Publication

Low coherence digital holographic tomography

Christian Depeursinge, Etienne Cuche, Pia Massatsch
2003
Conference Papers

Abstract

Low coherence, digital holographic microscopy (LCDHM) is a new 3D imaging technique combining the advantages of digital holographic microscopy with those of reduced coherence interferometry. This gives the possibility to perform tomography of 3D objects while maintaining the excellent performances of DHM. A tomographic depth resolution of 11 mum has been achieved as a proof of principle. Images of the epithelial cells of the porcine cornea are presented.

Official source

https://infoscience.epfl.ch/entities/publication/c546d518-2ec0-4901-b943-c46f73a9724c

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Christian Depeursinge, Etienne Cuche, Pia Massatsch
2003
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/c546d518-2ec0-4901-b943-c46f73a9724c

About this result

Related concepts (26)

Optical coherence tomography

Optical coherence tomography (OCT) is an imaging technique that uses low-coherence light to capture micrometer-resolution, two- and three-dimensional images from within optical scattering media (e.g., biological tissue). It is used for medical imaging and industrial nondestructive testing (NDT). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium.

Coherence (physics)

In physics, coherence expresses the potential for two waves to interfere. Two monochromatic beams from a single source always interfere. Physical sources are not strictly monochromatic: they may be partly coherent. Beams from different sources are mutually incoherent. When interfering, two waves add together to create a wave of greater amplitude than either one (constructive interference) or subtract from each other to create a wave of minima which may be zero (destructive interference), depending on their relative phase.

Coherence length

In physics, coherence length is the propagation distance over which a coherent wave (e.g. an electromagnetic wave) maintains a specified degree of coherence. Wave interference is strong when the paths taken by all of the interfering waves differ by less than the coherence length. A wave with a longer coherence length is closer to a perfect sinusoidal wave. Coherence length is important in holography and telecommunications engineering. This article focuses on the coherence of classical electromagnetic fields.