Radiation detectors
First Claim
1. A radiation detector comprising,a plurality of first capacitors forming a two dimensional array, each said first capacitor having a discrete, charge-collection electrode,a second capacitor having a radiation-receiving surface, the second capacitor including radiation conversion means for converting radiation received at said radiation-receiving surface to electrical charge, each said first capacitor being connected electrically in series with said second capacitor and having a capacitance greater than the capacitance of said second capacitor,charge-focussing means for focussing said electrical charge produced by said radiation conversion means onto the discrete, charge-collection electrodes of said plurality of first capacitors, whereby, in operation, electrical charge accumulates on said charge-collection electrodes substantially according to the spatial distribution of the intensity of radiation received at said radiation-receiving surface,and read-out means for outputting an output signal representative of the accumulated charge on the discrete, charge-collection electrodes of said plurality of first capacitors.
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Accused Products
Abstract
A radiation detector has a dual-capacitive structure comprising an array A of first capacitors (10) including discrete electrodes (13) arranged in rows and columns and a second capacitor (20). The second capacitor (20) incorporates a radiation converter (21) which co-operates with the first capacitors (10) to cause an accumulation of charge on the discrete electrodes (13) according to the spatial distribution of radiation to which the radiation converter is exposed. Read-out means (30) is provided to output a signal representative of the accumulated charge.
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Citations
28 Claims
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1. A radiation detector comprising,
a plurality of first capacitors forming a two dimensional array, each said first capacitor having a discrete, charge-collection electrode, a second capacitor having a radiation-receiving surface, the second capacitor including radiation conversion means for converting radiation received at said radiation-receiving surface to electrical charge, each said first capacitor being connected electrically in series with said second capacitor and having a capacitance greater than the capacitance of said second capacitor, charge-focussing means for focussing said electrical charge produced by said radiation conversion means onto the discrete, charge-collection electrodes of said plurality of first capacitors, whereby, in operation, electrical charge accumulates on said charge-collection electrodes substantially according to the spatial distribution of the intensity of radiation received at said radiation-receiving surface, and read-out means for outputting an output signal representative of the accumulated charge on the discrete, charge-collection electrodes of said plurality of first capacitors.
Specification