/usr/share/xfig/Libraries/Optics/grating.fig is in xfig-libs 1:3.2.6a-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | #FIG 3.2
Portrait
Center
Metric
A4
100.00
Single
-2
1200 2
6 450 0 900 1350
2 1 0 5 -1 7 95 0 42 0.000 0 1 -1 0 0 25
540 90 495 135 540 180 495 225 540 270 495 315
540 360 495 405 540 450 495 495 540 540 495 585
540 630 495 675 540 720 495 765 540 810 495 855
540 900 495 945 540 990 495 1035 540 1080 495 1125
540 1170
2 1 0 3 -1 7 105 0 41 0.000 0 1 -1 0 0 6
540 90 540 45 720 45 720 1215 540 1215 540 1170
-6
|