Patent ID: 7263249

Claim:
An optical element assembly in which an optical part is mounted on a platform for optical coupling to an optical element of an optical element chip mounted on said platform, wherein: said optical element chip has said optical element formed on the bottom of a concavity in one side of a chip body; a convexity is formed as an element mounting portion on a mounting surface of said platform on which said optical part is to be mounted; said optical element chip is mounted on said mounting surface with said concavity of said optical element chip engaged with said convexity of said element mounting portion so that said optical element is positioned with respect to said mounting surface; and said optical part is positioned with respect to said mounting surface and mounted thereon, and a part receiving recess is formed in said mounting surface of said platform to establish optical coupling between said optical part and said optical element; wherein: the position of said optical element with respect to said mounting surface is a position which is determined by surface-to-surface contact between a pair of opposed side surfaces of said concavity and a pair of opposed wall surfaces of said element mounting portion and where said optical element is parallel to said mounting surface in the direction of arrangement of said side surfaces and said wall surfaces; and the position of said optical part with respect to said mounting surface is a position which is determined by contact between opposed wall surfaces of said part receiving recess, which are parallel to said pair of opposed wall surfaces of said element part, respectively, and said optical part in the direction of arrangement of said pairs of opposed wall surfaces.