Optical constants

Refractive index of D-ZLAF85LS (CDGM)

D-ZLAF85LS: 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
1.8545
Extinction coefficient k
1.98319e-08
Permittivity ε1
3.43915
Permittivity ε2
7.35563e-08
Absorption coefficient α
0.00424123 cm⁻¹
Penetration depth δ = λ/(2πk)
4.71561e+09 nm
Abbe number Vd
40.594
Chromatic dispersion dn/dλ
-0.107412 µm⁻¹
Group index ng
1.91761
Group velocity dispersion
203.188 fs²/mm
Dispersion parameter D
-1108.5 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-ZLAF85LS (CDGM): D-ZLAF85LS
cdgm_d_zlaf85ls = ls.fetch_refractiveindex("specs", "CDGM-optical", "D-ZLAF85LS", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_d_zlaf85ls.range_nm)  # (365, 2325) nm
eps = cdgm_d_zlaf85ls.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=0.638690484λ2λ2−0.0319257637+1.69998504λ2λ2−0.00791790668+1.45547394λ2λ2−112.179157

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C20.638690484
C30.0319257637
C41.69998504
C50.00791790668
C61.45547394
C7112.179157

Comments and conditions

anneal rate:4°C/h

Conditions

temperature
293 K

Properties

nd
1.854500
Vd
40.593546
glass code
855406
density
value: 5290
thermal expansion
value: 8.1e-06, temperature range: 293 573
dPgF
-0.008

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-ZLAF85LS (CDGM), D-ZLAF85LS: n and k versus wavelength
λ (µm)nk
0.3651.909369.269000e-07
0.3666981.9084418.315212e-07
0.3684031.9075347.356988e-07
0.371.9066996.460000e-07
0.3701171.9066386.429663e-07
0.3718381.9057545.983027e-07
0.3735681.9048825.534315e-07
0.3753061.904025.083515e-07
0.3770511.903174.630618e-07
0.3788051.902334.175615e-07
0.381.9017663.865600e-07
0.3805671.9015013.789326e-07
0.3823371.9006823.551206e-07
0.3841161.8998743.311979e-07
0.3859021.8990763.071639e-07
0.3876971.8982882.830181e-07
0.38951.8975092.587600e-07
0.391.8972962.520400e-07
0.3913121.896742.430387e-07
0.3931321.8959812.305527e-07
0.3949611.8952312.180086e-07
0.3967981.894492.054061e-07
0.3986441.8937581.927450e-07
0.41.8932281.834400e-07
0.4004981.8930351.817517e-07
0.4023611.8923211.754339e-07
0.4042321.8916161.690866e-07
0.4061121.8909191.627099e-07
0.4080011.890231.563034e-07
0.4098991.889551.498672e-07
0.4118061.8888771.434011e-07
0.4137211.8882131.369049e-07
0.4156451.8875571.303784e-07
0.4175791.8869081.238216e-07
0.4195211.8862671.172343e-07
0.421.886111.156100e-07
0.4214721.8856331.138896e-07
0.4234331.8850071.115989e-07
0.4254021.8843881.092976e-07
0.4273811.8837771.069857e-07
0.4293691.8831721.046629e-07
0.4313661.8825751.023293e-07
0.4333721.8819849.998494e-08
0.4353881.88149.762962e-08
0.4374131.8808239.526336e-08
0.4394481.8802529.288608e-08
0.441.8800999.224100e-08
0.4414921.8796889.004219e-08
0.4435451.8791318.701570e-08
0.4456091.8785798.397514e-08
0.4476811.8780348.092044e-08
0.4497641.8774957.785152e-08
0.4518561.8769627.476833e-08
0.4539571.8764357.167081e-08
0.4560691.8759146.855887e-08
0.458191.8753996.543246e-08
0.461.8749666.276500e-08
0.4603211.874896.255966e-08
0.4624621.8743866.119117e-08
0.4646131.8738875.981632e-08
0.4667751.8733955.843507e-08
0.4689461.8729075.704740e-08
0.4711271.8724255.565327e-08
0.4733181.8719485.425266e-08
0.475521.8714775.284553e-08
0.4777321.871015.143186e-08
0.4799541.8705495.001161e-08
0.481.8705394.998200e-08
0.4821861.8700934.845064e-08
0.4844291.8696414.687955e-08
0.4866821.8691954.530116e-08
0.4889461.8687534.371542e-08
0.491221.8683164.212231e-08
0.4935051.8678834.052179e-08
0.49581.8674563.891383e-08
0.4981071.8670323.729838e-08
0.51.866693.597200e-08
0.5004231.8666143.585317e-08
0.5027511.8661993.519990e-08
0.5050891.8657893.454359e-08
0.5074391.8653843.388422e-08
0.5097991.8649823.322179e-08
0.512171.8645853.255628e-08
0.5145531.8641923.188767e-08
0.5169461.8638033.121595e-08
0.519351.8634183.054111e-08
0.5217661.8630382.986312e-08
0.5241931.8626612.918199e-08
0.5266311.8622882.849769e-08
0.5290811.8619182.781020e-08
0.5315421.8615532.711951e-08
0.5340141.8611912.642562e-08
0.5364981.8608332.572849e-08
0.5389931.8604792.502813e-08
0.54151.8601282.432450e-08
0.5440191.8597812.361760e-08
0.5465491.8594372.290742e-08
0.5490921.8590972.219393e-08
0.551.8589772.193900e-08
0.5516461.858762.184678e-08
0.5542121.8584272.170298e-08
0.5567891.8580972.155852e-08
0.5593791.857772.141339e-08
0.5619811.8574462.126758e-08
0.5645951.8571262.112109e-08
0.5672211.8568092.097393e-08
0.5698591.8564952.082607e-08
0.572511.8561842.067754e-08
0.5751731.8558762.052830e-08
0.5778481.8555712.037838e-08
0.5805361.8552692.022776e-08
0.5832361.854972.007643e-08
0.5859491.8546741.992441e-08
0.5886751.8543811.977167e-08
0.5914131.854091.961823e-08
0.5941641.8538031.946407e-08
0.5969271.8535181.930920e-08
0.5997041.8532361.915360e-08
0.61.8532061.913700e-08
0.6024931.8529571.921653e-08
0.6052961.852681.930593e-08
0.6081111.8524061.939574e-08
0.610941.8521341.948597e-08
0.6137811.8518651.957662e-08
0.6166361.8515991.966769e-08
0.6195041.8513351.975919e-08
0.6223861.8510741.985111e-08
0.6252811.8508151.994346e-08
0.6281891.8505582.003623e-08
0.6311111.8503042.012944e-08
0.6340471.8500522.022308e-08
0.6369961.8498022.031716e-08
0.6399591.8495552.041168e-08
0.6429351.849312.050663e-08
0.6459261.8490672.060203e-08
0.648931.8488272.069787e-08
0.651.8487422.073200e-08
0.6519491.8485892.057627e-08
0.6549811.8483522.033392e-08
0.6580281.8481182.009044e-08
0.6610881.8478861.984583e-08
0.6641631.8476561.960008e-08
0.6672521.8474291.935319e-08
0.6703561.8472031.910515e-08
0.6734741.8469791.885595e-08
0.6766071.8467571.860560e-08
0.6797541.8465371.835408e-08
0.6829151.8463191.810139e-08
0.6860921.8461031.784753e-08
0.6892831.8458891.759249e-08
0.6924891.8456761.733626e-08
0.695711.8454661.707884e-08
0.6989461.8452571.682022e-08
0.71.845191.673600e-08
0.7021971.845051.664831e-08
0.7054631.8448451.651795e-08
0.7087451.8446421.638700e-08
0.7120411.844441.625543e-08
0.7153531.844241.612325e-08
0.7186811.8440411.599045e-08
0.7220231.8438451.585704e-08
0.7253821.843651.572301e-08
0.7287561.8434561.558835e-08
0.7321461.8432641.545307e-08
0.7355511.8430741.531716e-08
0.7389721.8428851.518062e-08
0.7424091.8426981.504344e-08
0.7458631.8425121.490562e-08
0.7493321.8423281.476716e-08
0.7528171.8421451.462806e-08
0.7563191.8419641.448831e-08
0.7598371.8417841.434791e-08
0.7633711.8416061.420686e-08
0.7669221.8414291.406515e-08
0.7704891.8412531.392279e-08
0.7740731.8410791.377976e-08
0.7776731.8409061.363606e-08
0.781291.8407341.349170e-08
0.7849241.8405641.334666e-08
0.7885751.8403941.320096e-08
0.7922431.8402271.305457e-08
0.7959281.840061.290750e-08
0.799631.8398951.275975e-08
0.81.8398781.274500e-08
0.803351.8397311.279840e-08
0.8070861.8395681.285796e-08
0.810841.8394061.291780e-08
0.8146121.8392461.297791e-08
0.8184011.8390861.303831e-08
0.8222081.8389281.309899e-08
0.8260321.8387711.315995e-08
0.8298741.8386151.322119e-08
0.8337341.838461.328272e-08
0.8376121.8383061.334454e-08
0.8415081.8381531.340664e-08
0.8454221.8380011.346903e-08
0.8493551.8378511.353171e-08
0.851.8378261.354200e-08
0.8533051.8377011.359462e-08
0.8572741.8375521.365781e-08
0.8612621.8374041.372129e-08
0.8652681.8372581.378506e-08
0.8692921.8371121.384913e-08
0.8733361.8369671.391350e-08
0.8773981.8368231.397817e-08
0.8814791.836681.404315e-08
0.8855791.8365381.410842e-08
0.8896981.8363961.417399e-08
0.8938361.8362561.423988e-08
0.8979941.8361161.430606e-08
0.91.836051.433800e-08
0.9021711.8359781.437260e-08
0.9063671.835841.443949e-08
0.9105831.8357031.450669e-08
0.9148181.8355661.457420e-08
0.9190731.8354311.464203e-08
0.9233481.8352961.471017e-08
0.9276431.8351621.477863e-08
0.9319581.8350291.484741e-08
0.9362931.8348971.491651e-08
0.9406481.8347651.498593e-08
0.9450231.8346341.505567e-08
0.9494191.8345031.512573e-08
0.951.8344861.513500e-08
0.9538351.8343741.519605e-08
0.9582711.8342451.526668e-08
0.9627291.8341161.533764e-08
0.9672071.8339891.540893e-08
0.9717051.8338621.548055e-08
0.9762251.8337351.555250e-08
0.9807661.8336091.562479e-08
0.9853281.8334841.569742e-08
0.9899111.8333591.577038e-08
0.9945151.8332351.584368e-08
0.9991411.8331121.591732e-08
11.8330891.593100e-08
1.003791.8329891.599136e-08
1.008461.8328661.606575e-08
1.013151.8327441.614049e-08
1.017861.8326231.621558e-08
1.022591.8325021.629101e-08
1.027351.8323821.636680e-08
1.032131.8322621.644293e-08
1.036931.8321421.651943e-08
1.041751.8320231.659628e-08
1.04661.8319051.667348e-08
1.051471.8317871.675105e-08
1.056361.8316691.682897e-08
1.061.8315821.688700e-08
1.061271.8315521.690726e-08
1.066211.8314351.698593e-08
1.071171.8313181.706496e-08
1.076151.8312021.714435e-08
1.081151.8310871.722412e-08
1.086181.8309711.730426e-08
1.091241.8308561.738477e-08
1.096311.8307411.746565e-08
1.101411.8306271.754691e-08
1.106531.8305131.762855e-08
1.111681.8303991.771057e-08
1.116851.8302861.779297e-08
1.122051.8301731.787576e-08
1.127271.830061.795892e-08
1.132511.8299471.804248e-08
1.137781.8298351.812642e-08
1.143071.8297221.821076e-08
1.148391.8296111.829549e-08
1.153731.8294991.838061e-08
1.159091.8293871.846612e-08
1.164481.8292761.855204e-08
1.16991.8291651.863835e-08
1.175341.8290541.872507e-08
1.180811.8289431.881219e-08
1.18631.8288331.889971e-08
1.191821.8287221.898764e-08
1.197361.8286121.907598e-08
1.21.8285591.911800e-08
1.202931.8285011.916472e-08
1.208531.8283911.925385e-08
1.214151.8282811.934340e-08
1.21981.8281711.943336e-08
1.225471.8280621.952374e-08
1.231171.8279521.961454e-08
1.23691.8278421.970577e-08
1.242651.8277331.979742e-08
1.248431.8276231.988949e-08
1.254241.8275131.998199e-08
1.260071.8274042.007493e-08
1.265931.8272942.016829e-08
1.271821.8271852.026209e-08
1.277741.8270752.035633e-08
1.283681.8269662.045101e-08
1.289651.8268562.054612e-08
1.295651.8267462.064168e-08
1.301671.8266372.073768e-08
1.307731.8265272.083413e-08
1.313811.8264172.093103e-08
1.319921.8263072.102837e-08
1.326061.8261972.112617e-08
1.332231.8260872.122443e-08
1.338431.8259772.132314e-08
1.344651.8258672.142231e-08
1.350911.8257562.152195e-08
1.357191.8256462.162204e-08
1.36351.8255352.172260e-08
1.369851.8254242.182363e-08
1.376221.8253132.192513e-08
1.382621.8252022.202711e-08
1.389051.825092.212955e-08
1.395511.8249792.223247e-08
1.41.8249012.230400e-08
1.4021.8248672.233588e-08
1.408521.8247552.243976e-08
1.415071.8246422.254412e-08
1.421661.824532.264897e-08
1.428271.8244172.275431e-08
1.434911.8243042.286014e-08
1.441591.824192.296646e-08
1.448291.8240772.307328e-08
1.455031.8239632.318059e-08
1.46181.8238482.328840e-08
1.468591.8237342.339671e-08
1.475431.8236192.350553e-08
1.482291.8235032.361485e-08
1.489181.8233882.372468e-08
1.496111.8232722.383503e-08
1.503071.8231552.394588e-08
1.510061.8230382.405725e-08
1.517081.8229212.416914e-08
1.524141.8228032.428155e-08
1.531231.8226852.439448e-08
1.538351.8225672.450794e-08
1.545511.8224482.462193e-08
1.55271.8223292.473644e-08
1.559921.8222092.485149e-08
1.567171.8220882.496707e-08
1.574461.8219682.508319e-08
1.581791.8218462.519985e-08
1.589141.8217242.531706e-08
1.596541.8216022.543481e-08
1.61.8215452.549000e-08
1.603961.8214792.669249e-08
1.611421.8213562.895725e-08
1.618921.8212323.123255e-08
1.626451.8211073.351843e-08
1.634011.8209823.581494e-08
1.641611.8208563.812214e-08
1.649251.820734.044006e-08
1.656921.8206034.276877e-08
1.664631.8204754.510831e-08
1.672371.8203474.745873e-08
1.680151.8202184.982008e-08
1.687961.8200885.219242e-08
1.695811.8199585.457579e-08
1.70371.8198265.697025e-08
1.711631.8196955.937584e-08
1.719591.8195626.179263e-08
1.727591.8194296.422065e-08
1.735621.8192956.665997e-08
1.743691.819166.911064e-08
1.751811.8190257.157270e-08
1.759951.8188887.404622e-08
1.768141.8187517.653124e-08
1.776361.8186137.902782e-08
1.784631.8184758.153601e-08
1.792931.8183358.405587e-08
1.81.8182168.620300e-08
1.801271.8181948.789906e-08
1.809641.8180539.911955e-08
1.818061.8179111.103922e-07
1.826521.8177681.217173e-07
1.835011.8176231.330951e-07
1.843551.8174781.445259e-07
1.852121.8173321.560097e-07
1.860741.8171851.675470e-07
1.869391.8170381.791380e-07
1.878091.8168891.907829e-07
1.886821.8167392.024819e-07
1.89561.8165882.142354e-07
1.904421.8164362.260435e-07
1.913281.8162832.379065e-07
1.922181.8161292.498248e-07
1.931121.8159732.617984e-07
1.94011.8158172.738278e-07
1.949121.815662.859131e-07
1.958191.8155012.980546e-07
1.96731.8153413.102526e-07
1.976451.815183.225073e-07
1.985641.8150183.348191e-07
1.994881.8148553.471881e-07
21.8147643.540500e-07
2.004161.814693.657336e-07
2.013481.8145253.919461e-07
2.022841.8143584.182805e-07
2.032251.8141894.447375e-07
2.04171.814024.713174e-07
2.05121.8138494.980210e-07
2.060741.8136775.248488e-07
2.070331.8135035.518014e-07
2.079961.8133285.788794e-07
2.089631.8131526.060833e-07
2.099351.8129746.334137e-07
2.109121.8127956.608713e-07
2.118931.8126146.884566e-07
2.128781.8124327.161702e-07
2.138681.8122497.440126e-07
2.148631.8120647.719846e-07
2.158621.8118778.000867e-07
2.168671.8116898.283196e-07
2.178751.8114998.566837e-07
2.188891.8113088.851798e-07
2.199071.8111159.138084e-07
2.21.8110979.164300e-07
2.20931.8109211.053256e-06
2.219571.8107241.204504e-06
2.22991.8105271.356456e-06
2.240271.8103271.509114e-06
2.250691.8101261.662483e-06
2.261161.8099231.816565e-06
2.271671.8097181.971363e-06
2.282241.8095122.126882e-06
2.292861.8093032.283124e-06
2.303521.8090932.440093e-06
2.314241.8088812.597791e-06
2.3251.8086672.756224e-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
—