Patent ID: 8337024
Filing Date: 2012-12-25
Classification: G03B

Abstract:
1. A projection optical system for enlarging and projecting a light flux from an image display panel modulating an irradiation light, onto a screen in an oblique direction, the projection optical system comprising: a lens system including a plurality of lenses, the lens system refracting the light flux from the image display panel; and a single convex mirror reflecting the light flux from the lens system, the lens system and the convex mirror being arranged in an order from the image display panel, such that no additional lenses are arranged between the lens system and the convex mirror; wherein: the lens system emits the light flux in a state of convergence, and the light flux in a state of convergence once converges in an optical path after an emission from the lens system to an incidence on the convex mirror, and then the light flux in a state of divergence enters the convex mirror, and a light reflection surface of the convex mirror is an aspheric or free curved surface.