High-Throughput Alignment-Insensitive Optical Connector for Laser-Based Photoplethysmography
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United States of America Patent
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Issued Date -
Nov 15, 2012
app pub date -
May 13, 2011
filing date -
May 13, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
One embodiment of an optical coupling for use in a photoplethysmographic device having a first light guide (160) with core (150) that mates to a second light guide (210) that has a core (220) with a diameter and numerical aperture that are larger than those of the first light guide. This results in a high-throughput optical coupling that is insensitive to lateral offset and angular misalignments of the light guide axes. It allows the use of lower-cost, lower-precision molded parts in the manufacture of optical connectors, yet maximizes the light that is available for delivery to the tissue-under-test. Other embodiments are described and shown.
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