We have proposed a point diffraction interferometer in which the phase stepping can be implemented by the use of liquid crystals. With this set-up we are able to register a holographic movie in which we can, for each time, focus at different planes; visualize what happens at a given plane as a function of time; or follow some object in depth and time. We are developing systems for particle tracking with application in the determination of speed field in a fluid.
- C. Iemmi, Ramírez, C., and Campos, J., “Digital holographic movie by using a point diffraction interferometer”, Optical Engineering, vol. 54, p. 044104, 2015.
- C. Ramírez, Otón, E., Iemmi, C., Moreno, I., Bennis, N., Otón, J. M., and Campos, J., “Point diffraction interferometer with a liquid crystal monopixel”, Optics Express, vol. 21, pp. 8116-8125, 2013.
- C. Iemmi, Moreno, A., and Campos, J., “Digital holography with a point diffraction interferometer”, Opt. Express, vol. 13, pp. 1885–1891, 2005.
- C. Iemmi, Moreno, A., Nicolás, J., and Campos, J., “Correction of aberrations in an optical correlator by using it as a point diffraction interferometer”, Proc. SPIE, vol. 5457, pp. 589-597, 2004.