Radiographic image conversion screens
    2.
    发明授权
    Radiographic image conversion screens 失效
    射线照相图像转换屏幕

    公开(公告)号:US4486486A

    公开(公告)日:1984-12-04

    申请号:US429031

    申请日:1982-09-30

    IPC分类号: A61B6/00 G21K4/00 B32B7/02

    摘要: A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Y.sub.i, Tb.sub.a, R.sub.b).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Gd and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01, respectively.

    摘要翻译: 一种放射照相图像转换屏幕,包括支撑体,形成在支撑体上的第一荧光层,并且基本上由蓝色发光荧光体和形成在第一荧光层上的第二荧光层组成,并且基本上由绿色发射的稀土氧硫化物荧光体组成。 绿色发射稀土氧硫化物荧光体由下式表示:(Ln1-i,Yi,Tba,Rb)2O2S其中Ln是选自La,Gd和Lu中的至少一种元素,R是至少一种元素 选自由Dy,Pr,Yb和Nd组成的组,i,a和b是0≤i≤0.35,0.0005, b