Attenuation zone plate
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United States of America Patent
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Nov 6, 1984
Grant Date -
N/A
app pub date -
Oct 29, 1981
filing date -
Oct 29, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An attenuation zone plate for coded-aperture imaging of a radiation source has mercury contained within a wedge-shaped chamber in a plastic housing. Reservoir and relief cavities facilitate filling the housing with mercury and accommodate changes in mercury volume. Lead plates positioned on the perimeter of the housing provide a field of view mask. In one embodiment, the housing cover pivots to vary the wedge angle. Advantages include greater facility in precision manufacturing and greater attenuation pattern flexibility.
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