Abstract

We propose a new method for focus tracking during the recording of a sequence of digital holograms while the sample experiences axial displacement. Corrected reconstruction distances can be automatically calculated, and well-focused amplitude and phase-contrast images can be obtained for each digitized hologram. The method is demonstrated for inspection of microelectromechanical systems subjected to thermal load. The method can be applied as a quasi-real-time procedure.

© 2003 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Controlling image size as a function of distance and wavelength in Fresnel-transform reconstruction of digital holograms

Pietro Ferraro, Sergio De Nicola, Giuseppe Coppola, Andrea Finizio, Domenico Alfieri, and Giovanni Pierattini
Opt. Lett. 29(8) 854-856 (2004)

Improving holographic reconstruction by automatic Butterworth filtering for microelectromechanical systems characterization

Marcella Matrecano, Pasquale Memmolo, Lisa Miccio, Anna Persano, Fabio Quaranta, Pietro Siciliano, and Pietro Ferraro
Appl. Opt. 54(11) 3428-3432 (2015)

Extended focused image in microscopy by digital holography

Pietro Ferraro, Simonetta Grilli, Domenico Alfieri, Sergio De Nicola, Andrea Finizio, Giovanni Pierattini, Bahram Javidi, Giuseppe Coppola, and Valerio Striano
Opt. Express 13(18) 6738-6749 (2005)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (2)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription