The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 1977
Filed:
Feb. 28, 1972
Yoshio Fukushima, Tokyo, JA;
Ricoh Co., Ltd., Tokyo, JA;
Abstract
A light transmitting screen capable of directing and focusing light images falling thereon, comprising a plurality of lens systems, each having a particular optical axis, making up the screen elements and each of which transmits parallel light rays incident thereon such that the light rays emerge parallel to each other. The lens systems may be of different refractive powers and have their optical axes disposed in parallel or at varying angles with each other and all are adjacently arranged in the form of a flat, curved or segmented screen with front and rear surfaces. When light is incident upon the screen from one side, the light rays pass through and are directed by the individual systems in accordance with the arrangement of their optical axes and refractive powers, so that many varying optical and lighting effects may be achieved on the other side. Each lens system may comprise a series of suitable lens surfaces arranged on a common optical axis or an optical cylinder or fiber guide.