Fresnel incoherent correlation holography (FINCH): A different way of 3D imaging

Joseph Rosen, Gary Brooker

Research output: Contribution to specialist publicationArticle

2 Scopus citations

Abstract

A method for creating digital holograms of incoherent objects, dubbed Fresnel incoherent correlation holography (FINCH), creates holograms by a single-channel, on-axis, incoherent, self-referenced interferometer using white light as the source. FINCH can operate with a wide variety of light sources, and in principle could be made to work at any wavelength in the electromagnetic spectrum. Because of this flexibility, it can be used in high-resolution holographic applications that were not possible in the past because they were limited by the need for coherent laser light. The depth of the object points is encoded by the density of the rings such that points closer to the system project rings that are denser than those from distant points. As a result, the 3D information in the volume being imaged is recorded by the digital camera. Therefore, each plane in the image space reconstructed from the Fresnel hologram is in focus at a different axial distance.

Original languageEnglish
Pages49-51
Number of pages3
Volume49
No3
Specialist publicationLaser Focus World
StatePublished - 1 Mar 2013

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