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Optica Publishing Group
  • Conference on Lasers and Electro-Optics
  • OSA Technical Digest (Optica Publishing Group, 1996),
  • paper CTuK3

3-D depth-resolved imaging through turbid media using time-gated photorefractive holography

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Abstract

Optical imaging through biological tissue may provide a safe, real-time diagnostic tool for medical applications. Unfortunately, the strong scattering of most tissue types (a scattering mean free path (MFP) is ~ 100 μm) preclude conventional imaging through even 1 mm. Confocal imaging can discriminate against scattered light to improve images (e.g. Ref. 1) but the integration times required to scan each pixel imply a long-image acquisition time. For many applications it is preferable to acquire a whole image field simultaneously. One possible technique is coherence gating by holography, which exploits the fact that scattered fight loses coherence.

© 1996 Optical Society of America

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