Optical constants

Refractive index of D-ZLAF85A-25 (CDGM)

D-ZLAF85A-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
1.8511
Extinction coefficient k
3.75584e-08
Permittivity ε1
3.42656
Permittivity ε2
1.39048e-07
Absorption coefficient α
0.00803221 cm⁻¹
Penetration depth δ = λ/(2πk)
2.48997e+09 nm
Abbe number Vd
40.056
Chromatic dispersion dn/dλ
-0.108369 µm⁻¹
Group index ng
1.91477
Group velocity dispersion
205.356 fs²/mm
Dispersion parameter D
-1120.33 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-ZLAF85A-25 (CDGM): D-ZLAF85A-25
mat = ls.fetch_refractiveindex("specs", "CDGM-optical", "D-ZLAF85A-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=1.37428361λ2λ2−105.610997+0.412199165λ2λ2−0.0373787374+1.91320505λ2λ2−0.00975370563

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.37428361
C3105.610997
C40.412199165
C50.0373787374
C61.91320505
C70.00975370563

Comments and conditions

anneal rate:25°C/h

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 5.25e-06 2.15e-08 -1.05e-10 8.21e-07 -6.33e-10 0.216
nd
1.851100
Vd
40.055609
glass code
851401
density
value: 5220
thermal expansion
value: 7.8e-06, temperature range: 293 573
dPgF
-0.0075
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 4.94e-06 K⁻¹ at 633 nm, dn/dT = 3.66e-06 K⁻¹ at 1310 nm, dn/dT = 3.55e-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-ZLAF85A-25 (CDGM), D-ZLAF85A-25: n and k versus wavelength
λ (µm)nk
0.3651.9067131.299630e-06
0.3666981.9057751.159373e-06
0.3684031.9048491.018464e-06
0.371.9039978.865600e-07
0.3701171.9039358.825271e-07
0.3718381.9030338.231530e-07
0.3735681.9021437.635028e-07
0.3753061.9012657.035751e-07
0.3770511.9003986.433687e-07
0.3788051.8995435.828822e-07
0.381.8989685.416700e-07
0.3805671.8986985.312659e-07
0.3823371.8978654.987856e-07
0.3841161.8970424.661542e-07
0.3859021.8962294.333710e-07
0.3876971.8954274.004353e-07
0.38951.8946353.673464e-07
0.391.8944183.581800e-07
0.3913121.8938533.455533e-07
0.3931321.8930813.280383e-07
0.3949611.8923193.104418e-07
0.3967981.8915662.927634e-07
0.3986441.8908222.750028e-07
0.41.8902832.619500e-07
0.4004981.8900882.595222e-07
0.4023611.8893622.504371e-07
0.4042321.8886462.413097e-07
0.4061121.8879382.321399e-07
0.4080011.8872392.229275e-07
0.4098991.8865482.136721e-07
0.4118061.8858662.043738e-07
0.4137211.8851921.950321e-07
0.4156451.8845261.856471e-07
0.4175791.8838681.762183e-07
0.4195211.8832181.667458e-07
0.421.8830591.644100e-07
0.4214721.8825751.614902e-07
0.4234331.8819411.576027e-07
0.4254021.8813131.536972e-07
0.4273811.8806941.497734e-07
0.4293691.8800811.458315e-07
0.4313661.8794751.418711e-07
0.4333721.8788771.378924e-07
0.4353881.8782861.338951e-07
0.4374131.8777011.298793e-07
0.4394481.8771231.258448e-07
0.441.8769681.247500e-07
0.4414921.8765521.226377e-07
0.4435451.8759871.197303e-07
0.4456091.8754291.168094e-07
0.4476811.8748771.138749e-07
0.4497641.8743321.109268e-07
0.4518561.8737931.079650e-07
0.4539571.8732591.049893e-07
0.4560691.8727321.019999e-07
0.458191.8722119.899648e-08
0.461.8717729.643400e-08
0.4603211.8716959.612453e-08
0.4624621.8711869.406211e-08
0.4646131.8706829.199010e-08
0.4667751.8701838.990845e-08
0.4689461.869698.781711e-08
0.4711271.8692038.571605e-08
0.4733181.8687218.360522e-08
0.475521.8682448.148457e-08
0.4777321.8677727.935405e-08
0.4799541.8673067.721362e-08
0.481.8672967.716900e-08
0.4821861.8668457.530710e-08
0.4844291.8663887.339690e-08
0.4866821.8659377.147782e-08
0.4889461.8654916.954981e-08
0.491221.8650496.761283e-08
0.4935051.8646126.566685e-08
0.49581.864186.371181e-08
0.4981071.8637526.174768e-08
0.51.8634066.013500e-08
0.5004231.8633295.992348e-08
0.5027511.8629115.876059e-08
0.5050891.8624965.759230e-08
0.5074391.8620875.641857e-08
0.5097991.8616815.523938e-08
0.512171.861285.405471e-08
0.5145531.8608835.286452e-08
0.5169461.860495.166880e-08
0.519351.8601025.046752e-08
0.5217661.8597174.926065e-08
0.5241931.8593364.804817e-08
0.5266311.858964.683005e-08
0.5290811.8585874.560626e-08
0.5315421.8582184.437678e-08
0.5340141.8578534.314158e-08
0.5364981.8574914.190064e-08
0.5389931.8571344.065392e-08
0.54151.856783.940141e-08
0.5440191.8564293.814306e-08
0.5465491.8560823.687887e-08
0.5490921.8557393.560880e-08
0.551.8556173.515500e-08
0.5516461.8553993.526019e-08
0.5542121.8550623.542420e-08
0.5567891.8547293.558898e-08
0.5593791.8543993.575452e-08
0.5619811.8540733.592083e-08
0.5645951.8537493.608791e-08
0.5672211.8534293.625578e-08
0.5698591.8531133.642442e-08
0.572511.8527993.659384e-08
0.5751731.8524883.676406e-08
0.5778481.852183.693507e-08
0.5805361.8518763.710687e-08
0.5832361.8515743.727947e-08
0.5859491.8512753.745287e-08
0.5886751.850983.762708e-08
0.5914131.8506873.780210e-08
0.5941641.8503973.797794e-08
0.5969271.8501093.815459e-08
0.5997041.8498253.833206e-08
0.61.8497953.835100e-08
0.6024931.8495433.825047e-08
0.6052961.8492643.813748e-08
0.6081111.8489873.802396e-08
0.610941.8487133.790992e-08
0.6137811.8484423.779534e-08
0.6166361.8481733.768023e-08
0.6195041.8479073.756459e-08
0.6223861.8476433.744840e-08
0.6252811.8473823.733168e-08
0.6281891.8471233.721441e-08
0.6311111.8468673.709660e-08
0.6340471.8466133.697824e-08
0.6369961.8463613.685933e-08
0.6399591.8461123.673987e-08
0.6429351.8458653.661985e-08
0.6459261.845623.649927e-08
0.648931.8453783.637814e-08
0.651.8452923.633500e-08
0.6519491.8451373.600714e-08
0.6549811.8448993.549690e-08
0.6580281.8446633.498429e-08
0.6610881.8444293.446930e-08
0.6641631.8441973.395191e-08
0.6672521.8439673.343211e-08
0.6703561.843743.290990e-08
0.6734741.8435143.238526e-08
0.6766071.843293.185817e-08
0.6797541.8430683.132864e-08
0.6829151.8428493.079664e-08
0.6860921.8426313.026217e-08
0.6892831.8424152.972521e-08
0.6924891.8422012.918576e-08
0.695711.8419882.864379e-08
0.6989461.8417782.809931e-08
0.71.841712.792200e-08
0.7021971.8415692.786913e-08
0.7054631.8413622.779055e-08
0.7087451.8411572.771160e-08
0.7120411.8409542.763228e-08
0.7153531.8407522.755260e-08
0.7186811.8405522.747254e-08
0.7220231.8403542.739212e-08
0.7253821.8401572.731131e-08
0.7287561.8399622.723013e-08
0.7321461.8397692.714858e-08
0.7355511.8395772.706664e-08
0.7389721.8393872.698433e-08
0.7424091.8391982.690163e-08
0.7458631.8390112.681854e-08
0.7493321.8388252.673507e-08
0.7528171.8386412.665122e-08
0.7563191.8384582.656697e-08
0.7598371.8382772.648233e-08
0.7633711.8380972.639729e-08
0.7669221.8379182.631186e-08
0.7704891.8377412.622604e-08
0.7740731.8375652.613981e-08
0.7776731.8373912.605318e-08
0.781291.8372182.596615e-08
0.7849241.8370462.587872e-08
0.7885751.8368762.579088e-08
0.7922431.8367072.570263e-08
0.7959281.8365392.561396e-08
0.799631.8363722.552489e-08
0.81.8363562.551600e-08
0.803351.8362072.471379e-08
0.8070861.8360422.381894e-08
0.810841.8358792.291993e-08
0.8146121.8357182.201673e-08
0.8184011.8355572.110933e-08
0.8222081.8353972.019772e-08
0.8260321.8352391.928186e-08
0.8298741.8350821.836174e-08
0.8337341.8349261.743734e-08
0.8376121.8347711.650865e-08
0.8415081.8346161.557563e-08
0.8454221.8344641.463827e-08
0.8493551.8343121.369656e-08
0.851.8342871.354200e-08
0.8533051.8341611.359462e-08
0.8572741.8340111.365781e-08
0.8612621.8338621.372129e-08
0.8652681.8337141.378506e-08
0.8692921.8335671.384913e-08
0.8733361.8334211.391350e-08
0.8773981.8332761.397817e-08
0.8814791.8331321.404315e-08
0.8855791.8329881.410842e-08
0.8896981.8328461.417399e-08
0.8938361.8327041.423988e-08
0.8979941.8325641.430606e-08
0.91.8324961.433800e-08
0.9021711.8324241.437260e-08
0.9063671.8322851.443949e-08
0.9105831.8321471.450669e-08
0.9148181.8320091.457420e-08
0.9190731.8318731.464203e-08
0.9233481.8317371.471017e-08
0.9276431.8316021.477863e-08
0.9319581.8314681.484741e-08
0.9362931.8313341.491651e-08
0.9406481.8312021.498593e-08
0.9450231.831071.505567e-08
0.9494191.8309381.512573e-08
0.951.8309211.513500e-08
0.9538351.8308081.519605e-08
0.9582711.8306781.526668e-08
0.9627291.8305481.533764e-08
0.9672071.8304191.540893e-08
0.9717051.8302911.548055e-08
0.9762251.8301641.555250e-08
0.9807661.8300371.562479e-08
0.9853281.8299111.569742e-08
0.9899111.8297851.577038e-08
0.9945151.829661.584368e-08
0.9991411.8295361.591732e-08
11.8295131.593100e-08
1.003791.8294121.599136e-08
1.008461.8292891.606575e-08
1.013151.8291661.614049e-08
1.017861.8290431.621558e-08
1.022591.8289221.629101e-08
1.027351.82881.636680e-08
1.032131.828681.644293e-08
1.036931.8285591.651943e-08
1.041751.8284391.659628e-08
1.04661.828321.667348e-08
1.051471.8282011.675105e-08
1.056361.8280821.682897e-08
1.061.8279951.688700e-08
1.061271.8279641.690726e-08
1.066211.8278461.698593e-08
1.071171.8277291.706496e-08
1.076151.8276121.714435e-08
1.081151.8274951.722412e-08
1.086181.8273791.730426e-08
1.091241.8272631.738477e-08
1.096311.8271481.746565e-08
1.101411.8270321.754691e-08
1.106531.8269171.762855e-08
1.111681.8268031.771057e-08
1.116851.8266881.779297e-08
1.122051.8265741.787576e-08
1.127271.8264611.795892e-08
1.132511.8263471.804248e-08
1.137781.8262341.812642e-08
1.143071.8261211.821076e-08
1.148391.8260081.829549e-08
1.153731.8258961.838061e-08
1.159091.8257831.846612e-08
1.164481.8256711.855204e-08
1.16991.8255591.863835e-08
1.175341.8254471.872507e-08
1.180811.8253361.881219e-08
1.18631.8252241.889971e-08
1.191821.8251131.898764e-08
1.197361.8250021.907598e-08
1.21.8249491.911800e-08
1.202931.8248911.916472e-08
1.208531.824781.925385e-08
1.214151.8246691.934340e-08
1.21981.8245581.943336e-08
1.225471.8244471.952374e-08
1.231171.8243371.961454e-08
1.23691.8242261.970577e-08
1.242651.8241161.979742e-08
1.248431.8240051.988949e-08
1.254241.8238951.998199e-08
1.260071.8237852.007493e-08
1.265931.8236742.016829e-08
1.271821.8235642.026209e-08
1.277741.8234542.035633e-08
1.283681.8233432.045101e-08
1.289651.8232332.054612e-08
1.295651.8231222.064168e-08
1.301671.8230122.073768e-08
1.307731.8229012.083413e-08
1.313811.8227912.093103e-08
1.319921.822682.102837e-08
1.326061.8225692.112617e-08
1.332231.8224582.122443e-08
1.338431.8223472.132314e-08
1.344651.8222362.142231e-08
1.350911.8221252.152195e-08
1.357191.8220132.162204e-08
1.36351.8219022.172260e-08
1.369851.821792.182363e-08
1.376221.8216782.192513e-08
1.382621.8215662.202711e-08
1.389051.8214542.212955e-08
1.395511.8213412.223247e-08
1.41.8212632.230400e-08
1.4021.8212282.233588e-08
1.408521.8211152.243976e-08
1.415071.8210022.254412e-08
1.421661.8208892.264897e-08
1.428271.8207752.275431e-08
1.434911.8206612.286014e-08
1.441591.8205472.296646e-08
1.448291.8204322.307328e-08
1.455031.8203172.318059e-08
1.46181.8202022.328840e-08
1.468591.8200872.339671e-08
1.475431.8199712.350553e-08
1.482291.8198542.361485e-08
1.489181.8197382.372468e-08
1.496111.8196212.383503e-08
1.503071.8195042.394588e-08
1.510061.8193862.405725e-08
1.517081.8192682.416914e-08
1.524141.8191492.428155e-08
1.531231.819032.439448e-08
1.538351.8189112.450794e-08
1.545511.8187912.462193e-08
1.55271.8186712.473644e-08
1.559921.818552.485149e-08
1.567171.8184292.496707e-08
1.574461.8183072.508319e-08
1.581791.8181842.519985e-08
1.589141.8180622.531706e-08
1.596541.8179382.543481e-08
1.61.817882.549000e-08
1.603961.8178142.555312e-08
1.611421.817692.567201e-08
1.618921.8175652.579144e-08
1.626451.8174392.591144e-08
1.634011.8173132.603199e-08
1.641611.8171862.615310e-08
1.649251.8170592.627477e-08
1.656921.8169312.639701e-08
1.664631.8168022.651982e-08
1.672371.8166732.664320e-08
1.680151.8165422.676716e-08
1.687961.8164122.689169e-08
1.695811.816282.701680e-08
1.70371.8161482.714249e-08
1.711631.8160152.726877e-08
1.719591.8158822.739563e-08
1.727591.8157472.752308e-08
1.735621.8156122.765113e-08
1.743691.8154762.777977e-08
1.751811.815342.790901e-08
1.759951.8152022.803886e-08
1.768141.8150642.816930e-08
1.776361.8149252.830035e-08
1.784631.8147852.843202e-08
1.792931.8146442.856429e-08
1.81.8145242.867700e-08
1.801271.8145023.022340e-08
1.809641.814364.045383e-08
1.818061.8142165.073185e-08
1.826521.8140726.105767e-08
1.835011.8139267.143152e-08
1.843551.813788.185363e-08
1.852121.8136339.232421e-08
1.860741.8134841.028435e-07
1.869391.8133351.134117e-07
1.878091.8131851.240291e-07
1.886821.8130341.346958e-07
1.89561.8128811.454122e-07
1.904421.8127281.561784e-07
1.913281.8125741.669947e-07
1.922181.8124181.778613e-07
1.931121.8122611.887784e-07
1.94011.8121041.997463e-07
1.949121.8119452.107653e-07
1.958191.8117852.218355e-07
1.96731.8116232.329572e-07
1.976451.8114612.441306e-07
1.985641.8112972.553560e-07
1.994881.8111332.666336e-07
21.8110412.728900e-07
2.004161.8109662.847301e-07
2.013481.8107993.112935e-07
2.022841.8106313.379806e-07
2.032251.8104613.647917e-07
2.04171.8102893.917276e-07
2.05121.8101174.187887e-07
2.060741.8099434.459757e-07
2.070331.8097684.732892e-07
2.079961.8095915.007297e-07
2.089631.8094135.282979e-07
2.099351.8092335.559943e-07
2.109121.8090525.838195e-07
2.118931.808876.117741e-07
2.128781.8086866.398588e-07
2.138681.8085016.680741e-07
2.148631.8083146.964206e-07
2.158621.8081257.248990e-07
2.168671.8079357.535098e-07
2.178751.8077447.822537e-07
2.188891.807558.111313e-07
2.199071.8073568.401433e-07
2.21.8073388.428000e-07
2.20931.8071599.852233e-07
2.219571.8069611.142659e-06
2.22991.8067611.300828e-06
2.240271.8065591.459732e-06
2.250691.8063561.619375e-06
2.261161.8061511.779760e-06
2.271671.8059441.940892e-06
2.282241.8057352.102773e-06
2.292861.8055242.265407e-06
2.303521.8053122.428798e-06
2.314241.8050982.592948e-06
2.3251.8048812.757863e-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
—