OPTICAL INFORMATION READING APPARATUS

摘要

Disclosed is a code symbol reading apparatus (100) that reads a code symbol (41) on a subject to be read (40) by having an image of the subject to be read (40) picked up and analyzed by means of an image pickup sensor (11). A laser light source (14) and an irradiation optical system (15) are provided as irradiation means for radiating guide marks to the subject to be read (40), said guide marks indicating image pickup resolution of the image pickup sensor (11). The irradiation means are preferably means which radiate a plurality of radially diffusing light beams such that the guide marks at equal intervals are formed on the subject to be read (40).