Patent ID: 7410613

Claim:
A humoral testing apparatus for use with a humoral testing unit, in which measuring light is irradiated to a reagent area of a reagent layer, the reagent area forming a color as a result of a reaction with a humoral sample, and an optical density of the reagent area is detected in accordance with a light intensity of the light reflected from the reagent area, comprising: a light guide member; two or more measuring lights having wavelengths different from each other alternatively irradiating the reagent layer through the light guide member; means for performing a plurality of independent light intensity detecting operations with respect to a plurality of subareas of the reagent area of the reagent layer, each of the independent light intensity detecting operations being performed for one of the plurality of the subareas of the reagent area; and means for statistically processing results of the plurality of the independent light intensity detecting operations performed with respect to the plurality of the subareas of the reagent area, a light intensity value representative of the one of plurality of subareas of the reagent area being obtained from the statistical processing, wherein the means for performing the detecting operations includes a two-dimensional photodetector with a plurality of pixels for performing the plurality of independent light intensity detecting operations with respect to the subareas of the reagent area, and wherein the means for statistically processing is adapted to process a mean value, a median value, a normal distribution, or a mean value of the detected light intensity values, which falls with a range of plus or minus 2 standard deviations (SD) around a detected light intensity value that is associated with a maximum frequency of occurrence, and said two-dimensional photodetector detecting the intensity value of the reflected light.