NASA NTRS · 19630000072
Mirror device aligns machine surface perpendicular to sight lines
Abstract
A sight alignment device is used to align two machines so that an axis of the first machine is parallel to a flat surface on the second. This sighting device depends on the reflection of a light beam from the surface to be aligned.
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Kissler, H. R.. 1964-05-01. Mirror device aligns machine surface perpendicular to sight lines. https://ntrs.nasa.gov/citations/19630000072
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