Abstract
SUMMARYA microcomputer based digital imaging system was developed for a Cameca IMS‐3f ion microscope permitting real‐time digital acquisition of secondary ion images. Image signal‐to‐noise enhancement results from random noise reduction by real‐time ensemble averaging and from a reduction of pattern noise in the charge injection device (CID) array by subtraction of blank frames. Acquired images comprise 244times248 pixel arrays with 8‐bit intensity resolution. Images are displayed on a colour monitor in a grey scale or pseudo‐colour using one of four programmable lookup tables. Image processing software permits off‐line ion image enhancement and manipulation as well as multitechnique digital image correlations. System capability is illustrated by a biological example involving digital imaging studies of Al distribution in osteomalacic bone tissue, including correlative light microscopy and ion microanalysis.
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