Patent ID: 9611735
Date: 2017-04-04
CPC Classifications: E21B,G01N

Claim:
1. An imaging-based measurement apparatus, comprising: a light source; at least one optical element for positioning in a flow conduit, the at least one optical element being part of a light path for light emitted by the light source, wherein light along the light path passes through a portion of fluid flowing in the flow conduit; an image sensor to detect the light and to measure content of the portion of the fluid; and a rotatable structure, wherein the at least one optical element comprises a window in the rotatable structure, the rotatable structure to rotate such that the light is able to pass through the window when the window is aligned with respect to the light source and the image sensor, and wherein at least one of the light source and the image sensor is part of a unit comprising an optical window through which the light is able to pass, and wherein the rotatable structure comprises a cleaning element to clean the optical window as the rotatable structure rotates.