Articles with "path differential" as a keyword



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Investigating optical path and differential pathlength factor in reflectance photoplethysmography for the assessment of perfusion

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Published in 2018 at "Journal of Biomedical Optics"

DOI: 10.1117/1.jbo.23.7.075005

Abstract: Abstract. Photoplethysmography (PPG) is an optical noninvasive technique with the potential for assessing tissue perfusion. The relative time-change in the concentration of oxyhemoglobin and deoxyhemoglobin in the blood can be derived from DC part of… read more here.

Keywords: pathlength factor; path differential; perfusion; differential pathlength ... See more keywords
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Energy calibration of integrated path differential absorption lidars.

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Published in 2018 at "Applied optics"

DOI: 10.1364/ao.57.007501

Abstract: The stringent requirements for energy reference measurement represent a challenging task for integrated path differential absorption lidars to measure greenhouse gas columns from satellite or aircraft. The coherence of the lidar transmitter gives rise to… read more here.

Keywords: path differential; energy; integrated path; differential absorption ... See more keywords