Optical constants

Refractive index of H-ZF7LAGT (CDGM)

H-ZF7LAGT: 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
1.80517
Extinction coefficient k
2.09233e-08
Permittivity ε1
3.25865
Permittivity ε2
7.55405e-08
Absorption coefficient α
0.00447465 cm⁻¹
Penetration depth δ = λ/(2πk)
4.46962e+09 nm
Abbe number Vd
25.456
Chromatic dispersion dn/dλ
-0.158239 µm⁻¹
Group index ng
1.89815
Group velocity dispersion
327.073 fs²/mm
Dispersion parameter D
-1784.36 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-ZF7LAGT (CDGM): H-ZF7LAGT
cdgm_h_zf7lagt = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-ZF7LAGT", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_zf7lagt.range_nm)  # (365, 2325) nm
eps = cdgm_h_zf7lagt.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=1.65846092λ2λ2−144.874699+0.298796445λ2λ2−0.0635424599+1.8184834λ2λ2−0.0141908346

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C21.65846092
C3144.874699
C40.298796445
C50.0635424599
C61.8184834
C70.0141908346

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -7.91e-06 1.24e-08 -3.12e-11 1.09e-06 1.48e-09 0.281
nd
1.805180
Vd
25.456256
glass code
805255
glass status
standard
density
value: 3350
thermal expansion
value: 9e-06, temperature range: 243 343; value: 1.13e-05, temperature range: 293 573
dPgF
0.0127
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -2.81e-06 K⁻¹ at 633 nm, dn/dT = -4.35e-06 K⁻¹ at 1310 nm, dn/dT = -4.45e-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
H-ZF7LAGT (CDGM), H-ZF7LAGT: n and k versus wavelength
λ (µm)nk
0.3651.8986887.512300e-06
0.3666981.8968376.155232e-06
0.3684031.8950234.791852e-06
0.371.8933653.515600e-06
0.3701171.8932453.489237e-06
0.3718381.8915023.101117e-06
0.3735681.8897922.711191e-06
0.3753061.8881162.319452e-06
0.3770511.8864711.925891e-06
0.3788051.8848571.530499e-06
0.381.8837791.261100e-06
0.3805671.8832731.223660e-06
0.3823371.8817191.106776e-06
0.3841161.8801929.893475e-07
0.3859021.8786948.713734e-07
0.3876971.8772227.528505e-07
0.38951.8757766.337763e-07
0.391.8753816.007900e-07
0.3913121.8743555.701608e-07
0.3931321.8729595.276737e-07
0.3949611.8715874.849889e-07
0.3967981.8702394.421057e-07
0.3986441.8689143.990229e-07
0.41.8679573.673600e-07
0.4004981.867613.629223e-07
0.4023611.8663293.463160e-07
0.4042321.8650683.296324e-07
0.4061121.8638293.128712e-07
0.4080011.8626092.960320e-07
0.4098991.8614092.791146e-07
0.4118061.8602282.621184e-07
0.4137211.8590662.450432e-07
0.4156451.8579232.278885e-07
0.4175791.8567972.106541e-07
0.4195211.8556891.933395e-07
0.421.8554191.890700e-07
0.4214721.8545981.846020e-07
0.4234331.8535231.786532e-07
0.4254021.8524651.726766e-07
0.4273811.8514231.666723e-07
0.4293691.8503971.606401e-07
0.4313661.8493861.545797e-07
0.4333721.8483891.484912e-07
0.4353881.8474081.423744e-07
0.4374131.8464411.362292e-07
0.4394481.8454881.300553e-07
0.441.8452321.283800e-07
0.4414921.8445481.254368e-07
0.4435451.8436231.213857e-07
0.4456091.842711.173158e-07
0.4476811.841811.132269e-07
0.4497641.8409231.091190e-07
0.4518561.8400491.049920e-07
0.4539571.8391861.008458e-07
0.4560691.8383369.668037e-08
0.458191.8374979.249552e-08
0.461.8367948.892500e-08
0.4603211.836678.867357e-08
0.4624621.8358548.699794e-08
0.4646131.835058.531452e-08
0.4667751.8342568.362326e-08
0.4689461.8334728.192414e-08
0.4711271.83278.021712e-08
0.4733181.8319377.850216e-08
0.475521.8311857.677922e-08
0.4777321.8304427.504826e-08
0.4799541.8297097.330926e-08
0.481.8296947.327300e-08
0.4821861.8289867.139569e-08
0.4844291.8282726.946968e-08
0.4866821.8275686.753471e-08
0.4889461.8268726.559074e-08
0.491221.8261856.363773e-08
0.4935051.8255086.167564e-08
0.49581.8248385.970441e-08
0.4981071.8241775.772402e-08
0.51.8236435.609800e-08
0.5004231.8235255.584602e-08
0.5027511.822885.446071e-08
0.5050891.8222445.306895e-08
0.5074391.8216155.167072e-08
0.5097991.8209955.026598e-08
0.512171.8203824.885471e-08
0.5145531.8197764.743688e-08
0.5169461.8191784.601245e-08
0.519351.8185874.458139e-08
0.5217661.8180034.314368e-08
0.5241931.8174274.169929e-08
0.5266311.8168574.024817e-08
0.5290811.8162943.879030e-08
0.5315421.8157383.732566e-08
0.5340141.8151883.585420e-08
0.5364981.8146453.437589e-08
0.5389931.8141083.289072e-08
0.54151.8135783.139863e-08
0.5440191.8130532.989960e-08
0.5465491.8125352.839360e-08
0.5490921.8120232.688059e-08
0.551.8118422.634000e-08
0.5516461.8115172.610292e-08
0.5542121.8110162.573328e-08
0.5567891.8105222.536192e-08
0.5593791.8100332.498883e-08
0.5619811.8095492.461401e-08
0.5645951.8090722.423744e-08
0.5672211.8085992.385912e-08
0.5698591.8081322.347904e-08
0.572511.807672.309720e-08
0.5751731.8072132.271358e-08
0.5778481.8067612.232817e-08
0.5805361.8063152.194097e-08
0.5832361.8058732.155197e-08
0.5859491.8054362.116116e-08
0.5886751.8050042.076853e-08
0.5914131.8045772.037408e-08
0.5941641.8041551.997779e-08
0.5969271.8037371.957966e-08
0.5997041.8033231.917968e-08
0.61.8032791.913700e-08
0.6024931.8029141.921653e-08
0.6052961.802511.930593e-08
0.6081111.8021091.939574e-08
0.610941.8017141.948597e-08
0.6137811.8013221.957662e-08
0.6166361.8009341.966769e-08
0.6195041.8005511.975919e-08
0.6223861.8001721.985111e-08
0.6252811.7997961.994346e-08
0.6281891.7994252.003623e-08
0.6311111.7990572.012944e-08
0.6340471.7986942.022308e-08
0.6369961.7983342.031716e-08
0.6399591.7979782.041168e-08
0.6429351.7976252.050663e-08
0.6459261.7972762.060203e-08
0.648931.7969312.069787e-08
0.651.7968092.073200e-08
0.6519491.7965892.057627e-08
0.6549811.7962512.033392e-08
0.6580281.7959162.009044e-08
0.6610881.7955851.984583e-08
0.6641631.7952571.960008e-08
0.6672521.7949321.935319e-08
0.6703561.794611.910515e-08
0.6734741.7942921.885595e-08
0.6766071.7939771.860560e-08
0.6797541.7936651.835408e-08
0.6829151.7933561.810139e-08
0.6860921.793051.784753e-08
0.6892831.7927471.759249e-08
0.6924891.7924471.733626e-08
0.695711.792151.707884e-08
0.6989461.7918561.682022e-08
0.71.7917611.673600e-08
0.7021971.7915651.678854e-08
0.7054631.7912761.686663e-08
0.7087451.7909911.694509e-08
0.7120411.7907081.702391e-08
0.7153531.7904271.710310e-08
0.7186811.790151.718265e-08
0.7220231.7898751.726258e-08
0.7253821.7896021.734288e-08
0.7287561.7893331.742355e-08
0.7321461.7890651.750460e-08
0.7355511.7888011.758602e-08
0.7389721.7885381.766783e-08
0.7424091.7882781.775001e-08
0.7458631.7880211.783258e-08
0.7493321.7877661.791553e-08
0.7528171.7875131.799886e-08
0.7563191.7872621.808259e-08
0.7598371.7870141.816670e-08
0.7633711.7867681.825120e-08
0.7669221.7865241.833610e-08
0.7704891.7862831.842139e-08
0.7740731.7860431.850708e-08
0.7776731.7858061.859317e-08
0.781291.7855711.867965e-08
0.7849241.7853371.876654e-08
0.7885751.7851061.885384e-08
0.7922431.7848771.894154e-08
0.7959281.784651.902965e-08
0.799631.7844251.911816e-08
0.81.7844031.912700e-08
0.803351.7842021.875283e-08
0.8070861.783981.833545e-08
0.810841.7837611.791612e-08
0.8146121.7835431.749485e-08
0.8184011.7833281.707161e-08
0.8222081.7831141.664641e-08
0.8260321.7829021.621923e-08
0.8298741.7826911.579006e-08
0.8337341.7824831.535890e-08
0.8376121.7822761.492573e-08
0.8415081.7820711.449054e-08
0.8454221.7818671.405333e-08
0.8493551.7816651.361409e-08
0.851.7816321.354200e-08
0.8533051.7814651.359462e-08
0.8572741.7812661.365781e-08
0.8612621.7810691.372129e-08
0.8652681.7808731.378506e-08
0.8692921.7806791.384913e-08
0.8733361.7804871.391350e-08
0.8773981.7802961.397817e-08
0.8814791.7801061.404315e-08
0.8855791.7799181.410842e-08
0.8896981.7797311.417399e-08
0.8938361.7795461.423988e-08
0.8979941.7793621.430606e-08
0.91.7792741.433800e-08
0.9021711.779181.437260e-08
0.9063671.7789991.443949e-08
0.9105831.7788191.450669e-08
0.9148181.778641.457420e-08
0.9190731.7784631.464203e-08
0.9233481.7782871.471017e-08
0.9276431.7781131.477863e-08
0.9319581.7779391.484741e-08
0.9362931.7777671.491651e-08
0.9406481.7775961.498593e-08
0.9450231.7774261.505567e-08
0.9494191.7772571.512573e-08
0.951.7772351.513500e-08
0.9538351.777091.519605e-08
0.9582711.7769231.526668e-08
0.9627291.7767581.533764e-08
0.9672071.7765941.540893e-08
0.9717051.7764311.548055e-08
0.9762251.7762691.555250e-08
0.9807661.7761081.562479e-08
0.9853281.7759481.569742e-08
0.9899111.7757891.577038e-08
0.9945151.7756311.584368e-08
0.9991411.7754741.591732e-08
11.7754451.593100e-08
1.003791.7753181.599136e-08
1.008461.7751631.606575e-08
1.013151.7750091.614049e-08
1.017861.7748551.621558e-08
1.022591.7747031.629101e-08
1.027351.7745521.636680e-08
1.032131.7744011.644293e-08
1.036931.7742511.651943e-08
1.041751.7741021.659628e-08
1.04661.7739541.667348e-08
1.051471.7738071.675105e-08
1.056361.7736611.682897e-08
1.061.7735521.688700e-08
1.061271.7735151.690726e-08
1.066211.773371.698593e-08
1.071171.7732261.706496e-08
1.076151.7730821.714435e-08
1.081151.772941.722412e-08
1.086181.7727981.730426e-08
1.091241.7726561.738477e-08
1.096311.7725161.746565e-08
1.101411.7723761.754691e-08
1.106531.7722361.762855e-08
1.111681.7720981.771057e-08
1.116851.771961.779297e-08
1.122051.7718221.787576e-08
1.127271.7716851.795892e-08
1.132511.7715491.804248e-08
1.137781.7714141.812642e-08
1.143071.7712781.821076e-08
1.148391.7711441.829549e-08
1.153731.771011.838061e-08
1.159091.7708761.846612e-08
1.164481.7707431.855204e-08
1.16991.7706111.863835e-08
1.175341.7704791.872507e-08
1.180811.7703471.881219e-08
1.18631.7702161.889971e-08
1.191821.7700851.898764e-08
1.197361.7699551.907598e-08
1.21.7698931.911800e-08
1.202931.7698251.965653e-08
1.208531.7696962.068398e-08
1.214151.7695672.171621e-08
1.21981.7694382.275325e-08
1.225471.769312.379510e-08
1.231171.7691822.484181e-08
1.23691.7690542.589338e-08
1.242651.7689272.694984e-08
1.248431.76882.801122e-08
1.254241.7686732.907753e-08
1.260071.7685473.014881e-08
1.265931.7684213.122506e-08
1.271821.7682953.230632e-08
1.277741.7681693.339262e-08
1.283681.7680443.448396e-08
1.289651.7679193.558038e-08
1.295651.7677943.668190e-08
1.301671.7676693.778855e-08
1.307731.7675453.890034e-08
1.313811.7674214.001730e-08
1.319921.7672974.113946e-08
1.326061.7671734.226684e-08
1.332231.7670494.339946e-08
1.338431.7669254.453735e-08
1.344651.7668024.568053e-08
1.350911.7666784.682903e-08
1.357191.7665554.798287e-08
1.36351.7664324.914208e-08
1.369851.7663095.030668e-08
1.376221.7661865.147670e-08
1.382621.7660635.265216e-08
1.389051.765945.383308e-08
1.395511.7658175.501950e-08
1.41.7657325.584400e-08
1.4021.7656945.643695e-08
1.408521.7655715.836937e-08
1.415071.7654486.031078e-08
1.421661.7653256.226121e-08
1.428271.7652026.422072e-08
1.434911.7650796.618935e-08
1.441591.7649566.816713e-08
1.448291.7648337.015411e-08
1.455031.764717.215033e-08
1.46181.7645877.415583e-08
1.468591.7644647.617067e-08
1.475431.764347.819487e-08
1.482291.7642178.022850e-08
1.489181.7640938.227158e-08
1.496111.7639698.432416e-08
1.503071.7638458.638629e-08
1.510061.7637218.845801e-08
1.517081.7635979.053937e-08
1.524141.7634729.263041e-08
1.531231.7633479.473118e-08
1.538351.7632229.684171e-08
1.545511.7630979.896207e-08
1.55271.7629721.010923e-07
1.559921.7628461.032324e-07
1.567171.762721.053825e-07
1.574461.7625941.075426e-07
1.581791.7624681.097127e-07
1.589141.7623411.118929e-07
1.596541.7622141.140833e-07
1.61.7621551.151100e-07
1.603961.7620871.211792e-07
1.611421.7619591.326099e-07
1.618921.7618311.440937e-07
1.626451.7617031.556310e-07
1.634011.7615741.672219e-07
1.641611.7614451.788668e-07
1.649251.7613151.905658e-07
1.656921.7611852.023192e-07
1.664631.7610552.141273e-07
1.672371.7609242.259903e-07
1.680151.7607932.379085e-07
1.687961.7606612.498822e-07
1.695811.7605292.619115e-07
1.70371.7603962.739968e-07
1.711631.7602632.861383e-07
1.719591.7601292.983362e-07
1.727591.7599953.105909e-07
1.735621.759863.229026e-07
1.743691.7597253.352716e-07
1.751811.7595893.476981e-07
1.759951.7594533.601824e-07
1.768141.7593163.727248e-07
1.776361.7591783.853255e-07
1.784631.759043.979848e-07
1.792931.7589014.107030e-07
1.81.7587834.215400e-07
1.801271.7587624.240401e-07
1.809641.7586224.405796e-07
1.818061.7584814.571962e-07
1.826521.758344.738899e-07
1.835011.7581984.906614e-07
1.843551.7580555.075108e-07
1.852121.7579115.244387e-07
1.860741.7577675.414452e-07
1.869391.7576225.585309e-07
1.878091.7574765.756960e-07
1.886821.7573295.929410e-07
1.89561.7571826.102662e-07
1.904421.7570346.276719e-07
1.913281.7568856.451587e-07
1.922181.7567356.627267e-07
1.931121.7565846.803765e-07
1.94011.7564326.981084e-07
1.949121.756287.159228e-07
1.958191.7561277.338200e-07
1.96731.7559727.518004e-07
1.976451.7558177.698645e-07
1.985641.7556617.880127e-07
1.994881.7555048.062452e-07
21.7554168.163600e-07
2.004161.7553468.333031e-07
2.013481.7551878.713154e-07
2.022841.7550269.095045e-07
2.032251.7548659.478712e-07
2.04171.7547039.864163e-07
2.05121.754541.025141e-06
2.060741.7543761.064045e-06
2.070331.754211.103131e-06
2.079961.7540441.142398e-06
2.089631.7538761.181848e-06
2.099351.7537071.221482e-06
2.109121.7535371.261299e-06
2.118931.7533661.301302e-06
2.128781.7531941.341492e-06
2.138681.7530211.381868e-06
2.148631.7528461.422431e-06
2.158621.752671.463184e-06
2.168671.7524931.504126e-06
2.178751.7523141.545258e-06
2.188891.7521341.586582e-06
2.199071.7519531.628098e-06
2.21.7519361.631900e-06
2.20931.751771.705559e-06
2.219571.7515871.786982e-06
2.22991.7514011.868784e-06
2.240271.7512151.950966e-06
2.250691.7510272.033531e-06
2.261161.7508372.116480e-06
2.271671.7506462.199814e-06
2.282241.7504542.283537e-06
2.292861.750262.367648e-06
2.303521.7500642.452151e-06
2.314241.7498672.537047e-06
2.3251.7496692.622337e-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
—