1981-11-05
1984-02-14
Arnold, Bruce Y.
350128, G02B 2700, G03B 2160
Patent
active
044312660
ABSTRACT:
An optical refractor comprises a plate made of transparent material and having a first surface and a second surface. Segment lens elements of the same size are arranged on the first and second surface of the plate and formed integrally with the plate. The segment lens elements on the first surface are positioned in face-to-face relation with the segment lens elements arranged on the second surface, thus forming pairs of segment lens element. The segment lens elements have a common optical axis and convex surfaces, respectively. The focal lengths defined by these convex surfaces are equal. The focal point of one of the segment lens elements lies on the convex surface of the other segment lens element, and that of the other segment lens element lies on the convex surface of the first segment lens element.
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Aoba Takashi
Mori Leo
Tominaga Mamoru
Arnold Bruce Y.
Propp William
Tokyo Shibaura Denki Kabushiki Kaisha
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