Optical constants

Refractive index of LITHOTEC-CAF2 (obsolete) (SCHOTT)

LITHOTEC-CAF2 (obsolete): n,k 0.25–2.5 µm

Data
formula 2 + tabulated k
Range
0.25–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength.

At one wavelength

Range 0.25–2.5 µm
Refractive index n
1.43385
Extinction coefficient k
1.87131e-09
Permittivity ε1
2.05592
Permittivity ε2
5.36633e-09
Absorption coefficient α
0.000400196 cm⁻¹
Penetration depth δ = λ/(2πk)
4.99755e+10 nm
Abbe number Vd
95.233
Chromatic dispersion dn/dλ
-0.0235735 µm⁻¹
Group index ng
1.4477
Group velocity dispersion
41.2597 fs²/mm
Dispersion parameter D
-225.094 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

# LITHOTEC-CAF2 (obsolete) (SCHOTT): LITHOTEC-CAF2 (obsolete)
mat = ls.fetch_refractiveindex("specs", "SCHOTT-misc", "LITHOTEC-CAF2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(mat.range_nm)  # (250, 2500) nm
eps = mat.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=0.617617011λ2λ2−0.00275381936+0.421117656λ2λ2−0.0105900875+3.79711183λ2λ2−1182.67444

Valid from 0.25 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C20.617617011
C30.00275381936
C40.421117656
C50.0105900875
C63.79711183
C71182.67444

Comments and conditions

obsolet

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: -3.18e-05 -2.31e-08 4.13e-11 3.35e-07 1.91e-10 0.192
nd
1.43385
Vd
95.23
glass code
434952.318
glass status
preferred
density
value: 3180
thermal expansion
value: 1.841e-05, temperature range: 243 343; value: 2.128e-05, temperature range: 293 573
dPgF
0.0552
resistance
acid: 4.5; stain: 0.0; alkali: 2.3; climatic: 1.0; phosphate: 1.3

Thermo-optic coefficient

  • Schott thermal-dispersion model (reference temperature 293.0 K): dn/dT = -1.13e-05 K⁻¹ at 633 nm, dn/dT = -1.15e-05 K⁻¹ at 1310 nm, dn/dT = -1.15e-05 K⁻¹ at 1550 nm

References

Cite

SCHOTT Zemax catalog 2017-01-20b (obtained from http://www.schott.com); See also SCHOTT 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 428 wavelengths, the same grid as the API and the library
LITHOTEC-CAF2 (obsolete) (SCHOTT), LITHOTEC-CAF2 (obsolete): n and k versus wavelength
λ (µm)nk
0.251.4672811.593100e-09
0.2514471.466761.602331e-09
0.2529021.4662471.611616e-09
0.2543661.4657411.620954e-09
0.2558381.4652431.630347e-09
0.2573191.4647531.639793e-09
0.2588081.4642691.649295e-09
0.261.4638891.656900e-09
0.2603061.4637931.658848e-09
0.2618121.4633241.668445e-09
0.2633281.4628611.678097e-09
0.2648521.4624051.687805e-09
0.2663841.4619561.697569e-09
0.2679261.4615131.707390e-09
0.2694771.4610761.717268e-09
0.271.4609311.720600e-09
0.2710361.4606461.727202e-09
0.2726051.4602221.737195e-09
0.2741831.4598041.747245e-09
0.275771.4593921.757353e-09
0.2773661.4589861.767520e-09
0.2789711.4585851.777745e-09
0.281.4583331.784300e-09
0.2805861.458191.788030e-09
0.2822091.4578011.798374e-09
0.2838431.4574171.808779e-09
0.2854861.4570391.819243e-09
0.2871381.4566651.829768e-09
0.28881.4562971.840354e-09
0.291.4560361.848000e-09
0.2904711.4559341.851006e-09
0.2921521.4555761.861731e-09
0.2938431.4552231.872519e-09
0.2955441.4548751.883369e-09
0.2972541.4545321.894282e-09
0.2989751.4541931.905258e-09
0.31.4539951.911800e-09
0.3007051.4538591.916290e-09
0.3024451.453531.927376e-09
0.3041961.4532051.938526e-09
0.3059561.4528841.949741e-09
0.3077271.4525681.961021e-09
0.3095081.4522561.972366e-09
0.311.4521711.975500e-09
0.3112991.4519481.983776e-09
0.3131011.4516451.995253e-09
0.3149131.4513452.006796e-09
0.3167361.451052.018406e-09
0.3185691.4507582.030083e-09
0.321.4505342.039200e-09
0.3204121.450472.041828e-09
0.3222671.4501862.053643e-09
0.3241321.4499062.065527e-09
0.3260081.449632.077479e-09
0.3278951.4493572.089501e-09
0.3297921.4490882.101592e-09
0.3317011.4488222.113753e-09
0.3336211.448562.125985e-09
0.3341.4485092.128400e-09
0.3355521.4483022.138293e-09
0.3374941.4480462.150673e-09
0.3394471.4477942.163125e-09
0.3414121.4475462.175649e-09
0.3433881.44732.188246e-09
0.3453751.4470582.200916e-09
0.3473741.4468192.213658e-09
0.3493841.4465832.226475e-09
0.351.4465112.230400e-09
0.3514061.446352.239364e-09
0.353441.446122.252326e-09
0.3554861.4458932.265363e-09
0.3575431.4456692.278475e-09
0.3596121.4454482.291663e-09
0.3616941.4452292.304928e-09
0.3637871.4450132.318270e-09
0.3651.444892.326000e-09
0.3658931.4448012.331694e-09
0.368011.444592.345205e-09
0.371.4443962.357900e-09
0.370141.4443832.358792e-09
0.3722821.4441782.372438e-09
0.3744371.4439762.386163e-09
0.3766041.4437762.399967e-09
0.3787841.4435792.413851e-09
0.381.443472.421600e-09
0.3809761.4433842.427816e-09
0.3831811.4431922.441861e-09
0.3853981.4430022.455988e-09
0.3876291.4428152.470196e-09
0.3898721.4426292.484487e-09
0.391.4426192.485300e-09
0.3921291.4424472.498860e-09
0.3943981.4422662.513317e-09
0.3966811.4420882.527857e-09
0.3989771.4419122.542482e-09
0.41.4418342.549000e-09
0.4012861.4417382.557203e-09
0.4036081.4415662.572021e-09
0.4051.4414642.580900e-09
0.4059441.4413962.586918e-09
0.4082941.4412292.601891e-09
0.4106571.4410632.616952e-09
0.4130331.44092.632099e-09
0.4154241.4407382.647334e-09
0.4178281.4405792.662658e-09
0.421.4404372.676500e-09
0.4202461.4404212.678069e-09
0.4226791.4402662.693559e-09
0.4251251.4401122.709139e-09
0.4275851.439962.724809e-09
0.430061.439812.740569e-09
0.4325491.4396622.756421e-09
0.4350521.4395152.772365e-09
0.4361.4394612.778400e-09
0.437571.4393712.788410e-09
0.4401031.4392282.804555e-09
0.442651.4390872.820793e-09
0.4452121.4389472.837125e-09
0.4477881.4388092.853551e-09
0.450381.4386732.870073e-09
0.4529871.4385392.886690e-09
0.4556081.4384062.903403e-09
0.4582451.4382742.920213e-09
0.461.4381882.931400e-09
0.4608971.4381452.901360e-09
0.4635651.4380162.812060e-09
0.4662481.437892.722243e-09
0.4689461.4377642.631906e-09
0.471661.4376412.541046e-09
0.474391.4375182.449660e-09
0.4771361.4373972.357745e-09
0.4798971.4372782.265298e-09
0.4826741.437162.172317e-09
0.4854681.4370432.078797e-09
0.4882781.4369281.984736e-09
0.4911041.4368141.890130e-09
0.4939461.4367011.794977e-09
0.4968051.436591.699273e-09
0.499681.436481.603016e-09
0.51.4364671.592300e-09
0.5025721.4363711.600491e-09
0.5054811.4362631.609754e-09
0.5084061.4361571.619071e-09
0.5113481.4360521.628442e-09
0.5143081.4359481.637868e-09
0.5172851.4358451.647347e-09
0.5202781.4357431.656882e-09
0.5232891.4356431.666472e-09
0.5263181.4355441.676117e-09
0.5293641.4354461.685819e-09
0.5324281.4353491.695576e-09
0.5355091.4352531.705390e-09
0.5386091.4351581.715260e-09
0.5417261.4350641.725188e-09
0.5448611.4349711.735173e-09
0.5461.4349381.738800e-09
0.5480151.4348791.745217e-09
0.5511861.4347891.755320e-09
0.5543761.4346991.765481e-09
0.5575851.434611.775701e-09
0.5608121.4345221.785980e-09
0.5640581.4344351.796319e-09
0.5673221.434351.806717e-09
0.5706061.4342651.817176e-09
0.5739081.4341811.827695e-09
0.577231.4340981.838275e-09
0.581.4340291.847100e-09
0.580571.4340151.848916e-09
0.583931.4339341.859618e-09
0.587311.4338541.870382e-09
0.5907091.4337741.881208e-09
0.5941281.4336951.892097e-09
0.5975661.4336171.903049e-09
0.6010251.433541.914064e-09
0.6045031.4334641.925143e-09
0.6080021.4333891.936286e-09
0.6115211.4333141.947494e-09
0.615061.433241.958766e-09
0.618621.4331671.970104e-09
0.621.4331391.974500e-09
0.62221.4330951.981507e-09
0.6258011.4330231.992976e-09
0.6294231.4329522.004512e-09
0.6330661.4328822.016114e-09
0.636731.4328122.027784e-09
0.6404151.4327442.039521e-09
0.6441211.4326762.051326e-09
0.6478491.4326082.063199e-09
0.6515991.4325422.075141e-09
0.655371.4324762.087153e-09
0.6591631.432412.099233e-09
0.661.4323962.101900e-09
0.6629781.4323452.111384e-09
0.6668151.4322812.123605e-09
0.6706741.4322182.135897e-09
0.6745561.4321552.148259e-09
0.678461.4320932.160694e-09
0.6823861.4320312.173200e-09
0.6863361.431972.185779e-09
0.6903081.431912.198430e-09
0.6943031.431852.211155e-09
0.6983211.4317912.223953e-09
0.71.4317662.229300e-09
0.7023631.4317322.236825e-09
0.7064281.4316742.249771e-09
0.7105161.4316162.262792e-09
0.7146291.4315592.275888e-09
0.7187651.4315022.289060e-09
0.7229241.4314462.302308e-09
0.7271081.431392.315633e-09
0.7313171.4313352.329035e-09
0.7355491.4312812.342514e-09
0.7398061.4312262.356072e-09
0.7440881.4311732.369708e-09
0.7483941.431122.383422e-09
0.7527261.4310672.397217e-09
0.7570821.4310142.411091e-09
0.7614641.4309632.425045e-09
0.7658711.4309112.439080e-09
0.7703031.430862.453197e-09
0.7747621.430812.467395e-09
0.7792461.4307592.481675e-09
0.7837561.430712.496038e-09
0.7882921.430662.510484e-09
0.7928541.4306112.525014e-09
0.7974431.4305632.539627e-09
0.8020581.4305152.554326e-09
0.80671.4304672.569109e-09
0.8113691.4304192.583978e-09
0.8160641.4303722.598933e-09
0.8207881.4303252.613975e-09
0.8255381.4302792.629103e-09
0.8303161.4302332.644319e-09
0.8351211.4301872.659624e-09
0.8399551.4301422.675016e-09
0.8448161.4300972.690498e-09
0.8497051.4300522.706070e-09
0.8546231.4300082.721731e-09
0.8595691.4299632.737484e-09
0.8645441.4299192.753327e-09
0.8695481.4298762.769262e-09
0.874581.4298332.785290e-09
0.8796421.429792.801410e-09
0.8847331.4297472.817623e-09
0.8898531.4297042.833930e-09
0.8950031.4296622.850332e-09
0.9001831.429622.866828e-09
0.9053931.4295782.883420e-09
0.9106331.4295372.900108e-09
0.9159041.4294962.916893e-09
0.9212041.4294552.933775e-09
0.9265361.4294142.950754e-09
0.9318981.4293732.967832e-09
0.9372921.4293332.985009e-09
0.9427171.4292933.002285e-09
0.9481731.4292533.019661e-09
0.953661.4292133.037137e-09
0.959181.4291733.054715e-09
0.9647311.4291343.072394e-09
0.9703141.4290953.090176e-09
0.975931.4290563.108061e-09
0.9815781.4290173.126049e-09
0.9872591.4289783.144141e-09
0.9929731.428943.162338e-09
0.998721.4289013.180640e-09
1.00451.4288633.199049e-09
1.010311.4288253.217563e-09
1.016161.4287873.236185e-09
1.022041.4287493.254915e-09
1.027961.4287113.273753e-09
1.033911.4286743.292700e-09
1.039891.4286363.311757e-09
1.045911.4285993.330924e-09
1.051961.4285623.350202e-09
1.058051.4285243.369592e-09
1.061.4285133.375800e-09
1.064171.4284873.389093e-09
1.070331.428453.408708e-09
1.076531.4284133.428436e-09
1.082761.4283773.448278e-09
1.089021.428343.468235e-09
1.095331.4283033.488307e-09
1.101671.4282673.508496e-09
1.108041.428233.528801e-09
1.114461.4281943.549224e-09
1.120911.4281573.569765e-09
1.127391.4281213.590425e-09
1.133921.4280843.611205e-09
1.140481.4280483.632105e-09
1.147081.4280123.653126e-09
1.153721.4279763.674268e-09
1.16041.4279393.695533e-09
1.167111.4279033.716921e-09
1.173871.4278673.738433e-09
1.180661.4278313.760069e-09
1.187491.4277943.781830e-09
1.194371.4277583.803718e-09
1.201281.4277223.825732e-09
1.208231.4276863.847873e-09
1.215231.4276493.870143e-09
1.222261.4276133.892542e-09
1.229331.4275773.915070e-09
1.236451.4275413.937728e-09
1.24361.4275043.960518e-09
1.25081.4274683.983439e-09
1.258041.4274314.006494e-09
1.265321.4273954.029681e-09
1.272641.4273584.053003e-09
1.280011.4273214.076460e-09
1.287421.4272854.100053e-09
1.294871.4272484.123782e-09
1.302361.4272114.147648e-09
1.30991.4271744.171653e-09
1.317481.4271374.195796e-09
1.325111.42714.220080e-09
1.332781.4270634.244503e-09
1.340491.4270254.269069e-09
1.348251.4269884.293776e-09
1.356051.426954.318626e-09
1.36391.4269134.343620e-09
1.371791.4268754.368759e-09
1.379731.4268374.394043e-09
1.387721.4267994.419474e-09
1.395751.4267614.445052e-09
1.403831.4267224.470778e-09
1.411951.4266844.496652e-09
1.420121.4266454.522677e-09
1.428341.4266064.548852e-09
1.436611.4265674.575179e-09
1.444921.4265284.601658e-09
1.453291.4264894.628290e-09
1.46171.4264494.655076e-09
1.470161.426414.682018e-09
1.478671.426374.709115e-09
1.487221.426334.736369e-09
1.495831.4262894.763781e-09
1.504491.4262494.791351e-09
1.513191.4262084.819081e-09
1.521951.4261674.846972e-09
1.531.4261294.872600e-09
1.530761.4261264.875024e-09
1.539621.4260854.903237e-09
1.548531.4260434.931613e-09
1.557491.4260014.960154e-09
1.566511.4259594.988860e-09
1.575571.4259165.017732e-09
1.584691.4258745.046771e-09
1.593861.4258315.075978e-09
1.603091.4257885.105354e-09
1.612371.4257445.134900e-09
1.62171.4257015.164618e-09
1.631081.4256575.194507e-09
1.640521.4256125.224569e-09
1.650021.4255685.254805e-09
1.659571.4255235.285216e-09
1.669171.4254785.315803e-09
1.678831.4254325.346568e-09
1.688551.4253865.377510e-09
1.698321.425345.408631e-09
1.708151.4252935.439933e-09
1.718041.4252465.471415e-09
1.727981.4251995.503080e-09
1.737981.4251525.534928e-09
1.748041.4251045.566960e-09
1.758161.4250555.599178e-09
1.768331.4250075.631582e-09
1.778571.4249585.664174e-09
1.788861.4249085.696955e-09
1.799211.4248585.729925e-09
1.809631.4248085.763086e-09
1.82011.4247575.796439e-09
1.830631.4247065.829984e-09
1.841231.4246555.863725e-09
1.851891.4246035.897660e-09
1.86261.424555.931792e-09
1.873381.4244975.966121e-09
1.884231.4244446.000649e-09
1.895131.424396.035377e-09
1.90611.4243366.070305e-09
1.917131.4242816.105436e-09
1.928231.4242266.140770e-09
1.939391.4241716.176309e-09
1.950611.4241146.212054e-09
1.96191.4240586.248005e-09
1.971.4240176.273800e-09
1.973251.4240016.284165e-09
1.984671.4239436.320537e-09
1.996161.4238856.357118e-09
2.007711.4238266.393912e-09
2.019331.4237676.430919e-09
2.031021.4237076.468139e-09
2.042781.4236466.505576e-09
2.05461.4235856.543228e-09
2.066491.4235246.581099e-09
2.078451.4234626.619189e-09
2.090481.4233996.657500e-09
2.102581.4233366.696032e-09
2.114751.4232726.734787e-09
2.126991.4232076.773766e-09
2.13931.4231426.812971e-09
2.151681.4230766.852403e-09
2.164131.4230096.892063e-09
2.176661.4229426.931953e-09
2.189251.4228746.972074e-09
2.201921.4228067.012426e-09
2.214671.4227377.053013e-09
2.227481.4226677.093834e-09
2.240381.4225967.134891e-09
2.253341.4225257.176186e-09
2.266381.4224537.217720e-09
2.27951.422387.259495e-09
2.292691.4223077.301511e-09
2.305961.4222337.343770e-09
2.319311.4221587.386274e-09
2.3251.4221267.404400e-09
2.332731.4220827.429023e-09
2.346231.4220057.472017e-09
2.359811.4219287.515260e-09
2.373471.421857.558754e-09
2.387211.4217717.602499e-09
2.401021.4216917.646498e-09
2.414921.421617.690751e-09
2.428891.4215297.735260e-09
2.442951.4214477.780027e-09
2.457091.4213637.825053e-09
2.471311.4212797.870339e-09
2.485611.4211947.915888e-09
2.51.4211087.961700e-09

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
—