IMAGE DISPLAY APPARATUS

摘要

An image display apparatus includes a projection unit configured to project an image and a plurality of concave reflectors in which contact surfaces with optical axes of the concave reflectors with respect to the optical axis of the projection unit are disposed at different angles from one another. A first concave reflector of the plurality of concave reflectors reflects at least a portion of an image projected by the projection unit to form a first image based on the image. A second concave reflector of the plurality of concave reflectors transmits a portion of an image projected by the projection unit and reflects a portion of the image to form a second image based on the image.

主权项

1. An image display apparatus, wherein:
a projection image of a projector is formed as a first image of size d0 on an angularly uniform diffusion film or on a normal diffusion film; a condensing lens with a focal length f0 is installed to be adhered to the diffusion film; one or a plurality of image-forming lenses with a lens pupil diameter d1 at a synthetic focal length f1: ((1/a)+(1/b)=(1/f1)) is installed at a distance of approximately f0=a from the condensing lens; an aerial real image of the first image is formed at a distance of approximately b from a main plane of the image-forming lens with a magnification factor of approximately b/a by the image-forming lens; a plurality of transparent concave reflectors each with a focal length f2: ((1/b)+(1/c)=(1/f2)) and reflectance of about 4% to 50% is stacked at intervals at which the plurality of transparent concave reflectors are able to come into contact with one another by changing angles formed between one another by approximately θ1: (θ1≧(1/2)tan−1(d1/b)) near the aerial image having a size of approximately (b/a) d0; an aerial image of a lens pupil of the image-forming lens with a size (c/b)d1, which has a magnification factor of approximately c/b, is formed at a distance of approximately c in a direction of a main reflection ray of each of the transparent concave reflectors; and an infinite pentagonal viewing area is formed when (c/b)d1≧(b/a)d0 in front of and behind the aerial image of the lens pupil and a diamond-shaped viewing area is formed when (c/b)d1<(b/a)d0 in front of and behind the aerial image of the lens pupil.