Surveying instrument

Details Surveying instrument Surveying instrument

2006-06-06

2006-06-06

Smith, R. Alexander (Department: 2859)

Geometrical instruments

Straight-line light ray type

Level

C033S292000, C033SDIG021

Reexamination Certificate

active

07055253

ABSTRACT:
A surveying instrument includes a surveying instrument body rotatable about each of a vertical axis and a horizontal axis; and a first collimator optical system and a second collimator optical system each of which is positioned in the surveying instrument body to collimate the surveying instrument relative to a survey point, a viewing angle of the second collimator optical system being smaller than a viewing angle of the first collimator optical system. A first collimating operation is performed with the first collimator optical system before a second collimating operation is performed with the second collimator optical system.

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patent: 2004/0090612 (2004-05-01), Kaneko et al.
patent: 3039801 (2000-03-01), None

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