QPI technology

The QPI algorithm enables the extraction of phase information from incoherent, polychromatic radiation without requiring special optical components. The algorithm can recover phase information from just two conventional brightfield images taken at slightly different focal planes.

The algorithm has a number of key advantages, including:

returns phase and intensity information independently
provides quantitative, absolute phase (with DC offset)
is a rapid, stable, non-iterative solution
works with non-uniform and partially coherent illumination
offers relaxed beam conditioning
solves the twin image problem of holography
has been experimentally applied to a number of radiations

Iatia's QPI algorithm was developed by Professor Keith Nugent, then head of the School of Physics at the University of Melbourne, and his team. For a simple introduction to the technology, please see Professor Nugent’s overview.

For additional information on the algorithm itself, please see our Inside QPI page.