Patent ID: 8358456

Claim:
A scanning image projection apparatus comprising: a laser light source; a scanning device configured to scan a light flux from the laser light source in a horizontal direction and a vertical direction at mutually different frequencies on a projection surface, wherein the following condition is satisfied: ( B + C ) ⁢ X 2000 ≤ A ≤ 7 ⁢ L  L - X  where A represents a diameter (mm) of an exit pupil when viewed from a projection surface side, L represents a distance (mm) from the exit pupil to an image formation position of the light flux, X represents a distance (mm) from the exit pupil to an output measurement position of the apparatus, B and C respectively represent a vertically scanning angular subtense (mrad) and a horizontally scanning angular subtense (mrad) 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.