Optical constants

Refractive index of D-ZLAF85L-25 (CDGM)

D-ZLAF85L-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
1.8526
Extinction coefficient k
4.80922e-08
Permittivity ε1
3.43211
Permittivity ε2
1.78191e-07
Absorption coefficient α
0.010285 cm⁻¹
Penetration depth δ = λ/(2πk)
1.94459e+09 nm
Abbe number Vd
40.534
Chromatic dispersion dn/dλ
-0.107331 µm⁻¹
Group index ng
1.91566
Group velocity dispersion
203.031 fs²/mm
Dispersion parameter D
-1107.64 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-ZLAF85L-25 (CDGM): D-ZLAF85L-25
mat = ls.fetch_refractiveindex("specs", "CDGM-optical", "D-ZLAF85L-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=1.71754157λ2λ2−0.0081252668+0.614249641λ2λ2−0.0323072933+1.49329677λ2λ2−115.416839

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.71754157
C30.0081252668
C40.614249641
C50.0323072933
C61.49329677
C7115.416839

Comments and conditions

anneal rate:25°C/h

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 4.58e-06 1.63e-08 -3.37e-11 8.32e-07 7.24e-10 0.214
nd
1.852600
Vd
40.534071
glass code
853405
density
value: 5280
thermal expansion
value: 6.3e-06, temperature range: 243 343; value: 7.7e-06, temperature range: 293 573
dPgF
-0.0081
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 4.53e-06 K⁻¹ at 633 nm, dn/dT = 3.24e-06 K⁻¹ at 1310 nm, dn/dT = 3.14e-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-ZLAF85L-25 (CDGM), D-ZLAF85L-25: n and k versus wavelength
λ (µm)nk
0.3651.9074231.008825e-06
0.3666981.9065049.019441e-07
0.3684031.9055987.945660e-07
0.371.9047636.940500e-07
0.3701171.9047036.909399e-07
0.3718381.9038196.451522e-07
0.3735681.9029475.991516e-07
0.3753061.9020865.529369e-07
0.3770511.9012365.065073e-07
0.3788051.9003974.598618e-07
0.381.8998334.280800e-07
0.3805671.8995684.205972e-07
0.3823371.898753.972366e-07
0.3841161.8979423.737674e-07
0.3859021.8971443.501890e-07
0.3876971.8963573.265009e-07
0.38951.8955793.027027e-07
0.391.8953652.961100e-07
0.3913121.894812.862217e-07
0.3931321.8940512.725053e-07
0.3949611.8933022.587251e-07
0.3967981.8925612.448807e-07
0.3986441.891832.309720e-07
0.41.89132.207500e-07
0.4004981.8911072.190858e-07
0.4023611.8903942.128583e-07
0.4042321.8896892.066019e-07
0.4061121.8889922.003163e-07
0.4080011.8883041.940015e-07
0.4098991.8876241.876573e-07
0.4118061.8869521.812837e-07
0.4137211.8862881.748803e-07
0.4156451.8856321.684472e-07
0.4175791.8849841.619842e-07
0.4195211.8843431.554911e-07
0.421.8841871.538900e-07
0.4214721.883711.517447e-07
0.4234331.8830841.488884e-07
0.4254021.8824661.460188e-07
0.4273811.8818551.431359e-07
0.4293691.8812511.402395e-07
0.4313661.8806541.373297e-07
0.4333721.8800631.344063e-07
0.4353881.879481.314694e-07
0.4374131.8789031.285187e-07
0.4394481.8783331.255544e-07
0.441.878181.247500e-07
0.4414921.8777691.231991e-07
0.4435451.8772121.210645e-07
0.4456091.8766611.189199e-07
0.4476811.8761161.167654e-07
0.4497641.8755781.146008e-07
0.4518561.8750451.124262e-07
0.4539571.8745191.102414e-07
0.4560691.8739981.080465e-07
0.458191.8734831.058414e-07
0.461.873051.039600e-07
0.4603211.8729741.036550e-07
0.4624621.8724711.016222e-07
0.4646131.8719739.957999e-08
0.4667751.871489.752827e-08
0.4689461.8709939.546701e-08
0.4711271.8705129.339616e-08
0.4733181.8700359.131568e-08
0.475521.8695648.922552e-08
0.4777321.8690988.712563e-08
0.4799541.8686378.501598e-08
0.481.8686278.497200e-08
0.4821861.8681818.314114e-08
0.4844291.867738.126279e-08
0.4866821.8672847.937571e-08
0.4889461.8668427.747984e-08
0.491221.8664057.557516e-08
0.4935051.8659737.366162e-08
0.49581.8655467.173917e-08
0.4981071.8651236.980779e-08
0.51.864786.822200e-08
0.5004231.8647046.805425e-08
0.5027511.864296.713199e-08
0.5050891.8638816.620545e-08
0.5074391.8634766.527459e-08
0.5097991.8630746.433941e-08
0.512171.8626786.339987e-08
0.5145531.8622856.245597e-08
0.5169461.8618966.150768e-08
0.519351.8615126.055497e-08
0.5217661.8611315.959783e-08
0.5241931.8607545.863624e-08
0.5266311.8603825.767018e-08
0.5290811.8600135.669963e-08
0.5315421.8596485.572456e-08
0.5340141.8592865.474495e-08
0.5364981.8589285.376079e-08
0.5389931.8585745.277205e-08
0.54151.8582245.177872e-08
0.5440191.8578775.078076e-08
0.5465491.8575334.977816e-08
0.5490921.8571934.877089e-08
0.551.8570734.841100e-08
0.5516461.8568574.839704e-08
0.5542121.8565244.837529e-08
0.5567891.8561944.835343e-08
0.5593791.8558674.833146e-08
0.5619811.8555444.830940e-08
0.5645951.8552244.828723e-08
0.5672211.8549074.826496e-08
0.5698591.8545934.824259e-08
0.572511.8542824.822011e-08
0.5751731.8539754.819753e-08
0.5778481.853674.817485e-08
0.5805361.8533684.815205e-08
0.5832361.853074.812916e-08
0.5859491.8527744.810615e-08
0.5886751.8524814.808304e-08
0.5914131.8521914.805982e-08
0.5941641.8519034.803649e-08
0.5969271.8516194.801306e-08
0.5997041.8513374.798951e-08
0.61.8513074.798700e-08
0.6024931.8510584.792602e-08
0.6052961.8507814.785747e-08
0.6081111.8505074.778860e-08
0.610941.8502364.771942e-08
0.6137811.8499674.764991e-08
0.6166361.8497014.758008e-08
0.6195041.8494384.750993e-08
0.6223861.8491764.743944e-08
0.6252811.8489174.736863e-08
0.6281891.8486614.729749e-08
0.6311111.8484074.722602e-08
0.6340471.8481554.715422e-08
0.6369961.8479064.708209e-08
0.6399591.8476594.700961e-08
0.6429351.8474144.693680e-08
0.6459261.8471724.686366e-08
0.648931.8469314.679017e-08
0.651.8468464.676400e-08
0.6519491.8466934.646650e-08
0.6549811.8464574.600351e-08
0.6580281.8462234.553836e-08
0.6610881.8459914.507105e-08
0.6641631.8457624.460157e-08
0.6672521.8455344.412991e-08
0.6703561.8453084.365605e-08
0.6734741.8450854.317998e-08
0.6766071.8448634.270170e-08
0.6797541.8446434.222120e-08
0.6829151.8444254.173846e-08
0.6860921.8442094.125348e-08
0.6892831.8439954.076624e-08
0.6924891.8437834.027674e-08
0.695711.8435733.978496e-08
0.6989461.8433643.929089e-08
0.71.8432973.913000e-08
0.7021971.8431573.911203e-08
0.7054631.8429523.908531e-08
0.7087451.8427493.905847e-08
0.7120411.8425483.903150e-08
0.7153531.8423483.900441e-08
0.7186811.8421493.897719e-08
0.7220231.8419533.894985e-08
0.7253821.8417583.892238e-08
0.7287561.8415653.889478e-08
0.7321461.8413733.886705e-08
0.7355511.8411833.883919e-08
0.7389721.8409943.881121e-08
0.7424091.8408073.878309e-08
0.7458631.8406223.875484e-08
0.7493321.8404373.872646e-08
0.7528171.8402553.869795e-08
0.7563191.8400743.866931e-08
0.7598371.8398943.864054e-08
0.7633711.8397163.861162e-08
0.7669221.8395393.858258e-08
0.7704891.8393633.855340e-08
0.7740731.8391893.852408e-08
0.7776731.8390163.849463e-08
0.781291.8388453.846504e-08
0.7849241.8386743.843532e-08
0.7885751.8385053.840545e-08
0.7922431.8383383.837545e-08
0.7959281.8381713.834531e-08
0.799631.8380063.831502e-08
0.81.837993.831200e-08
0.803351.8378423.665252e-08
0.8070861.8376793.480138e-08
0.810841.8375183.294164e-08
0.8146121.8373573.107324e-08
0.8184011.8371982.919616e-08
0.8222081.837042.731034e-08
0.8260321.8368832.541575e-08
0.8298741.8367272.351235e-08
0.8337341.8365722.160010e-08
0.8376121.8364191.967895e-08
0.8415081.8362661.774887e-08
0.8454221.8361141.580981e-08
0.8493551.8359641.386173e-08
0.851.8359391.354200e-08
0.8533051.8358141.359462e-08
0.8572741.8356651.365781e-08
0.8612621.8355181.372129e-08
0.8652681.8353711.378506e-08
0.8692921.8352251.384913e-08
0.8733361.8350811.391350e-08
0.8773981.8349371.397817e-08
0.8814791.8347941.404315e-08
0.8855791.8346521.410842e-08
0.8896981.8345111.417399e-08
0.8938361.834371.423988e-08
0.8979941.8342311.430606e-08
0.91.8341641.433800e-08
0.9021711.8340921.437260e-08
0.9063671.8339551.443949e-08
0.9105831.8338181.450669e-08
0.9148181.8336811.457420e-08
0.9190731.8335461.464203e-08
0.9233481.8334111.471017e-08
0.9276431.8332781.477863e-08
0.9319581.8331451.484741e-08
0.9362931.8330121.491651e-08
0.9406481.8328811.498593e-08
0.9450231.832751.505567e-08
0.9494191.8326191.512573e-08
0.951.8326021.513500e-08
0.9538351.832491.519605e-08
0.9582711.8323611.526668e-08
0.9627291.8322331.533764e-08
0.9672071.8321051.540893e-08
0.9717051.8319781.548055e-08
0.9762251.8318521.555250e-08
0.9807661.8317261.562479e-08
0.9853281.8316011.569742e-08
0.9899111.8314771.577038e-08
0.9945151.8313531.584368e-08
0.9991411.8312291.591732e-08
11.8312061.593100e-08
1.003791.8311061.599136e-08
1.008461.8309841.606575e-08
1.013151.8308621.614049e-08
1.017861.8307411.621558e-08
1.022591.830621.629101e-08
1.027351.83051.636680e-08
1.032131.830381.644293e-08
1.036931.8302611.651943e-08
1.041751.8301421.659628e-08
1.04661.8300241.667348e-08
1.051471.8299061.675105e-08
1.056361.8297881.682897e-08
1.061.8297011.688700e-08
1.061271.8296711.690726e-08
1.066211.8295541.698593e-08
1.071171.8294381.706496e-08
1.076151.8293221.714435e-08
1.081151.8292061.722412e-08
1.086181.8290911.730426e-08
1.091241.8289761.738477e-08
1.096311.8288621.746565e-08
1.101411.8287471.754691e-08
1.106531.8286331.762855e-08
1.111681.828521.771057e-08
1.116851.8284061.779297e-08
1.122051.8282931.787576e-08
1.127271.8281811.795892e-08
1.132511.8280681.804248e-08
1.137781.8279561.812642e-08
1.143071.8278441.821076e-08
1.148391.8277321.829549e-08
1.153731.827621.838061e-08
1.159091.8275091.846612e-08
1.164481.8273981.855204e-08
1.16991.8272871.863835e-08
1.175341.8271761.872507e-08
1.180811.8270661.881219e-08
1.18631.8269551.889971e-08
1.191821.8268451.898764e-08
1.197361.8267351.907598e-08
1.21.8266821.911800e-08
1.202931.8266241.916472e-08
1.208531.8265141.925385e-08
1.214151.8264051.934340e-08
1.21981.8262951.943336e-08
1.225471.8261851.952374e-08
1.231171.8260761.961454e-08
1.23691.8259661.970577e-08
1.242651.8258571.979742e-08
1.248431.8257471.988949e-08
1.254241.8256381.998199e-08
1.260071.8255282.007493e-08
1.265931.8254192.016829e-08
1.271821.825312.026209e-08
1.277741.82522.035633e-08
1.283681.8250912.045101e-08
1.289651.8249822.054612e-08
1.295651.8248722.064168e-08
1.301671.8247632.073768e-08
1.307731.8246532.083413e-08
1.313811.8245432.093103e-08
1.319921.8244342.102837e-08
1.326061.8243242.112617e-08
1.332231.8242142.122443e-08
1.338431.8241042.132314e-08
1.344651.8239942.142231e-08
1.350911.8238842.152195e-08
1.357191.8237732.162204e-08
1.36351.8236632.172260e-08
1.369851.8235522.182363e-08
1.376221.8234412.192513e-08
1.382621.823332.202711e-08
1.389051.8232192.212955e-08
1.395511.8231072.223247e-08
1.41.823032.230400e-08
1.4021.8229962.233588e-08
1.408521.8228842.243976e-08
1.415071.8227722.254412e-08
1.421661.8226592.264897e-08
1.428271.8225472.275431e-08
1.434911.8224342.286014e-08
1.441591.822322.296646e-08
1.448291.8222072.307328e-08
1.455031.8220932.318059e-08
1.46181.8219792.328840e-08
1.468591.8218652.339671e-08
1.475431.821752.350553e-08
1.482291.8216352.361485e-08
1.489181.8215192.372468e-08
1.496111.8214042.383503e-08
1.503071.8212872.394588e-08
1.510061.8211712.405725e-08
1.517081.8210542.416914e-08
1.524141.8209372.428155e-08
1.531231.8208192.439448e-08
1.538351.8207012.450794e-08
1.545511.8205822.462193e-08
1.55271.8204632.473644e-08
1.559921.8203432.485149e-08
1.567171.8202232.496707e-08
1.574461.8201032.508319e-08
1.581791.8199812.519985e-08
1.589141.819862.531706e-08
1.596541.8197382.543481e-08
1.61.8196812.549000e-08
1.603961.8196152.583752e-08
1.611421.8194922.649203e-08
1.618921.8193682.714959e-08
1.626451.8192442.781021e-08
1.634011.8191192.847390e-08
1.641611.8189942.914068e-08
1.649251.8188672.981055e-08
1.656921.8187413.048355e-08
1.664631.8186133.115967e-08
1.672371.8184853.183894e-08
1.680151.8183573.252137e-08
1.687961.8182273.320697e-08
1.695811.8180973.389577e-08
1.70371.8179673.458776e-08
1.711631.8178353.528298e-08
1.719591.8177033.598143e-08
1.727591.817573.668312e-08
1.735621.8174373.738808e-08
1.743691.8173023.809632e-08
1.751811.8171673.880786e-08
1.759951.8170313.952270e-08
1.768141.8168944.024087e-08
1.776361.8167574.096238e-08
1.784631.8166184.168724e-08
1.792931.8164794.241548e-08
1.81.816364.303600e-08
1.801271.8163394.449148e-08
1.809641.8161985.412039e-08
1.818061.8160566.379409e-08
1.826521.8159147.351278e-08
1.835011.815778.327668e-08
1.843551.8156259.308600e-08
1.852121.815481.029409e-07
1.860741.8153331.128417e-07
1.869391.8151861.227885e-07
1.878091.8150371.327816e-07
1.886821.8148881.428212e-07
1.89561.8147371.529075e-07
1.904421.8145861.630407e-07
1.913281.8144331.732210e-07
1.922181.814281.834487e-07
1.931121.8141251.937239e-07
1.94011.8139692.040470e-07
1.949121.8138122.144180e-07
1.958191.8136542.248373e-07
1.96731.8134952.353051e-07
1.976451.8133342.458215e-07
1.985641.8131732.563869e-07
1.994881.813012.670014e-07
21.812922.728900e-07
2.004161.8128462.854942e-07
2.013481.8126813.137720e-07
2.022841.8125153.421813e-07
2.032251.8123473.707227e-07
2.04171.8121783.993969e-07
2.05121.8120084.282045e-07
2.060741.8118364.571461e-07
2.070331.8116634.862223e-07
2.079961.8114895.154337e-07
2.089631.8113135.447810e-07
2.099351.8111365.742648e-07
2.109121.8109576.038858e-07
2.118931.8107776.336445e-07
2.128781.8105966.635417e-07
2.138681.8104136.935779e-07
2.148631.8102297.237538e-07
2.158621.8100437.540700e-07
2.168671.8098567.845273e-07
2.178751.8096678.151263e-07
2.188891.8094768.458676e-07
2.199071.8092848.767518e-07
2.21.8092668.795800e-07
2.20931.809091.020294e-06
2.219571.8088951.175840e-06
2.22991.8086981.332110e-06
2.240271.8084991.489106e-06
2.250691.8082991.646833e-06
2.261161.8080971.805294e-06
2.271671.8078931.964491e-06
2.282241.8076872.124429e-06
2.292861.807482.285111e-06
2.303521.807272.446540e-06
2.314241.8070592.608720e-06
2.3251.8068462.771655e-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
—