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Surveying instrument

  • US 5,767,952 A
  • Filed: 11/30/1995
  • Issued: 06/16/1998
  • Est. Priority Date: 12/09/1994
  • Status: Expired due to Term
First Claim
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1. A surveying instrument, comprising an object to be irradiated having a prism for measuring distance and a target arranged at a predetermined interval from said prism, a range finder or a range finding angle measuring instrument having a range finder and a projection system having a laser emitting source, said projection system being parallel to said range finder, at said predetermined interval, and adapted to emit a laser beam toward said object to be irradiated, driving means for driving said laser emitting source of said projection system, and control means for controlling the emitting condition of said laser beam by said driving means based on distance data from said range finder to said object to be irradiated.

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