Optical constants

Refractive index of D-ZLAF85LN-25 (CDGM)

D-ZLAF85LN-25: 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
1.84443
Extinction coefficient k
2.34385e-08
Permittivity ε1
3.40191
Permittivity ε2
8.64611e-08
Absorption coefficient α
0.00501254 cm⁻¹
Penetration depth δ = λ/(2πk)
3.98999e+09 nm
Abbe number Vd
40.068
Chromatic dispersion dn/dλ
-0.107428 µm⁻¹
Group index ng
1.90755
Group velocity dispersion
203.924 fs²/mm
Dispersion parameter D
-1112.51 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

# D-ZLAF85LN-25 (CDGM): D-ZLAF85LN-25
mat = ls.fetch_refractiveindex("specs", "CDGM-optical", "D-ZLAF85LN-25", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mat.range_nm)  # (365, 2325) nm
eps = mat.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=1.22657126λ2λ2−93.6444885+0.367411998λ2λ2−0.0394561346+1.93493865λ2λ2−0.00982834912

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.22657126
C393.6444885
C40.367411998
C50.0394561346
C61.93493865
C70.00982834912

Comments and conditions

anneal rate:25°C/h

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 4.18e-06 1.74e-08 -3.81e-11 8.61e-07 5.26e-10 0.215
nd
1.844430
Vd
40.067973
glass code
844401
density
value: 4960
thermal expansion
value: 6.3e-06, temperature range: 243 343; value: 8.2e-06, temperature range: 293 573
dPgF
-0.0062
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 4.28e-06 K⁻¹ at 633 nm, dn/dT = 2.97e-06 K⁻¹ at 1310 nm, dn/dT = 2.86e-06 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
D-ZLAF85LN-25 (CDGM), D-ZLAF85LN-25: n and k versus wavelength
λ (µm)nk
0.3651.899829.826950e-07
0.3666981.898888.746155e-07
0.3684031.8979527.660332e-07
0.371.8970986.643900e-07
0.3701171.8970366.609409e-07
0.3718381.8961336.101625e-07
0.3735681.8952425.591479e-07
0.3753061.8943635.078960e-07
0.3770511.8934964.564057e-07
0.3788051.892644.046759e-07
0.381.8920653.694300e-07
0.3805671.8917953.620118e-07
0.3823371.8909613.388530e-07
0.3841161.8901383.155865e-07
0.3859021.8893262.922118e-07
0.3876971.8885252.687284e-07
0.38951.8877332.451357e-07
0.391.8875162.386000e-07
0.3913121.8869522.278378e-07
0.3931321.8861812.129092e-07
0.3949611.8854191.979111e-07
0.3967981.8846671.828433e-07
0.3986441.8839251.677054e-07
0.41.8833881.565800e-07
0.4004981.8831921.548742e-07
0.4023611.8824681.484910e-07
0.4042321.8817531.420781e-07
0.4061121.8810471.356353e-07
0.4080011.880351.291626e-07
0.4098991.8796611.226598e-07
0.4118061.8789811.161267e-07
0.4137211.8783091.095632e-07
0.4156451.8776451.029692e-07
0.4175791.8769899.634459e-08
0.4195211.8763418.968911e-08
0.421.8761838.804800e-08
0.4214721.8757018.624807e-08
0.4234331.8750698.385157e-08
0.4254021.8744448.144392e-08
0.4273811.8738267.902508e-08
0.4293691.8732167.659498e-08
0.4313661.8726137.415358e-08
0.4333721.8720187.170082e-08
0.4353881.8714296.923666e-08
0.4374131.8708476.676103e-08
0.4394481.8702726.427389e-08
0.441.8701176.359900e-08
0.4414921.8697036.270466e-08
0.4435451.8691426.147367e-08
0.4456091.8685866.023696e-08
0.4476811.8680375.899450e-08
0.4497641.8674955.774626e-08
0.4518561.8669585.649221e-08
0.4539571.8664285.523233e-08
0.4560691.8659045.396659e-08
0.458191.8653855.269496e-08
0.461.8649495.161000e-08
0.4603211.8648735.139762e-08
0.4624621.8643664.998224e-08
0.4646131.8638654.856028e-08
0.4667751.863374.713171e-08
0.4689461.862884.569649e-08
0.4711271.8623954.425459e-08
0.4733181.8619164.280599e-08
0.475521.8614434.135065e-08
0.4777321.8609743.988854e-08
0.4799541.8605113.841962e-08
0.481.8605013.838900e-08
0.4821861.8600523.681020e-08
0.4844291.8595993.519045e-08
0.4866821.8591513.356316e-08
0.4889461.8587073.192830e-08
0.491221.8582693.028584e-08
0.4935051.8578352.863573e-08
0.49581.8574062.697796e-08
0.4981071.8569812.531247e-08
0.51.8566372.394500e-08
0.5004231.8565612.392801e-08
0.5027511.8561462.383463e-08
0.5050891.8557352.374081e-08
0.5074391.8553282.364655e-08
0.5097991.8549252.355186e-08
0.512171.8545272.345673e-08
0.5145531.8541332.336115e-08
0.5169461.8537442.326513e-08
0.519351.8533582.316866e-08
0.5217661.8529762.307174e-08
0.5241931.8525982.297438e-08
0.5266311.8522252.287656e-08
0.5290811.8518552.277828e-08
0.5315421.8514892.267955e-08
0.5340141.8511272.258036e-08
0.5364981.8507682.248070e-08
0.5389931.8504132.238059e-08
0.54151.8500622.228000e-08
0.5440191.8497142.217895e-08
0.5465491.849372.207743e-08
0.5490921.849032.197544e-08
0.551.8489092.193900e-08
0.5516461.8486922.200463e-08
0.5542121.8483592.210696e-08
0.5567891.8480282.220976e-08
0.5593791.8477012.231304e-08
0.5619811.8473772.241680e-08
0.5645951.8470572.252105e-08
0.5672211.846742.262578e-08
0.5698591.8464252.273100e-08
0.572511.8461142.283670e-08
0.5751731.8458062.294290e-08
0.5778481.8455012.304959e-08
0.5805361.8451992.315678e-08
0.5832361.84492.326447e-08
0.5859491.8446042.337265e-08
0.5886751.8443112.348134e-08
0.5914131.844022.359054e-08
0.5941641.8437332.370024e-08
0.5969271.8434482.381046e-08
0.5997041.8431662.392119e-08
0.61.8431362.393300e-08
0.6024931.8428872.377339e-08
0.6052961.842612.359398e-08
0.6081111.8423362.341373e-08
0.610941.8420642.323265e-08
0.6137811.8417962.305073e-08
0.6166361.8415292.286796e-08
0.6195041.8412652.268434e-08
0.6223861.8410042.249986e-08
0.6252811.8407452.231453e-08
0.6281891.8404892.212833e-08
0.6311111.8402352.194127e-08
0.6340471.8399832.175334e-08
0.6369961.8397332.156454e-08
0.6399591.8394862.137485e-08
0.6429351.8392412.118429e-08
0.6459261.8389992.099283e-08
0.648931.8387582.080049e-08
0.651.8386742.073200e-08
0.6519491.838522.057627e-08
0.6549811.8382842.033392e-08
0.6580281.838052.009044e-08
0.6610881.8378181.984583e-08
0.6641631.8375891.960008e-08
0.6672521.8373611.935319e-08
0.6703561.8371351.910515e-08
0.6734741.8369121.885595e-08
0.6766071.836691.860560e-08
0.6797541.836471.835408e-08
0.6829151.8362521.810139e-08
0.6860921.8360361.784753e-08
0.6892831.8358221.759249e-08
0.6924891.835611.733626e-08
0.695711.83541.707884e-08
0.6989461.8351911.682022e-08
0.71.8351241.673600e-08
0.7021971.8349841.664831e-08
0.7054631.8347791.651795e-08
0.7087451.8345761.638700e-08
0.7120411.8343751.625543e-08
0.7153531.8341751.612325e-08
0.7186811.8339771.599045e-08
0.7220231.833781.585704e-08
0.7253821.8335851.572301e-08
0.7287561.8333921.558835e-08
0.7321461.83321.545307e-08
0.7355511.833011.531716e-08
0.7389721.8328211.518062e-08
0.7424091.8326341.504344e-08
0.7458631.8324491.490562e-08
0.7493321.8322641.476716e-08
0.7528171.8320821.462806e-08
0.7563191.8319011.448831e-08
0.7598371.8317211.434791e-08
0.7633711.8315431.420686e-08
0.7669221.8313661.406515e-08
0.7704891.831191.392279e-08
0.7740731.8310161.377976e-08
0.7776731.8308431.363606e-08
0.781291.8306711.349170e-08
0.7849241.8305011.334666e-08
0.7885751.8303321.320096e-08
0.7922431.8301641.305457e-08
0.7959281.8299981.290750e-08
0.799631.8298331.275975e-08
0.81.8298161.274500e-08
0.803351.8296691.279840e-08
0.8070861.8295061.285796e-08
0.810841.8293441.291780e-08
0.8146121.8291841.297791e-08
0.8184011.8290241.303831e-08
0.8222081.8288661.309899e-08
0.8260321.8287091.315995e-08
0.8298741.8285531.322119e-08
0.8337341.8283981.328272e-08
0.8376121.8282441.334454e-08
0.8415081.8280911.340664e-08
0.8454221.8279391.346903e-08
0.8493551.8277891.353171e-08
0.851.8277641.354200e-08
0.8533051.8276391.359462e-08
0.8572741.827491.365781e-08
0.8612621.8273421.372129e-08
0.8652681.8271961.378506e-08
0.8692921.827051.384913e-08
0.8733361.8269051.391350e-08
0.8773981.8267611.397817e-08
0.8814791.8266181.404315e-08
0.8855791.8264751.410842e-08
0.8896981.8263341.417399e-08
0.8938361.8261941.423988e-08
0.8979941.8260541.430606e-08
0.91.8259871.433800e-08
0.9021711.8259151.437260e-08
0.9063671.8257771.443949e-08
0.9105831.825641.450669e-08
0.9148181.8255031.457420e-08
0.9190731.8253681.464203e-08
0.9233481.8252331.471017e-08
0.9276431.8250991.477863e-08
0.9319581.8249651.484741e-08
0.9362931.8248331.491651e-08
0.9406481.8247011.498593e-08
0.9450231.824571.505567e-08
0.9494191.8244391.512573e-08
0.951.8244221.513500e-08
0.9538351.8243091.519605e-08
0.9582711.824181.526668e-08
0.9627291.8240511.533764e-08
0.9672071.8239241.540893e-08
0.9717051.8237961.548055e-08
0.9762251.823671.555250e-08
0.9807661.8235431.562479e-08
0.9853281.8234181.569742e-08
0.9899111.8232931.577038e-08
0.9945151.8231691.584368e-08
0.9991411.8230451.591732e-08
11.8230221.593100e-08
1.003791.8229221.599136e-08
1.008461.8227991.606575e-08
1.013151.8226771.614049e-08
1.017861.8225551.621558e-08
1.022591.8224341.629101e-08
1.027351.8223131.636680e-08
1.032131.8221931.644293e-08
1.036931.8220731.651943e-08
1.041751.8219541.659628e-08
1.04661.8218351.667348e-08
1.051471.8217161.675105e-08
1.056361.8215981.682897e-08
1.061.8215111.688700e-08
1.061271.821481.690726e-08
1.066211.8213631.698593e-08
1.071171.8212461.706496e-08
1.076151.8211291.714435e-08
1.081151.8210131.722412e-08
1.086181.8208971.730426e-08
1.091241.8207821.738477e-08
1.096311.8206671.746565e-08
1.101411.8205521.754691e-08
1.106531.8204371.762855e-08
1.111681.8203231.771057e-08
1.116851.8202091.779297e-08
1.122051.8200951.787576e-08
1.127271.8199821.795892e-08
1.132511.8198691.804248e-08
1.137781.8197561.812642e-08
1.143071.8196431.821076e-08
1.148391.819531.829549e-08
1.153731.8194181.838061e-08
1.159091.8193061.846612e-08
1.164481.8191941.855204e-08
1.16991.8190821.863835e-08
1.175341.818971.872507e-08
1.180811.8188591.881219e-08
1.18631.8187481.889971e-08
1.191821.8186361.898764e-08
1.197361.8185251.907598e-08
1.21.8184731.911800e-08
1.202931.8184141.916472e-08
1.208531.8183031.925385e-08
1.214151.8181931.934340e-08
1.21981.8180821.943336e-08
1.225471.8179711.952374e-08
1.231171.8178611.961454e-08
1.23691.817751.970577e-08
1.242651.817641.979742e-08
1.248431.8175291.988949e-08
1.254241.8174191.998199e-08
1.260071.8173082.007493e-08
1.265931.8171982.016829e-08
1.271821.8170872.026209e-08
1.277741.8169772.035633e-08
1.283681.8168662.045101e-08
1.289651.8167562.054612e-08
1.295651.8166452.064168e-08
1.301671.8165352.073768e-08
1.307731.8164242.083413e-08
1.313811.8163132.093103e-08
1.319921.8162022.102837e-08
1.326061.8160912.112617e-08
1.332231.815982.122443e-08
1.338431.8158682.132314e-08
1.344651.8157572.142231e-08
1.350911.8156452.152195e-08
1.357191.8155342.162204e-08
1.36351.8154222.172260e-08
1.369851.815312.182363e-08
1.376221.8151972.192513e-08
1.382621.8150852.202711e-08
1.389051.8149722.212955e-08
1.395511.8148592.223247e-08
1.41.8147812.230400e-08
1.4021.8147462.233588e-08
1.408521.8146322.243976e-08
1.415071.8145192.254412e-08
1.421661.8144052.264897e-08
1.428271.8142912.275431e-08
1.434911.8141762.286014e-08
1.441591.8140612.296646e-08
1.448291.8139462.307328e-08
1.455031.813832.318059e-08
1.46181.8137152.328840e-08
1.468591.8135982.339671e-08
1.475431.8134822.350553e-08
1.482291.8133652.361485e-08
1.489181.8132482.372468e-08
1.496111.813132.383503e-08
1.503071.8130122.394588e-08
1.510061.8128942.405725e-08
1.517081.8127752.416914e-08
1.524141.8126552.428155e-08
1.531231.8125352.439448e-08
1.538351.8124152.450794e-08
1.545511.8122942.462193e-08
1.55271.8121732.473644e-08
1.559921.8120522.485149e-08
1.567171.8119292.496707e-08
1.574461.8118072.508319e-08
1.581791.8116832.519985e-08
1.589141.8115592.531706e-08
1.596541.8114352.543481e-08
1.61.8113772.549000e-08
1.603961.811312.669249e-08
1.611421.8111842.895725e-08
1.618921.8110583.123255e-08
1.626451.8109323.351843e-08
1.634011.8108043.581494e-08
1.641611.8106763.812214e-08
1.649251.8105484.044006e-08
1.656921.8104184.276877e-08
1.664631.8102884.510831e-08
1.672371.8101584.745873e-08
1.680151.8100264.982008e-08
1.687961.8098945.219242e-08
1.695811.8097615.457579e-08
1.70371.8096285.697025e-08
1.711631.8094945.937584e-08
1.719591.8093596.179263e-08
1.727591.8092236.422065e-08
1.735621.8090866.665997e-08
1.743691.8089496.911064e-08
1.751811.808817.157270e-08
1.759951.8086717.404622e-08
1.768141.8085317.653124e-08
1.776361.8083917.902782e-08
1.784631.8082498.153601e-08
1.792931.8081068.405587e-08
1.81.8079858.620300e-08
1.801271.8079638.810536e-08
1.809641.8078181.006907e-07
1.818061.8076731.133345e-07
1.826521.8075271.260372e-07
1.835011.807381.387989e-07
1.843551.8072311.516201e-07
1.852121.8070821.645008e-07
1.860741.8069321.774414e-07
1.869391.806781.904423e-07
1.878091.8066282.035036e-07
1.886821.8064752.166257e-07
1.89561.806322.298088e-07
1.904421.8061652.430532e-07
1.913281.8060082.563592e-07
1.922181.805852.697272e-07
1.931121.8056912.831573e-07
1.94011.8055312.966498e-07
1.949121.805373.102052e-07
1.958191.8052073.238235e-07
1.96731.8050443.375052e-07
1.976451.8048793.512506e-07
1.985641.8047123.650599e-07
1.994881.8045453.789334e-07
21.8044523.866300e-07
2.004161.8043764.014900e-07
2.013481.8042064.348287e-07
2.022841.8040354.683224e-07
2.032251.8038625.019720e-07
2.04171.8036885.357780e-07
2.05121.8035125.697413e-07
2.060741.8033366.038626e-07
2.070331.8031576.381426e-07
2.079961.8029786.725820e-07
2.089631.8027967.071817e-07
2.099351.8026147.419422e-07
2.109121.8024297.768645e-07
2.118931.8022448.119492e-07
2.128781.8020578.471970e-07
2.138681.8018688.826088e-07
2.148631.8016779.181854e-07
2.158621.8014859.539274e-07
2.168671.8012929.898356e-07
2.178751.8010961.025911e-06
2.188891.8008991.062154e-06
2.199071.8007011.098566e-06
2.21.8006821.101900e-06
2.20931.80051.273528e-06
2.219571.8002981.463246e-06
2.22991.8000941.653847e-06
2.240271.7998891.845335e-06
2.250691.7996812.037713e-06
2.261161.7994722.230986e-06
2.271671.799262.425158e-06
2.282241.7990472.620233e-06
2.292861.7988322.816216e-06
2.303521.7986153.013110e-06
2.314241.7983963.210920e-06
2.3251.7981763.409650e-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
—