自定义公式是y^2-1=A*x^2/(x^2-B^2)+C*x^2/(x^2-D^2)
其中x是波长，y是折射率。求参数A,B,C,D.万分感谢！数据如下：
x y
0.4 1.73512
0.401 1.73494
0.402 1.73477
0.403 1.7346
0.404 1.73442
0.405 1.73426
0.406 1.73409
0.407 1.73392
0.408 1.73376
0.409 1.73359
0.41 1.73343
0.411 1.73327
0.412 1.73311
0.413 1.73295
0.414 1.7328
0.415 1.73264
0.416 1.73249
0.417 1.73234
0.418 1.73218
0.419 1.73203
0.42 1.73189
0.421 1.73174
0.422 1.73159
0.423 1.73145
0.424 1.7313
0.425 1.73116
0.426 1.73102
0.427 1.73088
0.428 1.73074
0.429 1.7306
0.43 1.73047
0.431 1.73033
0.432 1.7302
0.433 1.73006
0.434 1.72993
0.435 1.7298
0.436 1.72967
0.437 1.72954
0.438 1.72941
0.439 1.72929
0.44 1.72916
0.441 1.72904
0.442 1.72891
0.443 1.72879
0.444 1.72867
0.445 1.72855
0.446 1.72843
0.447 1.72831
0.448 1.72819
0.449 1.72807
0.45 1.72796
0.451 1.72784
0.452 1.72773
0.453 1.72761
0.454 1.7275
0.455 1.72739
0.456 1.72728
0.457 1.72716
0.458 1.72706
0.459 1.72695
0.46 1.72684
0.461 1.72673
0.462 1.72663
0.463 1.72652
0.464 1.72642
0.465 1.72631
0.466 1.72621
0.467 1.72611
0.468 1.72601
0.469 1.72591
0.47 1.72581
0.471 1.72571
0.472 1.72561
0.473 1.72551
0.474 1.72541
0.475 1.72532
0.476 1.72522
0.477 1.72513
0.478 1.72503
0.479 1.72494
0.48 1.72485
0.481 1.72476
0.482 1.72466
0.483 1.72457
0.484 1.72448
0.485 1.72439
0.486 1.72431
0.487 1.72422
0.488 1.72413
0.489 1.72404
0.49 1.72396
0.491 1.72387
0.492 1.72378
0.493 1.7237
0.494 1.72362
0.495 1.72353
0.496 1.72345
0.497 1.72337
0.498 1.72329
0.499 1.72321
0.5 1.72312
0.501 1.72304
0.502 1.72296
0.503 1.72289
0.504 1.72281
0.505 1.72273
0.506 1.72265
0.507 1.72258
0.508 1.7225
0.509 1.72242
0.51 1.72235
0.511 1.72227
0.512 1.7222
0.513 1.72213
0.514 1.72205
0.515 1.72198
0.516 1.72191
0.517 1.72184
0.518 1.72176
0.519 1.72169
0.52 1.72162
0.521 1.72155
0.522 1.72148
0.523 1.72141
0.524 1.72135
0.525 1.72128
0.526 1.72121
0.527 1.72114
0.528 1.72108
0.529 1.72101
0.53 1.72094
0.531 1.72088
0.532 1.72081
0.533 1.72075
0.534 1.72068
0.535 1.72062
0.536 1.72056
0.537 1.72049
0.538 1.72043
0.539 1.72037
0.54 1.72031
0.541 1.72025
0.542 1.7
0.543 1.7
0.544 1.7
0.545 1.72
0.546 1.71994
0.547 1.71988
0.548 1.71983
0.549 1.71977
0.55 1.71971
0.551 1.71965
0.552 1.71959
0.553 1.71954
0.554 1.71948
0.555 1.71942
0.556 1.71937
0.557 1.71931
0.558 1.71926
0.559 1.7192
0.56 1.71915
0.561 1.71909
0.562 1.71904
0.563 1.71898
0.564 1.71893
0.565 1.71888
0.566 1.71883
0.567 1.71877
0.568 1.71872
0.569 1.71867
0.57 1.71862
0.571 1.71856
0.572 1.71851
0.573 1.71846
0.574 1.71841
0.575 1.71836
0.576 1.71831
0.577 1.71826
0.578 1.71822
0.579 1.71817
0.58 1.71812
0.581 1.71807
0.582 1.71802
0.583 1.71797
0.584 1.71793
0.585 1.71788
0.586 1.71783
0.587 1.71779
0.588 1.71774
0.589 1.71769
0.59 1.71765
0.591 1.7176
0.592 1.71755
0.593 1.71751
0.594 1.71747
0.595 1.71742
0.596 1.71738
0.597 1.71733
0.598 1.71729
0.599 1.71724
0.6 1.7172
0.601 1.71716
0.602 1.71711
0.603 1.71707
0.604 1.71703
0.605 1.71699
0.606 1.71694
0.607 1.7169
0.608 1.71686
0.609 1.71682
0.61 1.71678
0.611 1.71674
0.612 1.7167
0.613 1.71666
0.614 1.71662
0.615 1.71658
0.616 1.71654
0.617 1.7165
0.618 1.71646
0.619 1.71642
0.62 1.71638
0.621 1.71634
0.622 1.7163
0.623 1.71626
0.624 1.71623
0.625 1.71619
0.626 1.71615
0.627 1.71611
0.628 1.71608
0.629 1.71604
0.63 1.716
0.631 1.71597
0.632 1.71593
0.633 1.71589
0.634 1.71586
0.635 1.71582
0.636 1.71578
0.637 1.71575
0.638 1.71571
0.639 1.71568
0.64 1.71564
0.641 1.71561
0.642 1.71557
0.643 1.71554
0.644 1.7155
0.645 1.71547
0.646 1.71544
0.647 1.7154
0.648 1.71537
0.649 1.71534
0.65 1.7153
0.651 1.71527
0.652 1.71524
0.653 1.7152
0.654 1.71517
0.655 1.71514
0.656 1.71511
0.657 1.71507
0.658 1.71504
0.659 1.71501
0.66 1.71498
0.661 1.71495
0.662 1.71492
0.663 1.71489
0.664 1.71485
0.665 1.71482
0.666 1.71479
0.667 1.71476
0.668 1.71473
0.669 1.7147
0.67 1.71467
0.671 1.71464
0.672 1.71461
0.673 1.71458
0.674 1.71455
0.675 1.71452
0.676 1.71449
0.677 1.71446
0.678 1.71443
0.679 1.71441
0.68 1.71438
0.681 1.71435
0.682 1.71432
0.683 1.71429
0.684 1.71426
0.685 1.71424
0.686 1.71421
0.687 1.71418
0.688 1.71415
0.689 1.71412
0.69 1.7141
0.691 1.71407
0.692 1.71404
0.693 1.71401
0.694 1.71399
0.695 1.71396
0.696 1.71394
0.697 1.71391
0.698 1.71388
0.699 1.71386
0.7 1.71383
0.701 1.7138
0.702 1.71378
0.703 1.71375
0.704 1.71373
0.705 1.7137
0.706 1.71368
0.707 1.71365
0.708 1.71363
0.709 1.7136
0.71 1.71358
0.711 1.71355
0.712 1.71353
0.713 1.7135
0.714 1.71348
0.715 1.71345
0.716 1.71343
0.717 1.7134
0.718 1.71338
0.719 1.71336
0.72 1.71333
0.721 1.71331
0.722 1.71328
0.723 1.71326
0.724 1.71324
0.725 1.71321
0.726 1.71319
0.727 1.71317
0.728 1.71314
0.729 1.71312
0.73 1.7131
0.731 1.71308
0.732 1.71305
0.733 1.71303
0.734 1.71301
0.735 1.71299
0.736 1.71297
0.737 1.71294
0.738 1.71292
0.739 1.7129
0.74 1.71288
0.741 1.71286
0.742 1.71283
0.743 1.71281
0.744 1.71279
0.745 1.71277
0.746 1.71275
0.747 1.71273
0.748 1.71271
0.749 1.71269
0.75 1.71266
0.751 1.71264
0.752 1.71262
0.753 1.7126
0.754 1.71258
0.755 1.71256
0.756 1.71254
0.757 1.71252
0.758 1.7125
0.759 1.71248
0.76 1.71246
0.761 1.71244
0.762 1.71242
0.763 1.7124
0.764 1.71238
0.765 1.71236
0.766 1.71234
0.767 1.71232
0.768 1.7123
0.769 1.71228
0.77 1.71226
0.771 1.71225
0.772 1.71223
0.773 1.71221
0.774 1.71219
0.775 1.71217
0.776 1.71215
0.777 1.71213
0.778 1.71211
0.779 1.7121
0.78 1.71208
0.781 1.71206
0.782 1.71204
0.783 1.71202
0.784 1.712
0.785 1.71198
0.786 1.71197
0.787 1.71195
0.788 1.71193
0.789 1.71191
0.79 1.7119
0.791 1.71188
0.792 1.71186
0.793 1.71184
0.794 1.71183
0.795 1.71181
0.796 1.71179
0.797 1.71177
0.798 1.71176
0.799 1.71174
0.8 1.71172
0.801 1.71171
0.802 1.71169
0.803 1.71167
0.804 1.71166
0.805 1.71164
0.806 1.71162
0.807 1.71161
0.808 1.71159
0.809 1.71157
0.81 1.71156
0.811 1.71154
0.812 1.71153
0.813 1.71151
0.814 1.71149
0.815 1.71148
0.816 1.71146
0.817 1.71144
0.818 1.71143
0.819 1.71141
0.82 1.7114
0.821 1.71138
0.822 1.71137
0.823 1.71135
0.824 1.71134
0.825 1.71132
0.826 1.7113
0.827 1.71129
0.828 1.71127
0.829 1.71126
0.83 1.71124
0.831 1.71123
0.832 1.71121
0.833 1.7112
0.834 1.71118
0.835 1.71117
0.836 1.71116
0.837 1.71114
0.838 1.71113
0.839 1.71111
0.84 1.7111
0.841 1.71108
0.842 1.71107
0.843 1.71105
0.844 1.71104
0.845 1.71102
0.846 1.71101
0.847 1.711
0.848 1.71098
0.849 1.71097
0.85 1.71095
0.851 1.71094
0.852 1.71093
0.853 1.71091
0.854 1.7109
0.855 1.71089
0.856 1.71087
0.857 1.71086
0.858 1.71084
0.859 1.71083
0.86 1.71082
0.861 1.7108
0.862 1.71079
0.863 1.71078
0.864 1.71076
0.865 1.71075
0.866 1.71074
0.867 1.71072
0.868 1.71071
0.869 1.7107
0.87 1.71069
0.871 1.71067
0.872 1.71066
0.873 1.71065
0.874 1.71063
0.875 1.71062
0.876 1.71061
0.877 1.7106
0.878 1.71058
0.879 1.71057
0.88 1.71056
0.881 1.71055
0.882 1.71053
0.883 1.71052
0.884 1.71051
0.885 1.71049
0.886 1.71048
0.887 1.71047
0.888 1.71046
0.889 1.71045
0.89 1.71043
0.891 1.71042
0.892 1.71041
0.893 1.7104
0.894 1.71039
0.895 1.71038
0.896 1.71036
0.897 1.71035
0.898 1.71034
0.899 1.71033
0.9 1.71032
0.901 1.7103
0.902 1.71029
0.903 1.71028
0.904 1.71027
0.905 1.71026
0.906 1.71025
0.907 1.71023
0.908 1.71022
0.909 1.71021
0.91 1.7102
0.911 1.71019
0.912 1.71018
0.913 1.71017
0.914 1.71016
0.915 1.71015
0.916 1.71014
0.917 1.71012
0.918 1.71011
0.919 1.7101
0.92 1.71009
0.921 1.71008
0.922 1.71007
0.923 1.71006
0.924 1.71005
0.925 1.71004
0.926 1.71003
0.927 1.71002
0.928 1.71001
0.929 1.70999
0.93 1.70998
0.931 1.70997
0.932 1.70996
0.933 1.70995
0.934 1.70994
0.935 1.70993
0.936 1.70992
0.937 1.70991
0.938 1.7099
0.939 1.70989
0.94 1.70988
0.941 1.70987
0.942 1.70986
0.943 1.70985
0.944 1.70984
0.945 1.70983
0.946 1.70982
0.947 1.70981
0.948 1.7098
0.949 1.70979
0.95 1.70978
0.951 1.70977
0.952 1.70976
0.953 1.70975
0.954 1.70974
0.955 1.70973
0.956 1.70972
0.957 1.70971
0.958 1.7097
0.959 1.70969
0.96 1.70968
0.961 1.70968
0.962 1.70967
0.963 1.70966
0.964 1.70965
0.965 1.70964
0.966 1.70963
0.967 1.70962
0.968 1.70961
0.969 1.7096
0.97 1.70959
0.971 1.70958
0.972 1.70957
0.973 1.70956
0.974 1.70955
0.975 1.70955
0.976 1.70954
0.977 1.70953
0.978 1.70952
0.979 1.70951
0.98 1.7095
0.981 1.70949
0.982 1.70948
0.983 1.70947
0.984 1.70947
0.985 1.70946
0.986 1.70945
0.987 1.70944
0.988 1.70943
0.989 1.70942
0.99 1.70941
0.991 1.7094
0.992 1.7094
0.993 1.70939
0.994 1.70938
0.995 1.70937
0.996 1.70936
0.997 1.70935
0.998 1.70934
0.999 1.70934
1 1.70933
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