Example files:

test_absorption.cc    check absorption routine in a bar and more directly
test_air_lens.cc
test_barrel1a.cc
test_barrel1.cc
test_barrel2.cc
test_barrel3.cc
test_cylinder.cc
test_disk.cc
test_focus2.cc
test_focus.cc
test_hook.cc
test_lens.cc
test_sheet.cc
test_simple_bar2.cc
test_simple_bar.cc
test_system.cc		adding of several systems to one optical system.
test_test.cc
test_titti.cc
test_top.cc