OPTICAL SCANNER, CODE READER AND BAR CODE READER HAVING INCREASED DEGREE OF FREEDOM IN PLACEMENT OF OPTICAL PARTS

摘要

The present invention provides a multi-head optical scanning device which can realize a more complete 360 ​​° reading is used for bar code reading device, in particular by reducing the thickness. ; The optical scanning apparatus of the present invention includes a light detection device is accommodated in the main body of the bottom portion, substantially perpendicular to the bottom side, a light source, a polygon mirror, a side. A light beam from the light source and to project a substantially perpendicular direction with respect to the bottom surface, and a polygon mirror has a rotation axis in substantially parallel positions relative to the bottom surface. The optical scanning apparatus increases the degree of freedom of arrangement of the need eliminated, each pattern mirror to install a mechanism for an injection in the bottom, and further provides a scanning pattern that can improve reading ability using the scan pattern emitted from the bottom do. ; The scan pattern, read, the code