Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1985-06-24
1987-08-04
DeMeo, Palmer C.
Electric lamp and discharge devices
Cathode ray tube
Screen
313372, 313526, 350 9627, H01J 2918, H01J 3112, G02B 608
Patent
active
046848460
ABSTRACT:
The invention relates to luminescent screen comprising an optical fibre plate formed by the reunion of elementary optical fibres constituted by bars of core glass (10) enveloped by a cladding glass (12), the optical fibre plate being provided with cavities obtained after having hollowed out partially the core glass. The bottom of the cavities is covered by a deposit of a restoring material (30) which is transparent to the luminous flux, improving the surface state and the flatness of the bottom of the cavities and tending to minimize the break (32) at the intersection between the bottom and the wall of each cavity. The restoring material preferably has an optical index near that of the core glass in order to ensure the optical continuity. Said screen of high resolution and high luminous efficiency is used in display tubes such as night-vision tubes, X-ray converter tubes, slid scanning tubes, cathode ray tubes used in oscilloscopy or in television.
REFERENCES:
patent: 4264408 (1981-04-01), Benham
patent: 4436366 (1984-03-01), Abramson
Baudry Hugues
Duchenois Valere
Fouassier Michele
DeMeo Palmer C.
Fox John C.
O'Shea Sandra L.
U.S. Philips Corporation
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