Patent ID: 8643828
Filing Date: 2014-02-04
Classification: G01C,G01S

Abstract:
1. A laser surveying instrument, comprising a light source unit which has two or more light emission sources for emitting pulsed distance measuring lights with different wavelengths, a pulse driving unit for performing time sharing and emitting said pulsed distance measuring lights for every wavelength, a light projecting unit for projecting said pulsed distance measuring lights with said two or more wavelengths on an optical axis, a deflection member which is provided on said optical axis, has two or more reflection surfaces which reflect each wavelength of said pulsed distance measuring lights alone, divides said pulsed distance measuring lights for every wavelength, and deflects each of said distance measuring lights to direct an object to be measured, and a single photodetection element for receiving reflected distance measuring lights from said object to be measured, wherein a measurement of distance is performed for every pulsed distance measuring light based on a photodetection signal produced by said photodetection element.