发明名称 |
X or gamma ray generation apparatus with small cross-section and variable position. |
摘要 |
The invention relates to an arrangement for generating an X-ray or gamma beam with small cross-section and variable direction, having an X-ray or gamma emitter, from the focus of which a bundle of rays emerges, and a diaphragm arrangement, which cuts out a beam from the bundle of rays and comprises a hollow-cylindrical first diaphragm body which is rotatable about its axis of symmetry and has two mutually offset helical slits on the circumference. In this arrangement, an X-ray beam with at least approximately square cross-section is cut out on a relatively long hollow-cylindrical body with small diameter by the slits winding around the diaphragm body in at least one turn each and being shaped in such a way that at least one straight line runs through the slits towards the focus, the position of which line can be varied by turning the diaphragm body. |
申请公布号 |
EP0389033(B1) |
申请公布日期 |
1994.10.26 |
申请号 |
EP19900200571 |
申请日期 |
1990.03.12 |
申请人 |
PHILIPS PATENTVERWALTUNG GMBH;N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
HARDING, GEOFFREY, DR.;MERKELBACH, PETRUS;THISSEN, FRANCISCUS, L.A.M. |
分类号 |
G21K1/00;G21K1/04;G21K5/02;H05G1/00 |
主分类号 |
G21K1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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