| 摘要 |
PURPOSE:To prevent the deterioration of the image contrast by forming a covering material on the surface of the opposite side to the phosphor layer side of a fiber plate in a concave structure against a core material. CONSTITUTION:A fiber plate (optical fiber file plate) 17 becoming a substrate is made of many fibers (element fiber), and each fiber is constituted with a core material 171, a covering material 172, and an absorber 173. And, the covering material 172 on the surface (outgoing side of light) on the opposite side to the phosphor layer 10 side of the fiber plate 17 is formed in a recess structure against the core material 171. In addition, an inorganic or organic light absorbing layer 174, for example, is provided on the recessed portion 175 of this recess strcuture. An output phosphor layer 10 made of the grain-like phosphor or deposited phosphor is formed on the opposite surface (incident side of light) to the above recess structure of the fiber plate 17, and a metal-backed layer 11 is provided on this output phosphor layer 10. |
