Patent ID: 6765653
Filing Date: 2004-07-20
Classification: G01C,G01S

Abstract:
An electronic distance meter comprising:a sighting telescope having an objective lens for sighting an object; a reflection member provided behind said objective lens, wherein said reflection member is positioned so as to be eccentric with respect to an optical axis of said objective lens, said reflection member including a reflection surface which intersects with said optical axis of said objective lens; an optical distance meter for determining the distance to said object, said optical distance meter including a light-transmitting optical system for transmitting a measuring light via said reflection member and said objective lens, and a light-receiving optical system for receiving a portion of said measuring light which is reflected by said object, subsequently passed through said objective lens, and not obstructed by said reflection member, wherein said measuring light projected toward said object via said light-transmitting optical system travels toward said object along an optical path which is eccentric with respect to said optical axis of said objective lens; and a measuring-light incident position changing device for changing an incident point of a central axis of said measuring light on said reflection surface of said reflection member between a first incident point on said reflection surface away from a point of intersection of said reflection surface and said optical axis of said objective lens, and a second incident point on said reflection surface substantially on said point of intersection.