| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a laser scanner capable of performing stable reading in a wide reading range at a short distance and being miniaturized in a body. <P>SOLUTION: In the laser scanner for scanning a reading object surface by a laser beam and receiving the reflected light by a light receiving part to read the reading object, the light receiving part comprises a condenser lens 21 which has a wide-angle visual field and an incident plane comprising a curved surface in which a curvature in an X direction that is a reading width direction of the reading object and a curvature in a Y direction that enhances light-condensing efficiency are different from each other, and a plurality of light receiving elements 22 arranged in the X direction in the rear of the condenser lens 21. Each of the light receiving elements 22 is arranged in a manner that a light incident surface of the light receiving element 22 is inclined to a surface orthogonal to a center axis of the condenser lens 21 at a prescribed inclination angle so that a light receiving amount of the reflected light in the light receiving elements 22 arranged on both ends of the X direction is larger than that in the light receiving element 22 arranged on a central part side of the X direction. <P>COPYRIGHT: (C)2012,JPO&INPIT |
