Scanning image projection apparatus

摘要

The image projection apparatus (301, 401, 501) includes a laser light source (302-304, 402-404), and a scanning device (101, 306, 408, 502, 503) scanning a light flux from the laser light source in horizontal and vertical directions at mutually different frequencies on a projection surface. A condition of B+C⁢X2000≤A≤7⁢LL-X is satisfied. A represents a diameter of an exit pupil (310) when viewed from a projection surface side, L represents a distance from the exit pupil to an image formation position of the light flux, X represents a distance from the exit pupil to an output measurement position, B and C respectively represent vertical and horizontally scanning angular subtenses of a scan pulse formed by the light flux, the scan pulse having a pulse length equal to or shorter than 18 microseconds and passing through a measurement aperture placed at the output measurement position.