Patent ID: 7187434
Filing Date: 2007-03-06
Classification: G01C,G01S

Abstract:
1. A surveying apparatus, comprising: an irradiation portion provided with an objective lens, and for irradiating a ranging light toward a measured object; a ranging portion for measuring a distance based on a reflection light reflected by the measured object and entered through the objective lens; a collimation optical system portion for collimating the measured object through the objective lens; an image processing device configured to obtain a collimation image through the objective lens; a memory, which alternately stores the image obtained by the image processing device; and a determination device configured to compare the alternately stored images, wherein the determination device determines whether or not a moving obstacle has passed a projection optical path of the ranging light during the irradiation of the ranging light based on a compared image, eliminates a ranging result of the ranging portion when it is determined that the moving obstacle cuts across the projection optical path, and outputs a re-ranging command toward the ranging portion such that the ranging portion performs re-ranging, when the ranging data is eliminated.