US Patent 7524088 Light source unit and projector system

A light source unit includes a light source made up of a reflector having a lamp accommodating opening and a light exiting opening, and a lamp having a bulb for emitting light and electrode introducing portions which guide electrodes into the bulb. In addition, the light source unit includes an anomalous lens which is disposed to collect light emitted from the light source to be situated on an optical axis of the light emitted from the light source, and a condenser lens for collecting light which has exited from the anomalous lens. The lamp is inserted into the reflector from the lamp accommodating opening, and the bulb is disposed within the reflector so that a position of a focal point of radiated light which is reflected from an inner wall of the reflector is not situated on the electrode introducing portions and the anomalous lens, but is situated between the electrode introducing portions and the anomalous lens, forming a circle centered at an optical axis of the radiated light.