Abstract

We describe a digital holography technique that, with the simplicity of an in-line configuration, produces holograms where the real and virtual images are completely separated, as in an off-axis configuration. An in-line setup, in which the object is imaged near the sensor, is modified by placing a shifted knife-edge aperture that blocks half the frequency spectrum at the focal plane of the imaging lens. This simple modification of the in-line holographic configuration allows discriminating the virtual and real images. As a fluid velocimetry technique, the use of this aperture removes the minimum defocusing distance requisite and reduces the out-of-plane velocity measurement errors of classical in-line holography. Results with different test objects are shown.

© 2014 Optical Society of America

Full Article  |  PDF Article
Related Articles
Digital holographic particle validation via complex wave

Jeremy de Jong and Hui Meng
Appl. Opt. 46(31) 7652-7661 (2007)

Coal powder measurement by digital holography with expanded measurement area

Yingchun Wu, Xuecheng Wu, Zhihua Wang, Linghong Chen, and Kefa Cen
Appl. Opt. 50(34) H22-H29 (2011)

Digital microscopic holography for micrometer particles in air

Juliana K. Abrantes, Michel Stanislas, Sébastien Coudert, and Luis Fernando A. Azevedo
Appl. Opt. 52(1) A397-A409 (2013)

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 (8)

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

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