Optical constants

Refractive index of QF6 (CDGM)

QF6: n,k 0.365–0.7065 µm

Data
formula 3 + tabulated k
Range
0.365–0.7065 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.365–0.7065 µm
Refractive index n
1.53172
Extinction coefficient k
2.45299e-08
Permittivity ε1
2.34616
Permittivity ε2
7.51458e-08
Absorption coefficient α
0.00524595 cm⁻¹
Penetration depth δ = λ/(2πk)
3.81246e+09 nm
Abbe number Vd
48.756
Chromatic dispersion dn/dλ
-0.0559073 µm⁻¹
Group index ng
1.56457
Group velocity dispersion
102.21 fs²/mm
Dispersion parameter D
-557.608 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

# QF6 (CDGM): QF6
cdgm_qf6 = ls.fetch_refractiveindex("specs", "CDGM-optical", "QF6", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(cdgm_qf6.range_nm)  # (365, 706.5) nm
eps = cdgm_qf6.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

Polynomial (formula 3), λ in µm
n2=2.3044884−0.0083782321⁢λ2.0+0.014424342⁢λ−2.0+0.00033374311⁢λ−4.0−4.4657456×10-6⁢λ−6.0+1.3349929×10-6⁢λ−8.0

Valid from 0.365 to 0.7065 µm.

Coefficients as stored
CiValue
C12.3044884
C2-0.0083782321
C32.0
C40.014424342
C5-2.0
C60.00033374311
C7-4.0
C8-4.4657456e-06
C9-6.0
C101.3349929e-06
C11-8.0

Comments and conditions

Conditions

temperature
293 K

Properties

nd
1.531719
Vd
48.755584
glass code
532488
glass status
preferred
density
value: 2780
thermal expansion
value: 8.2e-06, temperature range: 243 343; value: 9.8e-06, temperature range: 293 573
dPgF
-0.0024

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 413 wavelengths, the same grid as the API and the library
QF6 (CDGM), QF6: n and k versus wavelength
λ (µm)nk
0.3651.5597425.265050e-08
0.3656051.5595755.166486e-08
0.366211.5594085.067759e-08
0.3668171.5592424.968868e-08
0.3674251.5590774.869814e-08
0.3680331.5589124.770595e-08
0.3686431.5587494.671212e-08
0.3692541.5585864.571665e-08
0.3698651.5584244.471952e-08
0.371.5583884.450000e-08
0.3704781.5582624.455751e-08
0.3710921.5581024.463134e-08
0.3717071.5579424.470529e-08
0.3723221.5577834.477937e-08
0.3729391.5576244.485357e-08
0.3735571.5574674.492789e-08
0.3741761.557314.500233e-08
0.3747961.5571544.507690e-08
0.3754161.5569984.515159e-08
0.3760381.5568444.522641e-08
0.3766611.556694.530135e-08
0.3772851.5565364.537641e-08
0.377911.5563844.545160e-08
0.3785361.5562324.552691e-08
0.3791631.5560814.560235e-08
0.3797911.555934.567791e-08
0.381.555884.570300e-08
0.3804211.555784.535666e-08
0.3810511.5556314.483769e-08
0.3816821.5554834.431787e-08
0.3823141.5553354.379718e-08
0.3829481.5551884.327563e-08
0.3835821.5550414.275322e-08
0.3842171.5548954.222994e-08
0.3848541.554754.170580e-08
0.3854911.5546064.118078e-08
0.386131.5544624.065490e-08
0.386771.5543194.012815e-08
0.387411.5541763.960052e-08
0.3880521.5540343.907202e-08
0.3886951.5538933.854264e-08
0.3893391.5537523.801239e-08
0.3899841.5536123.748126e-08
0.391.5536093.746800e-08
0.390631.5534733.712298e-08
0.3912771.5533343.676856e-08
0.3919251.5531963.641355e-08
0.3925741.5530583.605796e-08
0.3932251.5529213.570177e-08
0.3938761.5527853.534500e-08
0.3945291.5526493.498763e-08
0.3951821.5525143.462968e-08
0.3958371.5523793.427112e-08
0.3964931.5522453.391198e-08
0.3971491.5521123.355224e-08
0.3978071.5519793.319190e-08
0.3984661.5518473.283097e-08
0.3991261.5517153.246944e-08
0.3997881.5515843.210731e-08
0.41.5515423.199100e-08
0.400451.5514543.202699e-08
0.4011131.5513243.208006e-08
0.4017781.5511943.213322e-08
0.4024431.5510663.218647e-08
0.403111.5509373.223980e-08
0.4037781.550813.229322e-08
0.4044471.5506823.234673e-08
0.4051171.5505563.240033e-08
0.4057881.550433.245402e-08
0.406461.5503043.250780e-08
0.4071331.5501793.256167e-08
0.4078081.5500553.261562e-08
0.4084831.5499313.266967e-08
0.409161.5498073.272380e-08
0.4098381.5496843.277803e-08
0.4105171.5495623.283234e-08
0.4111971.549443.288674e-08
0.4118781.5493193.294124e-08
0.412561.5491983.299582e-08
0.4132441.5490783.305050e-08
0.4139281.5489583.310526e-08
0.4146141.5488383.316012e-08
0.4153011.548723.321507e-08
0.4159891.5486013.327010e-08
0.4166781.5484833.332523e-08
0.4173681.5483663.338045e-08
0.418061.5482493.343577e-08
0.4187521.5481333.349117e-08
0.4194461.5480173.354667e-08
0.421.5479253.359100e-08
0.4201411.5479023.360225e-08
0.4208371.5477873.365789e-08
0.4215341.5476723.371363e-08
0.4222321.5475583.376946e-08
0.4229321.5474453.382538e-08
0.4236321.5473323.388139e-08
0.4243341.5472193.393750e-08
0.4250371.5471073.399370e-08
0.4257411.5469963.404999e-08
0.4264461.5468843.410638e-08
0.4271531.5467743.416286e-08
0.427861.5466633.421943e-08
0.4285691.5465543.427610e-08
0.4292791.5464443.433286e-08
0.429991.5463353.438972e-08
0.4307031.5462273.444667e-08
0.4314161.5461193.450371e-08
0.4321311.5460113.456085e-08
0.4328471.5459043.461808e-08
0.4335641.5457973.467541e-08
0.4342821.5456913.473283e-08
0.4350011.5455853.479035e-08
0.4357221.545483.484796e-08
0.4364441.5453753.490567e-08
0.4371671.545273.496347e-08
0.4378911.5451663.502137e-08
0.4386161.5450623.507937e-08
0.4393431.5449593.513746e-08
0.441.5448663.519000e-08
0.4400711.5448563.518260e-08
0.44081.5447543.510620e-08
0.441531.5446523.502967e-08
0.4422611.544553.495302e-08
0.4429941.5444493.487624e-08
0.4437281.5443483.479933e-08
0.4444631.5442473.472229e-08
0.4451991.5441473.464513e-08
0.4459371.5440483.456784e-08
0.4466751.5439483.449042e-08
0.4474151.5438493.441288e-08
0.4481561.5437513.433520e-08
0.4488991.5436533.425740e-08
0.4496431.5435553.417946e-08
0.4503871.5434583.410140e-08
0.4511331.5433613.402321e-08
0.4518811.5432643.394489e-08
0.4526291.5431683.386644e-08
0.4533791.5430723.378786e-08
0.454131.5429773.370915e-08
0.4548831.5428823.363031e-08
0.4556361.5427873.355133e-08
0.4563911.5426933.347223e-08
0.4571471.5425993.339300e-08
0.4579041.5425053.331363e-08
0.4586631.5424123.323414e-08
0.4594231.5423193.315451e-08
0.461.5422493.309400e-08
0.4601841.5422273.307184e-08
0.4609461.5421353.297986e-08
0.461711.5420433.288774e-08
0.4624741.5419513.279546e-08
0.4632411.541863.270302e-08
0.4640081.541773.261044e-08
0.4647771.5416793.251770e-08
0.4655471.5415893.242481e-08
0.4663181.5414993.233176e-08
0.467091.541413.223856e-08
0.4678641.5413213.214520e-08
0.4686391.5412333.205169e-08
0.4694151.5411443.195803e-08
0.4701931.5410563.186421e-08
0.4709721.5409693.177023e-08
0.4717521.5408813.167610e-08
0.4725341.5407943.158182e-08
0.4733161.5407083.148737e-08
0.4741011.5406213.139277e-08
0.4748861.5405353.129802e-08
0.4756731.540453.120310e-08
0.4764611.5403643.110803e-08
0.477251.5402793.101280e-08
0.478041.5401953.091742e-08
0.4788321.540113.082187e-08
0.4796261.5400263.072617e-08
0.481.5399873.068100e-08
0.480421.5399433.062363e-08
0.4812161.5398593.051496e-08
0.4820131.5397763.040610e-08
0.4828121.5396933.029707e-08
0.4836111.5396113.018786e-08
0.4844131.5395293.007846e-08
0.4852151.5394472.996888e-08
0.4860191.5393652.985913e-08
0.4868241.5392842.974919e-08
0.487631.5392032.963906e-08
0.4884381.5391222.952876e-08
0.4892471.5390422.941827e-08
0.4900581.5389622.930760e-08
0.490871.5388822.919675e-08
0.4916831.5388032.908571e-08
0.4924971.5387242.897449e-08
0.4933131.5386452.886308e-08
0.494131.5385662.875149e-08
0.4949491.5384882.863972e-08
0.4957691.538412.852776e-08
0.496591.5383322.841561e-08
0.4974131.5382552.830328e-08
0.4982371.5381782.819077e-08
0.4990621.5381012.807806e-08
0.4998891.5380242.796517e-08
0.51.5380142.795000e-08
0.5007171.5379482.792691e-08
0.5015461.5378722.790020e-08
0.5023771.5377962.787345e-08
0.503211.5377212.784665e-08
0.5040431.5376462.781981e-08
0.5048781.5375712.779292e-08
0.5057141.5374962.776599e-08
0.5065521.5374222.773902e-08
0.5073911.5373482.771200e-08
0.5082321.5372742.768493e-08
0.5090741.53722.765782e-08
0.5099171.5371272.763067e-08
0.5107621.5370542.760347e-08
0.5116081.5369812.757622e-08
0.5124561.5369092.754893e-08
0.5133041.5368362.752160e-08
0.5141551.5367652.749422e-08
0.5150061.5366932.746679e-08
0.515861.5366212.743932e-08
0.5167141.536552.741180e-08
0.517571.5364792.738424e-08
0.5184281.5364092.735663e-08
0.5192861.5363382.732898e-08
0.5201471.5362682.730128e-08
0.5210081.5361982.727353e-08
0.5218711.5361282.724574e-08
0.5227361.5360592.721790e-08
0.5236021.535992.719002e-08
0.5244691.5359212.716209e-08
0.5253381.5358522.713412e-08
0.5262081.5357842.710609e-08
0.527081.5357152.707802e-08
0.5279531.5356472.704991e-08
0.5288281.535582.702175e-08
0.5297041.5355122.699354e-08
0.5305811.5354452.696528e-08
0.531461.5353782.693698e-08
0.5323411.5353112.690863e-08
0.5332221.5352452.688024e-08
0.5341061.5351782.685179e-08
0.5349911.5351122.682330e-08
0.5358771.5350462.679477e-08
0.5367651.5349812.676618e-08
0.5376541.5349162.673755e-08
0.5385441.534852.670887e-08
0.5394371.5347852.668014e-08
0.540331.5347212.665137e-08
0.5412251.5346562.662255e-08
0.5421221.5345922.659368e-08
0.543021.5345282.656476e-08
0.5439191.5344642.653579e-08
0.5448211.5344012.650678e-08
0.5457231.5343372.647772e-08
0.5466271.5342742.644861e-08
0.5475331.5342112.641945e-08
0.548441.5341492.639024e-08
0.5493481.5340862.636099e-08
0.551.5340412.634000e-08
0.5502581.5340242.632757e-08
0.551171.5339622.628369e-08
0.5520831.53392.623973e-08
0.5529971.5338382.619571e-08
0.5539131.5337772.615161e-08
0.5548311.5337162.610743e-08
0.555751.5336552.606319e-08
0.5566711.5335942.601887e-08
0.5575931.5335332.597448e-08
0.5585171.5334732.593001e-08
0.5594421.5334132.588547e-08
0.5603691.5333532.584085e-08
0.5612971.5332932.579617e-08
0.5622271.5332332.575140e-08
0.5631581.5331742.570657e-08
0.5640911.5331152.566166e-08
0.5650251.5330562.561667e-08
0.5659611.5329972.557161e-08
0.5668991.5329392.552648e-08
0.5678381.532882.548127e-08
0.5687791.5328222.543599e-08
0.5697211.5327642.539063e-08
0.5706651.5327062.534519e-08
0.571611.5326492.529969e-08
0.5725571.5325922.525410e-08
0.5735061.5325342.520844e-08
0.5744561.5324772.516271e-08
0.5754071.5324212.511689e-08
0.576361.5323642.507101e-08
0.5773151.5323072.502504e-08
0.5782721.5322512.497900e-08
0.579231.5321952.493289e-08
0.5801891.5321392.488670e-08
0.581151.5320842.484043e-08
0.5821131.5320282.479408e-08
0.5830771.5319732.474766e-08
0.5840431.5319182.470116e-08
0.5850111.5318632.465459e-08
0.585981.5318082.460793e-08
0.5869511.5317532.456120e-08
0.5879231.5316992.451439e-08
0.5888971.5316452.446751e-08
0.5898721.5315912.442055e-08
0.5908491.5315372.437351e-08
0.5918281.5314832.432639e-08
0.5928091.531432.427919e-08
0.5937911.5313762.423191e-08
0.5947741.5313232.418456e-08
0.595761.531272.413713e-08
0.5967471.5312172.408962e-08
0.5977351.5311652.404203e-08
0.5987251.5311122.399436e-08
0.5997171.531062.394662e-08
0.61.5310452.393300e-08
0.6007111.5310082.396135e-08
0.6017061.5309562.400106e-08
0.6027031.5309042.404083e-08
0.6037011.5308522.408067e-08
0.6047011.5308012.412057e-08
0.6057031.530752.416054e-08
0.6067061.5306982.420058e-08
0.6077111.5306472.424068e-08
0.6087181.5305972.428084e-08
0.6097261.5305462.432108e-08
0.6107361.5304952.436138e-08
0.6117481.5304452.440175e-08
0.6127611.5303952.444218e-08
0.6137771.5303452.448269e-08
0.6147931.5302952.452325e-08
0.6158121.5302452.456389e-08
0.6168321.5301962.460459e-08
0.6178541.5301462.464536e-08
0.6188771.5300972.468620e-08
0.6199021.5300482.472711e-08
0.6209291.5299992.476808e-08
0.6219581.5299512.480913e-08
0.6229881.5299022.485023e-08
0.624021.5298532.489141e-08
0.6250541.5298052.493266e-08
0.626091.5297572.497397e-08
0.6271271.5297092.501536e-08
0.6281661.5296612.505681e-08
0.6292061.5296132.509833e-08
0.6302491.5295662.513992e-08
0.6312931.5295192.518157e-08
0.6323381.5294712.522330e-08
0.6333861.5294242.526510e-08
0.6344351.5293772.530696e-08
0.6354861.529332.534890e-08
0.6365391.5292842.539090e-08
0.6375931.5292372.543297e-08
0.638651.5291912.547512e-08
0.6397081.5291452.551733e-08
0.6407671.5290982.555961e-08
0.6418291.5290522.560197e-08
0.6428921.5290072.564439e-08
0.6439571.5289612.568688e-08
0.6450241.5289152.572945e-08
0.6460921.528872.577208e-08
0.6471631.5288252.581478e-08
0.6482351.528782.585756e-08
0.6493081.5287352.590041e-08
0.651.5287062.592800e-08
0.6503841.528692.590033e-08
0.6514611.5286452.582271e-08
0.6525411.52862.574497e-08
0.6536221.5285562.566710e-08
0.6547041.5285122.558909e-08
0.6557891.5284682.551096e-08
0.6568751.5284232.543270e-08
0.6579641.528382.535431e-08
0.6590531.5283362.527579e-08
0.6601451.5282922.519714e-08
0.6612391.5282492.511835e-08
0.6623341.5282052.503944e-08
0.6634311.5281622.496040e-08
0.664531.5281192.488123e-08
0.6656311.5280762.480192e-08
0.6667341.5280332.472249e-08
0.6678381.527992.464292e-08
0.6689451.5279472.456322e-08
0.6700531.5279052.448339e-08
0.6711631.5278632.440342e-08
0.6722751.527822.432333e-08
0.6733881.5277782.424310e-08
0.6745041.5277362.416274e-08
0.6756211.5276942.408224e-08
0.6767411.5276522.400161e-08
0.6778621.5276112.392085e-08
0.6789851.5275692.383995e-08
0.6801091.5275282.375892e-08
0.6812361.5274872.367776e-08
0.6823641.5274452.359646e-08
0.6834951.5274042.351503e-08
0.6846271.5273632.343346e-08
0.6857611.5273232.335176e-08
0.6868971.5272822.326992e-08
0.6880351.5272412.318795e-08
0.6891751.5272012.310584e-08
0.6903171.5271612.302359e-08
0.691461.527122.294121e-08
0.6926061.527082.285869e-08
0.6937531.527042.277603e-08
0.6949021.5272.269324e-08
0.6960531.526962.261031e-08
0.6972061.5269212.252725e-08
0.6983611.5268812.244404e-08
0.6995181.5268422.236070e-08
0.71.5268252.232600e-08
0.7006771.5268022.230434e-08
0.7018381.5267632.226721e-08
0.7031.5267242.223001e-08
0.7041651.5266852.219276e-08
0.7053321.5266462.215544e-08
0.70651.5266072.211807e-08

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
—