Reflecting the signal back With optical (laser) systems you want to reflect signal back: a plain mirror wont do this unless perfectly normal to ray ·Usea" corner cube” reflector.n2 D shown on next page For satellites, need to"spoil the cube (i.e corner not exactly 90 degrees because station not where it was when signal transmitted) 02/25/02 12.540Lec0602/25/02 12.540 Lec 06 7 Reflecting the signal back • With optical (laser) systems you want to reflect signal back: a plain mirror won’t do this unless perfectly normal to ray. • Use a “corner cube” reflector. In 2-D shown on next page • For satellites, need to “spoil” the cube (i.e., corner not exactly 90 degrees because station not where it was when signal transmitted)