Title:
【発明の名称】X線イメ-ジ管
Document Type and Number:
Japanese Patent JP2514952
Kind Code:
B2
Abstract:
An X-ray image intensifier comprises a vacuum envelope having an input window, through which X-rays are incident on said vacuum envelope, an input fluorescent screen (8) for converting the X-rays into light rays, a photoelectric layer for converting the light rays into electrons, an anode and a focusing electrode forming an electron lens for accelerating and focusing the electrons and an output fluorescent screen for converting the electrons accelerated and focused by the electron lens into a visible image. The input fluorescent screen (8) includes of a first phosphor layer (22) having a first density and a second phosphor layer (24) having a second density higher than the first density. The second phosphor layer (24) is placed on that side of the first phosphor layer (22) which faces the photoelectric layer. The thickness of the second phosphor layer (24) is greater at the peripheral areas than the central part of the input fluorescent screen (8).
Inventors:
KUBO HIROSHI
Application Number:
JP5674087A
Publication Date:
July 10, 1996
Filing Date:
March 13, 1987
Export Citation:
Assignee:
TOKYO SHIBAURA ELECTRIC CO
International Classes:
G21K4/00; H01J29/38; H01J31/50; H05G1/64; (IPC1-7): H01J29/38; H01J31/50
Domestic Patent References:
| JP51131264A | ||||
| JP5631049B2 |
Attorney, Agent or Firm:
Takehiko Suzue (2 outside)