A novel technique for aligning a microlens array to an electrically pa
ckaged optoelectronic device array is presented: reflective Fresnel zo
ne plates (FZP's) are fabricated on the device die to pro,ide registra
tion spots during alignment. A proof-of-concept experiment in which an
MSM array was aligned to a microlens array with an accuracy of better
than 9 microns is described.