Optical constants

Refractive index of H-LAK1 (CDGM)

H-LAK1: 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
1.6595
Extinction coefficient k
4.69952e-08
Permittivity ε1
2.75393
Permittivity ε2
1.55977e-07
Absorption coefficient α
0.0100504 cm⁻¹
Penetration depth δ = λ/(2πk)
1.98998e+09 nm
Abbe number Vd
57.347
Chromatic dispersion dn/dλ
-0.0593288 µm⁻¹
Group index ng
1.69436
Group velocity dispersion
104.832 fs²/mm
Dispersion parameter D
-571.917 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-LAK1 (CDGM): H-LAK1
cdgm_h_lak1 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-LAK1", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_lak1.range_nm)  # (302, 2325) nm
eps = cdgm_h_lak1.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=0.964886701λ2λ2−91.193933+0.468480585λ2λ2−0.0205810529+1.23722796λ2λ2−0.00608509423

Valid from 0.302 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C20.964886701
C391.193933
C40.468480585
C50.0205810529
C61.23722796
C70.00608509423

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -5.01e-06 2.49e-08 -4.65e-11 5.72e-07 -7.93e-10 0.06
nd
1.659500
Vd
57.347260
glass code
660574
density
value: 3940
thermal expansion
value: 7.7e-06, temperature range: 243 343; value: 8.7e-06, temperature range: 293 573
dPgF
-0.0021
resistance
climatic: 4.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -1.88e-06 K⁻¹ at 633 nm, dn/dT = -2.42e-06 K⁻¹ at 1310 nm, dn/dT = -2.46e-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-LAK1 (CDGM), H-LAK1: n and k versus wavelength
λ (µm)nk
0.3021.7116415.144640e-06
0.3035491.7108344.871770e-06
0.3051061.7100384.597501e-06
0.306671.7092534.321826e-06
0.3082431.7084794.044736e-06
0.3098241.7077153.766226e-06
0.311.7076313.735200e-06
0.3114131.7069623.555586e-06
0.313011.7062193.352549e-06
0.3146151.7054863.148470e-06
0.3162291.7047632.943345e-06
0.317851.704052.737167e-06
0.3194811.7033462.529933e-06
0.321.7031252.463900e-06
0.3211191.7026522.363868e-06
0.3227661.7019672.216655e-06
0.3244211.7012912.068687e-06
0.3260851.7006251.919960e-06
0.3277571.6999671.770470e-06
0.3294381.6993171.620214e-06
0.331.6991031.570000e-06
0.3311281.6986761.501772e-06
0.3328261.6980441.399036e-06
0.3345331.697421.295774e-06
0.3362491.6968041.191982e-06
0.3379731.6961961.087657e-06
0.3397061.6955959.827978e-07
0.341.6954959.650300e-07
0.3414481.6950039.102582e-07
0.34321.6944188.440429e-07
0.344961.693847.774881e-07
0.3467291.693277.105919e-07
0.3485071.6927076.433527e-07
0.351.6922425.869000e-07
0.3502941.6921525.804036e-07
0.3520911.6916035.407587e-07
0.3538971.6910615.009104e-07
0.3557121.6905264.608578e-07
0.3575361.6899984.205998e-07
0.3593691.6894763.801353e-07
0.361.6892993.662200e-07
0.3612121.6889613.488781e-07
0.3630651.6884523.223820e-07
0.3649271.687952.957500e-07
0.3667981.6874532.689815e-07
0.368681.6869632.420757e-07
0.371.6866242.231900e-07
0.370571.6864792.189441e-07
0.3724711.6860012.047969e-07
0.3743811.6855281.905772e-07
0.3763011.6850621.762846e-07
0.3782311.6846011.619187e-07
0.381.6841851.487500e-07
0.3801711.6841451.480434e-07
0.382121.6836961.399735e-07
0.384081.6832511.318623e-07
0.386051.6828121.237094e-07
0.388031.6823781.155148e-07
0.391.6819541.073600e-07
0.390021.681951.073135e-07
0.392021.6815261.026120e-07
0.394031.6811089.788633e-08
0.3960511.6806949.313646e-08
0.3980821.6802858.836223e-08
0.41.6799068.385500e-08
0.4001241.6798828.373259e-08
0.4021761.6794838.170713e-08
0.4042391.6790887.967127e-08
0.4063121.6786997.762497e-08
0.4083961.6783137.556818e-08
0.410491.6779337.350084e-08
0.4125951.6775577.142290e-08
0.4147111.6771856.933430e-08
0.4168381.6768176.723499e-08
0.4189761.6764546.512492e-08
0.421.6762826.411400e-08
0.4211251.6760956.388471e-08
0.4232841.675746.344433e-08
0.4254551.6753896.300170e-08
0.4276371.6750426.255680e-08
0.429831.6746996.210962e-08
0.4320351.674366.166015e-08
0.434251.6740256.120837e-08
0.4364771.6736936.075427e-08
0.4387161.6733666.029784e-08
0.441.673186.003600e-08
0.4409661.6730425.980846e-08
0.4432271.6727225.927565e-08
0.44551.6724055.874011e-08
0.4477851.6720925.820182e-08
0.4500821.6717825.766077e-08
0.452391.6714765.711695e-08
0.454711.6711735.657033e-08
0.4570421.6708745.602092e-08
0.4593861.6705785.546868e-08
0.461.6705015.532400e-08
0.4617421.6702855.485875e-08
0.464111.6699955.422624e-08
0.466491.6697095.359049e-08
0.4688831.6694265.295148e-08
0.4712871.6691455.230920e-08
0.4737041.6688685.166361e-08
0.4761341.6685945.101472e-08
0.4785751.6683235.036250e-08
0.481.6681674.998200e-08
0.481031.6680554.967450e-08
0.4834971.667794.893786e-08
0.4859761.6675274.819744e-08
0.4884691.6672674.745323e-08
0.4909741.6670114.670520e-08
0.4934921.6667574.595334e-08
0.4960231.6665054.519762e-08
0.4985671.6662564.443802e-08
0.51.6661184.401000e-08
0.5011231.666014.400951e-08
0.5036931.6657674.400837e-08
0.5062771.6655264.400724e-08
0.5088731.6652884.400610e-08
0.5114831.6650524.400495e-08
0.5141061.6648184.400379e-08
0.5167431.6645874.400263e-08
0.5193931.6643594.400147e-08
0.5220561.6641334.400030e-08
0.5247341.6639094.399912e-08
0.5274251.6636874.399793e-08
0.530131.6634684.399674e-08
0.5328491.6632514.399555e-08
0.5355811.6630364.399434e-08
0.5383281.6628244.399314e-08
0.5410891.6626134.399192e-08
0.5438641.6624054.399070e-08
0.5466531.6621994.398947e-08
0.5494571.6619954.398824e-08
0.551.6619564.398800e-08
0.5522751.6617934.416992e-08
0.5551071.6615934.439645e-08
0.5579541.6613954.462414e-08
0.5608151.6611994.485300e-08
0.5636911.6610054.508304e-08
0.5665821.6608134.531425e-08
0.5694881.6606224.554665e-08
0.5724091.6604344.578024e-08
0.5753441.6602474.601503e-08
0.5782951.6600634.625103e-08
0.5812611.659884.648823e-08
0.5842421.6596994.672665e-08
0.5872381.6595194.696630e-08
0.590251.6593424.720717e-08
0.5932771.6591664.744928e-08
0.5963191.6589914.769263e-08
0.5993781.6588194.793722e-08
0.61.6587844.798700e-08
0.6024521.6586484.818308e-08
0.6055411.6584784.843019e-08
0.6086471.658314.867857e-08
0.6117681.6581444.892822e-08
0.6149061.657984.917916e-08
0.6180591.6578164.943138e-08
0.6212291.6576554.968489e-08
0.6244151.6574954.993971e-08
0.6276171.6573365.019583e-08
0.6308361.6571795.045326e-08
0.6340711.6570235.071202e-08
0.6373231.6568695.097210e-08
0.6405921.6567165.123352e-08
0.6438771.6565645.149628e-08
0.6471791.6564145.176038e-08
0.651.6562875.198600e-08
0.6504981.6562655.196981e-08
0.6538341.6561175.186139e-08
0.6571871.6559715.175241e-08
0.6605581.6558265.164287e-08
0.6639451.6556825.153277e-08
0.6673511.6555395.142211e-08
0.6707731.6553985.131088e-08
0.6742131.6552585.119907e-08
0.6776711.6551195.108670e-08
0.6811461.6549815.097375e-08
0.684641.6548455.086021e-08
0.6881511.6547095.074610e-08
0.691681.6545755.063140e-08
0.6952271.6544425.051612e-08
0.6987931.654315.040024e-08
0.71.6542655.036100e-08
0.7023761.6541795.037937e-08
0.7059791.6540495.040721e-08
0.7095991.653925.043520e-08
0.7132381.6537925.046333e-08
0.7168961.6536655.049161e-08
0.7205731.6535395.052003e-08
0.7242681.6534145.054859e-08
0.7279831.653295.057731e-08
0.7317161.6531675.060617e-08
0.7354691.6530455.063517e-08
0.7392411.6529245.066433e-08
0.7430321.6528045.069364e-08
0.7468431.6526845.072309e-08
0.7506731.6525665.075270e-08
0.7545231.6524485.078246e-08
0.7583921.6523325.081237e-08
0.7622821.6522165.084244e-08
0.7661911.6521015.087266e-08
0.770121.6519865.090303e-08
0.774071.6518735.093356e-08
0.778041.651765.096425e-08
0.782031.6516495.099509e-08
0.7860411.6515375.102609e-08
0.7900721.6514275.105726e-08
0.7941241.6513175.108858e-08
0.7981961.6512085.112006e-08
0.81.6511615.113400e-08
0.802291.65115.003373e-08
0.8064051.6509934.805685e-08
0.810541.6508864.606983e-08
0.8146971.650784.407262e-08
0.8188751.6506744.206517e-08
0.8230751.6505694.004742e-08
0.8272961.6504653.801933e-08
0.8315391.6503623.598083e-08
0.8358031.6502593.393188e-08
0.840091.6501563.187242e-08
0.8443981.6500542.980240e-08
0.8487291.6499532.772176e-08
0.851.6499242.711100e-08
0.8530821.6498532.632380e-08
0.8574571.6497522.520615e-08
0.8618541.6496532.408277e-08
0.8662741.6495542.295363e-08
0.8707171.6494552.181870e-08
0.8751821.6493572.067794e-08
0.8796711.649261.953134e-08
0.8841821.6491631.837886e-08
0.8887171.6490661.722046e-08
0.8932741.648971.605613e-08
0.8978561.6488741.488582e-08
0.91.648831.433800e-08
0.902461.6487791.437722e-08
0.9070881.6486841.445099e-08
0.9117411.648591.452514e-08
0.9164161.6484961.459968e-08
0.9211161.6484031.467459e-08
0.925841.6483091.474989e-08
0.9305881.6482171.482558e-08
0.9353611.6481241.490165e-08
0.9401581.6480321.497812e-08
0.944981.647941.505497e-08
0.9498261.6478491.513222e-08
0.951.6478461.513500e-08
0.9546971.6477581.520978e-08
0.9595931.6476671.528772e-08
0.9645151.6475771.536607e-08
0.9694611.6474871.544482e-08
0.9744331.6473971.552397e-08
0.979431.6473071.560353e-08
0.9844531.6472181.568350e-08
0.9895021.6471291.576387e-08
0.9945771.647041.584466e-08
0.9996781.6469511.592587e-08
11.6469461.593100e-08
1.00481.6468631.600755e-08
1.009961.6467751.608966e-08
1.015141.6466871.617219e-08
1.020341.6465991.625514e-08
1.025581.6465111.633851e-08
1.030841.6464241.642232e-08
1.036121.6463371.650655e-08
1.041441.6462491.659122e-08
1.046781.6461621.667632e-08
1.052151.6460761.676185e-08
1.057541.6459891.684783e-08
1.061.645951.688700e-08
1.062971.6459021.693425e-08
1.068421.6458161.702113e-08
1.07391.6457291.710844e-08
1.07941.6456431.719621e-08
1.084941.6455571.728443e-08
1.09051.6454711.737309e-08
1.09611.6453851.746222e-08
1.101721.6452991.755180e-08
1.107371.6452131.764184e-08
1.113051.6451271.773234e-08
1.118761.6450411.782330e-08
1.124491.6449551.791474e-08
1.130261.6448691.800664e-08
1.136061.6447831.809901e-08
1.141881.6446971.819185e-08
1.147741.644611.828518e-08
1.153621.6445241.837898e-08
1.159541.6444381.847326e-08
1.165491.6443521.856802e-08
1.171471.6442661.866328e-08
1.177471.6441791.875902e-08
1.183511.6440931.885525e-08
1.189581.6440061.895197e-08
1.195681.643921.904919e-08
1.21.6438591.911800e-08
1.201811.6438331.914690e-08
1.207981.6437461.924509e-08
1.214171.6436591.934377e-08
1.22041.6435721.944297e-08
1.226661.6434851.954267e-08
1.232951.6433971.964289e-08
1.239271.6433091.974361e-08
1.245631.6432211.984486e-08
1.252021.6431331.994662e-08
1.258441.6430452.004891e-08
1.264891.6429572.015172e-08
1.271381.6428682.025506e-08
1.27791.6427792.035893e-08
1.284451.642692.046333e-08
1.291041.64262.056826e-08
1.297661.642512.067374e-08
1.304321.642422.077975e-08
1.311011.642332.088631e-08
1.317731.6422392.099342e-08
1.324491.6421482.110107e-08
1.331281.6420572.120928e-08
1.338111.6419662.131804e-08
1.344971.6418742.142736e-08
1.351871.6417812.153724e-08
1.35881.6416892.164769e-08
1.365771.6415962.175870e-08
1.372771.6415022.187028e-08
1.379811.6414082.198243e-08
1.386891.6413142.209515e-08
1.3941.641222.220846e-08
1.41.641142.230400e-08
1.401151.6411242.232235e-08
1.408341.6410292.243682e-08
1.415561.6409332.255187e-08
1.422821.6408372.266752e-08
1.430121.640742.278376e-08
1.437451.6406422.290060e-08
1.444821.6405442.301803e-08
1.452231.6404462.313607e-08
1.459681.6403472.325472e-08
1.467171.6402482.337397e-08
1.474691.6401482.349383e-08
1.482251.6400472.361431e-08
1.489861.6399462.373541e-08
1.49751.6398442.385712e-08
1.505181.6397422.397946e-08
1.51291.6396392.410243e-08
1.520651.6395362.422603e-08
1.528451.6394312.435027e-08
1.536291.6393272.447514e-08
1.544171.6392212.460065e-08
1.552091.6391152.472680e-08
1.560051.6390082.485360e-08
1.568051.6389012.498105e-08
1.576091.6387932.510916e-08
1.584181.6386842.523792e-08
1.59231.6385742.536735e-08
1.61.638472.549000e-08
1.600471.6384642.563162e-08
1.608671.6383532.812329e-08
1.616921.6382413.062773e-08
1.625221.6381283.314502e-08
1.633551.6380153.567522e-08
1.641931.63793.821840e-08
1.650351.6377854.077461e-08
1.658811.6376694.334394e-08
1.667321.6375534.592645e-08
1.675871.6374354.852219e-08
1.684471.6373165.113126e-08
1.693111.6371975.375370e-08
1.701791.6370765.638959e-08
1.710521.6369555.903900e-08
1.719291.6368336.170200e-08
1.728111.636716.437865e-08
1.736971.6365856.706903e-08
1.745881.636466.977321e-08
1.754831.6363347.249126e-08
1.763831.6362077.522325e-08
1.772881.6360797.796924e-08
1.781971.6359498.072932e-08
1.791111.6358198.350356e-08
1.81.6356928.620300e-08
1.800291.6356888.652426e-08
1.809531.6355559.663869e-08
1.818811.6354211.068050e-07
1.828131.6352861.170234e-07
1.837511.635151.272943e-07
1.846931.6350131.376178e-07
1.856411.6348751.479943e-07
1.865931.6347351.584239e-07
1.87551.6345951.689071e-07
1.885111.6344531.794440e-07
1.894781.6343091.900350e-07
1.90451.6341652.006803e-07
1.914271.6340192.113802e-07
1.924081.6338722.221349e-07
1.933951.6337232.329448e-07
1.943871.6335732.438102e-07
1.953841.6334222.547312e-07
1.963861.6332692.657083e-07
1.973931.6331152.767417e-07
1.984051.632962.878317e-07
1.994231.6328032.989785e-07
21.6327133.053000e-07
2.004461.6326443.255523e-07
2.014741.6324843.722641e-07
2.025071.6323234.192155e-07
2.035461.6321594.664077e-07
2.045891.6319955.138419e-07
2.056391.6318295.615193e-07
2.066931.6316616.094413e-07
2.077531.6314916.576090e-07
2.088191.631327.060238e-07
2.09891.6311477.546869e-07
2.109661.6309738.035995e-07
2.120481.6307968.527630e-07
2.131361.6306189.021786e-07
2.142291.6304399.518477e-07
2.153271.6302571.001771e-06
2.164321.6300731.051951e-06
2.175421.6298881.102388e-06
2.186571.6297011.153084e-06
2.197791.6295121.204040e-06
2.21.6294741.214100e-06
2.209061.6293211.363000e-06
2.220391.6291281.549247e-06
2.231771.6289321.736448e-06
2.243221.6287351.924609e-06
2.254721.6285362.113736e-06
2.266291.6283352.303832e-06
2.277911.6281322.494903e-06
2.289591.6279262.686954e-06
2.301331.6277192.879990e-06
2.313141.6275093.074016e-06
2.3251.6272973.269038e-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
—