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Proceedings Paper

Multipixel imaging of interfering photon density waves
Author(s): Jeffery S. Reynolds; Tamara L. Troy; Eva Marie Sevick-Muraca
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Paper Abstract

A gain-modulated image intensifier with a CCD array was developed and used to simultaneously acquire multi-pixel modulation amplitude and phase images of the interference pattern within 0.5% intralipid solution and resulting from two 5 mW near infrared sources modulated 180 degrees out-of-phase at frequencies between 10 and 120 MHz. Gain modulation was achieved by modulating the voltage between the image intensifier's photocathode and multichannel plate input. Homodyning the gain modulation and source signals enabled images of the interference pattern to be obtained with total exposure times on the order of 3 seconds or less. A strongly absorbing, embedded heterogeneity could be localized in two dimensions by its deflection of the interference plane between two out-of-phase sources.

Paper Details

Date Published: 18 August 1997
PDF: 7 pages
Proc. SPIE 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II, (18 August 1997); doi: 10.1117/12.280238
Show Author Affiliations
Jeffery S. Reynolds, Purdue Univ. (United States)
Tamara L. Troy, Purdue Univ. (United States)
Eva Marie Sevick-Muraca, Purdue Univ. (United States)


Published in SPIE Proceedings Vol. 2979:
Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II
Britton Chance; Robert R. Alfano, Editor(s)

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