-
Notifications
You must be signed in to change notification settings - Fork 21
/
refrindx.m
227 lines (219 loc) · 6.79 KB
/
refrindx.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
function [ n_refr, dens, hard ] = refrindx( wavelength, glass )
% REFRINDX refractive index calculations.
%
% INPUT:
% wavelength - light wavelength in meters
% glass - material string
%
% OUTPUT:
% n_refr - refractive index for the wavelengths: 587.6, 486.1, 656.3 nm
% dens - material density in g/cm^3
% hard - abrasion resistance from 1 to 10 (Mohs hardness)
%
% Data from JML Optical Industries, Inc available at:
% http://www.netacc.net/~jmlopt/transmission2.html
% Or at:
% http://www.jmlopt.com/level2/TechInfo/materialstable.aspx
%
% The human eye data are from in Escudero-Sanz & Navarro,
% "Off-axis aberrations of a wide-angle schematic eye model",
% JOSA A, 16(8), 1881-1891 (1999).
persistent glass_names_sellmeier refr_consts_sellmeier
if isempty( wavelength )
wavelength = 5876e-10; % green
end
n_refr = [];
dens = [];
hard = [];
if isempty( glass_names_sellmeier )
qwe = '';
fp = fopen( 'Sellmeier.glass.refr', 'r' );
while ~feof( fp )
qwe = str2mat( qwe, fgetl( fp ) );
end
glass_names_sellmeier = qwe( 2:end, 1:7 );
refr_consts_sellmeier = str2num( qwe( 2:end, 8:end ) );
end
lambda_ref = [ 5876 4861 6563 ] * 1e-10;
lambda_eye = [4580 5430 5893 6328] * 1e-10;
if isempty( wavelength )
wavelength = lambda_ref( 1 ); % green wavelength by default
end
ind = strmatch( glass, glass_names_sellmeier );
if ~isempty( ind )
lambda = wavelength * 1e6; % change units to micrometer
A = refr_consts_sellmeier( ind, 1:3 );
B = refr_consts_sellmeier( ind, 4:6 );
n_refr = sqrt( 1 + A(1) * lambda.^2 ./ ( lambda.^2 - B(1) ) + ...
A(2) * lambda.^2 ./ ( lambda.^2 - B(2) ) + ...
A(3) * lambda.^2 ./ ( lambda.^2 - B(3) ) );
else
switch lower( glass )
case 'air'
nref = [ 1 1 1 ];
dens = 0.001225;
hard = 0;
case 'water'
nref = [ 1.3325 1.3356 1.3310 ];
dens = 1.;
hard = 0;
case 'ice'
nref = [ 1.3098 1.3137 1.3079 ];
dens = 0.9167;
hard = 1.5;
case { 'quartz' 'SiO2' }
nref = [ 1.4585 1.4631 1.4564 ];
dens = 2.648;
hard = 7;
case 'diamond'
nref = [ 2.4168 2.4305 2.4088 ];
dens = 3.51;
hard = 10;
case { 'mirror' 'soot' }
nref = [ 1 1 1 ];
% plastics
case { 'pmma', 'acrylic' }
nref = [ 1.491 1.496 1.488 ];
dens = 1.185;
hard = 10;
case { 'pc', 'polycarbonate' }
nref = [ 1.5849 1.5994 1.5782 ];
dens = 1.21;
hard = 2;
case { 'ps', 'polystyrene' }
nref = [ 1.5917 1.6056 1.5853 ];
dens = 1.06;
hard = 4;
case { 'nas-21' 'nas' }
nref = [ 1.5714 1.5835 1.5669 ];
dens = 1.09;
hard = 6;
case { 'optorez-1330' 'optorez' }
nref = [ 1.5094 1.5163 1.5067 ];
dens = 1.19;
case { 'zeonex-e48r' 'zeonex' }
nref = [ 1.5309 1.5376 1.5273 ];
dens = 1.01;
hard = 10;
case 'optimas6000'
nref = [1.5013 1.5061 1.4969];
dens = 1.08;
hard = 10;
case { 'r-5000' 'polysulfone' 'psu' }
nref = [ 1.675 1.696 1.660];
dens = 1.24;
% glasses
case 'b270'
nref = [1.5230 1.5292 1.5202];
dens = 2.55;
case 'bak1'
nref = [1.5725 1.5794 1.5694];
dens = 3.19;
case 'bak2'
nref = [1.5399 1.5462 1.5372];
case 'bak4'
nref = [1.56883 1.5759 1.56576];
dens = 3.10;
case 'balkn3'
nref = [1.51849 1.52447 1.51586];
case 'bk7'
nref = [1.5168 1.5224 1.5143];
dens = 2.51;
case 'f2'
nref = [1.6200 1.6320 1.6150];
dens = 3.60;
case 'f3'
nref = [1.61293 1.62461 1.60806];
case 'f4'
nref = [1.6165 1.6284 1.6116];
case 'fusedsilica'
nref = [1.458 1.463 1.456];
dens = 2.20;
case 'k5'
nref = [1.5224 1.5285 1.5198];
dens = 2.59;
case 'k7'
nref = [1.51112 1.517 1.50854];
case 'lasfn9'
nref = [1.850 1.8689 1.8425];
dens = 4.44;
case 'lah71'
nref = [1.8502 1.8689 1.8425];
case 'n-bk7'
nref = [1.5197 1.5239 1.5156];
case 'pyrex'
nref = [1.473 1.478 1.471];
case 'sapphire'
nref = [1.7682 1.7756 1.7649];
dens = 3.97;
case 'sf1'
nref = [1.71736 1.73462 1.71031];
dens = 3.66;
case 'sf2'
nref = [1.6476 1.6612 1.6421];
dens = 3.86;
case 'sf5'
nref = [1.6727 1.6875 1.66661];
dens = 4.07;
case 'sf8'
nref = [1.6889 1.7046 1.6825];
dens = 4.22;
case 'sf10'
nref = [1.72825 1.74648 1.72085];
dens = 4.28;
case 'sf11'
nref = [1.7847 1.8064 1.7759];
dens = 5.41;
case 'sf12'
nref = [1.64831 1.66187 1.64271];
case 'sf15'
nref = [1.69895 1.71546 1.69221];
dens = 2.92;
case 'sf18'
nref = [1.7215 1.7390 1.7143];
dens = 4.49;
case 'sf19'
nref = [1.6668 1.6811 1.6609];
case 'sf56'
nref = [1.7847 1.8061 1.7760];
dens = 3.28;
case 'sk3'
nref = [1.6088 1.6160 1.6056];
case 'sk5'
nref = [1.5891 1.5958 1.5861];
case 'sk11'
nref = [1.5638 1.5702 1.5610];
dens = 3.08;
case 'sk16'
nref = [1.6204 1.6275 1.6172];
case 'ssk2'
nref = [1.6223 1.63048 1.61878];
case 'ssk4a'
nref = [1.61765 1.62547 1.61427];
case 'ssk51'
nref = [1.60361 1.61147 1.60022];
case 'zk5'
nref = [1.53375 1.54049 1.53084];
% eye
case 'cornea'
nref = [1.3828 1.3777 1.376 1.3747];
case 'aqueous'
nref = [1.3445 1.3391 1.3374 1.336];
case 'lens'
nref = [1.4292 1.4222 1.42 1.4183];
case 'vitreous'
nref = [1.3428 1.3377 1.336 1.3347];
otherwise
error( [ 'No values for glass absorption for: ', glass ] );
end
if strcmp( glass, 'cornea' ) || ...
strcmp( glass, 'aqueous' ) || ...
strcmp( glass, 'lens' ) || ...
strcmp( glass, 'vitreous' )
[ abc, ~, Mu ] = polyfit( 1./lambda_eye.^2, nref, 2 );
else
[ abc, ~, Mu ] = polyfit( 1./lambda_ref.^2, nref, 2 );
end
n_refr = polyval( abc, 1./wavelength.^2, [], Mu );
end
end