TY - JOUR
T1 - The effects of emission light pulse width on non invasive optical plethysmographic devices
AU - Fang, Yung Chieh
AU - Tai, Cheng Chi
N1 - Publisher Copyright:
© 2014 Taylor & Francis Group, LLC.
PY - 2014/9/3
Y1 - 2014/9/3
N2 - Projecting pulsed light on biological tissue facilitates capturing in-depth optical plethysmographs to inspect micro-vascular blood flow. However, it remains unclear how the pulse width of light emission (tpw) affects human tissue. In this study, alternating red and infrared light emitting diodes from a finger clip probe were set at 512 Hz. After conducting optical receiver sampling and digital filtering, the logarithmic ratio of the red and infrared light was used to examine their relationship to the pulse width. The pulse width varied from 70-1000 μs, yielding no observable effects on the ratios. These findings suggest that reducing the illumination time of optical components may reduce the amount of power consumed by the equipment and extend the lifetime of the power supply.
AB - Projecting pulsed light on biological tissue facilitates capturing in-depth optical plethysmographs to inspect micro-vascular blood flow. However, it remains unclear how the pulse width of light emission (tpw) affects human tissue. In this study, alternating red and infrared light emitting diodes from a finger clip probe were set at 512 Hz. After conducting optical receiver sampling and digital filtering, the logarithmic ratio of the red and infrared light was used to examine their relationship to the pulse width. The pulse width varied from 70-1000 μs, yielding no observable effects on the ratios. These findings suggest that reducing the illumination time of optical components may reduce the amount of power consumed by the equipment and extend the lifetime of the power supply.
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U2 - 10.1080/10739149.2014.917427
DO - 10.1080/10739149.2014.917427
M3 - Article
AN - SCOPUS:84907867781
SN - 1073-9149
VL - 42
SP - 522
EP - 531
JO - Instrumentation Science and Technology
JF - Instrumentation Science and Technology
IS - 5
ER -