Optics: eye examining – vision testing and correcting – Eye examining or testing instrument – For fusion and space perception testing
Patent
1996-05-23
1998-10-20
Mai, Huy
Optics: eye examining, vision testing and correcting
Eye examining or testing instrument
For fusion and space perception testing
348 51, A61B 308
Patent
active
058254560
ABSTRACT:
An apparatus for displaying a stereoscopic image including right-eye and left-eye image display devices displaying right-eye and left-eye images, respectively, right-eye and left-eye magnifying lenses forming enlarged virtual right-eye and left-eye images, respectively, an eye point camera for detecting a point in a sight at which a viewer gazes, a parallax calculating circuit for deriving a parallax of the gazed point, a image shift amount calculating circuit for calculating an amount of image shift in accordance with the parallax, and an image shift circuits for shifting the right-eye and left-eye images horizontally in opposite direction by the same amount such that a distance of convergence with respect to the gazing point is substantially fixed. It is preferable to shift the right-eye and left-eye images such that the distance of convergence becomes substantially equal to a viewing distance from eyes of the viewer to a virtual image plane.
REFERENCES:
patent: 4895431 (1990-01-01), Tsujiuchi et al.
patent: 5034809 (1991-07-01), Katoh
patent: 5233458 (1993-08-01), Moffitt et al.
patent: 5357293 (1994-10-01), Uomori et al.
patent: 5510832 (1996-04-01), Garcia
Iba Yoichi
Tabata Seiichiro
Mai Huy
Olympus Optical Company Ltd.
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