Optical constants

Refractive index of F2 (SCHOTT)

F2: 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

# F2 (SCHOTT): F2
schott_f2 = ls.fetch_refractiveindex("specs", "SCHOTT-optical", "F2", ref="c5c2f188e848453def5970e347399d653df2ffc2")
print(schott_f2.range_nm)  # (320, 2500) nm
eps = schott_f2.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
F2 (SCHOTT), F2: 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
0.3341.6846611.654200e-06
0.3351881.6838041.551953e-06
0.3369191.682581.402901e-06
0.3386591.681381.253080e-06
0.3404091.6802021.102485e-06
0.3421671.6790489.511113e-07
0.3439351.6779147.989561e-07
0.3457111.6768026.460150e-07
0.3474971.6757114.922839e-07
0.3492921.6746393.377586e-07
0.351.6742242.768100e-07
0.3510961.6735872.635672e-07
0.352911.6725542.416595e-07
0.3547331.671542.196386e-07
0.3565651.6705431.975040e-07
0.3584071.6695641.752550e-07
0.3602581.6686011.528911e-07
0.3621191.6676561.304117e-07
0.363991.6667261.078161e-07
0.3651.6662339.561300e-08
0.365871.6658139.165652e-08
0.367761.6649148.306165e-08
0.369661.6640317.442238e-08
0.371.6638757.287400e-08
0.3715691.6631636.859517e-08
0.3734881.6623086.336095e-08
0.3754181.6614685.809969e-08
0.3773571.6606425.281126e-08
0.3793061.6598284.749551e-08
0.381.6595434.560300e-08
0.3812651.6590284.348773e-08
0.3832351.6582414.019545e-08
0.3852141.6574663.688616e-08
0.3872041.6567033.355978e-08
0.3892041.6559523.021622e-08
0.391.6556582.888600e-08
0.3912151.6552132.771466e-08
0.3932361.6544852.576599e-08
0.3952671.6537692.380725e-08
0.3973091.6530632.183840e-08
0.3993611.6523681.985937e-08
0.41.6521551.924300e-08
0.4014241.6516841.856703e-08
0.4034971.651011.758250e-08
0.4051.6505291.686900e-08
0.4055821.6503461.668361e-08
0.4076771.6496911.601572e-08
0.4097821.6490471.534437e-08
0.4118991.6484111.466956e-08
0.4140271.6477851.399126e-08
0.4161651.6471691.330946e-08
0.4183151.6465611.262414e-08
0.421.6460921.208700e-08
0.4204761.6459621.201746e-08
0.4226481.6453711.170008e-08
0.4248311.6447891.138106e-08
0.4270261.6442151.106039e-08
0.4292311.6436491.073807e-08
0.4314491.6430911.041409e-08
0.4336771.6425411.008843e-08
0.4359171.6419989.761083e-09
0.4361.6419789.749000e-09
0.4381691.6414639.664299e-09
0.4404321.6409359.575915e-09
0.4427071.6404159.487074e-09
0.4449941.6399019.397775e-09
0.4472931.6393959.308014e-09
0.4496031.6388959.217789e-09
0.4519261.6384039.127099e-09
0.454261.6379169.035940e-09
0.4566071.6374378.944310e-09
0.4589651.6369638.852207e-09
0.461.6367588.811800e-09
0.4613361.6364968.677195e-09
0.4637191.6360358.437105e-09
0.4661141.635588.195775e-09
0.4685221.6351317.953198e-09
0.4709421.6346887.709368e-09
0.4733751.6342517.464279e-09
0.475821.6338197.217924e-09
0.4782781.6333936.970296e-09
0.4807481.6329736.721390e-09
0.4832321.6325576.471197e-09
0.4857281.6321476.219712e-09
0.4882371.6317425.966928e-09
0.4907591.6313435.712838e-09
0.4932941.6309485.457436e-09
0.4958421.6305585.200715e-09
0.4984031.6301744.942667e-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
1.062931.6018487.048333e-09
1.068421.6017477.598708e-09
1.073941.6016478.151926e-09
1.079481.6015488.708002e-09
1.085061.6014499.266950e-09
1.090671.601359.828785e-09
1.09631.6012521.039352e-08
1.101961.6011541.096118e-08
1.107651.6010561.153176e-08
1.113381.6009591.210530e-08
1.119131.6008621.268179e-08
1.124911.6007651.326127e-08
1.130721.6006691.384374e-08
1.136561.6005731.442921e-08
1.142431.6004771.501772e-08
1.148331.6003811.560926e-08
1.154261.6002861.620385e-08
1.160231.600191.680152e-08
1.166221.6000961.740228e-08
1.172241.6000011.800613e-08
1.17831.5999061.861311e-08
1.184381.5998121.922322e-08
1.19051.5997181.983649e-08
1.196651.5996242.045292e-08
1.202831.599532.107254e-08
1.209051.5994362.169535e-08
1.215291.5993432.232139e-08
1.221571.5992492.295066e-08
1.227881.5991562.358317e-08
1.234221.5990632.421896e-08
1.24061.598972.485803e-08
1.2471.5988762.550040e-08
1.253451.5987832.614609e-08
1.259921.5986912.679511e-08
1.266431.5985982.744749e-08
1.272971.5985052.810324e-08
1.279551.5984122.876237e-08
1.286161.5983192.942491e-08
1.29281.5982263.009087e-08
1.299481.5981343.076027e-08
1.306191.5980413.143313e-08
1.312941.5979483.210947e-08
1.319721.5978553.278929e-08
1.326541.5977623.347263e-08
1.333391.5976693.415950e-08
1.340281.5975763.484992e-08
1.34721.5974833.554390e-08
1.354161.597393.624147e-08
1.361151.5972963.694264e-08
1.368181.5972033.764744e-08
1.375251.5971093.835587e-08
1.382351.5970153.906797e-08
1.38951.5969213.978374e-08
1.396671.5968274.050321e-08
1.403891.5967334.122639e-08
1.411141.5966394.195332e-08
1.418431.5965444.268399e-08
1.425761.5964494.341844e-08
1.433121.5963544.415669e-08
1.440521.5962594.489874e-08
1.447961.5961644.564464e-08
1.455441.5960684.639438e-08
1.462961.5959724.714800e-08
1.470521.5958764.790551e-08
1.478111.5957794.866693e-08
1.485751.5956824.943228e-08
1.493421.5955855.020159e-08
1.501141.5954885.097488e-08
1.508891.595395.175215e-08
1.516691.5952925.253344e-08
1.524521.5951935.331877e-08
1.531.5951255.386800e-08
1.53241.5950955.809497e-08
1.540311.5949957.206059e-08
1.548271.5948968.609836e-08
1.556271.5947961.002086e-07
1.56431.5946961.143918e-07
1.572381.5945951.286482e-07
1.580511.5944931.429783e-07
1.588671.5943921.573824e-07
1.596881.594291.718609e-07
1.605131.5941871.864142e-07
1.613421.5940842.010426e-07
1.621751.593982.157466e-07
1.630131.5938762.305266e-07
1.638551.5937722.453829e-07
1.647011.5936662.603160e-07
1.655521.5935612.753262e-07
1.664071.5934542.904139e-07
1.672671.5933483.055796e-07
1.681311.593243.208236e-07
1.689991.5931323.361463e-07
1.698721.5930243.515482e-07
1.70751.5929143.670297e-07
1.716321.5928053.825911e-07
1.725181.5926943.982329e-07
1.734091.5925834.139555e-07
1.743051.5924714.297593e-07
1.752061.5923584.456448e-07
1.761111.5922454.616123e-07
1.77021.5921314.776623e-07
1.779351.5920164.937952e-07
1.788541.5919015.100114e-07
1.797781.5917855.263114e-07
1.807061.5916685.426956e-07
1.81641.591555.591644e-07
1.825781.5914315.757183e-07
1.835211.5913125.923577e-07
1.844691.5911926.090831e-07
1.854221.5910716.258948e-07
1.86381.5909496.427934e-07
1.873421.5908266.597793e-07
1.88311.5907026.768529e-07
1.892831.5905786.940147e-07
1.902611.5904527.112652e-07
1.912431.5903257.286047e-07
1.922311.5901987.460339e-07
1.932241.590077.635530e-07
1.942221.589947.811627e-07
1.952261.589817.988633e-07
1.962341.5896788.166554e-07
1.971.5895788.301700e-07
1.972481.5895468.439116e-07
1.982671.5894129.004474e-07
1.992911.5892779.572752e-07
2.00321.5891421.014397e-06
2.013551.5890051.071813e-06
2.023951.5888671.129526e-06
2.03441.5887281.187537e-06
2.044911.5885881.245848e-06
2.055481.5884461.304460e-06
2.066091.5883031.363375e-06
2.076771.5881591.422594e-06
2.087491.5880141.482119e-06
2.098281.5878681.541951e-06
2.109111.587721.602093e-06
2.120011.5875711.662545e-06
2.130961.5874211.723310e-06
2.141971.5872691.784388e-06
2.153031.5871161.845782e-06
2.164151.5869621.907493e-06
2.175331.5868061.969522e-06
2.186571.5866492.031873e-06
2.197861.586492.094545e-06
2.209221.586332.157541e-06
2.220631.5861692.220862e-06
2.23211.5860062.284510e-06
2.243631.5858412.348488e-06
2.255221.5856752.412795e-06
2.266871.5855072.477435e-06
2.278581.5853382.542409e-06
2.290351.5851672.607718e-06
2.302181.5849942.673365e-06
2.314071.584822.739351e-06
2.3251.5846592.800000e-06
2.326021.5846442.808258e-06
2.338041.5844662.905222e-06
2.350121.5842873.002688e-06
2.362251.5841063.100657e-06
2.374461.5839233.199133e-06
2.386721.5837383.298116e-06
2.399051.5835513.397612e-06
2.411441.5833623.497621e-06
2.42391.5831723.598147e-06
2.436421.582983.699192e-06
2.449011.5827853.800759e-06
2.461661.5825893.902850e-06
2.474371.582394.005469e-06
2.487151.582194.108618e-06
2.51.5819884.212300e-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
—