X-ray absorption filter having a field generating matrix and field sensitive liquids
US5878111A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1997 |
| Grant date | Mar 2, 1999 |
| Priority date | — |
| Expiry date | Sep 22, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG21K1/10
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Filter (3) for absorbing X-rays (2), having a controllable field-generating matrix arranged on a housing (7). The matrix generates electric or magnetic fields acting on liquids (13, 14) located in the housing. The housing (7) has at least one first and one second chamber (9, 10) which are separated in a sealed fashion from one another by means of a flexible diaphragm (8). The first and second liquids (13, 14) are located in the first and second chambers (9, 10) respectively, and differ in their X-ray absorption characteristics. At least one of the liquids is a magneto-rheological or an electro-rheological liquid, depending on the type of matrix provided. In operation, a minimum pressure is applied to at least one of the liquids, and the localized fields produced by the matrix cause the liquids (13, 14) to alter their respective thickness ratios, to provide a an X-ray filter having location-specific absorption characteristics.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.