초록 ▼

An optical system for an ocular optical system or a projection optical system, in which a plurality of illuminating light sources of different colors can be placed in a side-by-side relation to each other, and which makes it possible to reduce the overall size and weight of an apparatus such as a he

An optical system for an ocular optical system or a projection optical system, in which a plurality of illuminating light sources of different colors can be placed in a side-by-side relation to each other, and which makes it possible to reduce the overall size and weight of an apparatus such as a head-mounted image display apparatus or a color film projection apparatus. The optical system has an image-forming optical system (1) that projects a real image or virtual image of an object placed in an image plane (3). The image-forming optical system (1) has an entrance pupil (5) at a position on the side of the image plane (3) remote from the image-forming optical system. An exit pupil (4) is located in a conjugate relation to the entrance pupil (5) with respect to the image-forming optical system (1). A chromatic aberration producing device (6) is provided between the entrance pupil (5) and the exit pupil (4). Even if a plurality of illuminating light sources of different colors are placed in a side-by-side relation to each other on the entrance pupil (5), rays from the different light sources can pass the exit pupil (4), being superimposed on one another, without chromatic aberration.

대표청구항 ▼

[ What we claim is:] [1.]1. An image display apparatus comprising:a reflection type image display device adapted to form an image plane to be viewed by an observer by reflecting light rays;an illuminating device to emit light rays to illuminate said image plane; andan optical system to lead image ra

[ What we claim is:] [1.]1. An image display apparatus comprising:a reflection type image display device adapted to form an image plane to be viewed by an observer by reflecting light rays;an illuminating device to emit light rays to illuminate said image plane; andan optical system to lead image rays reflected from said reflection type image display device to an eyeball of the observer;said optical system being an image-forming optical system forming an exit pupil by forming an image of said entrance pupil at a position where said eyeball of the observer is placed;wherein said illuminating device is arranged to be capable of applying a bundle of light rays to a surface of said image display device closer to said optical system from at least a space between said image display device and said optical system;said image display apparatus further comprising:pupil-dividing means for reproducing a multiplicity of images of said entrance pupil on said exit pupil at respective positions displaced relative to each other, said pupil-dividing means being provided between said entrance pupil and said exit pupil.