X-ray image intensifier
An X-ray image intensifier includes an input surface (l8) and an output surface (20) facing the input surface. The input surface has a base (28) and a phosphor layer (30) formed on the base and have a predetermined effective radius. The phosphor layer includes a thickest portion (30a) which has a th...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | An X-ray image intensifier includes an input surface (l8) and an output surface (20) facing the input surface. The input surface has a base (28) and a phosphor layer (30) formed on the base and have a predetermined effective radius. The phosphor layer includes a thickest portion (30a) which has a thickness about l05 to ll5% of a thickness of a center of the layer and is located in a region spaced from the center toward the periphery of the layer by a distance about 60 to 80% of the effective radius. The phosphor layer is formed so that the thickness is gradually increased from the center to the thickest portion and a region between the thickest portion and the periphery of the layer has a thickness about 50 to l00% of the thickness of the thickest portion |
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