Computer graphics processing and selective visual display system – Image superposition by optical means – Operator body-mounted heads-up display
Patent
1998-05-27
2000-08-01
Hjerpe, Richard A.
Computer graphics processing and selective visual display system
Image superposition by optical means
Operator body-mounted heads-up display
345 7, 359630, 359631, G09G 500, G02B 2714
Patent
active
060973544
ABSTRACT:
An image display apparatus capable of providing a clear observation image at a wide field angle by using an ocular optical system including an optical element having a minimal number of constituent surfaces. The apparatus includes an image display device (5) which displays an image, and an ocular optical system (4) which projects the image formed by the image display device (5) and leads the image to an observer's eyeball (3). The ocular optical system (4) has two surfaces, i.e. a first surface (11) and a second surface (12). A space formed by the two surfaces is filled with a medium having a refractive index larger than 1. At least one surface of the ocular optical system (4) is a non-rotationally symmetric aspherical surface decentered or tilted with respect to an observer's visual axis (2). The first surface (11) is a transmitting surface which serves as both an entrance surface for light rays emitted from the image display device (5) and an exit surface through which the light rays exit from the ocular optical system (4). The first surface (11) is convex toward the observer.
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Takahashi Junko
Takahashi Koichi
Dinh Duc
Hjerpe Richard A.
Olympus Optical Co,. Ltd.
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