| 摘要 |
PURPOSE:To obtain an input face for exciting X-ray having considerably improved resolution and an electron tube having such input face by providing a fiber glass plate comprised of clad section for reflecting the light and core section for passing the light and an input fluorescent face composed of alkali halide phosphor material crystal pole. CONSTITUTION:The substrate or fiber glass plate 3 is comprised of a clad section 4 for reflecting the light and plural core sections 5 for passing the light where the core section 5 is projected from X-ray incident face side 6 and provided with an input fluorescent face. The input fluorescent face 7 is constructed with alkali halide CsI phosphor material crystal pole 8 and light shield/reflection film 9 formed at the core section 5, and upon incident of X-ray, it is converted into the light through CsI phosphor material crystal pole 8. Said light is reflected efficiently by the crystal pole 8, especially by said film 9 then transmitted through the core section 5 onto X-ray image tube to provide resolution approximately same with the fineness of the core section 5.
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