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. 07, 1985
Filed:
Feb. 01, 1982
Applicant:
Inventor:
Mitchell Aron, Harrington Park, NJ (US);
Assignee:
Allied Corporation, Morris Township, Morris County, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; H04N / ;
U.S. Cl.
CPC ...
350397 ; 358 61 ; 358253 ;
Abstract
An optical filter device is disclosed made up of a specially designed bandpass filter and a circularly polarizing filter and is typically used in front of the faceplate of a cathode ray tube in a high intensity ambient light environment, such as with navigation displays in some aircraft cockpits, to reduce the high intensity ambient light striking the phosphor of the cathode ray tube and thus effect a reduction in the level of the scattered light that causes a washout of the display thereon, thereby permitting observation of the display on the tube.