Patent ID: 9091573
Filing Date: 2015-07-28
Classification: A61B,G01F,G01N,G01P,G01S

Abstract:
1. A sensor device for determining a flow characteristic of an object being movable in an element, the sensor device comprising: a light emitting unit configured for emitting light towards the element, a light detecting unit configured for detecting light scattered back from the element, an optical structure including a light incidence lens portion and a light detection lens portion, the light incidence lens portion and the light detection lens portion being displaced from one another, wherein the light incidence lens portion is configured to emit light incident on the a first portion of the element and the light detection lens portion is configured to receive back-scattered light which is scattered back from a second portion of the element for detection, the first and second element portions being separated from each other, wherein the optical structure blocks any back-scattered light received by the light incident lens portion, and a unit configured for receiving light indicative of the emitted light and the detected back-scattered light such that the flow charactistics of the moveable object are determinable by self-mixing interferometry.