Patent Number: 061880736
Section: claims

1. A radiographic intensifying screen comprising a support, a phosphor layer containing phosphor and a surface protective layer overlaid in order, wherein the surface protective layer shows a scattering length in the range of 5 to 80 .mu.m, said scattering length being measured at main wavelength of light emitted from the phosphor. 2. The radiographic intensifying screen of claim 1, wherein the scattering length is in the range of 10 to 70 .mu.m. 3. The radiographic intensifying screen of claim 1, wherein the surface protective layer contains light-scattering fine particles having a mean grain size of 0.1 to 1 .mu.m and a refractive index of not less than 1.6. 4. The radiographic intensifying screen of claim 1, wherein the surface protective layer contains light-scattering fine particles having a mean grain size of 0.1 to 1 .mu.m and the refractive index of not less than 1.9. 5. The radiographic intensifying screen of claim 1, wherein the surface protective layer contains light-scattering fine particles comprising at least one material selected from the group consisting of zinc oxide, zinc sulfide, titanium dioxide and lead carbonate, and the particles have a mean grain size of 0.1 to 1 .mu.m. 6. The radiographic intensifying screen of claim 1, wherein the surface protective layer comprises a binder containing fluorocarbon resin and light-scattering fine particles dispersed therein. 7. The radiographic intensifying screen of claim 1, wherein the surface protective layer comprises a binder containing polyester resin and light-scattering fine particles dispersed therein. 8. The radiographic intensifying screen of claim 1, wherein the surface protective layer has a thickness of 2 to 12 .mu.m. 9. The radiographic intensifying screen of claim 1, wherein the surface protective layer has a thickness of 3 to 9 .mu.m. 10. The radiographic intensifying screen of claim 1, wherein the phosphor contained in the phosphor layer has the following formula: EQU M.sub.2 O.sub.2 X:Tb 11. The radiographic intensifying screen of claim 1, wherein a light-reflecting layer is provided between the support and the phosphor layer. 12. The radiographic intensifying screen of claim 1, wherein the phosphor layer comprises a binder and the phosphor dispersed therein, and the weight ratio of the binder to the phosphor is in the range of 1/12 to 1/200. 13. The radiographic intensifying screen of claim 1, wherein the phosphor layer comprises a binder and the phosphor dispersed therein, and the weight ratio of the binder to the phosphor is in the range of 1/16 to 1/100.