An apparatus for manipulating a path of a beam includes a first wedge and
a second wedge. The first wedge includes a first refractive surface and a
second refractive surface. The second wedge includes a third refractive
surface adjacent to the second refractive surface, and a reflective
surface. The beam refracts at the first refractive surface, refracts at
the second refractive surface, refracts at the third refractive surface,
reflects from reflective surface, refracts at the third refractive
surface, refracts at the second refractive surface, refracts at the first
refractive surface. At least one of the first wedge and the second wedge
can be rotated so that the beam exiting the apparatus can be oriented
substantially orthogonal to the beam entering the apparatus.