Homogenizing Light Sources in Photoplethysmography
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United States of America Patent
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Issued Date -
Jan 3, 2013
app pub date -
Jun 29, 2011
filing date -
Jun 29, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An embodiment of a light homogenizing apparatus having one or more emitters (110, 120) incident on a light mixing element. The emitters including at least one laser light source. The light mixing element comprising a diffuser (130) followed by an internally reflective light guide (160). This apparatus substantially homogenizes light from all emitters (110, 120) before light exits the internally reflective light guide (160) where it could then be incident on living tissue for use in photoplethysmographic measurement. Other embodiments are described and shown.
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