| 摘要 |
<p>PURPOSE: To provide a scanner without a mirror by providing a laser element, an optical element and a sensor element, mounting one of them movably back and forth to the others and moving a mounting means and one element back and forth. CONSTITUTION: An assembly 28 is provided with a laser diode 32, a hollow tube 30 and a lens barrel 34 and the lens barrel is provided with a diaphragm and extended and contracted inside the hollow tube. Converged beams are passed through the window 40 of a housing and emitted. A supporting body 26 and the assembly 28 are turned by the back and forth turning of a motor shaft 22, a light spot forms an arc provided with the center of curvature on the diode 32, crosses a symbol on a reference surface and is swept and the need of a conventional mirror is eliminated. Laser reflected light from the symbol is passed through the window 42, received in a photosensor 44 and processed in a signal processing circuit 52 and a control circuit 53. A display device 55, a panel 56 and a battery 58 are connected through a cable connector 54, the laser diode 32, a motor 20, the sensor 44, the signal processing circuit and the control circuit 53 are operated by the operation of a trigger 60 and the symbol is read.</p> |
