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US 2007/0182938 A1Published application
Image projection apparatus
AssigneeKonica Minolta Opto, Inc.
InventorMasayuki Imaoka
Life of this patent
Estimating the term…
Abstract
A projector includes a plane mirror that is disposed at one end side of an end portion of a screen and a projection optical system that is disposed at a position that is separated from a reflection surface side of the plane mirror. A light shielding plate is provided to at least one of two positions; one is between a fourth mirror and the plane mirror of the projection optical system, and the other is between the plane mirror and the screen.
Claims14
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.
3 more elements
An image projection apparatus, comprising:
- an image display element for displaying a two-dimensional image;
- a projection optical system for projecting an image on the image display element to a screen from an oblique direction;
- a plane mirror for reflecting image light from the projection optical system toward the screen;
- and
- a light shielding member, wherein
- the projection optical system includes a reflection type optical element disposed at a position that is closest to the screen on the optical path in the projection optical system,
- the plane mirror is disposed at one end side of the screen in a position substantially perpendicular to the screen surface, and
- the light shielding member is disposed at a position that is close to an intersection of an optical paths of first image light that is projected from the projection optical system via the plane mirror to an end portion of the screen facings the plane mirror and second image light that is projected from the projection optical system via a plane mirror to an end portion of the screen facing opposed to an end portion of the screen facing the plane mirror, and that is located outside the optical path of the projection optical system and adjacent to the optical paths of the first image light and the second image light.
5 more elements
Dependencies are inferred from the claim text.