Patent ID: 9719934
Date: 2017-08-01
CPC Classifications: B01L,G01N,Y10T

Claim:
1. An assay result reading apparatus comprising a housing that accommodates a lateral flow assay test strip in which a detectable substance tends to accumulate within a detection zone of the lateral flow assay test strip aligned with the housing, the housing having a window therein; a light source which emits light through the window so as to illuminate the detection zone of the lateral flow assay test strip; and a light detector to detect the amount of light reflected and/or transmitted by the detection zone, which amount is at least partly dependent on the amount of detectable substance accumulated in the detection zone; wherein the shape of the window normalizes variations in light intensity and renders the reading apparatus less sensitive to minor mis-positioning of the detection zone due to a test strip insertion, relative to one or more of the window, the light source and the light detector, wherein the window comprises one opposite pair of straight-edged parallel surfaces, and one opposite pair of concave surfaces.