Time-gated holographic imaging using photorefractive materials

  • Sam C.W. Hyde
  • , Nicholas P. Barry
  • , Richard Jones
  • , Christopher Dainty
  • , Paul M.W. French
  • , Barry A. Wechsler
  • , Marvin B. Klein

Research output: Chapter in Book or Conference Publication/ProceedingConference Publicationpeer-review

Abstract

We present results for real-time holographic imaging in the medical imaging window (approximately 650 to 1000 nm) using photorefractive media. By recording holograms of a USAF test chart using a Ti:sapphire laser, we have selected the coherent)mostly ballistic) light and formed an image through a scattering medium which simulates biological tissue. The advantage of this approach is that a 2D image may be acquired in 'real time', i.e. without scanning. This will permit electronic signal processing and averaging, which may be used to reduce the deleterious effects of speckle. If the holograom is written with ultrashort pulses, then time-gated imaging is possible. This may be used to provide depth information by recording the 'time of flight' of the image light. We have recorded such holograms with picosecond pulses and present time-gated image data.

Original languageEnglish
Title of host publicationOptical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media
Subtitle of host publicationTheory, Human Studies, and Instrumentation
EditorsBritton Chance, Robert R. Alfano
PublisherSPIE
Pages639-647
Number of pages9
ISBN (Electronic)9780819417367
DOIs
Publication statusPublished - 30 May 1995
Externally publishedYes
EventOptical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation - San Jose, United States
Duration: 1 Feb 199528 Feb 1995

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume2389
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceOptical Tomography, Photon Migration, and Spectroscopy of Tissue and Model Media: Theory, Human Studies, and Instrumentation
Country/TerritoryUnited States
CitySan Jose
Period1/02/9528/02/95

Keywords

  • Holography
  • Photorefractive
  • Scattering
  • Time-gating

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