Patent ID: 6872949

Claim:
A connection inspecting apparatus for inspecting connection of a connected part, said connection inspecting apparatus comprising: an irradiation part for applying radiation to the connected part of members with an application condition being invariant; a scintillator for converting the radiation passed through the connected part to a visible light; an imaging device for picking up a plurality of transmission images of the connected part generated from said scintillator for a plurality of different storage times; a sub-thickness image forming device for forming a plurality of sub-thickness images corresponding respectively to the plurality of transmission images of the plurality of different storage times supplied from said imaging device based on a relationship between a brightness density of the plurality of transmission images and a thickness of the connected part; and a superimposed image forming device for forming a thickness superimposed image of the connected part by adding the plurality of the sub-thickness images to each other, wherein said superimposed image forming device forms the thickness superimposed image of the connected part by adding the plurality of sub-thickness images to each other when a value of the thickness of the connected part is within a certain range, and extracts and collects only valid parts of the plurality of sub-thickness images, respectively, so as to form the thickness superimposed image when the value of the thickness of the connected part is not within the certain range.