Polarized light communication device, transmitter, laser, polarized light communication device for physiological use, reflected light detector and pulse wave detecting device
US6999685B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1998 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Apr 30, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/7257
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A physiological function assisting device 1 is embedded in the body, and is provided with a transmitter 11 and receiver 12 for communicating with an external controller 2. External controller 2 controls embedded physiological function assisting device 1 from the outside. External controller 2 is provided with a transmitter 21 and receiver 22 for communicating with physiological function assisting device 1. Transmitters 11,21 modulate the plane of polarization of laser light, and emit the result as a transmission signal. Receivers 12,22 selectively receive light of a specific polarization state. Receivers 12,22 respectively output electric signals corresponding to the polarization state (polarization angle or ellipticity) of the received light. As a result, full duplex communications between a strongly dispersing medium like the human body and the outside is possible, while the power consumed by the internal device can be reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.