Patent ID: 6542238
Filing Date: 2003-04-01
Classification: G01N,H05K

Abstract:
An electronic component mounting apparatus for recognizing a mark provided at a specific location on a printed circuit board, and for mounting an electronic component on the printed circuit board, said mounting apparatus comprising an illumination device including:an illumination source unit for emitting light in the direction of an object, said illumination source unit including a plurality of light sources; and a light path adjusting member having a light incidence side and an emission side, at least one of said light incidence side and said emission side having a plurality of annular sub-sections arranged to form concentric circles, said annular sub-sections having different indexes of refraction, said light path adjusting member being arranged between said illumination source unit and the object to be illuminated by the light emitted from said illumination source unit so as to direct the light emitted from said illumination source unit and incident on said light path adjusting member onto the object via at least one of said annular sub-sections having a respective one of said indexes of refraction; wherein said light sources of said illumination source unit are arranged in a circle having a diameter corresponding to a diameter of one of said annular sub-sections of said light path adjusting member, said light sources being arranged to emit light toward said one of said annular sub-sections of said light path adjusting member.