Digital Holographic PIV


In making holography an easy-to-use technique digital holography is very promising. It records holograms directly to digital media such as CCD sensors and reconstructs the objects numerically. The idea of digital holography was first proposed more than thirty years ago, and the fundamental theory was established in early 1980's. However, practical implementation of digital holography was not feasible until recently when the technologies of digital recording devices and computers have been advanced significantly.

In LFD, we are developing a digital holographic PIV system for flow diagnostics. [see Digital in-line Holographic PIV System] Since digital recording of holograms eliminates the need of wet chemical processing, we can implement cinimatic HPIV and real-time measurement. Such a technique has great potential in microfluidics, multiphase flow, and biomedical flow applications.