Optical constants

Refractive index of H-LAF7 (CDGM)

H-LAF7: n,k 0.365–2.325 µm

Data
formula 2 + tabulated k
Range
0.365–2.325 µm
Temperature
293 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
1.78179
Extinction coefficient k
2.34385e-08
Permittivity ε1
3.17476
Permittivity ε2
8.35247e-08
Absorption coefficient α
0.00501254 cm⁻¹
Penetration depth δ = λ/(2πk)
3.98999e+09 nm
Abbe number Vd
37.092
Chromatic dispersion dn/dλ
-0.106975 µm⁻¹
Group index ng
1.84464
Group velocity dispersion
206.901 fs²/mm
Dispersion parameter D
-1128.75 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

# H-LAF7 (CDGM): H-LAF7
cdgm_h_laf7 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-LAF7", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_laf7.range_nm)  # (365, 2325) nm
eps = cdgm_h_laf7.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=1.85620526λ2λ2−0.0109606128+1.38494652λ2λ2−114.47738+0.223526441λ2λ2−0.0505771615

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.85620526
C30.0109606128
C41.38494652
C5114.47738
C60.223526441
C70.0505771615

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -1.02e-06 1.7e-08 -1.39e-10 6.63e-07 4.31e-10 0.279
nd
1.781790
Vd
37.092107
glass code
782371
density
value: 3770
thermal expansion
value: 8e-06, temperature range: 243 343; value: 9.5e-06, temperature range: 293 573
dPgF
-0.0009
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 6.28e-07 K⁻¹ at 633 nm, dn/dT = -3.64e-07 K⁻¹ at 1310 nm, dn/dT = -4.33e-07 K⁻¹ at 1550 nm

References

Cite

CDGM Zemax catalog 2022-06 (obtained from http://www.cdgmgd.com); See also CDGM optical 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 425 wavelengths, the same grid as the API and the library
H-LAF7 (CDGM), H-LAF7: n and k versus wavelength
λ (µm)nk
0.3651.8388342.404650e-06
0.3666981.8378242.100535e-06
0.3684031.8368291.795005e-06
0.371.8359161.509000e-06
0.3701171.8358491.500413e-06
0.3718381.8348851.373997e-06
0.3735681.8339351.246994e-06
0.3753061.8329991.119399e-06
0.3770511.8320779.912110e-07
0.3788051.8311688.624267e-07
0.381.8305597.746800e-07
0.3805671.8302737.564790e-07
0.3823371.8293916.996574e-07
0.3841161.8285216.425715e-07
0.3859021.8276645.852201e-07
0.3876971.826825.276020e-07
0.38951.8259874.697158e-07
0.391.8257594.536800e-07
0.3913121.8251664.317096e-07
0.3931321.8243574.012334e-07
0.3949611.8235583.706156e-07
0.3967981.8227713.398553e-07
0.3986441.8219953.089519e-07
0.41.8214332.862400e-07
0.4004981.8212292.827718e-07
0.4023611.8204742.697934e-07
0.4042321.8197292.567545e-07
0.4061121.8189942.436551e-07
0.4080011.8182692.304946e-07
0.4098991.8175542.172730e-07
0.4118061.8168482.039899e-07
0.4137211.8161511.906450e-07
0.4156451.8154641.772380e-07
0.4175791.8147851.637687e-07
0.4195211.8141151.502367e-07
0.421.8139521.469000e-07
0.4214721.8134541.431408e-07
0.4234331.8128021.381357e-07
0.4254021.8121581.331073e-07
0.4273811.8115221.280555e-07
0.4293691.8108941.229802e-07
0.4313661.8102741.178814e-07
0.4333721.8096621.127587e-07
0.4353881.8090581.076123e-07
0.4374131.8084611.024419e-07
0.4394481.8078719.724752e-08
0.441.8077139.583800e-08
0.4414921.8072899.337086e-08
0.4435451.8067148.997505e-08
0.4456091.8061468.656345e-08
0.4476811.8055858.313597e-08
0.4497641.8050317.969255e-08
0.4518561.8044837.623312e-08
0.4539571.8039437.275760e-08
0.4560691.8034086.926590e-08
0.458191.802886.575797e-08
0.461.8024376.276500e-08
0.4603211.8023596.249752e-08
0.4624621.8018436.071495e-08
0.4646131.8013345.892408e-08
0.4667751.800835.712488e-08
0.4689461.8003335.531731e-08
0.4711271.7998415.350133e-08
0.4733181.7993555.167691e-08
0.475521.7988754.984400e-08
0.4777321.7984014.800257e-08
0.4799541.7979314.615257e-08
0.481.7979224.611400e-08
0.4821861.7974684.500543e-08
0.4844291.7970094.386810e-08
0.4866821.7965564.272549e-08
0.4889461.7961084.157755e-08
0.491221.7956654.042428e-08
0.4935051.7952273.926565e-08
0.49581.7947933.810162e-08
0.4981071.7943653.693218e-08
0.51.7940193.597200e-08
0.5004231.7939423.585317e-08
0.5027511.7935233.519990e-08
0.5050891.7931093.454359e-08
0.5074391.7926993.388422e-08
0.5097991.7922953.322179e-08
0.512171.7918943.255628e-08
0.5145531.7914983.188767e-08
0.5169461.7911063.121595e-08
0.519351.7907193.054111e-08
0.5217661.7903352.986312e-08
0.5241931.7899562.918199e-08
0.5266311.7895812.849769e-08
0.5290811.789212.781020e-08
0.5315421.7888432.711951e-08
0.5340141.788482.642562e-08
0.5364981.788122.572849e-08
0.5389931.7877652.502813e-08
0.54151.7874132.432450e-08
0.5440191.7870652.361760e-08
0.5465491.7867212.290742e-08
0.5490921.786382.219393e-08
0.551.786262.193900e-08
0.5516461.7860432.200463e-08
0.5542121.7857092.210696e-08
0.5567891.7853792.220976e-08
0.5593791.7850522.231304e-08
0.5619811.7847292.241680e-08
0.5645951.7844092.252105e-08
0.5672211.7840922.262578e-08
0.5698591.7837792.273100e-08
0.572511.7834682.283670e-08
0.5751731.7831612.294290e-08
0.5778481.7828572.304959e-08
0.5805361.7825562.315678e-08
0.5832361.7822582.326447e-08
0.5859491.7819632.337265e-08
0.5886751.7816712.348134e-08
0.5914131.7813822.359054e-08
0.5941641.7810962.370024e-08
0.5969271.7808132.381046e-08
0.5997041.7805322.392119e-08
0.61.7805022.393300e-08
0.6024931.7802542.377339e-08
0.6052961.7799792.359398e-08
0.6081111.7797072.341373e-08
0.610941.7794372.323265e-08
0.6137811.779172.305073e-08
0.6166361.7789052.286796e-08
0.6195041.7786432.268434e-08
0.6223861.7783842.249986e-08
0.6252811.7781272.231453e-08
0.6281891.7778722.212833e-08
0.6311111.777622.194127e-08
0.6340471.7773712.175334e-08
0.6369961.7771232.156454e-08
0.6399591.7768782.137485e-08
0.6429351.7766362.118429e-08
0.6459261.7763952.099283e-08
0.648931.7761572.080049e-08
0.651.7760732.073200e-08
0.6519491.7759212.079412e-08
0.6549811.7756872.089079e-08
0.6580281.7754562.098792e-08
0.6610881.7752262.108549e-08
0.6641631.7749992.118352e-08
0.6672521.7747732.128201e-08
0.6703561.774552.138095e-08
0.6734741.7743292.148035e-08
0.6766071.774112.158022e-08
0.6797541.7738922.168055e-08
0.6829151.7736772.178135e-08
0.6860921.7734642.188261e-08
0.6892831.7732522.198435e-08
0.6924891.7730422.208656e-08
0.695711.7728352.218924e-08
0.6989461.7726292.229241e-08
0.71.7725622.232600e-08
0.7021971.7724242.211548e-08
0.7054631.7722222.180255e-08
0.7087451.7720212.148816e-08
0.7120411.7718222.117232e-08
0.7153531.7716252.085500e-08
0.7186811.771432.053621e-08
0.7220231.7712362.021593e-08
0.7253821.7710441.989417e-08
0.7287561.7708531.957090e-08
0.7321461.7706641.924614e-08
0.7355511.7704771.891986e-08
0.7389721.7702911.859207e-08
0.7424091.7701061.826275e-08
0.7458631.7699241.793190e-08
0.7493321.7697421.759951e-08
0.7528171.7695621.726557e-08
0.7563191.7693841.693009e-08
0.7598371.7692071.659304e-08
0.7633711.7690321.625442e-08
0.7669221.7688571.591423e-08
0.7704891.7686851.557245e-08
0.7740731.7685131.522909e-08
0.7776731.7683431.488413e-08
0.781291.7681741.453756e-08
0.7849241.7680071.418939e-08
0.7885751.7678411.383959e-08
0.7922431.7676761.348817e-08
0.7959281.7675121.313511e-08
0.799631.767351.278041e-08
0.81.7673341.274500e-08
0.803351.7671891.279840e-08
0.8070861.7670291.285796e-08
0.810841.766871.291780e-08
0.8146121.7667121.297791e-08
0.8184011.7665561.303831e-08
0.8222081.7664011.309899e-08
0.8260321.7662461.315995e-08
0.8298741.7660931.322119e-08
0.8337341.7659411.328272e-08
0.8376121.765791.334454e-08
0.8415081.7656411.340664e-08
0.8454221.7654921.346903e-08
0.8493551.7653441.353171e-08
0.851.765321.354200e-08
0.8533051.7651971.359462e-08
0.8572741.7650511.365781e-08
0.8612621.7649061.372129e-08
0.8652681.7647631.378506e-08
0.8692921.764621.384913e-08
0.8733361.7644781.391350e-08
0.8773981.7643371.397817e-08
0.8814791.7641961.404315e-08
0.8855791.7640571.410842e-08
0.8896981.7639191.417399e-08
0.8938361.7637811.423988e-08
0.8979941.7636451.430606e-08
0.91.7635791.433800e-08
0.9021711.7635091.437260e-08
0.9063671.7633741.443949e-08
0.9105831.7632391.450669e-08
0.9148181.7631061.457420e-08
0.9190731.7629731.464203e-08
0.9233481.7628421.471017e-08
0.9276431.762711.477863e-08
0.9319581.762581.484741e-08
0.9362931.7624511.491651e-08
0.9406481.7623221.498593e-08
0.9450231.7621931.505567e-08
0.9494191.7620661.512573e-08
0.951.7620491.513500e-08
0.9538351.7619391.519605e-08
0.9582711.7618131.526668e-08
0.9627291.7616871.533764e-08
0.9672071.7615631.540893e-08
0.9717051.7614381.548055e-08
0.9762251.7613151.555250e-08
0.9807661.7611921.562479e-08
0.9853281.7610691.569742e-08
0.9899111.7609471.577038e-08
0.9945151.7608261.584368e-08
0.9991411.7607051.591732e-08
11.7606831.593100e-08
1.003791.7605851.599136e-08
1.008461.7604661.606575e-08
1.013151.7603471.614049e-08
1.017861.7602281.621558e-08
1.022591.760111.629101e-08
1.027351.7599921.636680e-08
1.032131.7598751.644293e-08
1.036931.7597591.651943e-08
1.041751.7596421.659628e-08
1.04661.7595271.667348e-08
1.051471.7594111.675105e-08
1.056361.7592961.682897e-08
1.061.7592121.688700e-08
1.061271.7591821.690726e-08
1.066211.7590681.698593e-08
1.071171.7589541.706496e-08
1.076151.7588411.714435e-08
1.081151.7587281.722412e-08
1.086181.7586151.730426e-08
1.091241.7585031.738477e-08
1.096311.7583911.746565e-08
1.101411.758281.754691e-08
1.106531.7581681.762855e-08
1.111681.7580571.771057e-08
1.116851.7579471.779297e-08
1.122051.7578361.787576e-08
1.127271.7577261.795892e-08
1.132511.7576161.804248e-08
1.137781.7575071.812642e-08
1.143071.7573971.821076e-08
1.148391.7572881.829549e-08
1.153731.7571791.838061e-08
1.159091.7570711.846612e-08
1.164481.7569621.855204e-08
1.16991.7568541.863835e-08
1.175341.7567461.872507e-08
1.180811.7566381.881219e-08
1.18631.756531.889971e-08
1.191821.7564221.898764e-08
1.197361.7563151.907598e-08
1.21.7562641.911800e-08
1.202931.7562071.932849e-08
1.208531.75611.973009e-08
1.214151.7559932.013356e-08
1.21981.7558862.053890e-08
1.225471.7557792.094613e-08
1.231171.7556722.135525e-08
1.23691.7555652.176628e-08
1.242651.7554582.217921e-08
1.248431.7553512.259407e-08
1.254241.7552452.301086e-08
1.260071.7551382.342958e-08
1.265931.7550312.385026e-08
1.271821.7549252.427289e-08
1.277741.7548182.469748e-08
1.283681.7547112.512405e-08
1.289651.7546052.555261e-08
1.295651.7544982.598316e-08
1.301671.7543912.641571e-08
1.307731.7542842.685027e-08
1.313811.7541782.728686e-08
1.319921.7540712.772547e-08
1.326061.7539642.816613e-08
1.332231.7538562.860883e-08
1.338431.7537492.905360e-08
1.344651.7536422.950043e-08
1.350911.7535342.994934e-08
1.357191.7534273.040034e-08
1.36351.7533193.085344e-08
1.369851.7532113.130864e-08
1.376221.7531033.176596e-08
1.382621.7529953.222541e-08
1.389051.7528863.268700e-08
1.395511.7527783.315073e-08
1.41.7527023.347300e-08
1.4021.7526693.377664e-08
1.408521.752563.476620e-08
1.415071.7524513.576035e-08
1.421661.7523413.675913e-08
1.428271.7522313.776256e-08
1.434911.7521213.877066e-08
1.441591.7520113.978344e-08
1.448291.75194.080093e-08
1.455031.751794.182316e-08
1.46181.7516784.285014e-08
1.468591.7515674.388190e-08
1.475431.7514554.491846e-08
1.482291.7513434.595984e-08
1.489181.7512314.700606e-08
1.496111.7511184.805715e-08
1.503071.7510054.911313e-08
1.510061.7508915.017402e-08
1.517081.7507775.123984e-08
1.524141.7506635.231063e-08
1.531231.7505485.338639e-08
1.538351.7504335.446716e-08
1.545511.7503175.555295e-08
1.55271.7502015.664379e-08
1.559921.7500855.773971e-08
1.567171.7499685.884073e-08
1.574461.7498515.994686e-08
1.581791.7497336.105814e-08
1.589141.7496146.217459e-08
1.596541.7494956.329624e-08
1.61.749446.382200e-08
1.603961.7493766.655778e-08
1.611421.7492567.171034e-08
1.618921.7491357.688686e-08
1.626451.7490148.208746e-08
1.634011.7488938.731225e-08
1.641611.7487719.256135e-08
1.649251.7486489.783485e-08
1.656921.7485241.031329e-07
1.664631.74841.084556e-07
1.672371.7482761.138030e-07
1.680151.748151.191753e-07
1.687961.7480251.245726e-07
1.695811.7478981.299950e-07
1.70371.7477711.354426e-07
1.711631.7476431.409156e-07
1.719591.7475141.464140e-07
1.727591.7473851.519380e-07
1.735621.7472551.574877e-07
1.743691.7471241.630632e-07
1.751811.7469921.686646e-07
1.759951.746861.742921e-07
1.768141.7467271.799458e-07
1.776361.7465931.856258e-07
1.784631.7464581.913321e-07
1.792931.7463221.970651e-07
1.81.7462072.019500e-07
1.801271.7461862.037409e-07
1.809641.7460492.155886e-07
1.818061.7459112.274914e-07
1.826521.7457722.394496e-07
1.835011.7456322.514635e-07
1.843551.7454912.635332e-07
1.852121.7453492.756590e-07
1.860741.7452072.878413e-07
1.869391.7450633.000802e-07
1.878091.7449193.123760e-07
1.886821.7447733.247291e-07
1.89561.7446263.371395e-07
1.904421.7444793.496078e-07
1.913281.744333.621340e-07
1.922181.7441813.747184e-07
1.931121.744033.873614e-07
1.94011.7438794.000633e-07
1.949121.7437264.128242e-07
1.958191.7435724.256444e-07
1.96731.7434174.385243e-07
1.976451.7432614.514641e-07
1.985641.7431034.644640e-07
1.994881.7429454.775245e-07
21.7428574.847700e-07
2.004161.7427855.010938e-07
2.013481.7426255.377166e-07
2.022841.7424635.745098e-07
2.032251.7422996.114741e-07
2.04171.7421356.486103e-07
2.05121.7419696.859193e-07
2.060741.7418027.234018e-07
2.070331.7416347.610587e-07
2.079961.7414647.988907e-07
2.089631.7412938.368987e-07
2.099351.741128.750834e-07
2.109121.7409479.134458e-07
2.118931.7407719.519866e-07
2.128781.7405959.907067e-07
2.138681.7404171.029607e-06
2.148631.7402371.068688e-06
2.158621.7400561.107951e-06
2.168671.7398741.147396e-06
2.178751.739691.187025e-06
2.188891.7395051.226839e-06
2.199071.7393181.266837e-06
2.21.73931.270500e-06
2.20931.7391291.396320e-06
2.219571.7389391.535403e-06
2.22991.7387471.675133e-06
2.240271.7385541.815512e-06
2.250691.7383581.956545e-06
2.261161.7381622.098233e-06
2.271671.7379632.240581e-06
2.282241.7377632.383591e-06
2.292861.7375612.527266e-06
2.303521.7373572.671609e-06
2.314241.7371522.816623e-06
2.3251.7369442.962313e-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
—