A retroreflector assembly is assembled by adhering a retroreflector to a mounting
member along a single flat back surface of the retroreflector and a flat surface
of the mounting member. The retroreflector does not otherwise contact the mounting
member. The retroreflector includes three plates having optically flat reflective
front surfaces disposed at right angles to each other, wherein each of the plates
further has a back surface disposed on an opposite side of the plate from the optically
flat reflective front surface. The mounting member comprises a bonding portion
and a base portion connected to the bonding portion, wherein the bonding portion
is adhered to the back surface of one of the three plates, and wherein the bonding
portion comprises a same material as the one of the three plates to which the bonding
portion is adhered.