Solid state radiation detector having variable width linear electrodes
View Patent ↗A solid state radiation detector having a sub-striped electrode is provided, which is capable of effectively erasing residual images accumulating in the region adjacent to the outer edge of the first conductive layer. The detector has a planar first conductive layer; a recording photoconductive layer; a charge transport layer; a reading photoconductive layer; a striped electrode composed of multitudes of linear elements; and a sub-striped electrode composed of multitudes of linear elements. The element partly lying in the image detection area is formed to have a greater width in the non-image-detection area than in the image detection area. In addition, the element entirely lying in the region outside of the image detection area is formed to have a greater width than the width in the image detection area of the element partly lying in the image detection area.
1. A solid state radiation detector comprising a set of layers layered in the order of:
a first conductive layer which is transparent to recording light;
a recording photoconductive layer that shows photoconductivity when exposed to recording light;
a storage section that stores charges as latent image charges in accordance with the luminous energy of recording light;
a reading photoconductive layer that shows photoconductivity when exposed to reading light; and
a second conductive layer having a plurality of charge detecting linear electrodes, and a plurality of auxiliary linear electrodes,
wherein:
when viewed from the layering direction, a region having a predetermined width extending inwardly from the outer edge of the first conductive layer is defined as the non-image-detection area, and a region other than the non-image-detection area of the first conductive layer is defined as the image detection area;
the charge detecting linear electrodes and auxiliary linear electrodes are disposed alternately in the image detection area;
the charge detecting linear electrode partly lying in the image detection area is formed such that the width in the non-image-detection area or in the region adjacent to the outer edge of the first conductive layer is greater than in the image detection area; and
wherein the charge detecting linear electrode entirely lying in the region outside of the image detection area is formed to have a greater width than the width in the image detection area of the charge detecting linear electrode partly lying in the image detection area.
2. A solid state radiation detector according to claim 1 , wherein each of the plurality of charge detecting linear electrodes are spaced apart from one another along the entire length of each of the electrodes.
3. The solid state radiation detector according to claim 2 , wherein each of the plurality of auxiliary linear electrodes are spaced apart from one another along the entire length of each of the electrodes.
4. The solid state radiation detector according to claim 3 , wherein the plurality of charge detecting linear electrodes and the plurality of auxiliary linear electrodes are of an identical length.
5. The solid state radiation detector according to claim 3 , wherein the plurality of charge detecting linear electrodes extend beyond both ends of the plurality of auxiliary linear electrodes.
6. The solid state radiation detector according to claim 1 , wherein the plurality of charge detecting linear electrodes are transparent to the reading light.
7. The solid state radiation detector according to claim 6 , wherein the plurality of auxiliary linear electrodes are opaque to the reading light.
8. The solid state radiation detector according to claim 1 , wherein the auxiliary linear electrode partly lying in the image detection area is formed such that the width in the non-image-detection area or in the region adjacent to the outer edge of the first conductive layer is smaller than in the image detection area.
9. The solid state radiation detector according to claim 1 , wherein the auxiliary linear electrode partly lying in the image detection area is formed such that the width in the non-image-detection area is identical to the width in the image detection area.