Image display apparatus
First Claim
1. An image display apparatus comprising:
- a face-mounted unit including an image display device for displaying an image, an ocular optical system for forming an exit pupil by using a bundle of rays emitted from said image display device, and diffraction means provided between said image display device and said exit pupil; and
support means for retaining said face-mounted unit on an observer'"'"'s head,wherein said diffraction means enlarges a size of said exit pupil by diverging said bundle of rays emitted from said image display device.
1 Assignment
0 Petitions
Accused Products
Abstract
An image display apparatus, e.g., a head-mounted image display apparatus, which uses a compact optical system and yet has minimal aberrations and a large exit pupil diameter. The image display apparatus has a liquid crystal display device (2), and an ocular lens (3) for projecting an image displayed by the liquid crystal display device (2) on a user'"'"'s retina. A pair of first and second diffraction gratings (11) and (12) are provided in an optical path lying between the ocular lens (3) and an exit pupil (6) formed by the ocular lens (3). The first and second diffraction gratings (11) and (12) are arranged so that the angle of diffraction caused by the second diffraction grating (12) for each wavelength of the displayed image is approximately coincident with the angle of diffraction caused by the first diffraction grating (11).
257 Citations
14 Claims
-
1. An image display apparatus comprising:
-
a face-mounted unit including an image display device for displaying an image, an ocular optical system for forming an exit pupil by using a bundle of rays emitted from said image display device, and diffraction means provided between said image display device and said exit pupil; and support means for retaining said face-mounted unit on an observer'"'"'s head, wherein said diffraction means enlarges a size of said exit pupil by diverging said bundle of rays emitted from said image display device. - View Dependent Claims (12, 13)
-
-
2. An image display apparatus having means for displaying an image, and an ocular optical system for projecting said image on a user'"'"'s retina, said image display apparatus comprising:
-
first and second diffraction means provided in an optical path lying between said image display means and an exit pupil formed by said ocular optical system, wherein said first and second diffraction means are disposed such that an angle of diffraction caused by said second diffraction means for each wavelength of said image is approximately coincident with an angle of diffraction caused by said first diffraction means, and wherein said first and second diffraction means are arranged to enlarge said exit pupil by dividing said exit pupil into a plurality of exit pupils. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 14)
-
Specification