Multipixel imaging of interfering photon density waves

Jeffery S. Reynolds; Tamara L. Troy; Eva Marie Sevick-Muraca

doi:10.1117/12.280238

18 August 1997 Multipixel imaging of interfering photon density waves

Jeffery S. Reynolds, Tamara L. Troy, Eva Marie Sevick-Muraca

Proceedings Volume 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II; (1997) https://doi.org/10.1117/12.280238
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

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.

Citation Download Citation

Jeffery S. Reynolds, Tamara L. Troy, and Eva Marie Sevick-Muraca "Multipixel imaging of interfering photon density waves", Proc. SPIE 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II, (18 August 1997); https://doi.org/10.1117/12.280238

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