초록 ▼

A compact and lightweight visual display apparatus having high resolution and a large exit pupil diameter, which enables observation of an image that is flat and clear as far as the edges of the visual field at a wide viewing angle of 30°or more using a planar two-dimensional image display device. T

A compact and lightweight visual display apparatus having high resolution and a large exit pupil diameter, which enables observation of an image that is flat and clear as far as the edges of the visual field at a wide viewing angle of 30°or more using a planar two-dimensional image display device. The apparatus uses a concentric optical system which provides a flat image surface (4) as an ocular optical system. The concentric optical system has at least two semitransparent reflecting surfaces (2 and 3) which have respective centers of curvature disposed in the vicinity of a pupil (1) and which have respective concave surfaces directed toward the pupil. The semitransparent reflecting surfaces are disposed so that each semitransparent reflecting surface transmits light rays at least once and reflects them at least once.

대표청구항 ▼

A visual display apparatus comprising: first image display means for displaying a first image; and a first ocular optical system for projecting said first image formed by said first image display means and for leading said first image to a first eye of an observer, said first ocular optical system c

A visual display apparatus comprising: first image display means for displaying a first image; and a first ocular optical system for projecting said first image formed by said first image display means and for leading said first image to a first eye of an observer, said first ocular optical system comprising at least one lens including: a first semitransparent reflecting surface which has a first center of curvature substantially on an optical axis of said at least one lens, a concave surface directed toward said center of curvature, a second semitransparent reflecting surface which has a second center of curvature at approximately a same position with respect to said optical axis as said first center of curvature, and a single concentric optical system disposed between said first semitransparent reflecting surface and said second semitransparent reflecting surface, said single concentric optical system being formed of a medium having an index of refraction greater than 1.