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OPTICAL VITAL SIGNS SENSOR

  • US 20170202466A1
  • Filed: 03/31/2017
  • Published: 07/20/2017
  • Est. Priority Date: 10/02/2014
  • Status: Active Grant
First Claim
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1. Optical vital signs sensor configured to measure or determine vital signs of a user, comprising a photoplethysmographic sensor having:

  • a housing with a contact surface configured to be placed directly onto a skin of a user,at least one light source configured to generate a light beam having an angular range of angles of incidence, wherein said light beam is emitted via the contact surface and is directed towards a skin of the user,at least one photo detector unit configured to detect light which is indicative of a reflection of the light beam from the at least one light source in or from the skin of the user,wherein the at least one light source and the at least one photo detector unit are arranged adjacent to each other inside the housing with a distance between them, anda light shaping unit arranged between the at least one light source and the contact surface and configured to shape the light beam of the at least one light source by limiting the angular range of the angle of incidence (α

    ) with respect to the contact surface to less than 20°

    .

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