atrri.5 (2548B)
1 .\" Copyright (C) 2022, 2023 |Méso|Star> (contact@meso-star.com) 2 .\" Copyright (C) 2021 Centre National de la Recherche Scientifique 3 .\" 4 .\" This program is free software: you can redistribute it and/or modify 5 .\" it under the terms of the GNU General Public License as published by 6 .\" the Free Software Foundation, either version 3 of the License, or 7 .\" (at your option) any later version. 8 .\" 9 .\" This program is distributed in the hope that it will be useful, 10 .\" but WITHOUT ANY WARRANTY; without even the implied warranty of 11 .\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 .\" GNU General Public License for more details. 13 .\" 14 .\" You should have received a copy of the GNU General Public License 15 .\" along with this program. If not, see <http://www.gnu.org/licenses/>. 16 .Dd August 30, 2023 17 .Dt ATRRI 5 18 .Os 19 .Sh NAME 20 .Nm atrri 21 .Nd AsToRia: Refractive Index 22 .Sh DESCRIPTION 23 .Nm 24 is a plain text file format for storing a list of refractive indices 25 that vary spectrally. 26 Each refractive index is defined by 3 double precision 27 floating point numbers: the wavelength in nanometers at which the index is 28 set, followed by the real part and the imaginary part of the refractive index 29 itself. 30 Note that the listed refractive indices should be sorted in ascending 31 order relative to their wavelength. 32 .Pp 33 Characters behind the pound sign 34 .Pq Li # 35 are considered comments and are therefore 36 ignored. 37 Empty lines, that is, lines without characters or consisting solely of 38 spaces and tabs, are simply ignored. 39 .Pp 40 The file format is as follows: 41 .Bl -column (refractive-index) (::=) () 42 .It Ao Va atrri Ac Ta ::= Ta Ao Va refractive-index Ac 43 .It Ta Ta Va ... 44 .It Ao Va refractive-index Ac Ta ::= Ta 45 .Aq Va wavelength 46 .Aq Va n 47 .Aq Va kappa 48 .It Ao Va wavelength Ac Ta ::= Ta Ao Va real Ac 49 # In nm 50 .It Ao Va n Ac Ta ::= Ta Ao Va real Ac 51 # Real part 52 .It Ao Va kappa Ac Ta ::= Ta Ao Va real Ac 53 # Imaginary part 54 .El 55 .Sh EXAMPLES 56 .Bd -literal 57 # Wavelength in nm real part imaginary part 58 59 300.000011921 1.740000010 0.469999999 60 310.000002384 1.741990328 0.469004273 61 319.999992847 1.743917465 0.468010038 62 329.999983311 1.745785475 0.467014253 63 339.999973774 1.748130083 0.465993971 64 349.999964237 1.750000000 0.464985400 65 359.999954700 1.750000000 0.463959038 66 369.999945164 1.750000000 0.462961257 67 379.999935627 1.750000000 0.461990029 68 389.999926090 1.750000000 0.460981935 69 399.999916553 1.750000000 0.459957659 70 .Ed