Optical: systems and elements – Single channel simultaneously to or from plural channels – By partial reflection at beam splitting or combining surface
Patent
1996-10-17
1998-06-30
Epps, Georgia Y.
Optical: systems and elements
Single channel simultaneously to or from plural channels
By partial reflection at beam splitting or combining surface
359631, 359632, 359633, G02B 2714
Patent
active
057742685
ABSTRACT:
A compact, wide-field, high-resolution, low-cost and easy-to-handle head- or face-mounted image display apparatus in which unwanted light is reduced without using a polarizing member or a louver optical system. The apparatus has an image display device (1) for displaying an image; an optical system (P) for projecting the image into an observer's eyeball as an enlarged image without effecting image formation on the way to the observer's eyeball; and a device for mounting and retaining the image display device (1) and the optical system (P) on an observer's head or face i The optical system (P) is a prism optical system which has at least four surfaces, that is, a back-coated mirror (3) of positive power which is disposed to face the image display device (1), an image display device-side surface (2) facing opposite to the back-coated mirror (3), an exit surface (5) closer to the observer's eyeball, and a transmitting surface (7) facing opposite to the exit surface (5), and which is made of a transparent medium having a refractive index larger than 1. The distance between the vertex of the back-coated mirror (3) and the vertex of the image display device-side surface (2) satisfies the condition of 0.8.ltoreq..theta..sub.min /.theta..sub.max .ltoreq.1.5.
REFERENCES:
patent: 5539578 (1996-07-01), Togino et al.
Epps Georgia Y.
Lester Evelyn A.
Olympus Optical Co,. Ltd.
LandOfFree
Head- or face-mounted image display apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Head- or face-mounted image display apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head- or face-mounted image display apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1865941