Abstract

Digital holography allows us to record and process digitally the complex amplitude distribution associated to diffracted light beams and therefore has offered new possibilities for a variety of applications such as 3D microscopy, interferometry, or information security (see, for example, review [1]). In principle, phase-shifting techniques are the most efficient in terms of spatial resolution to record digital holograms [2]. However, a sequential acquisition of several interference patterns with different phase retardations of the reference beam is necessary, preventing dynamic measurements. Different techniques for time-resolved dynamic interferometry have been developed allowing one-shot operation and acquisition times only limited by the sensor capabilities [3–5]. However, they require designing complex diffractive optical elements or periodic pixelated polarization devices, which are difficult to build and hard to integrate with the CCD sensor.

© 2009 IEEE