Luminescent screen with grid structure for X-ray image intensifi

Details Luminescent screen with grid structure for X-ray image intensifi Luminescent screen with grid structure for X-ray image intensifi

1980-07-18

1983-02-01

Segal, Robert

Electric lamp and discharge devices

Secondary emission prevention

Nonemissive material

250213VT, H01J 4000, G01T 120

Patent

active

043718060

ABSTRACT:
In the exemplary embodiments, the luminescent layer is applied to a carrier exhibiting a grid which is applied in the manner known per se in applying photo grids. Thereby, however, it is disadvantageous that the grid interstices exhibit only a small depth, so that the grid structure disappears as the luminescent layer is applied with increasing thickness. In order to avoid this disadvantage, the disclosure provides that the carrier also be etched after application of the grid, so that the grid interstices receive the shape of enlarged recesses of greater depth. The luminescent layer applied to this grid then retains the grid-like interruptions even given a greater thickness. An inventive luminescent screen receives improved image transmission properties and is particularly suited for employment as an X-ray (image intensifier) luminescent screen in medical X-ray diagnostics.

REFERENCES:
patent: 3783298 (1974-01-01), Houston
patent: 4147949 (1979-04-01), Yang
patent: 4239791 (1980-12-01), Sonoda et al.

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