Patent ID: 7748855

Claim:
An image projection apparatus comprising: a projection optical system including a plurality of optical elements for emitting image light via the optical elements; and a mirror for reflecting the image light from the projection optical system so as to lead the image light to a screen, wherein the mirror is disposed at one end side of an end portion of the screen, while the projection optical system is disposed at a position separated from a reflection surface side of the mirror, one of the optical elements disposed at a position that is closest to the mirror in the optical path of the projection optical system is a reflection type optical element, and a light shielding member for shielding image light deviating from an optical path is disposed at a position that is close to at least one of the outer side of an optical path from the reflection type optical element to the mirror and the outer side of an optical path from the mirror to the screen, wherein the following conditional expression (1) is satisfied: 0 <d/h< 0.1 (1), where image light that enters a surface of projection of the screen at a position that is closest to the mirror among image light entering the screen from the reflection type optical element via the mirror is a first image light, and an intersection of an imaginary line extending in the same direction as the normal direction to the surface of projection of the screen from a position on the mirror where the first image light reaches and an screen imaginary plane that is an extended plane of the surface of projection of the screen is an intersection A, d denotes a shortest distance between the intersection A and the screen, and h denotes a length of the screen in the direction of the shortest distance.