Radiation image detector
View Patent ↗A radiation image detector with improved readout efficiency. The detector records a radiation image by generating and storing electric charges when irradiated with radiation, and the image is read out by irradiating readout light. The detector includes first line electrodes and second line electrodes disposed alternately with each other. An opaque line insulator that blocks the readout light is provided on each side face extending in the longitudinal direction of each second line electrode. The insulator has a width smaller than the distance between the first and second line electrodes. This arrangement allows the electric charges in the area of the photoconductive layer adjacent to the side faces of the first line electrodes to be fully discharged, and the electric charges in the area of the photoconductive layer adjacent to the side faces of the second line electrodes to be prevented from discharging.
1. A radiation image detector comprising a layer structure that includes the following layers in the order listed below:
a charge storage layer that generates and stores electric charges when irradiated with a recording electromagnetic wave representing a radiation image;
a photoconductive layer that generates electric charges when irradiated with readout light; and
an electrode layer including a plurality of first line electrodes that transmits the readout light and a plurality of second line electrodes that blocks the readout light disposed alternately in parallel with each other at a predetermined distance, wherein:
each of the plurality of second line electrodes includes an opaque line insulator that blocks the readout light and is provided on each side face extending in the longitudinal direction thereof; and
the opaque line insulator has a width which is smaller than the distance between the first and second line electrodes.
2. The radiation image detector according to claim 1 , wherein:
the photoconductive layer further generates electric charges when irradiated with erasing light for erasing residual charges remaining in the charge storage layer; and
the opaque line insulator transmits the erasing light.
3. A radiation image detector comprising a layer structure that includes the following layers in the order listed below:
a charge storage layer that generates and stores electric charges when irradiated with a recording electromagnetic wave representing a radiation image;
a photoconductive layer that generates electric charges when irradiated with readout light; and
an electrode layer including a plurality of first line electrodes that transmits the readout light and a plurality of second line electrodes that blocks the readout light disposed alternately in parallel with each other at a predetermined distance, wherein:
each of the plurality of second line electrodes includes an opaque line insulator that blocks the readout light only at a side region adjoining each side face extending in the longitudinal direction thereof, and a third line electrode for electrically connecting the area of the photoconductive layer adjacent to the opaque line insulators along the upper face thereof and the upper face of the opaque line insulators; and
a maximum width of the opaque line insulator measured from the side face extending in the longitudinal direction of the second line electrode is smaller than the distance between the first and second line electrodes.
4. The radiation image detector according to claim 3 , wherein:
the photoconductive layer further generates electric charges when irradiated with erasing light for erasing residual charges remaining in the charge storage layer; and
the opaque line insulator transmits the erasing light.
5. The radiation image detector according to claim 4 , wherein the third line electrode transmits the erasing light.