/usr/share/xfig/Libraries/Optics/beam.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 | #FIG 3.2
Portrait
Center
Metric
A4
100.00
Single
-2
1200 2
6 0 225 1575 675
2 1 0 7 4 11 100 0 -1 0.000 0 0 -1 1 0 2
1 1 3.50 105.00 210.00
225 450 1350 450
-6
|