Patent ID: 9726760
Date: 2017-08-08
CPC Classifications: G01S

Claim:
1. A dual-directional laser rangefinder, comprising: a housing taking the form of a rectangular hollow box and having two opposite ends; a control module disposed inside the housing; a first laser module having a first laser emitting end and a first laser receiving end; a second laser module having a second laser emitting end and a second laser receiving end electrically connected to the control module, wherein the first laser module and the second laser module are respectively installed on the two opposite ends along a longitudinal direction; a display module disposed on the housing and electrically connecting to the control module; and a key module disposed on the housing and having a plurality of keys, each of which electrically connects to the control module; wherein the two laser modules emit laser beams outward in opposite directions of the housing and receive reflected laser beams from two end surfaces whose distance in between is to be determined; the control module computes respectively travel times or phase differences for the laser beams of the two laser modules, thereby calculating respectively two distances from the two laser modules to the two corresponding end surfaces and then obtaining an actual total distance between the two end surfaces.