We propose an optical configuration in which floating particles in a microfluidic chamber can be characterized by an interference microscopy configuration to obtain quantitative phase-contrast maps. The configuration is simply made by two laser beams from the same laser source. One beam provides the optical forces for driving the particle along appropriate paths, but at same time works as the object illumination beam in the holographic microscope. The second beam plays the role of the reference beam, allowing recording of an interference fringe pattern (i.e., the digital hologram) in an out-of-focus image plane. The system and method are illustrated and experimental results are offered for polymeric particles as well as for in vitro cells with the aim to demonstrate the approach.
© 2011 Optical Society of AmericaFull Article | PDF Article
Lisa Miccio, Andrea Finizio, Roberto Puglisi, Donatella Balduzzi, Andrea Galli, and Pietro Ferraro
Biomed. Opt. Express 2(2) 331-344 (2011)
José A. Rodrigo, Antonio M. Caravaca-Aguirre, Tatiana Alieva, Gabriel Cristóbal, and María L. Calvo
Opt. Express 19(6) 5232-5243 (2011)
Pasquale Memmolo, Lisa Miccio, Melania Paturzo, Giuseppe Di Caprio, Giuseppe Coppola, Paolo A. Netti, and Pietro Ferraro
Adv. Opt. Photon. 7(4) 713-755 (2015)