NASA NTRS · 19690000510
Circuit board hole coordinate locator concept
Abstract
Fixed light source registers the x and y coordinates of holes in a fixed opaque template. A first surface parabolic mirror and a set of photocells are used to detect the passage of light through the individual holes.
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Samuel, L. W.. 1969-11-01. Circuit board hole coordinate locator concept. https://ntrs.nasa.gov/citations/19690000510
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