Patent ID: 7394917

Claim:
A ball trajectory measuring apparatus, comprising: a first camera for photographing a back of a flying ball; a second camera for photographing a front of the flying ball; a third camera which is present in a position placed apart from a segment connecting the first camera to the second camera; and a calculating portion for calculating time series data on position coordinates of the ball based on a comparison between an image obtained by the first camera and an image obtained by the second camera and a comparison between the image obtained by the first camera and an image obtained by the third camera; wherein a part of an angle of view of the first camera or the second camera and a part of an angle of view of the third camera overlap with each other and the angle of view of the third camera is related to the angle of view of the first camera or the second camera based on a ball image obtained by the first camera or the second camera and a ball image obtained by the third camera, and wherein the third camera is located after the drop point of the flying golf ball at a position offset from the second camera.