Image display apparatus

Details Image display apparatus Image display apparatus

1994-12-21

1997-08-26

Epps, Georgia Y.

Optical: systems and elements

Single channel simultaneously to or from plural channels

By partial reflection at beam splitting or combining surface

359633, G02B 2714

Patent

active

056616040

ABSTRACT:
A compact, lightweight and wide-field head-mounted image display apparatus which is effectively corrected for chromatic aberration. The apparatus includes an image display device (1) for displaying an image, a concave mirror (2) provided to face the image display device (1) to project the displayed image into an eyeball pupil (E) as an enlarged image, and a half-mirror (3) disposed between the image display device (1) and the concave mirror (2). A diffraction optical element (20) having reciprocal dispersion characteristics is disposed somewhere in the optical path to correct chromatic aberration.

REFERENCES:
patent: 4269476 (1981-05-01), Gauthier et al.
patent: 5303221 (1994-04-01), Maeda et al.
Chapters VI and VII of "Small Sized Optical Elements For Optical Designers", published by Optics, Inc., pp. 88-121.
New Methods of Designing Holographic Optical Elements, William C. Sweatt SPIE vol. 126 Clever Optics (1977) pp. 46-53.

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