Patent ID: 6734412
Filing Date: 2004-05-11
Classification: G01C,G01S

Abstract:
A position detection device, comprising:a light emitting means; a light sending means for sending out emitted light, which comes from the light emitting means, to a target object; a two-dimensional light receiving means for receiving reflected light coming from the target object to convert the reflected light into an electric charge; and an arithmetic processing means that determines a position of the target object on the basis of a light receiving signal from the two-dimensional light receiving means; wherein: the two-dimensional light receiving means has a function of an electronic shutter for discharging an accumulated electric charge in order to adjust the quantity of received light; and the arithmetic processing means drives the light emitting means within a period of time during which the electronic shutter is stopped and the two-dimensional light receiving means is accumulating an electric charge.