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 Imaging'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 a comparison between QPI and Optical Phase Contrast, please see link.
For additional information on the algorithm itself, please see our Inside QPI page.