Optical constants

Refractive index of H-ZK50GT (CDGM)

H-ZK50GT: n,k 0.302–2.325 µm

Data
formula 2 + tabulated k
Range
0.302–2.325 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.302–2.325 µm
Refractive index n
1.60738
Extinction coefficient k
1.51379e-08
Permittivity ε1
2.58366
Permittivity ε2
4.86645e-08
Absorption coefficient α
0.00323737 cm⁻¹
Penetration depth δ = λ/(2πk)
6.17785e+09 nm
Abbe number Vd
56.655
Chromatic dispersion dn/dλ
-0.0552393 µm⁻¹
Group index ng
1.63984
Group velocity dispersion
98.53 fs²/mm
Dispersion parameter D
-537.533 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-ZK50GT (CDGM): H-ZK50GT
cdgm_h_zk50gt = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-ZK50GT", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_zk50gt.range_nm)  # (302, 2325) nm
eps = cdgm_h_zk50gt.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=0.434311306λ2λ2+0.00192252587+1.10560033λ2λ2−0.0147271072+0.988776159λ2λ2−110.41165

Valid from 0.302 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C20.434311306
C3-0.00192252587
C41.10560033
C50.0147271072
C60.988776159
C7110.41165

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 3.24e-06 1.77e-08 -2.57e-11 5.34e-07 1.22e-10 0.194
nd
1.607380
Vd
56.654511
glass code
607567
density
value: 3540
thermal expansion
value: 6.8e-06, temperature range: 243 343; value: 7.7e-06, temperature range: 293 573
dPgF
-0.001
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 2.31e-06 K⁻¹ at 633 nm, dn/dT = 1.71e-06 K⁻¹ at 1310 nm, dn/dT = 1.66e-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 431 wavelengths, the same grid as the API and the library
H-ZK50GT (CDGM), H-ZK50GT: n and k versus wavelength
λ (µm)nk
0.3021.656212.066800e-06
0.3035491.6554561.912229e-06
0.3051061.6547121.756864e-06
0.306671.6539781.600704e-06
0.3082431.6532541.443742e-06
0.3098241.652541.285975e-06
0.311.6524611.268400e-06
0.3114131.6518351.186987e-06
0.313011.651141.094956e-06
0.3146151.6504541.002454e-06
0.3162291.6497779.094771e-07
0.317851.649118.160235e-07
0.3194811.6484517.220905e-07
0.321.6482436.921600e-07
0.3211191.6478016.563045e-07
0.3227661.6471596.035373e-07
0.3244211.6465265.504995e-07
0.3260851.6459014.971898e-07
0.3277571.6452854.436066e-07
0.3294381.6446763.897486e-07
0.331.6444753.717500e-07
0.3311281.6440763.536140e-07
0.3328261.6434833.263053e-07
0.3345331.6428982.988566e-07
0.3362491.642322.712671e-07
0.3379731.641752.435361e-07
0.3397061.6411872.156629e-07
0.341.6410922.109400e-07
0.3414481.6406311.960147e-07
0.34321.6400831.779712e-07
0.344961.6395411.598350e-07
0.3467291.6390061.416059e-07
0.3485071.6384781.232833e-07
0.351.6380421.079000e-07
0.3502941.6379571.065997e-07
0.3520911.6374429.866442e-08
0.3538971.6369349.068845e-08
0.3557121.6364328.267157e-08
0.3575361.6359367.461358e-08
0.3593691.6354476.651426e-08
0.361.6352816.372900e-08
0.3612121.6349646.067346e-08
0.3630651.6344865.600501e-08
0.3649271.6340155.131263e-08
0.3667981.6335494.659618e-08
0.368681.6330894.185554e-08
0.371.6327713.852800e-08
0.370571.6326353.754204e-08
0.3724711.6321863.425688e-08
0.3743811.6317433.095487e-08
0.3763011.6313052.763592e-08
0.3782311.6308732.429996e-08
0.381.6304832.124200e-08
0.3801711.6304462.119821e-08
0.382121.6300242.069811e-08
0.384081.6296072.019544e-08
0.386051.6291951.969020e-08
0.388031.6287881.918236e-08
0.391.628391.867700e-08
0.390021.6283861.866529e-08
0.392021.6279881.748135e-08
0.394031.6275961.629135e-08
0.3960511.6272081.509524e-08
0.3980821.6268251.389300e-08
0.41.6264691.275800e-08
0.4001241.6264461.276196e-08
0.4021761.6260721.282742e-08
0.4042391.6257021.289321e-08
0.4063121.6253361.295935e-08
0.4083961.6249751.302582e-08
0.410491.6246181.309263e-08
0.4125951.6242661.315979e-08
0.4147111.6239171.322729e-08
0.4168381.6235721.329513e-08
0.4189761.6232321.336333e-08
0.421.6230711.339600e-08
0.4211251.6228951.343187e-08
0.4232841.6225621.350077e-08
0.4254551.6222341.357002e-08
0.4276371.6219081.363962e-08
0.429831.6215871.370958e-08
0.4320351.6212691.377990e-08
0.434251.6209551.385058e-08
0.4364771.6206451.392163e-08
0.4387161.6203381.399304e-08
0.441.6201641.403400e-08
0.4409661.6200341.406481e-08
0.4432271.6197341.413695e-08
0.44551.6194381.420946e-08
0.4477851.6191441.428235e-08
0.4500821.6188541.435560e-08
0.452391.6185681.442924e-08
0.454711.6182841.450325e-08
0.4570421.6180041.457764e-08
0.4593861.6177271.465241e-08
0.461.6176551.467200e-08
0.4617421.6174531.472757e-08
0.464111.6171821.480311e-08
0.466491.6169131.487903e-08
0.4688831.6166481.495535e-08
0.4712871.6163861.503206e-08
0.4737041.6161271.510916e-08
0.4761341.615871.518666e-08
0.4785751.6156171.526456e-08
0.481.6154711.531000e-08
0.481031.6153661.534280e-08
0.4834971.6151181.542137e-08
0.4859761.6148721.550035e-08
0.4884691.6146291.557973e-08
0.4909741.6143891.565952e-08
0.4934921.6141521.573971e-08
0.4960231.6139171.582032e-08
0.4985671.6136841.590135e-08
0.51.6135551.594700e-08
0.5011231.6134541.598284e-08
0.5036931.6132271.606482e-08
0.5062771.6130021.614723e-08
0.5088731.6127791.623005e-08
0.5114831.6125591.631330e-08
0.5141061.6123411.639698e-08
0.5167431.6121251.648109e-08
0.5193931.6119111.656563e-08
0.5220561.61171.665060e-08
0.5247341.6114911.673601e-08
0.5274251.6112841.682186e-08
0.530131.611081.690814e-08
0.5328491.6108771.699487e-08
0.5355811.6106771.708205e-08
0.5383281.6104781.716967e-08
0.5410891.6102821.725774e-08
0.5438641.6100881.734626e-08
0.5466531.6098951.743524e-08
0.5494571.6097051.752467e-08
0.551.6096691.754200e-08
0.5522751.6095171.739656e-08
0.5551071.609331.721546e-08
0.5579541.6091461.703344e-08
0.5608151.6089631.685047e-08
0.5636911.6087821.666657e-08
0.5665821.6086031.648173e-08
0.5694881.6084251.629594e-08
0.5724091.608251.610919e-08
0.5753441.6080761.592149e-08
0.5782951.6079041.573282e-08
0.5812611.6077341.554319e-08
0.5842421.6075651.535258e-08
0.5872381.6073981.516100e-08
0.590251.6072321.496844e-08
0.5932771.6070691.477488e-08
0.5963191.6069061.458034e-08
0.5993781.6067461.438479e-08
0.61.6067131.434500e-08
0.6024521.6065871.440364e-08
0.6055411.6064291.447755e-08
0.6086471.6062731.455183e-08
0.6117681.6061181.462650e-08
0.6149061.6059651.470154e-08
0.6180591.6058141.477698e-08
0.6212291.6056631.485280e-08
0.6244151.6055141.492901e-08
0.6276171.6053671.500561e-08
0.6308361.6052211.508260e-08
0.6340711.6050761.515998e-08
0.6373231.6049331.523777e-08
0.6405921.6047911.531595e-08
0.6438771.604651.539454e-08
0.6471791.604511.547352e-08
0.651.6043931.554100e-08
0.6504981.6043721.555291e-08
0.6538341.6042351.563264e-08
0.6571871.6040991.571278e-08
0.6605581.6039651.579333e-08
0.6639451.6038311.587430e-08
0.6673511.6036991.595568e-08
0.6707731.6035681.603748e-08
0.6742131.6034381.611969e-08
0.6776711.6033091.620233e-08
0.6811461.6031821.628540e-08
0.684641.6030551.636889e-08
0.6881511.602931.645280e-08
0.691681.6028051.653715e-08
0.6952271.6026821.662193e-08
0.6987931.602561.670715e-08
0.71.6025181.673600e-08
0.7023761.6024381.664115e-08
0.7059791.6023181.649739e-08
0.7095991.6021991.635289e-08
0.7132381.602081.620765e-08
0.7168961.6019631.606167e-08
0.7205731.6018461.591494e-08
0.7242681.6017311.576745e-08
0.7279831.6016161.561921e-08
0.7317161.6015031.547020e-08
0.7354691.601391.532044e-08
0.7392411.6012781.516990e-08
0.7430321.6011671.501859e-08
0.7468431.6010571.486651e-08
0.7506731.6009471.471365e-08
0.7545231.6008391.456000e-08
0.7583921.6007311.440557e-08
0.7622821.6006241.425034e-08
0.7661911.6005181.409432e-08
0.770121.6004131.393749e-08
0.774071.6003081.377987e-08
0.778041.6002041.362143e-08
0.782031.6001011.346218e-08
0.7860411.5999991.330212e-08
0.7900721.5998971.314123e-08
0.7941241.5997961.297952e-08
0.7981961.5996961.281698e-08
0.81.5996521.274500e-08
0.802291.5995961.278150e-08
0.8064051.5994971.284709e-08
0.810541.5993991.291301e-08
0.8146971.5993021.297927e-08
0.8188751.5992051.304587e-08
0.8230751.5991081.311281e-08
0.8272961.5990121.318010e-08
0.8315391.5989171.324773e-08
0.8358031.5988231.331571e-08
0.840091.5987291.338403e-08
0.8443981.5986351.345271e-08
0.8487291.5985421.352174e-08
0.851.5985151.354200e-08
0.8530821.598451.359106e-08
0.8574571.5983581.366071e-08
0.8618541.5982671.373072e-08
0.8662741.5981761.380108e-08
0.8707171.5980861.387181e-08
0.8751821.5979961.394290e-08
0.8796711.5979071.401436e-08
0.8841821.5978181.408618e-08
0.8887171.597731.415837e-08
0.8932741.5976421.423093e-08
0.8978561.5975541.430386e-08
0.91.5975141.433800e-08
0.902461.5974671.437722e-08
0.9070881.5973811.445099e-08
0.9117411.5972941.452514e-08
0.9164161.5972091.459968e-08
0.9211161.5971231.467459e-08
0.925841.5970381.474989e-08
0.9305881.5969531.482558e-08
0.9353611.5968691.490165e-08
0.9401581.5967851.497812e-08
0.944981.5967011.505497e-08
0.9498261.5966181.513222e-08
0.951.5966151.513500e-08
0.9546971.5965351.520978e-08
0.9595931.5964531.528772e-08
0.9645151.596371.536607e-08
0.9694611.5962881.544482e-08
0.9744331.5962061.552397e-08
0.979431.5961251.560353e-08
0.9844531.5960441.568350e-08
0.9895021.5959631.576387e-08
0.9945771.5958821.584466e-08
0.9996781.5958021.592587e-08
11.5957971.593100e-08
1.00481.5957211.600755e-08
1.009961.5956411.608966e-08
1.015141.5955621.617219e-08
1.020341.5954821.625514e-08
1.025581.5954031.633851e-08
1.030841.5953231.642232e-08
1.036121.5952441.650655e-08
1.041441.5951651.659122e-08
1.046781.5950871.667632e-08
1.052151.5950081.676185e-08
1.057541.594931.684783e-08
1.061.5948941.688700e-08
1.062971.5948521.693425e-08
1.068421.5947731.702113e-08
1.07391.5946951.710844e-08
1.07941.5946171.719621e-08
1.084941.594541.728443e-08
1.09051.5944621.737309e-08
1.09611.5943841.746222e-08
1.101721.5943071.755180e-08
1.107371.5942291.764184e-08
1.113051.5941521.773234e-08
1.118761.5940741.782330e-08
1.124491.5939971.791474e-08
1.130261.5939191.800664e-08
1.136061.5938421.809901e-08
1.141881.5937651.819185e-08
1.147741.5936871.828518e-08
1.153621.593611.837898e-08
1.159541.5935331.847326e-08
1.165491.5934551.856802e-08
1.171471.5933781.866328e-08
1.177471.59331.875902e-08
1.183511.5932231.885525e-08
1.189581.5931451.895197e-08
1.195681.5930681.904919e-08
1.21.5930131.911800e-08
1.201811.592991.985821e-08
1.207981.5929122.237299e-08
1.214171.5928342.490066e-08
1.22041.5927562.744130e-08
1.226661.5926782.999497e-08
1.232951.59263.256174e-08
1.239271.5925223.514167e-08
1.245631.5924433.773483e-08
1.252021.5923654.034129e-08
1.258441.5922864.296111e-08
1.264891.5922074.559437e-08
1.271381.5921284.824114e-08
1.27791.5920485.090148e-08
1.284451.5919695.357547e-08
1.291041.5918895.626317e-08
1.297661.5918095.896465e-08
1.304321.5917296.167998e-08
1.311011.5916496.440925e-08
1.317731.5915686.715251e-08
1.324491.5914886.990984e-08
1.331281.5914067.268130e-08
1.338111.5913257.546699e-08
1.344971.5912437.826696e-08
1.351871.5911628.108129e-08
1.35881.5910798.391005e-08
1.365771.5909978.675332e-08
1.372771.5909148.961117e-08
1.379811.5908319.248368e-08
1.386891.5907489.537092e-08
1.3941.5906649.827296e-08
1.41.5905931.007200e-07
1.401151.590581.005075e-07
1.408341.5904959.918181e-08
1.415561.590419.784930e-08
1.422821.5903259.650996e-08
1.430121.5902399.516374e-08
1.437451.5901539.381062e-08
1.444821.5900679.245056e-08
1.452231.589989.108353e-08
1.459681.5898938.970949e-08
1.467171.5898058.832839e-08
1.474691.5897178.694022e-08
1.482251.5896288.554493e-08
1.489861.5895398.414248e-08
1.49751.5894498.273284e-08
1.505181.5893598.131596e-08
1.51291.5892697.989183e-08
1.520651.5891787.846039e-08
1.528451.5890867.702160e-08
1.536291.5889947.557544e-08
1.544171.5889017.412186e-08
1.552091.5888087.266083e-08
1.560051.5887147.119231e-08
1.568051.588626.971625e-08
1.576091.5885256.823262e-08
1.584181.5884296.674139e-08
1.59231.5883336.524250e-08
1.61.5882426.382200e-08
1.600471.5882376.411033e-08
1.608671.5881396.918321e-08
1.616921.5880417.428211e-08
1.625221.5879427.940716e-08
1.633551.5878438.455849e-08
1.641931.5877438.973624e-08
1.650351.5876429.494055e-08
1.658811.5875411.001715e-07
1.667321.5874391.054294e-07
1.675871.5873361.107142e-07
1.684471.5872321.160260e-07
1.693111.5871281.213652e-07
1.701791.5870221.267317e-07
1.710521.5869171.321257e-07
1.719291.586811.375474e-07
1.728111.5867021.429969e-07
1.736971.5865941.484744e-07
1.745881.5864851.539799e-07
1.754831.5863751.595137e-07
1.763831.5862641.650759e-07
1.772881.5861521.706666e-07
1.781971.586041.762859e-07
1.791111.5859261.819341e-07
1.81.5858151.874300e-07
1.800291.5858121.877460e-07
1.809531.5856961.976953e-07
1.818811.585582.076956e-07
1.828131.5854632.177473e-07
1.837511.5853442.278504e-07
1.846931.5852252.380054e-07
1.856411.5851052.482124e-07
1.865931.5849842.584718e-07
1.87551.5848612.687839e-07
1.885111.5847382.791488e-07
1.894781.5846142.895668e-07
1.90451.5844883.000383e-07
1.914271.5843623.105635e-07
1.924081.5842343.211427e-07
1.933951.5841053.317761e-07
1.943871.5839763.424641e-07
1.953841.5838453.532068e-07
1.963861.5837123.640047e-07
1.973931.5835793.748580e-07
1.984051.5834443.857669e-07
1.994231.5833083.967317e-07
21.5832314.029500e-07
2.004461.5831714.256525e-07
2.014741.5830334.780157e-07
2.025071.5828935.306474e-07
2.035461.5827525.835491e-07
2.045891.582616.367220e-07
2.056391.5824666.901677e-07
2.066931.5823227.438874e-07
2.077531.5821757.978827e-07
2.088191.5820288.521549e-07
2.09891.5818789.067054e-07
2.109661.5817289.615356e-07
2.120481.5815761.016647e-06
2.131361.5814221.072041e-06
2.142291.5812681.127719e-06
2.153271.5811111.183683e-06
2.164321.5809531.239934e-06
2.175421.5807941.296473e-06
2.186571.5806321.353302e-06
2.197791.580471.410423e-06
2.21.5804371.421700e-06
2.209061.5803051.476774e-06
2.220391.5801391.545661e-06
2.231771.5799721.614902e-06
2.243221.5798021.684497e-06
2.254721.5796311.754449e-06
2.266291.5794591.824761e-06
2.277911.5792841.895432e-06
2.289591.5791081.966467e-06
2.301331.578932.037865e-06
2.313141.578752.109630e-06
2.3251.5785682.181762e-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
—