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US 8,933,419 B2Granted
Fibre optic phosphor screen comprising an angular filter
AssigneePhotonis France
InventorsGert Nuetzel, Pascal Lavoute, Christophe Fontaine
Life of this patent
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Abstract
An optical fiber phosphor screen including a thin film phosphor layer and an optical fiber faceplate, allowing interfering light in a cladding of the optical fibers to be reduced. The phosphor screen includes an angular filter including at least one layer arranged between the thin film phosphor layer and the optical fiber faceplate.
Claims21
An optical fiber phosphor screen comprising:
- a thin film phosphor layer and an optical fiber faceplate including optical fibers assembled in a bundle and oriented along a thickness of the faceplate, each optical fiber comprising a core of optical index nC surrounded by a cladding of optical index nG, said thin film phosphor layer being arranged on a face of the faceplate;
- and
- an angular filter comprising at least one layer, arranged between said thin film phosphor layer and said face of the faceplate, such that a light ray emitted by the thin film phosphor layer and passing through the angular filter penetrates into the core of an adjacent optical fiber with an angle of refraction less than or equal to π/2−arcsin(nG/nC).
Dependencies are inferred from the claim text.