Patent ID: 7078720
Filing Date: 2006-07-18
Classification: G01B,G01S

Abstract:
1. A range finder for measuring a three-dimensional geometry of an object, comprising: a projector unit for projecting pattern light onto the object; a first image capturing unit for capturing an image reflected from the object; a second image capturing unit for capturing an image reflected from the object; an identical principal point arrangement unit; and an imaging optical system; wherein the second image capturing unit is arranged so as to assume a principal point optically differing from that of the first image capturing unit; the identical principal point arrangement unit arranges the projector unit and the first image capturing unit at a position of an optically identical principal point; the imaging optical system is shared between the projector unit and the first image capturing unit; and the imaging optical system has a zooming unit and is configured such that a fixed positional relationship exists between the principal point of the projector unit and that of the image capturing system when a zooming ratio has been changed by the zooming unit.