Optical constants

Refractive index of F2HT (SCHOTT)

F2HT: n,k 0.32–2.5 µm

Data
formula 2 + tabulated k
Range
0.32–2.5 µm
Temperature
293 K
Licence
CC0-1.0

Plot

Click the plot to set the calculator wavelength. Note: k data cover 334-2500 nm only; k = 0 elsewhere in the n range 320-2500 nm.

At one wavelength

Range 0.32–2.5 µm
Refractive index n
1.62004
Extinction coefficient k
3.74453e-09
Permittivity ε1
2.62452
Permittivity ε2
1.21326e-08
Absorption coefficient α
0.000800803 cm⁻¹
Penetration depth δ = λ/(2πk)
2.49749e+10 nm
Abbe number Vd
36.366
Chromatic dispersion dn/dλ
-0.0864752 µm⁻¹
Group index ng
1.67085
Group velocity dispersion
168.087 fs²/mm
Dispersion parameter D
-917.002 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

# F2HT (SCHOTT): F2HT
schott_f2ht = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "F2HT", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_f2ht.range_nm)  # (320, 2500) nm
eps = schott_f2ht.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=1.34533359λ2λ2−0.00997743871+0.209073176λ2λ2−0.0470450767+0.937357162λ2λ2−111.886764

Valid from 0.32 to 2.5 µm.

Coefficients as stored
CiValue
C10.0
C21.34533359
C30.00997743871
C40.209073176
C50.0470450767
C60.937357162
C7111.886764

Comments and conditions

lead containing glass type

Conditions

temperature
293 K

Properties

thermal dispersion
type: formula A, coefficients: 1.51e-06 1.56e-08 -2.78e-11 9.34e-07 1.04e-09 0.25
nd
1.62004
Vd
36.37
glass code
620364.360
glass status
standard
density
value: 3599
thermal expansion
value: 8.2e-06, temperature range: 243 343; value: 9.2e-06, temperature range: 293 573
dPgF
0.0002
resistance
acid: 1.0; 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 = 2.13e-06 K⁻¹ at 633 nm, dn/dT = 1.01e-06 K⁻¹ at 1310 nm, dn/dT = 9.24e-07 K⁻¹ at 1550 nm
Notes on the source data (kept exactly as published):
  • k data cover 334-2500 nm only; k = 0 elsewhere in the n range 320-2500 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 421 wavelengths, the same grid as the API and the library
F2HT (SCHOTT), F2HT: n and k versus wavelength
λ (µm)nk
0.321.6960160
0.3216531.6945420
0.3233141.69310
0.3249851.6916880
0.3266631.6903050
0.3283511.6889510
0.3300471.6876250
0.3317521.6863260
0.3334651.6850520
0.3341.6846611.517200e-06
0.3351881.6838041.420183e-06
0.3369191.682581.278756e-06
0.3386591.681381.136599e-06
0.3404091.6802029.937074e-07
0.3421671.6790488.500776e-07
0.3439351.6779147.057059e-07
0.3457111.6768025.605884e-07
0.3474971.6757114.147214e-07
0.3492921.6746392.681008e-07
0.351.6742242.102700e-07
0.3510961.6735871.986345e-07
0.352911.6725541.793857e-07
0.3547331.671541.600375e-07
0.3565651.6705431.405894e-07
0.3584071.6695641.210408e-07
0.3602581.6686011.013912e-07
0.3621191.6676568.164012e-08
0.363991.6667266.178702e-08
0.3651.6662335.106500e-08
0.365871.6658134.821061e-08
0.367761.6649144.200986e-08
0.369661.6640313.577707e-08
0.371.6638753.466000e-08
0.3715691.6631633.266909e-08
0.3734881.6623083.023365e-08
0.3754181.6614682.778562e-08
0.3773571.6606422.532495e-08
0.3793061.6598282.285157e-08
0.381.6595432.197100e-08
0.3812651.6590282.108729e-08
0.3832351.6582411.971184e-08
0.3852141.6574661.832929e-08
0.3872041.6567031.693960e-08
0.3892041.6559521.554274e-08
0.391.6556581.498700e-08
0.3912151.6552131.456477e-08
0.3932361.6544851.386233e-08
0.3952671.6537691.315627e-08
0.3973091.6530631.244656e-08
0.3993611.6523681.173318e-08
0.41.6521551.151100e-08
0.4014241.6516841.118184e-08
0.4034971.651011.070243e-08
0.4051.6505291.035500e-08
0.4055821.6503461.026547e-08
0.4076771.6496919.942920e-09
0.4097821.6490479.618703e-09
0.4118991.6484119.292812e-09
0.4140271.6477858.965238e-09
0.4161651.6471698.635971e-09
0.4183151.6465618.305004e-09
0.421.6460928.045600e-09
0.4204761.6459628.054717e-09
0.4226481.6453718.096324e-09
0.4248311.6447898.138145e-09
0.4270261.6442158.180183e-09
0.4292311.6436498.222438e-09
0.4314491.6430918.264911e-09
0.4336771.6425418.307603e-09
0.4359171.6419988.350516e-09
0.4361.6419788.352100e-09
0.4381691.6414638.260585e-09
0.4404321.6409358.165090e-09
0.4427071.6404158.069102e-09
0.4449941.6399017.972618e-09
0.4472931.6393957.875636e-09
0.4496031.6388957.778152e-09
0.4519261.6384037.680165e-09
0.454261.6379167.581673e-09
0.4566071.6374377.482671e-09
0.4589651.6369637.383158e-09
0.461.6367587.339500e-09
0.4613361.6364967.254071e-09
0.4637191.6360357.101694e-09
0.4661141.635586.948530e-09
0.4685221.6351316.794575e-09
0.4709421.6346886.639825e-09
0.4733751.6342516.484276e-09
0.475821.6338196.327923e-09
0.4782781.6333936.170762e-09
0.4807481.6329736.012790e-09
0.4832321.6325575.854001e-09
0.4857281.6321475.694393e-09
0.4882371.6317425.533959e-09
0.4907591.6313435.372698e-09
0.4932941.6309485.210603e-09
0.4958421.6305585.047671e-09
0.4984031.6301744.883897e-09
0.51.6299374.781800e-09
0.5009781.6297934.754116e-09
0.5035661.6294184.680847e-09
0.5061671.6290474.607200e-09
0.5087811.6286814.533173e-09
0.5114091.628324.458763e-09
0.5140511.6279624.383969e-09
0.5167061.627614.308789e-09
0.5193761.6272614.233220e-09
0.5220581.6269174.157261e-09
0.5247551.6265774.080910e-09
0.5274661.626244.004164e-09
0.530191.6259083.927022e-09
0.5329291.625583.849481e-09
0.5356821.6252563.771540e-09
0.5384491.6249363.693196e-09
0.541231.6246193.614448e-09
0.5440261.6243063.535292e-09
0.5461.6240883.479400e-09
0.5468361.6239973.484729e-09
0.5496611.6236913.502732e-09
0.55251.6233893.520828e-09
0.5553541.6230913.539018e-09
0.5582231.6227963.557301e-09
0.5611061.6225043.575679e-09
0.5640041.6222163.594152e-09
0.5669181.6219313.612721e-09
0.5698461.6216493.631385e-09
0.572791.6213713.650146e-09
0.5757491.6210963.669003e-09
0.5787231.6208233.687958e-09
0.581.6207083.696100e-09
0.5817121.6205543.707009e-09
0.5847171.6202883.726158e-09
0.5877371.6200253.745405e-09
0.5907731.6197653.764751e-09
0.5938251.6195073.784198e-09
0.5968921.6192533.803745e-09
0.5999751.6190013.823393e-09
0.6030741.6187523.843142e-09
0.606191.6185063.862994e-09
0.6093211.6182633.882948e-09
0.6124681.6180223.903005e-09
0.6156321.6177843.923165e-09
0.6188121.6175483.943430e-09
0.621.6174613.951000e-09
0.6220091.6173154.069557e-09
0.6252221.6170854.259203e-09
0.6284511.6168574.449828e-09
0.6316971.6166314.641439e-09
0.634961.6164084.834039e-09
0.638241.6161875.027634e-09
0.6415371.6159685.222229e-09
0.6448511.6157525.417829e-09
0.6481821.6155385.614439e-09
0.651531.6153265.812066e-09
0.6548961.6151176.010712e-09
0.6582781.6149096.210386e-09
0.661.6148056.312000e-09
0.6616791.6147046.234306e-09
0.6650971.6145016.076126e-09
0.6685321.61435.917129e-09
0.6719861.61415.757310e-09
0.6754571.6139035.596666e-09
0.6789461.6137085.435192e-09
0.6824531.6135155.272884e-09
0.6859781.6133245.109738e-09
0.6895211.6131354.945749e-09
0.6930831.6129484.780913e-09
0.6966631.6127624.615225e-09
0.71.6125924.460800e-09
0.7002621.6125784.462469e-09
0.7038791.6123974.485519e-09
0.7075151.6122164.508689e-09
0.711171.6120384.531978e-09
0.7148431.6118614.555388e-09
0.7185361.6116864.578918e-09
0.7222471.6115134.602570e-09
0.7259781.6113424.626345e-09
0.7297281.6111724.650242e-09
0.7334971.6110034.674262e-09
0.7372861.6108364.698407e-09
0.7410951.6106714.722676e-09
0.7449231.6105074.747071e-09
0.7487711.6103454.771592e-09
0.7526391.6101844.796239e-09
0.7565261.6100254.821014e-09
0.7604341.6098674.845916e-09
0.7643621.6097114.870947e-09
0.768311.6095564.896108e-09
0.7722791.6094024.921399e-09
0.7762681.609254.946820e-09
0.7802781.6090994.972372e-09
0.7843091.608954.998057e-09
0.788361.6088015.023874e-09
0.7924321.6086555.049824e-09
0.7965261.6085095.075909e-09
0.800641.6083645.102128e-09
0.8047761.6082215.128483e-09
0.8089331.6080795.154974e-09
0.8131111.6079385.181601e-09
0.8173111.6077985.208367e-09
0.8215331.607665.235270e-09
0.8257771.6075225.262313e-09
0.8300421.6073865.289495e-09
0.834331.6072515.316817e-09
0.838641.6071175.344281e-09
0.8429721.6069845.371887e-09
0.8473261.6068525.399635e-09
0.8517031.6067215.427526e-09
0.8561021.6065915.455562e-09
0.8605241.6064625.483742e-09
0.864971.6063345.512068e-09
0.8694371.6062075.540540e-09
0.8739291.6060815.569160e-09
0.8784431.6059565.597927e-09
0.882981.6058315.626843e-09
0.8875411.6057085.655908e-09
0.8921261.6055865.685123e-09
0.8967341.6054645.714489e-09
0.9013661.6053435.744007e-09
0.9060221.6052245.773677e-09
0.9107021.6051055.803501e-09
0.9154071.6049865.833479e-09
0.9201351.6048695.863611e-09
0.9248881.6047525.893899e-09
0.9296661.6046365.924344e-09
0.9344681.6045215.954946e-09
0.9392951.6044075.985706e-09
0.9441471.6042936.016625e-09
0.9490241.604186.047703e-09
0.9539261.6040686.078942e-09
0.9588531.6039566.110343e-09
0.9638061.6038456.141905e-09
0.9687851.6037356.173631e-09
0.9737891.6036256.205521e-09
0.9788191.6035166.237575e-09
0.9838751.6034086.269795e-09
0.9889571.60336.302181e-09
0.9940661.6031936.334735e-09
0.9992011.6030866.367456e-09
1.004361.602986.400347e-09
1.009551.6028756.433408e-09
1.014761.602776.466639e-09
1.020011.6026656.500042e-09
1.025281.6025626.533618e-09
1.030571.6024586.567367e-09
1.035891.6023556.601290e-09
1.041251.6022536.635389e-09
1.046621.6021516.669664e-09
1.052031.6020496.704116e-09
1.057461.6019486.738745e-09
1.061.6019016.754900e-09
1.062931.6018486.895373e-09
1.068421.6017477.158850e-09
1.073941.6016477.423688e-09
1.079481.6015487.689894e-09
1.085061.6014497.957475e-09
1.090671.601358.226438e-09
1.09631.6012528.496790e-09
1.101961.6011548.768539e-09
1.107651.6010569.041692e-09
1.113381.6009599.316256e-09
1.119131.6008629.592238e-09
1.124911.6007659.869645e-09
1.130721.6006691.014849e-08
1.136561.6005731.042877e-08
1.142431.6004771.071050e-08
1.148331.6003811.099368e-08
1.154261.6002861.127833e-08
1.160231.600191.156444e-08
1.166221.6000961.185204e-08
1.172241.6000011.214112e-08
1.17831.5999061.243169e-08
1.184381.5998121.272377e-08
1.19051.5997181.301735e-08
1.196651.5996241.331245e-08
1.202831.599531.360907e-08
1.209051.5994361.390723e-08
1.215291.5993431.420693e-08
1.221571.5992491.450817e-08
1.227881.5991561.481097e-08
1.234221.5990631.511534e-08
1.24061.598971.542127e-08
1.2471.5988761.572879e-08
1.253451.5987831.603790e-08
1.259921.5986911.634860e-08
1.266431.5985981.666091e-08
1.272971.5985051.697483e-08
1.279551.5984121.729037e-08
1.286161.5983191.760754e-08
1.29281.5982261.792635e-08
1.299481.5981341.824681e-08
1.306191.5980411.856892e-08
1.312941.5979481.889270e-08
1.319721.5978551.921815e-08
1.326541.5977621.954528e-08
1.333391.5976691.987410e-08
1.340281.5975762.020462e-08
1.34721.5974832.053684e-08
1.354161.597392.087079e-08
1.361151.5972962.120645e-08
1.368181.5972032.154385e-08
1.375251.5971092.188300e-08
1.382351.5970152.222389e-08
1.38951.5969212.256655e-08
1.396671.5968272.291097e-08
1.403891.5967332.325718e-08
1.411141.5966392.360517e-08
1.418431.5965442.395496e-08
1.425761.5964492.430656e-08
1.433121.5963542.465998e-08
1.440521.5962592.501522e-08
1.447961.5961642.537229e-08
1.455441.5960682.573121e-08
1.462961.5959722.609198e-08
1.470521.5958762.645462e-08
1.478111.5957792.681913e-08
1.485751.5956822.718552e-08
1.493421.5955852.755381e-08
1.501141.5954882.792400e-08
1.508891.595392.829610e-08
1.516691.5952922.867012e-08
1.524521.5951932.904607e-08
1.531.5951252.930900e-08
1.53241.5950953.195931e-08
1.540311.5949954.071575e-08
1.548271.5948964.951742e-08
1.556271.5947965.836456e-08
1.56431.5946966.725739e-08
1.572381.5945957.619617e-08
1.580511.5944938.518111e-08
1.588671.5943929.421247e-08
1.596881.594291.032905e-07
1.605131.5941871.124154e-07
1.613421.5940841.215874e-07
1.621751.593981.308068e-07
1.630131.5938761.400739e-07
1.638551.5937721.493888e-07
1.647011.5936661.587518e-07
1.655521.5935611.681632e-07
1.664071.5934541.776232e-07
1.672671.5933481.871320e-07
1.681311.593241.966900e-07
1.689991.5931322.062974e-07
1.698721.5930242.159544e-07
1.70751.5929142.256612e-07
1.716321.5928052.354182e-07
1.725181.5926942.452256e-07
1.734091.5925832.550837e-07
1.743051.5924712.649927e-07
1.752061.5923582.749529e-07
1.761111.5922452.849645e-07
1.77021.5921312.950278e-07
1.779351.5920163.051431e-07
1.788541.5919013.153107e-07
1.797781.5917853.255308e-07
1.807061.5916683.358037e-07
1.81641.591553.461296e-07
1.825781.5914313.565089e-07
1.835211.5913123.669418e-07
1.844691.5911923.774286e-07
1.854221.5910713.879695e-07
1.86381.5909493.985649e-07
1.873421.5908264.092151e-07
1.88311.5907024.199202e-07
1.892831.5905784.306807e-07
1.902611.5904524.414967e-07
1.912431.5903254.523686e-07
1.922311.5901984.632967e-07
1.932241.590074.742812e-07
1.942221.589944.853224e-07
1.952261.589814.964207e-07
1.962341.5896785.075763e-07
1.971.5895785.160500e-07
1.972481.5895465.242939e-07
1.982671.5894125.582111e-07
1.992911.5892775.923036e-07
2.00321.5891426.265721e-07
2.013551.5890056.610177e-07
2.023951.5888676.956412e-07
2.03441.5887287.304435e-07
2.044911.5885887.654256e-07
2.055481.5884468.005884e-07
2.066091.5883038.359328e-07
2.076771.5881598.714598e-07
2.087491.5880149.071704e-07
2.098281.5878689.430653e-07
2.109111.587729.791457e-07
2.120011.5875711.015413e-06
2.130961.5874211.051867e-06
2.141971.5872691.088509e-06
2.153031.5871161.125341e-06
2.164151.5869621.162363e-06
2.175331.5868061.199576e-06
2.186571.5866491.236981e-06
2.197861.586491.274580e-06
2.209221.586331.312373e-06
2.220631.5861691.350361e-06
2.23211.5860061.388545e-06
2.243631.5858411.426927e-06
2.255221.5856751.465506e-06
2.266871.5855071.504285e-06
2.278581.5853381.543265e-06
2.290351.5851671.582445e-06
2.302181.5849941.621829e-06
2.314071.584821.661415e-06
2.3251.5846591.697800e-06
2.326021.5846441.703547e-06
2.338041.5844661.771030e-06
2.350121.5842871.838862e-06
2.362251.5841061.907045e-06
2.374461.5839231.975579e-06
2.386721.5837382.044468e-06
2.399051.5835512.113712e-06
2.411441.5833622.183314e-06
2.42391.5831722.253276e-06
2.436421.582982.323599e-06
2.449011.5827852.394285e-06
2.461661.5825892.465336e-06
2.474371.582392.536755e-06
2.487151.582192.608542e-06
2.51.5819882.680700e-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
—