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Physics
Classical Physics
Optics
Why does PPG (photoplethysmography) Use Infrared and Green Both Light
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[QUOTE="berkeman, post: 6119631, member: 8921"] Happy to. I didn't get directly to it on my first try. First Google search was to find out what "PPG" stood for in your title (I then added the parenthetical bit to help others know what it was). I clicked into a few articles about PPG to see if they talked about the different wavelengths of light, but none seemed to. There were a couple good papers comparing EKG and PPG for accuracy and information content, but I couldn't find anything on the two light modalities. So I got frustrated and tried a more directed search, in case I got lucky with some hits. I searched: PPG IR versus Green Light, and the link above was the 1st hit on the hit list. I prefer to use references to the NIH website when I can, and clicking into the abstract seemed to be a pretty good match for what you were looking for. Sometimes we get lucky! :smile: [URL]https://www.google.com/search?q=PPG+IR+versus+Green+Light&ie=utf-8&oe=utf-8&client=firefox-b-1[/URL] [/QUOTE]
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Forums
Physics
Classical Physics
Optics
Why does PPG (photoplethysmography) Use Infrared and Green Both Light
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