Digital holographic movie by using a point diffraction interferometer

Claudio Iemmi, Claudio Ramírez, Juan Campos

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)


© 2015 Society of Photo-Optical Instrumentation Engineers (SPIE). A method to obtain a digital holographic movie by means of a point diffraction interferometer is described. By using a parallel aligned liquid crystal wave plate of size 3 × 3 cm2, a phase shifting interferometric technique is implemented. The optical setup is able to operate at 10 framess. Each frame can be digitally refocused to reconstruct different planes of the three-dimensional (3-D) object. By changing the frame, the object can be refocused in a different time. As an example, we show a movie which contains two objects that are separated by 160 mm. The movie shows how, for a given time (a fixed hologram frame), we can focus at different planes (separated 0.1 mm) of the 3-D object, and by changing the frame the movement of the object can be observed.
Original languageEnglish
Article number044104
JournalOptical Engineering
Publication statusPublished - 1 Apr 2015


  • Holography
  • Interferometry
  • Liquid crystal devices
  • Phase measurement


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