# this file is part of refractiveindex.info database
# refractiveindex.info database is in the public domain
# copyright and related rights waived via CC0 1.0

REFERENCES: |
    P. A. Kawka and R. O. Buckius.
    Optical properties of polyimide films in the infrared.
    <a href="https://doi.org/10.1023/A:1010797620483"><i>Int. J. Thermophys.</i> <b>22</b>, 517–534 (2001)</a>
COMMENTS: |
    Fourier transform infrared (FTIR) spectroscopy is used to measure the bidirectional reflectivity of polyimide films on gold substrates in the infrared. The optical constants of cured polyimide are determined in the infrared region using a Lorentz model to characterize the absorption bands.
DATA:
  - type: tabulated n
    data: |
        1.44 1.67569
        1.45 1.67564
        1.46 1.6756
        1.47 1.67563
        1.48 1.67558
        1.49 1.67559
        1.5 1.67555
        1.51 1.67551
        1.52 1.67552
        1.53 1.67543
        1.54 1.67546
        1.55 1.67542
        1.56 1.67541
        1.57 1.67539
        1.58 1.67534
        1.59 1.67533
        1.6 1.67525
        1.61 1.67528
        1.62 1.67523
        1.63 1.67521
        1.64 1.67518
        1.65 1.67514
        1.66 1.6751
        1.67 1.67506
        1.68 1.67504
        1.69 1.67501
        1.7 1.67499
        1.71 1.67495
        1.72 1.67492
        1.73 1.67488
        1.74 1.67487
        1.75 1.67483
        1.76 1.6748
        1.77 1.67477
        1.78 1.67474
        1.79 1.67468
        1.8 1.67464
        1.81 1.67462
        1.82 1.67458
        1.83 1.67455
        1.84 1.6745
        1.85 1.67446
        1.86 1.67442
        1.87 1.67438
        1.88 1.67436
        1.89 1.67433
        1.9 1.67428
        1.91 1.67424
        1.92 1.67421
        1.93 1.67417
        1.94 1.67413
        1.95 1.67408
        1.96 1.67405
        1.97 1.67403
        1.98 1.67396
        1.99 1.67391
        2 1.67386
        2.01 1.6738
        2.02 1.67376
        2.03 1.67372
        2.04 1.67367
        2.05 1.67363
        2.06 1.67358
        2.07 1.67354
        2.08 1.67351
        2.09 1.67346
        2.1 1.6734
        2.11 1.67332
        2.12 1.67325
        2.13 1.6732
        2.14 1.67317
        2.15 1.67315
        2.16 1.6731
        2.17 1.67304
        2.18 1.67298
        2.19 1.67294
        2.2 1.67289
        2.21 1.67282
        2.22 1.67275
        2.23 1.67272
        2.24 1.67266
        2.25 1.67259
        2.26 1.67253
        2.27 1.67247
        2.28 1.67241
        2.29 1.67235
        2.3 1.6723
        2.31 1.67224
        2.32 1.67218
        2.33 1.67211
        2.34 1.67205
        2.35 1.67198
        2.36 1.6719
        2.37 1.67183
        2.38 1.67177
        2.39 1.6717
        2.4 1.6716
        2.41 1.67152
        2.42 1.67144
        2.43 1.67136
        2.44 1.67129
        2.45 1.67122
        2.46 1.67115
        2.47 1.67108
        2.48 1.67097
        2.49 1.67087
        2.5 1.67075
        2.51 1.67064
        2.52 1.67055
        2.53 1.67045
        2.54 1.67036
        2.55 1.67026
        2.56 1.67016
        2.57 1.67004
        2.58 1.66992
        2.59 1.66978
        2.6 1.66963
        2.61 1.66949
        2.62 1.66934
        2.63 1.66918
        2.64 1.66901
        2.65 1.66884
        2.66 1.66861
        2.67 1.66836
        2.68 1.66811
        2.69 1.66785
        2.7 1.66758
        2.71 1.66733
        2.72 1.66707
        2.73 1.66687
        2.74 1.667
        2.75 1.66712
        2.76 1.66836
        2.77 1.66975
        2.78 1.66972
        2.79 1.66969
        2.8 1.66953
        2.81 1.66936
        2.82 1.66923
        2.83 1.66932
        2.84 1.66941
        2.85 1.66949
        2.86 1.66958
        2.87 1.66984
        2.88 1.6701
        2.89 1.67036
        2.9 1.67054
        2.91 1.67056
        2.92 1.67057
        2.93 1.67055
        2.94 1.67048
        2.95 1.67041
        2.96 1.6703
        2.97 1.67015
        2.98 1.66999
        2.99 1.66982
        3 1.66962
        3.01 1.66942
        3.02 1.66921
        3.03 1.66901
        3.04 1.66881
        3.05 1.66861
        3.06 1.66839
        3.07 1.66816
        3.08 1.66794
        3.09 1.66771
        3.1 1.66749
        3.11 1.66726
        3.12 1.66703
        3.13 1.66678
        3.14 1.66652
        3.15 1.66627
        3.16 1.66596
        3.17 1.66562
        3.18 1.66529
        3.19 1.66496
        3.2 1.66462
        3.21 1.66427
        3.22 1.66393
        3.23 1.66396
        3.24 1.66408
        3.25 1.6642
        3.26 1.66455
        3.27 1.66523
        3.28 1.66566
        3.29 1.66594
        3.3 1.66622
        3.31 1.66618
        3.32 1.66578
        3.33 1.66538
        3.34 1.66513
        3.35 1.66496
        3.36 1.66479
        3.37 1.66466
        3.38 1.66469
        3.39 1.66473
        3.4 1.66476
        3.41 1.66503
        3.42 1.66554
        3.43 1.66689
        3.44 1.66786
        3.45 1.66843
        3.46 1.66901
        3.47 1.66968
        3.48 1.67043
        3.49 1.67041
        3.5 1.6703
        3.51 1.67019
        3.52 1.67007
        3.53 1.66987
        3.54 1.66964
        3.55 1.66941
        3.56 1.66918
        3.57 1.66894
        3.58 1.66867
        3.59 1.6684
        3.6 1.66813
        3.61 1.66786
        3.62 1.66758
        3.63 1.6673
        3.64 1.66701
        3.65 1.66673
        3.66 1.6665
        3.67 1.66628
        3.68 1.66605
        3.69 1.66583
        3.7 1.66561
        3.71 1.66541
        3.72 1.6652
        3.73 1.665
        3.74 1.66479
        3.75 1.66458
        3.76 1.66436
        3.77 1.66414
        3.78 1.66393
        3.79 1.66371
        3.8 1.6635
        3.81 1.66329
        3.82 1.66308
        3.83 1.66287
        3.84 1.66266
        3.85 1.66245
        3.86 1.66224
        3.87 1.66203
        3.88 1.66182
        3.89 1.66161
        3.9 1.66141
        3.91 1.66121
        3.92 1.661
        3.93 1.6608
        3.94 1.6606
        3.95 1.66039
        3.96 1.66017
        3.97 1.65995
        3.98 1.65972
        3.99 1.6595
        4 1.65927
        4.01 1.65907
        4.02 1.65886
        4.03 1.65865
        4.04 1.65845
        4.05 1.65824
        4.06 1.658
        4.07 1.65775
        4.08 1.65751
        4.09 1.65727
        4.1 1.65702
        4.11 1.65676
        4.12 1.6565
        4.13 1.65625
        4.14 1.65599
        4.15 1.65573
        4.16 1.65549
        4.17 1.65526
        4.18 1.65503
        4.19 1.6548
        4.2 1.65456
        4.21 1.65431
        4.22 1.65401
        4.23 1.65371
        4.24 1.65341
        4.25 1.65312
        4.26 1.65282
        4.27 1.65258
        4.28 1.65233
        4.29 1.65208
        4.3 1.65183
        4.31 1.65158
        4.32 1.65131
        4.33 1.65104
        4.34 1.65076
        4.35 1.65049
        4.36 1.65022
        4.37 1.64994
        4.38 1.6496
        4.39 1.64926
        4.4 1.64893
        4.41 1.64859
        4.42 1.64825
        4.43 1.64792
        4.44 1.64759
        4.45 1.64726
        4.46 1.64696
        4.47 1.64666
        4.48 1.64636
        4.49 1.646
        4.5 1.64561
        4.51 1.64521
        4.52 1.64466
        4.53 1.64398
        4.54 1.64345
        4.55 1.64305
        4.56 1.64265
        4.57 1.64225
        4.58 1.64177
        4.59 1.64124
        4.6 1.64071
        4.61 1.64026
        4.62 1.63981
        4.63 1.63937
        4.64 1.63889
        4.65 1.63834
        4.66 1.63779
        4.67 1.63729
        4.68 1.63682
        4.69 1.63636
        4.7 1.63588
        4.71 1.63529
        4.72 1.6347
        4.73 1.63411
        4.74 1.63353
        4.75 1.63296
        4.76 1.63239
        4.77 1.63184
        4.78 1.63141
        4.79 1.63097
        4.8 1.63054
        4.81 1.6301
        4.82 1.6296
        4.83 1.62879
        4.84 1.62799
        4.85 1.62701
        4.86 1.62577
        4.87 1.62482
        4.88 1.62424
        4.89 1.62371
        4.9 1.62315
        4.91 1.62246
        4.92 1.62168
        4.93 1.62061
        4.94 1.61937
        4.95 1.61831
        4.96 1.61762
        4.97 1.61693
  - type: tabulated k
    data: |
        1.82 2.06282e-05
        1.83 1.74785e-05
        1.84 1.83766e-05
        1.85 2.03946e-05
        1.86 2.0515e-05
        1.87 2.06348e-05
        1.88 2.0753e-05
        1.89 1.81411e-05
        1.9 1.23832e-05
        1.91 1.0135e-05
        1.92 1.16818e-05
        1.93 1.3261e-05
        1.94 1.48509e-05
        1.95 1.20541e-05
        1.96 8.08787e-06
        1.97 8.50232e-06
        1.98 9.76078e-06
        1.99 7.90847e-06
        2 5.31453e-06
        2.01 6.94048e-06
        2.02 9.63481e-06
        2.03 1.29805e-05
        2.04 1.65393e-05
        2.05 2.47516e-05
        2.06 3.50182e-05
        2.07 4.0713e-05
        2.08 4.08095e-05
        2.09 3.89149e-05
        2.1 3.04725e-05
        2.11 2.27508e-05
        2.12 2.4616e-05
        2.13 2.64811e-05
        2.14 2.82128e-05
        2.15 2.98811e-05
        2.16 3.25614e-05
        2.17 3.77212e-05
        2.18 4.28809e-05
        2.19 4.67789e-05
        2.2 5.06276e-05
        2.21 5.09953e-05
        2.22 4.21888e-05
        2.23 3.33824e-05
        2.24 3.44519e-05
        2.25 3.70221e-05
        2.26 3.88587e-05
        2.27 3.90751e-05
        2.28 3.92916e-05
        2.29 4.50969e-05
        2.3 5.41928e-05
        2.31 6.32888e-05
        2.32 7.14442e-05
        2.33 7.92809e-05
        2.34 8.62274e-05
        2.35 8.75173e-05
        2.36 8.88071e-05
        2.37 9.09913e-05
        2.38 9.64216e-05
        2.39 0.000101852
        2.4 0.000106556
        2.41 0.000109903
        2.42 0.00011325
        2.43 0.000117789
        2.44 0.000124419
        2.45 0.000131049
        2.46 0.000138127
        2.47 0.00014587
        2.48 0.000153612
        2.49 0.000162095
        2.5 0.000173592
        2.51 0.000185089
        2.52 0.000196586
        2.53 0.000208807
        2.54 0.000221035
        2.55 0.000233263
        2.56 0.000257487
        2.57 0.000283816
        2.58 0.000310383
        2.59 0.00033941
        2.6 0.000368437
        2.61 0.000397464
        2.62 0.000435239
        2.63 0.00047408
        2.64 0.00051292
        2.65 0.000593203
        2.66 0.00068097
        2.67 0.000760231
        2.68 0.000843981
        2.69 0.00102565
        2.7 0.00125928
        2.71 0.00158511
        2.72 0.00199914
        2.73 0.00271038
        2.74 0.00361881
        2.75 0.00438871
        2.76 0.00456467
        2.77 0.00406124
        2.78 0.00308552
        2.79 0.00295696
        2.8 0.00288409
        2.81 0.00284434
        2.82 0.00289993
        2.83 0.00297312
        2.84 0.00314599
        2.85 0.00331885
        2.86 0.00353525
        2.87 0.00353522
        2.88 0.00353165
        2.89 0.00339178
        2.9 0.00322472
        2.91 0.00303604
        2.92 0.00278579
        2.93 0.00255043
        2.94 0.00227124
        2.95 0.00208929
        2.96 0.00192569
        2.97 0.00173293
        2.98 0.00156294
        2.99 0.00144039
        3 0.00134829
        3.01 0.00126758
        3.02 0.00118964
        3.03 0.00113532
        3.04 0.00110736
        3.05 0.00107939
        3.06 0.00105142
        3.07 0.00102395
        3.08 0.00102951
        3.09 0.00103508
        3.1 0.00104065
        3.11 0.00104621
        3.12 0.00107012
        3.13 0.00111604
        3.14 0.00116197
        3.15 0.00121472
        3.16 0.00132585
        3.17 0.0014532
        3.18 0.00159613
        3.19 0.00184888
        3.2 0.00207845
        3.21 0.00248408
        3.22 0.0030182
        3.23 0.00346036
        3.24 0.00429045
        3.25 0.00494931
        3.26 0.00516577
        3.27 0.00524204
        3.28 0.00479227
        3.29 0.00438257
        3.3 0.00431045
        3.31 0.0040816
        3.32 0.00392998
        3.33 0.00386909
        3.34 0.00408567
        3.35 0.00437012
        3.36 0.00469417
        3.37 0.00526209
        3.38 0.00575919
        3.39 0.00634003
        3.4 0.00688821
        3.41 0.00759601
        3.42 0.00782586
        3.43 0.00793598
        3.44 0.00804493
        3.45 0.00772326
        3.46 0.00739004
        3.47 0.00646776
        3.48 0.0057576
        3.49 0.00523652
        3.5 0.0045463
        3.51 0.00410377
        3.52 0.00360529
        3.53 0.00323617
        3.54 0.00287135
        3.55 0.00258696
        3.56 0.00230566
        3.57 0.00210619
        3.58 0.00191359
        3.59 0.00174804
        3.6 0.00162181
        3.61 0.00150104
        3.62 0.00138412
        3.63 0.00128337
        3.64 0.00120389
        3.65 0.0011244
        3.66 0.00107046
        3.67 0.0010196
        3.68 0.000968741
        3.69 0.000926014
        3.7 0.000889637
        3.71 0.000853259
        3.72 0.000816881
        3.73 0.000781074
        3.74 0.00075833
        3.75 0.000735585
        3.76 0.000712841
        3.77 0.000690097
        3.78 0.000667352
        3.79 0.000644608
        3.8 0.000627086
        3.81 0.000613727
        3.82 0.000600368
        3.83 0.000587008
        3.84 0.000573649
        3.85 0.000560289
        3.86 0.00054693
        3.87 0.000535356
        3.88 0.000529057
        3.89 0.000522759
        3.9 0.00051646
        3.91 0.000510162
        3.92 0.000503863
        3.93 0.000497565
        3.94 0.000491266
        3.95 0.000488791
        3.96 0.000488889
        3.97 0.000488987
        3.98 0.000489086
        3.99 0.000489184
        4 0.000489283
        4.01 0.000489381
        4.02 0.00048948
        4.03 0.000488789
        4.04 0.000487882
        4.05 0.000486975
        4.06 0.000486068
        4.07 0.000485161
        4.08 0.000484254
        4.09 0.000483347
        4.1 0.00048244
        4.11 0.000481533
        4.12 0.000481398
        4.13 0.000483879
        4.14 0.000486359
        4.15 0.00048884
        4.16 0.00049132
        4.17 0.0004938
        4.18 0.000496281
        4.19 0.000498761
        4.2 0.000501242
        4.21 0.000504906
        4.22 0.000509897
        4.23 0.000514887
        4.24 0.000519878
        4.25 0.000524869
        4.26 0.00052986
        4.27 0.00053485
        4.28 0.000539841
        4.29 0.000544832
        4.3 0.00054991
        4.31 0.000555055
        4.32 0.0005602
        4.33 0.000565345
        4.34 0.000570491
        4.35 0.000575636
        4.36 0.000580781
        4.37 0.000585926
        4.38 0.000591071
        4.39 0.000606433
        4.4 0.00062672
        4.41 0.000647006
        4.42 0.000667292
        4.43 0.000687579
        4.44 0.000696996
        4.45 0.000705154
        4.46 0.000713312
        4.47 0.00072147
        4.48 0.000729627
        4.49 0.000737785
        4.5 0.000745943
        4.51 0.0007541
        4.52 0.000763083
        4.53 0.000781265
        4.54 0.000799448
        4.55 0.00081763
        4.56 0.000835812
        4.57 0.000853995
        4.58 0.000872177
        4.59 0.00089036
        4.6 0.000908542
        4.61 0.000924259
        4.62 0.000939314
        4.63 0.00095437
        4.64 0.000969425
        4.65 0.00098448
        4.66 0.000999535
        4.67 0.00101459
        4.68 0.00102965
        4.69 0.00104817
        4.7 0.00107527
        4.71 0.00110237
        4.72 0.00112947
        4.73 0.00115657
        4.74 0.00118367
        4.75 0.00121194
        4.76 0.00124052
        4.77 0.00126909
        4.78 0.00129767
        4.79 0.00132625
        4.8 0.00135482
        4.81 0.00138364
        4.82 0.00141461
        4.83 0.00144559
        4.84 0.00147656
        4.85 0.00150753
        4.86 0.00153851
        4.87 0.00156948
        4.88 0.00160765
        4.89 0.00165084
        4.9 0.00169403
        4.91 0.00173723
        4.92 0.00179064
        4.93 0.00184955
        4.94 0.00190847
        4.95 0.00196479
        4.96 0.00201822
        4.97 0.00207165
        4.98 0.00212507