公开(公告)号：JPH03132887A

公开(公告)日：1991-06-06

申请号：JP23432490

申请日：1990-09-04

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： JIEROOMU SUUOOTSU ,  HAWAADO EMU SHIEPAADO ,  ERITSUKU EFU BAAKAN ,  MAAKU JIEI KURITSUSHIEBUAA ,  BORISU METORITSUKII ,  EDOWAADO BAAKAN ,  ASAKUSANDAA EMU AADERUSON

IPC: G06K7/10

Abstract: PURPOSE: To make a scanning head face a mark to be read by providing a means for generating incident laser light beams into the scanning head and an optical means guiding the beams to the mark. CONSTITUTION: When a switch is operated with a light source which can be started, a semiconductor laser diode 42, for example, one of head parts generates the incident laser light beams. The laser diode 42 is fitted to a printed circuit board 48. The optical device fitted in the head is arranged to be adjusted by the laser diode 42 so that it optically corrects the incident laser light beams and it faces a prescribed reference face in front of a projection part outside the head along a first optical path. The optical device has a long and optical cylinder 50, and a cylindrical bore 52 accepts a circular casing part and holds it so that it does not move. A lens barrel 54 is fitted so that it can move in a vertical direction. Thus, a user can easily make the scanning head turn to the mark.