e-07
0.3895181.8385194.475707e-07
0.391.8382964.322000e-07
0.391331.8376864.118575e-07
0.3931511.8368643.840208e-07
0.3949791.8360533.560546e-07
0.3968171.8352533.279583e-07
0.3986631.8344652.997314e-07
0.41.8339022.792800e-07
0.4005171.8336872.761288e-07
0.402381.832922.647742e-07
0.4042521.8321622.533669e-07
0.4061321.8314162.419065e-07
0.4080221.8306792.303928e-07
0.409921.8299522.188255e-07
0.4118261.8292342.072044e-07
0.4137421.8285261.955293e-07
0.4156671.8278271.837998e-07
0.41761.8271371.720158e-07
0.4195431.8264561.601770e-07
0.421.8262981.573900e-07
0.4214941.8257841.541392e-07
0.4234551.8251211.498738e-07
0.4254251.8244661.455885e-07
0.4274041.8238191.412833e-07
0.4293921.8231811.369581e-07
0.4313891.822551.326128e-07
0.4333961.8219281.282472e-07
0.4354121.8213131.238614e-07
0.4374371.8207061.194551e-07
0.4394721.8201071.150284e-07
0.441.8199531.138800e-07
0.4415161.8195151.119879e-07
0.443571.818931.094253e-07
0.4456341.8183521.068507e-07
0.4477061.8177811.042642e-07
0.4497891.8172181.016657e-07
0.4518811.8166619.905504e-08
0.4539831.8161119.643225e-08
0.4560951.8155679.379727e-08
0.4582171.815039.115004e-08
0.461.8145868.892500e-08
0.4603481.81458.851702e-08
0.462491.8139758.600827e-08
0.4646411.8134578.348785e-08
0.4668021.8129458.095571e-08
0.4689741.8124397.841178e-08
0.4711551.8119397.585603e-08
0.4733471.8114457.328838e-08
0.4755491.8109567.070880e-08
0.4777611.8104746.811721e-08
0.4799831.8099966.551356e-08
0.481.8099936.549400e-08
0.4822161.8095256.311354e-08
0.4844591.8090586.070399e-08
0.4867131.8085975.828322e-08
0.4889771.8081425.585120e-08
0.4912511.8076915.340786e-08
0.4935361.8072465.095316e-08
0.4958321.8068054.848704e-08
0.4981391.806374.600945e-08
0.51.8060234.401000e-08
0.5004561.8059394.380878e-08
0.5027841.8055144.278117e-08
0.5051231.8050934.174878e-08
0.5074721.8046764.071159e-08
0.5098331.8042643.966958e-08
0.5122041.8038573.862271e-08
0.5145871.8034553.757098e-08
0.5169811.8030563.651436e-08
0.5193861.8026623.545282e-08
0.5218021.8022733.438634e-08
0.5242291.8018873.331490e-08
0.5266671.8015063.223848e-08
0.5291171.8011293.115705e-08
0.5315791.8007563.007059e-08
0.5340511.8003872.897907e-08
0.5365361.8000222.788248e-08
0.5390311.7996612.678079e-08
0.5415391.7993042.567397e-08
0.5440581.798952.456200e-08
0.5465891.79862.344486e-08
0.5491311.7982542.232253e-08
0.551.7981372.193900e-08
0.5516861.7979122.216806e-08
0.5542521.7975732.251682e-08
0.556831.7972382.286720e-08
0.559421.7969062.321920e-08
0.5620221.7965782.357285e-08
0.5646371.7962532.392814e-08
0.5672631.7959312.428508e-08
0.5699021.7956132.464369e-08
0.5725531.7952982.500396e-08
0.5752161.7949862.536590e-08
0.5778921.7946782.572953e-08
0.580581.7943722.609486e-08
0.5832811.794072.646188e-08
0.5859941.7937712.683061e-08
0.588721.7934752.720105e-08
0.5914591.7931822.757322e-08
0.594211.7928912.794712e-08
0.5969741.7926042.832276e-08
0.5997511.7923192.870014e-08
0.61.7922942.873400e-08
0.6025411.7920382.885570e-08
0.6053441.7917592.898995e-08
0.6081591.7914832.912483e-08
0.6109881.791212.926034e-08
0.613831.7909392.939648e-08
0.6166861.7906712.953325e-08
0.6195541.7904062.967066e-08
0.6224361.7901432.980870e-08
0.6253321.7898822.994739e-08
0.6282411.7896253.008673e-08
0.6311631.789373.022671e-08
0.6340991.7891173.036734e-08
0.6370491.7888663.050863e-08
0.6400121.7886193.065057e-08
0.6429891.7883733.079318e-08
0.645981.788133.093645e-08
0.6489851.7878893.108038e-08
0.651.7878083.112900e-08
0.6520041.787653.077620e-08
0.6550371.7874143.024223e-08
0.6580841.787182.970577e-08
0.6611451.7869482.916682e-08
0.664221.7867182.862536e-08
0.667311.786492.808138e-08
0.6704141.7862652.753487e-08
0.6735331.7860412.698581e-08
0.6766661.785822.643421e-08
0.6798141.78562.588003e-08
0.6829761.7853832.532328e-08
0.6861531.7851682.476394e-08
0.6893451.7849542.420200e-08
0.6925511.7847432.363744e-08
0.6957731.7845332.307026e-08
0.6990091.7843252.250044e-08
0.71.7842622.232600e-08
0.7022611.7841192.210940e-08
0.7055271.7839152.179642e-08
0.7088091.7837132.148198e-08
0.7121061.7835132.116608e-08
0.7154191.7833142.084871e-08
0.7187471.7831172.052986e-08
0.722091.7829222.020953e-08
0.7254491.7827281.988771e-08
0.7288241.7825371.956440e-08
0.7322141.7823461.923957e-08
0.735621.7821581.891324e-08
0.7390421.7819711.858539e-08
0.742481.7817861.825602e-08
0.7459331.7816021.792511e-08
0.7494031.781421.759267e-08
0.7528891.7812391.725867e-08
0.7563921.781061.692313e-08
0.759911.7808821.658602e-08
0.7634451.7807061.624735e-08
0.7669961.7805311.590710e-08
0.7705641.7803581.556526e-08
0.7741481.7801861.522184e-08
0.777751.7800161.487682e-08
0.7813671.7798471.453019e-08
0.7850021.7796791.418196e-08
0.7886541.7795121.383210e-08
0.7923221.7793471.348061e-08
0.7960081.7791841.312749e-08
0.7997111.7790211.277273e-08
0.81.7790081.274500e-08
0.8034311.778861.279965e-08
0.8071681.77871.285918e-08
0.8109231.7785411.291900e-08
0.8146951.7783841.297909e-08
0.8184841.7782271.303946e-08
0.8222921.7780721.310011e-08
0.8261171.7779181.316104e-08
0.829961.7777661.322226e-08
0.833821.7776141.328376e-08
0.8376991.7774641.334554e-08
0.8415961.7773141.340762e-08
0.8455111.7771661.346998e-08
0.8494441.7770191.353264e-08
0.8533951.7768731.359558e-08
0.8573651.7767271.365882e-08
0.8613531.7765831.372235e-08
0.865361.776441.378618e-08
0.8693851.7762981.385030e-08
0.8734291.7761571.391472e-08
0.8774921.7760171.397945e-08
0.8815741.7758781.404447e-08
0.8856751.775741.410980e-08
0.8897941.7756031.417543e-08
0.8939331.7754661.424136e-08
0.8980921.7753311.430760e-08
0.91.7752691.433800e-08
0.9022691.7751971.437415e-08
0.9064661.7750631.444101e-08
0.9106831.774931.450818e-08
0.9149191.7747981.457566e-08
0.9191751.7746671.464346e-08
0.9234511.7745371.471157e-08
0.9277471.7744081.478000e-08
0.9320621.7742791.484875e-08
0.9363981.7741511.491782e-08
0.9407541.7740241.498720e-08
0.945131.7738981.505692e-08
0.9495261.7737721.512695e-08
0.9539431.7736471.519731e-08
0.958381.7735231.526800e-08
0.9628391.77341.533902e-08
0.9673171.7732771.541037e-08
0.9718171.7731551.548204e-08
0.9763381.7730341.555406e-08
0.9808791.7729131.562641e-08
0.9854421.7727931.569909e-08
0.9900261.7726741.577211e-08
0.9946311.7725551.584547e-08
0.9992581.7724371.591918e-08
11.7724181.593100e-08
1.003911.772321.599324e-08
1.008581.7722031.606766e-08
1.013271.7720861.614242e-08
1.017981.7719711.621753e-08
1.022721.7718551.629298e-08
1.027471.7717411.636879e-08
1.032251.7716271.644495e-08
1.037051.7715131.652147e-08
1.041881.77141.659834e-08
1.046731.7712871.667557e-08
1.051591.7711751.675316e-08
1.056491.7710641.683111e-08
1.06141.7709531.690942e-08
1.066341.7708421.698809e-08
1.07131.7707321.706713e-08
1.076281.7706221.714654e-08
1.081291.7705131.722632e-08
1.086321.7704041.730647e-08
1.091371.7702951.738700e-08
1.096451.7701871.746789e-08
1.101551.770081.754917e-08
1.106671.7699721.763082e-08
1.111821.7698651.771285e-08
1.116991.7697591.779526e-08
1.122191.7696531.787806e-08
1.127411.7695471.796124e-08
1.132651.7694411.804481e-08
1.137921.7693361.812877e-08
1.143211.7692311.821311e-08
1.148531.7691261.829786e-08
1.153871.7690221.838299e-08
1.159241.7689181.846852e-08
1.164631.7688141.855445e-08
1.170051.7687111.864078e-08
1.175491.7686071.872751e-08
1.180961.7685041.881464e-08
1.186461.7684011.890218e-08
1.191981.7682991.899012e-08
1.197521.7681961.907848e-08
1.21.7681511.911800e-08
1.203091.7680941.933980e-08
1.208691.7679921.974148e-08
1.214311.767892.014503e-08
1.219961.7677892.055046e-08
1.225631.7676872.095777e-08
1.231331.7675862.136698e-08
1.237061.7674852.177809e-08
1.242821.7673842.219111e-08
1.24861.7672832.260606e-08
1.254411.7671822.302293e-08
1.260241.7670812.344175e-08
1.26611.766982.386251e-08
1.271991.766882.428523e-08
1.277911.7667792.470991e-08
1.283851.7666792.513657e-08
1.289831.7665792.556522e-08
1.295831.7664782.599586e-08
1.301851.7663782.642850e-08
1.307911.7662782.686316e-08
1.313991.7661782.729984e-08
1.320111.7660782.773854e-08
1.326251.7659772.817929e-08
1.332421.7658772.862209e-08
1.338611.7657772.906695e-08
1.344841.7656772.951388e-08
1.35111.7655772.996289e-08
1.357381.7654763.041398e-08
1.363691.7653763.086718e-08
1.370041.7652753.132248e-08
1.376411.7651753.177990e-08
1.382811.7650743.223945e-08
1.389251.7649743.270114e-08
1.395711.7648733.316497e-08
1.41.7648063.347300e-08
1.40221.7647723.380696e-08
1.408721.7646713.479673e-08
1.415281.764573.579111e-08
1.421861.7644683.679011e-08
1.428471.7643673.779375e-08
1.435121.7642653.880207e-08
1.441791.7641643.981508e-08
1.44851.7640624.083279e-08
1.455241.763964.185525e-08
1.462011.7638574.288246e-08
1.468811.7637554.391444e-08
1.475641.7636524.495123e-08
1.482511.7635494.599284e-08
1.48941.7634464.703930e-08
1.496331.7633424.809062e-08
1.503291.7632384.914683e-08
1.510281.7631345.020796e-08
1.517311.763035.127402e-08
1.524371.7629265.234505e-08
1.531461.7628215.342105e-08
1.538581.7627165.450206e-08
1.545741.762615.558810e-08
1.552931.7625045.667919e-08
1.560151.7623985.777535e-08
1.567411.7622925.887661e-08
1.57471.7621855.998300e-08
1.582031.7620786.109453e-08
1.589391.761976.221124e-08
1.596781.7618626.333314e-08
1.61.7618156.382200e-08
1.604211.7617546.733867e-08
1.611671.7616457.357779e-08
1.619171.7615367.984593e-08
1.62671.7614268.614323e-08
1.634261.7613169.246982e-08
1.641871.7612059.882584e-08
1.64951.7610941.052114e-07
1.657181.7609831.116267e-07
1.664891.7608711.180718e-07
1.672631.7607581.245470e-07
1.680411.7606451.310522e-07
1.688231.7605321.375877e-07
1.696081.7604181.441536e-07
1.703971.7603031.507500e-07
1.71191.7601881.573771e-07
1.719861.7600731.640351e-07
1.727861.7599561.707240e-07
1.73591.7598391.774440e-07
1.743971.7597221.841953e-07
1.752081.7596041.909780e-07
1.760231.7594851.977923e-07
1.768421.7593662.046382e-07
1.776651.7592462.115160e-07
1.784911.7591262.184258e-07
1.793221.7590042.253677e-07
1.81.7589052.310400e-07
1.801561.7588822.337844e-07
1.809941.758762.485543e-07
1.818361.7586362.633928e-07
1.826821.7585122.783003e-07
1.835311.7583882.932772e-07
1.843851.7582623.083237e-07
1.852431.7581363.234403e-07
1.861041.7580093.386271e-07
1.86971.7578813.538846e-07
1.87841.7577523.692131e-07
1.887141.7576233.846129e-07
1.895911.7574934.000843e-07
1.904731.7573624.156277e-07
1.913591.757234.312434e-07
1.92251.7570974.469317e-07
1.931441.7569634.626930e-07
1.940421.7568294.785276e-07
1.949451.7566934.944359e-07
1.958521.7565575.104182e-07
1.967631.756425.264748e-07
1.976781.7562825.426061e-07
1.985981.7561425.588124e-07
1.995211.7560025.750942e-07
21.755935.835300e-07
2.004491.7558616.010900e-07
2.013821.7557196.375185e-07
2.023191.7555766.741165e-07
2.03261.7554327.108848e-07
2.042051.7552877.478240e-07
2.051551.755147.849351e-07
2.061091.7549938.222188e-07
2.070681.7548448.596760e-07
2.080311.7546958.973074e-07
2.089991.7545449.351138e-07
2.099711.7543929.730961e-07
2.109481.7542391.011255e-06
2.119291.7540851.049592e-06
2.129151.753931.088106e-06
2.139061.7537731.126800e-06
2.149011.7536161.165674e-06
2.1591.7534571.204729e-06
2.169051.7532961.243966e-06
2.179141.7531351.283385e-06
2.189271.7529721.322987e-06
2.199461.7528081.362773e-06
2.21.7527991.364900e-06
2.209691.7526421.505204e-06
2.219971.7524761.654082e-06
2.230291.7523071.803652e-06
2.240671.7521381.953918e-06
2.251091.7519672.104883e-06
2.261561.7517952.256550e-06
2.272081.7516212.408922e-06
2.282651.7514452.562004e-06
2.293271.7512692.715797e-06
2.303941.751092.870306e-06
2.314651.7509113.025534e-06
2.325421.7507293.181483e-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
—