Geodetic instrument with laser arrangement
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United States of America Patent
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Jun 25, 2002
Issued Date -
N/A
app pub date -
Aug 28, 2000
filing date -
Aug 27, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A geodetic instrument is disclosed which is set up over a ground point by a tripod and whose telescope is swivelable about a tilt axis and a rotational axis and which is outfitted with a laser arrangement for centering the rotational axis over the ground point and for determining the height h of the intersection point of the tilt axis and rotational axis over the ground point. In an instrument of the type mentioned above, a first, preferably collimated, laser beam extending in the rotational axis and at least one further laser beam path which extends divergent to the first laser beam are provided and, together, enclose an angle .gamma., and wherein there is further provided a measuring device for determining the distance a between the two laser beam paths at the height of the ground point and an evaluating device for calculating the height h of the intersection point over the ground point from the relationship h.about.a.
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