Optical constants

Refractive index of H-KF6 (CDGM)

H-KF6: 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
1.51742
Extinction coefficient k
1.98319e-08
Permittivity ε1
2.30256
Permittivity ε2
6.01866e-08
Absorption coefficient α
0.00424123 cm⁻¹
Penetration depth δ = λ/(2πk)
4.71561e+09 nm
Abbe number Vd
52.149
Chromatic dispersion dn/dλ
-0.050926 µm⁻¹
Group index ng
1.54734
Group velocity dispersion
91.3306 fs²/mm
Dispersion parameter D
-498.257 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-KF6 (CDGM): H-KF6
cdgm_h_kf6 = ls.fetch_refractiveindex("specs", "CDGM-optical", "H-KF6", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_h_kf6.range_nm)  # (365, 2325) nm
eps = cdgm_h_kf6.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=0.0736995941λ2λ2−0.0478548878+1.19277164λ2λ2−0.00781132706+1.01749455λ2λ2−104.241959

Valid from 0.365 to 2.325 µm.

Coefficients as stored
CiValue
C10.0
C20.0736995941
C30.0478548878
C41.19277164
C50.00781132706
C61.01749455
C7104.241959

Comments and conditions

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -5.94e-07 1.77e-08 -1.13e-10 5.53e-07 9.82e-10 0.212
nd
1.517420
Vd
52.149249
glass code
517522
density
value: 2470
thermal expansion
value: 7e-06, temperature range: 243 343; value: 8.8e-06, temperature range: 293 573
dPgF
0.0022
resistance
climatic: 1.0

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = 4.11e-07 K⁻¹ at 633 nm, dn/dT = -1.10e-07 K⁻¹ at 1310 nm, dn/dT = -1.50e-07 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-KF6 (CDGM), H-KF6: n and k versus wavelength
λ (µm)nk
0.3651.5429753.874500e-07
0.3666981.5425433.295199e-07
0.3684031.5421172.713203e-07
0.371.5417252.168400e-07
0.3701171.5416972.158586e-07
0.3718381.5412832.014097e-07
0.3735681.5408741.868937e-07
0.3753061.540471.723101e-07
0.3770511.5400731.576587e-07
0.3788051.539681.429391e-07
0.381.5394171.329100e-07
0.3805671.5392931.303714e-07
0.3823371.5389111.224461e-07
0.3841161.5385341.144840e-07
0.3859021.5381611.064848e-07
0.3876971.5377949.844839e-08
0.38951.5374319.037462e-08
0.391.5373328.813800e-08
0.3913121.5370738.586433e-08
0.3931321.536728.271042e-08
0.3949611.5363717.954184e-08
0.3967981.5360277.635853e-08
0.3986441.5356877.316041e-08
0.41.535447.081000e-08
0.4004981.5353517.047391e-08
0.4023611.5350196.921621e-08
0.4042321.5346926.795266e-08
0.4061121.5343686.668323e-08
0.4080011.5340496.540789e-08
0.4098991.5337336.412663e-08
0.4118061.5334216.283940e-08
0.4137211.5331136.154619e-08
0.4156451.5328096.024696e-08
0.4175791.5325085.894169e-08
0.4195211.5322115.763035e-08
0.421.5321395.730700e-08
0.4214721.5319185.672238e-08
0.4234331.5316285.594400e-08
0.4254021.5313415.516200e-08
0.4273811.5310585.437637e-08
0.4293691.5307785.358708e-08
0.4313661.5305015.279411e-08
0.4333721.5302285.199746e-08
0.4353881.5299575.119710e-08
0.4374131.529695.039302e-08
0.4394481.5294264.958520e-08
0.441.5293554.936600e-08
0.4414921.5291654.870380e-08
0.4435451.5289064.779235e-08
0.4456091.5286514.687665e-08
0.4476811.5283994.595670e-08
0.4497641.5281494.503246e-08
0.4518561.5279024.410393e-08
0.4539571.5276584.317107e-08
0.4560691.5274174.223388e-08
0.458191.5271784.129233e-08
0.461.5269774.048900e-08
0.4603211.5269424.039332e-08
0.4624621.5267093.975570e-08
0.4646131.5264783.911512e-08
0.4667751.5262493.847155e-08
0.4689461.5260233.782499e-08
0.4711271.52583.717542e-08
0.4733181.5255793.652283e-08
0.475521.525363.586721e-08
0.4777321.5251433.520853e-08
0.4799541.5249293.454680e-08
0.481.5249253.453300e-08
0.4821861.5247183.381345e-08
0.4844291.5245083.307523e-08
0.4866821.52433.233357e-08
0.4889461.5240953.158847e-08
0.491221.5238923.083990e-08
0.4935051.5236913.008785e-08
0.49581.5234922.933230e-08
0.4981071.5232952.857324e-08
0.51.5231362.795000e-08
0.5004231.5231012.789910e-08
0.5027511.5229082.761927e-08
0.5050891.5227172.733814e-08
0.5074391.5225282.705571e-08
0.5097991.5223412.677195e-08
0.512171.5221562.648688e-08
0.5145531.5219722.620049e-08
0.5169461.5217912.591276e-08
0.519351.5216112.562369e-08
0.5217661.5214342.533328e-08
0.5241931.5212572.504152e-08
0.5266311.5210832.474840e-08
0.5290811.520912.445391e-08
0.5315421.520742.415806e-08
0.5340141.520572.386083e-08
0.5364981.5204032.356222e-08
0.5389931.5202372.326222e-08
0.54151.5200722.296082e-08
0.5440191.5199092.265803e-08
0.5465491.5197482.235382e-08
0.5490921.5195882.204820e-08
0.551.5195322.193900e-08
0.5516461.519432.184678e-08
0.5542121.5192732.170298e-08
0.5567891.5191182.155852e-08
0.5593791.5189642.141339e-08
0.5619811.5188122.126758e-08
0.5645951.5186612.112109e-08
0.5672211.5185122.097393e-08
0.5698591.5183632.082607e-08
0.572511.5182172.067754e-08
0.5751731.5180712.052830e-08
0.5778481.5179272.037838e-08
0.5805361.5177842.022776e-08
0.5832361.5176432.007643e-08
0.5859491.5175021.992441e-08
0.5886751.5173631.977167e-08
0.5914131.5172261.961823e-08
0.5941641.5170891.946407e-08
0.5969271.5169541.930920e-08
0.5997041.516821.915360e-08
0.61.5168061.913700e-08
0.6024931.5166871.921653e-08
0.6052961.5165551.930593e-08
0.6081111.5164241.939574e-08
0.610941.5162951.948597e-08
0.6137811.5161661.957662e-08
0.6166361.5160391.966769e-08
0.6195041.5159131.975919e-08
0.6223861.5157881.985111e-08
0.6252811.5156631.994346e-08
0.6281891.515542.003623e-08
0.6311111.5154182.012944e-08
0.6340471.5152972.022308e-08
0.6369961.5151772.031716e-08
0.6399591.5150582.041168e-08
0.6429351.514942.050663e-08
0.6459261.5148232.060203e-08
0.648931.5147072.069787e-08
0.651.5146662.073200e-08
0.6519491.5145912.057627e-08
0.6549811.5144772.033392e-08
0.6580281.5143642.009044e-08
0.6610881.5142511.984583e-08
0.6641631.5141391.960008e-08
0.6672521.5140291.935319e-08
0.6703561.5139191.910515e-08
0.6734741.513811.885595e-08
0.6766071.5137011.860560e-08
0.6797541.5135941.835408e-08
0.6829151.5134871.810139e-08
0.6860921.5133811.784753e-08
0.6892831.5132761.759249e-08
0.6924891.5131721.733626e-08
0.695711.5130691.707884e-08
0.6989461.5129661.682022e-08
0.71.5129331.673600e-08
0.7021971.5128641.664831e-08
0.7054631.5127631.651795e-08
0.7087451.5126621.638700e-08
0.7120411.5125621.625543e-08
0.7153531.5124631.612325e-08
0.7186811.5123641.599045e-08
0.7220231.5122671.585704e-08
0.7253821.512171.572301e-08
0.7287561.5120731.558835e-08
0.7321461.5119771.545307e-08
0.7355511.5118821.531716e-08
0.7389721.5117871.518062e-08
0.7424091.5116931.504344e-08
0.7458631.51161.490562e-08
0.7493321.5115071.476716e-08
0.7528171.5114151.462806e-08
0.7563191.5113241.448831e-08
0.7598371.5112331.434791e-08
0.7633711.5111421.420686e-08
0.7669221.5110521.406515e-08
0.7704891.5109631.392279e-08
0.7740731.5108741.377976e-08
0.7776731.5107861.363606e-08
0.781291.5106981.349170e-08
0.7849241.5106111.334666e-08
0.7885751.5105241.320096e-08
0.7922431.5104381.305457e-08
0.7959281.5103521.290750e-08
0.799631.5102671.275975e-08
0.81.5102581.274500e-08
0.803351.5101821.279840e-08
0.8070861.5100971.285796e-08
0.810841.5100131.291780e-08
0.8146121.509931.297791e-08
0.8184011.5098471.303831e-08
0.8222081.5097641.309899e-08
0.8260321.5096821.315995e-08
0.8298741.50961.322119e-08
0.8337341.5095181.328272e-08
0.8376121.5094371.334454e-08
0.8415081.5093571.340664e-08
0.8454221.5092761.346903e-08
0.8493551.5091961.353171e-08
0.851.5091831.354200e-08
0.8533051.5091171.359462e-08
0.8572741.5090371.365781e-08
0.8612621.5089591.372129e-08
0.8652681.508881.378506e-08
0.8692921.5088021.384913e-08
0.8733361.5087241.391350e-08
0.8773981.5086461.397817e-08
0.8814791.5085691.404315e-08
0.8855791.5084921.410842e-08
0.8896981.5084151.417399e-08
0.8938361.5083391.423988e-08
0.8979941.5082621.430606e-08
0.91.5082261.433800e-08
0.9021711.5081861.437260e-08
0.9063671.5081111.443949e-08
0.9105831.5080351.450669e-08
0.9148181.507961.457420e-08
0.9190731.5078851.464203e-08
0.9233481.5078111.471017e-08
0.9276431.5077361.477863e-08
0.9319581.5076621.484741e-08
0.9362931.5075881.491651e-08
0.9406481.5075141.498593e-08
0.9450231.507441.505567e-08
0.9494191.5073671.512573e-08
0.951.5073571.513500e-08
0.9538351.5072941.519605e-08
0.9582711.507221.526668e-08
0.9627291.5071481.533764e-08
0.9672071.5070751.540893e-08
0.9717051.5070021.548055e-08
0.9762251.506931.555250e-08
0.9807661.5068571.562479e-08
0.9853281.5067851.569742e-08
0.9899111.5067131.577038e-08
0.9945151.5066411.584368e-08
0.9991411.5065691.591732e-08
11.5065561.593100e-08
1.003791.5064971.599136e-08
1.008461.5064261.606575e-08
1.013151.5063541.614049e-08
1.017861.5062831.621558e-08
1.022591.5062111.629101e-08
1.027351.506141.636680e-08
1.032131.5060691.644293e-08
1.036931.5059971.651943e-08
1.041751.5059261.659628e-08
1.04661.5058551.667348e-08
1.051471.5057841.675105e-08
1.056361.5057131.682897e-08
1.061.505661.688700e-08
1.061271.5056421.690726e-08
1.066211.5055711.698593e-08
1.071171.50551.706496e-08
1.076151.5054291.714435e-08
1.081151.5053581.722412e-08
1.086181.5052871.730426e-08
1.091241.5052161.738477e-08
1.096311.5051451.746565e-08
1.101411.5050741.754691e-08
1.106531.5050031.762855e-08
1.111681.5049321.771057e-08
1.116851.5048611.779297e-08
1.122051.5047891.787576e-08
1.127271.5047181.795892e-08
1.132511.5046471.804248e-08
1.137781.5045751.812642e-08
1.143071.5045041.821076e-08
1.148391.5044321.829549e-08
1.153731.504361.838061e-08
1.159091.5042891.846612e-08
1.164481.5042171.855204e-08
1.16991.5041451.863835e-08
1.175341.5040721.872507e-08
1.180811.5041.881219e-08
1.18631.5039281.889971e-08
1.191821.5038551.898764e-08
1.197361.5037821.907598e-08
1.21.5037481.911800e-08
1.202931.5037091.916472e-08
1.208531.5036361.925385e-08
1.214151.5035631.934340e-08
1.21981.503491.943336e-08
1.225471.5034161.952374e-08
1.231171.5033431.961454e-08
1.23691.5032691.970577e-08
1.242651.5031941.979742e-08
1.248431.503121.988949e-08
1.254241.5030451.998199e-08
1.260071.5029712.007493e-08
1.265931.5028962.016829e-08
1.271821.502822.026209e-08
1.277741.5027452.035633e-08
1.283681.5026692.045101e-08
1.289651.5025932.054612e-08
1.295651.5025172.064168e-08
1.301671.502442.073768e-08
1.307731.5023632.083413e-08
1.313811.5022862.093103e-08
1.319921.5022082.102837e-08
1.326061.5021312.112617e-08
1.332231.5020532.122443e-08
1.338431.5019742.132314e-08
1.344651.5018962.142231e-08
1.350911.5018162.152195e-08
1.357191.5017372.162204e-08
1.36351.5016572.172260e-08
1.369851.5015772.182363e-08
1.376221.5014972.192513e-08
1.382621.5014162.202711e-08
1.389051.5013352.212955e-08
1.395511.5012532.223247e-08
1.41.5011962.230400e-08
1.4021.5011712.233588e-08
1.408521.5010892.243976e-08
1.415071.5010062.254412e-08
1.421661.5009232.264897e-08
1.428271.5008392.275431e-08
1.434911.5007552.286014e-08
1.441591.500672.296646e-08
1.448291.5005852.307328e-08
1.455031.50052.318059e-08
1.46181.5004142.328840e-08
1.468591.5003272.339671e-08
1.475431.5002412.350553e-08
1.482291.5001532.361485e-08
1.489181.5000652.372468e-08
1.496111.4999772.383503e-08
1.503071.4998882.394588e-08
1.510061.4997992.405725e-08
1.517081.4997092.416914e-08
1.524141.4996182.428155e-08
1.531231.4995272.439448e-08
1.538351.4994352.450794e-08
1.545511.4993432.462193e-08
1.55271.499252.473644e-08
1.559921.4991572.485149e-08
1.567171.4990632.496707e-08
1.574461.4989682.508319e-08
1.581791.4988732.519985e-08
1.589141.4987772.531706e-08
1.596541.4986812.543481e-08
1.61.4986362.549000e-08
1.603961.4985842.697804e-08
1.611421.4984862.978059e-08
1.618921.4983883.259618e-08
1.626451.4982893.542487e-08
1.634011.4981893.826672e-08
1.641611.4980884.112178e-08
1.649251.4979874.399013e-08
1.656921.4978854.687181e-08
1.664631.4977834.976690e-08
1.672371.4976795.267546e-08
1.680151.4975755.559754e-08
1.687961.497475.853322e-08
1.695811.4973656.148255e-08
1.70371.4972586.444560e-08
1.711631.4971516.742243e-08
1.719591.4970437.041311e-08
1.727591.4969347.341769e-08
1.735621.4968247.643626e-08
1.743691.4967147.946886e-08
1.751811.4966038.251557e-08
1.759951.496498.557645e-08
1.768141.4963778.865157e-08
1.776361.4962649.174099e-08
1.784631.4961499.484478e-08
1.792931.4960339.796301e-08
1.81.4959341.006200e-07
1.801271.4959161.016084e-07
1.809641.4957991.081472e-07
1.818061.495681.147165e-07
1.826521.4955611.213163e-07
1.835011.4954411.279468e-07
1.843551.4953191.346081e-07
1.852121.4951971.413004e-07
1.860741.4950731.480239e-07
1.869391.4949491.547786e-07
1.878091.4948241.615648e-07
1.886821.4946971.683825e-07
1.89561.494571.752319e-07
1.904421.4944411.821132e-07
1.913281.4943111.890265e-07
1.922181.4941811.959719e-07
1.931121.4940492.029497e-07
1.94011.4939162.099599e-07
1.949121.4937822.170027e-07
1.958191.4936472.240782e-07
1.96731.493512.311867e-07
1.976451.4933722.383283e-07
1.985641.4932342.455030e-07
1.994881.4930942.527112e-07
21.4930162.567100e-07
2.004161.4929522.824961e-07
2.013481.492813.403479e-07
2.022841.4926663.984688e-07
2.032251.4925214.568600e-07
2.04171.4923755.155228e-07
2.05121.4922275.744585e-07
2.060741.4920786.336683e-07
2.070331.4919286.931535e-07
2.079961.4917767.529154e-07
2.089631.4916238.129552e-07
2.099351.4914698.732744e-07
2.109121.4913139.338741e-07
2.118931.4911569.947556e-07
2.128781.4909971.055920e-06
2.138681.4908371.117370e-06
2.148631.4906761.179105e-06
2.158621.4905131.241127e-06
2.168671.4903481.303438e-06
2.178751.4901821.366038e-06
2.188891.4900141.428930e-06
2.199071.4898451.492114e-06
2.21.489831.497900e-06
2.20931.4896741.542768e-06
2.219571.4895021.592366e-06
2.22991.4893281.642195e-06
2.240271.4891521.692255e-06
2.250691.4889751.742549e-06
2.261161.4887961.793076e-06
2.271671.4886151.843838e-06
2.282241.4884331.894836e-06
2.292861.4882481.946072e-06
2.303521.4880621.997545e-06
2.314241.4878742.049259e-06
2.3251.4876852.101212e-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
—