Illumination optical system, uneven color method of improving the illumination optical system, projector and projector system

摘要

illumination optical system (10) includes a first light flux emitted by the divergent angle .theta.1 from the optical fiber (101) and the lens (1) for condensing, in an optical fiber (102) than the divergence angle .theta.2 ( .theta.1) emitted, provided the second light flux which color is different from the first light flux and the condensed lenses (2), the position where the optical axes are orthogonal to the optical axis and the lens (2) of the lens (1) having transmitted through the first light beam incident from the lens (1), a lens and the second light beam incident from (2) a first dichroic mirror (3) which the light beam is reflected in a direction that has passed through the . Each lens (1,2) is configured such that the convergent angle of the second light flux converged by the convergent angle and the lens of the first light flux converged (2) match the lens (1) .