Patent ID: 7841744

Claim:
An illumination apparatus comprising: a light source unit which includes a semiconductor light emitting element for emitting illumination light and a collector lens for collecting the illuminating light; and a main body of the apparatus which holds the light source unit and guides the illumination light; wherein the light source unit comprises: a heat dissipation component which holds the semiconductor light emitting element and dissipates heat emitted from the semiconductor light emitting element; and a lens frame which holds the collector lens and holds the heat dissipation component in such a manner that a relative position of the semiconductor light emitting element with respect to the collector lens is changeable in a plane perpendicular to an optical axis of the collector lens; and wherein the main body of the apparatus has a connection hole that communicatively connects an inside of the main body of the apparatus to an outside, to hold the light source unit by inserting the lens frame into the connection hole to fit the lens frame into the connection hole.