Patent ID: 7982171

Claim:
A detection sensor to detect a receiving position of laser light, comprising: a plurality of light receiving element arrays arranged adjacent each other, each including a plurality of light receiving elements arranged at intervals in line wherein adjacent light receiving elements in each light receiving element array are mutually connected via a resistor, and output lines are connected to light receiving elements arranged at opposite ends of each of the light receiving element arrays; and an analysis arithmetic device connected to the plurality of light receiving element arrays; wherein the plurality of light receiving element arrays are arranged such that, for each adjacent pair of light receiving element arrays, a light receiving element of ene a first light receiving element array is positioned between light receiving elements of a second light receiving element array; and the output line for each of the plurality of light receiving element arrays is respectively connected to the analysis arithmetic device, and, when a laser beam makes contact with at least one of the light receiving elements, the analysis arithmetic device is configured to obtain a light receiving position of the laser beam, by way of a computation, in accordance with an output that is obtained from an output line of at least one light receiving element which is in contact with the laser beam, wherein the plurality of light receiving element arrays include a central light receiving element array and two light receiving element arrays respectively arranged at opposite sides of the central light receiving element array, and wherein the two light receiving element arrays are positioned symmetrically with regard to the central light receiving element.