The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 1997
Filed:
Dec. 21, 1994
Applicant:
Inventor:
Keiichi Kuba, Hachiojo, JP;
Assignee:
Olympus Optical Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
359637 ; 359633 ;
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.