Geometrical instruments – Straight-line light ray type – Level
Reexamination Certificate
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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Greenblum & Bernstein P.L.C.
PENTAX Corporation
Smith R. Alexander
LandOfFree
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