Patent ID: 9423683
Filing Date: 2016-08-23
CPC Classification: G03B

Claim Text:
1. An image projection apparatus which enlarges and projects an image displayed on an image display element as a projection image on a screen, comprising: the image display element which displays an image to be enlarged and projected; a refracting optical system which includes a free-curved lens; a reflecting optical system which includes at least one concave mirror; and a light-blocking member which includes an aperture, wherein for a sectional surface of a total light flux after the concave mirror, the total light flux being a plurality of whole light beams introduced into the refracting optical system from the image display element and imaged on the screen, wherein a direction corresponding to a long side direction of the projection image is a direction A and a direction corresponding to a short side direction of the projection image is a direction B, the light-blocking member is disposed so that the aperture is located in between (1) a first position at which a width of the sectional surface in the direction A is smallest, and (2) a second position at which a width of the sectional surface in the direction B is smallest.