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US 12,588,826 B2Granted
Photoplethysmogram sensor arrangement
AssigneePolar Electro Oy
InventorElias Pekonen
Life of this patent
Estimating the term…
Abstract
An apparatus includes the following: a photoplethysmogram sensor head including a light emitter and a photo detector, wherein the photo detector is disposed in a diagonal orientation with respect to a light path from the light emitter to the light detector; and an opaque mask over the photo detector, wherein the mask covers at least partially that half of the photo detector that is at a greater distance from the light emitter and leaves a remaining half of the photo detector exposed.
Claims12
An apparatus comprising:
- a photoplethysmogram sensor head comprising a light emitter and a photo detector arranged on a same plane, wherein a photo detection area of the photo detector has a shape having at least four corners and wherein the photo detector is disposed in a diagonal orientation with respect to a light path from the light emitter to the photo detector such that a closest point of the photo detector with respect to the light emitter is one of the corners of the photo detection area of the photo detector;
- and
- an opaque mask over the photo detector, the mask covering at least partially a half of the photo detection area of the photo detector that is at a greater distance from the light emitter, thereby preventing light from the light emitter from reaching the covered part of the photo detector and leaving the remaining half of the photo detector exposed to collect the light from the light emitter.
Dependencies are inferred from the claim text.