Illumination apparatus and image projection apparatus

Abstract

An illumination apparatus illuminating an objective illumination region comprises a plurality of illuminants having light-emitting surfaces radiating diffused light, an illuminant substrate in which the illuminants are disposed so as to be set in array on the circumference, at least one optical member configured to guide the diffused light to the objective illumination region, a movable section configured to drive the optical member so as to be rotatable around the center of the circumference serving as a rotation center, and a lighting control section configured to control a light-emitting timing of the plurality of illuminants. The movable section and the lighting control section operate together such that the quantity of light per unit time of the diffused light guided to the objective illumination region is within a predetermined range.

1 . An illumination apparatus illuminating an objective illumination region, comprising: 
 a plurality of illuminants having light-emitting surfaces radiating diffused light; and    a plurality light guiding prisms disposed in the vicinity of the illuminant in the positional relationship so as to be point symmetrical with respect to the center of the illuminant,    wherein    the light guiding prism includes: 
 an incident surface configured to make the outgoing light from the illuminant be incident;  
 a reflecting surface configured to reflect the light incident from the incident surface and guiding the light in the prism to a predetermined direction; and  
 an outgoing surface configured to radiate the light guided at the reflecting surface.