Accession Number : ADD000024

Title :   Low-Reflection Filter for Cathode Ray Tube Face Plate.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Sach, Gary M

Report Date : 18 Sep 1973

Pagination or Media Count : 4

Abstract : The patent describes a filter which permits a high contrast ratio to be obtained for operation of a CRT in intense ambient light and comprises a faceplate sandwich bonded to the viewing side of the phosphor coated CRT glass. The filter includes two layers of tempered glass, having a circular polarizer sandwiched between them. The layer of tempered glass attached to the CRT glass is covered with a conductive, neutral density, specular-reflective, filter coating. The filter coating may be connected to a conductive annular ring, which ring surrounds the other piece of tempered glass. This connection serves the dual purpose of providing an RFI shield and a Faraday shield.

Descriptors :   *CATHODE RAY TUBE SCREENS, *PATENTS, *OPTICAL FILTERS, POLARIZING FILTERS, ANTIREFLECTION COATINGS, NICKEL ALLOY INCONEL, SANDWICH CONSTRUCTION, ELECTROMAGNETIC SHIELDING

Subject Categories : Recording and Playback Devices

Distribution Statement : APPROVED FOR PUBLIC RELEASE