Homodyne frequency-domain instrument: I & Q Phase Detection System

Hong Yan Ma; Congwu Du; Britton Chance

doi:10.1117/12.280231

18 August 1997 Homodyne frequency-domain instrument: I & Q Phase Detection System

Hong Yan Ma, Congwu Du, Britton Chance

Proceedings Volume 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II; (1997) https://doi.org/10.1117/12.280231
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

The noninvasive NIR detection technique can be used to detect the clinic-related parameter such as hemoglobin concentration and saturation. By now, many techniques have been demonstrated in both time-domain and frequency domain to obtain quantitative optical properties. In this paper, we demonstrate one kind of simple homodyne phase modulation system -- in- phase and quadrature phase (I&O) detection system, introducing its principle and constitution, presenting its performance through the tests of ink, intralipid and blood model.

Citation Download Citation

Hong Yan Ma, Congwu Du, and Britton Chance "Homodyne frequency-domain instrument: I & Q Phase Detection System", Proc. SPIE 2979, Optical Tomography and Spectroscopy of Tissue: Theory, Instrumentation, Model, and Human Studies II, (18 August 1997); https://doi.org/10.1117/12.280231

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