OUTDOOR RANGE FINDER

摘要

The invention intends to provide an equipment capable of measuring a distance with a low power laser even in the outdoors. The range finder of the invention comprises: a laser emitting means (101) that emits a pulse laser beam to an object to be measured, an image reading means (105, 106) that takes in an image of the object synchronously with an emission and stop of the laser beam, a means (107) that detects "a minimum value of differential images" between the images read by a plurality of emissions and stops of the laser beam, a means (108, 110) that determines a binary threshold from the minimum value of the differential images, and a means (114) that makes a binary data from the minimum value of the differential images, and detects a position where the laser beam is received.