M. Deininger et al., OPTICAL-PHASE STEP METHOD FOR ABSOLUTE RANGING INTERFEROMETRY USING COMPUTER-GENERATED HOLOGRAMS, Applied optics, 34(25), 1995, pp. 5620-5623
One main problem of an interferometric measurement is to evaluate the
object-distance from the interference function. One of the known metho
ds that delivers the object phase is the phase step method. Here we in
troduce computer-generated holograms to realize parallel phase steps w
ithout phase modulation of the reference path.