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:
Nov. 19, 1985
Filed:
Dec. 12, 1983
Applicant:
Inventor:
Richard L Cohen, Matawan, NJ (US);
Assignee:
Allied Corporation, Morris Township, Morris County, NJ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ;
U.S. Cl.
CPC ...
3502 / ;
Abstract
A directional filter for ambient light is constructed from a thin base strip (2) of indeterminate length and having an opaque surface (4). The strip is wound into a roll (8) having a plurality of convolutions (10) and sections (12, 14, 16 and 18) are cut from the face of the roll. A pair of sections are disposed so that their convolutions are in an orthogonal configuration, and are sandwiched between a pair of glass plates (20, 22) having non-reflective outside surfaces (20A). Channels (24) are thereby provided, which impart directional characteristics to the ambient light.