Stereoimage formation apparatus and stereoimage display unit
AssigneeNippon Sheet Glass Co., Ltd.
InventorsTakahiro Hashimoto, Makoto Ikeda, Hiroyuki Nemoto
Life of this patent
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Abstract
A stereoimage formation apparatus includes two lens array plates, each of which includes microlenses having optical axes and peaks. The optical axes of the microlenses are parallel to one another. The optical axes of the microlenses in one of the lens array plates are aligned with the optical axes of the microlenses in the other lens array plate. The peaks of the microlenses in one of the lens array plates come in contact with or are located proximal to the peaks of the microlenses in the other lens array plate. The microlenses of each lens array plate each have a predetermined spherical aberration greater than a predetermined minimum spherical aberration.
Claims20
A stereoimage formation apparatus comprising:
- at least two lens array plates, each lens array plate including a plurality of microlenses, each having an optical axis and a peak, wherein:
- the optical axes of the microlenses are parallel to one another;
- the optical axes of the microlenses in one of the at least two lens array plates are aligned with the optical axes of the microlenses in the other one of the at least two lens array plates;
- the peaks of the microlenses in one of the at least two lens array plates are in contact with or located proximal to the peaks of the microlenses in the other one of the at least two lens array plates;
- and
- the microlenses of each lens array plate each have a predetermined spherical aberration greater than a predetermined minimum spherical aberration.
A stereoimage display apparatus comprising:
- an erecting-unmagnifying lens module including a plurality of microlenses, arranged uniformly with a fixed pitch, and having a focusing distance;
- and
- a display device including an image display screen, separated from the erecting-unmagnifying lens module by the focusing distance, and a plurality of pixels, arranged uniformly with a fixed pitch, wherein the image display screen displays an image, wherein:
- the erecting-unmagnifying lens module uses the image displayed on the image display screen to form a stereoimage that appears as a floating image due to binocular disparity;
- distance between the erecting-unmagnifying lens module and the image display screen is changeable within a predetermined range;
- resolution of the erecting-unmagnifying lens module changes when the distance is changed within the predetermined range;
- and
- the resolution of the erecting-unmagnifying lens module is greater than a maximum value at which a blurriness is noticeable with human eyes when the distance between the erecting-unmagnifying lens module and the image display screen is in the predetermined range.
Dependencies are inferred from the claim text.