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Cognex Corp. - Smart Sensor 3-24 GIF LB
Photonics Dictionary

image storage panel

A modified form of an image-retaining panel that can be used in subdued daylight. This is achieved by adding a layer of zinc oxide between the panel's phosphor layer and its rear electrode. The zinc oxide cannot be made photoconductive by low-intensity daylight but becomes so when exposed to x-rays. An electroluminescent image is obtained by the application of AC voltage to the panel following its exposure to the x-rays.
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