发明名称 |
Versatile Beam Scanner with Fan Beam |
摘要 |
A versatile beam scanner for generating a far-field scanned pencil beam, and, alternatively, a far-field pencil beam. An angle selector limits the angular extent of an inner fan beam emitted by a source of penetrating radiation. The source and angle selector may be translated, along a direction parallel to a central axis of a multi-aperture unit, in such a manner as to generate a scanned far-field pencil beam, when rings of apertures are interposed between the source and an inspected target, or, alternatively, a far-field fan beam, when no ring of apertures is interposed. |
申请公布号 |
US2014233707(A1) |
申请公布日期 |
2014.08.21 |
申请号 |
US201313768383 |
申请日期 |
2013.02.15 |
申请人 |
AMERICAN SCIENCE AND ENGINEERING, INC. |
发明人 |
Grodzins Lee;Schubert Jeffrey R.;Al-Kofahi Omar;Rothschild Peter J. |
分类号 |
G21K1/04 |
主分类号 |
G21K1/04 |
代理机构 |
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代理人 |
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主权项 |
1. A scanning apparatus for generating both a far-field scanned beam and a far-field fan beam for incidence upon an inspection target, the far-field scanned beam characterized by an angular extent, the apparatus comprising:
a. a source of radiation for generating an inner fan beam of radiation effectively emanating from a source axis and characterized by a width; b. an angle selector, stationary during the course of scanning, for limiting an angular extent of the inner fan beam; c. a multi-aperture unit rotatable about a central axis and interposed between the source and the inspection target during generation of the far-field scanned beam; and d. an actuator for driving the source and angle selector along a direction substantially parallel to the central axis of the multi-aperture unit in such a manner as to permit the far-field fan beam to be emitted uninterrupted by the multi-aperture unit. |
地址 |
Billerica MA US |