In an image projection system, light emitted by a point souce (2) is reflected off the concave surface of a reflector (1) to a fly-eye-lens system (3, 4, 5, 6) where the incident light is distributed to uniformly irradiate multiple optical elements (45). Each optical element (45) splits incident light into a first, polarized component and a second, nonpolarized component parallel to the first component, and polarizes the second component identically to the first component. Light from the enhancer (5) is imagewise-modulated by an image formed in a display panel and projected onto a screen. The reflector (1) is configured so that any point on the reflector (1) is defined by an equation containing a term of parabola and at least one term of a series of aspheric coefficients of order of even number which is equal to or greater than two.