公开(公告)号：JPH05182009A

公开(公告)日：1993-07-23

申请号：JP14719092

申请日：1992-06-08

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： POORU DOBUOOKISU ,  DEIBUITSUDO PII GOOREN ,  GUREN ESU SUPITSUTSU ,  DANIERU AARU MATSUGURIIN

IPC: G06K7/10

Abstract: PURPOSE: To easily read two-dimensional bar codes. CONSTITUTION: A narrow first raster scanning pattern is formed by projecting a raster light beam upon a target. A user can manually direct the light beam 151 to a desired position by pointing the light beam at the position by using the first raster scanning pattern. A raster scanning system is provided with a scanner which emits the raster light beam and a second raster scanning pattern which sweeps all codes to be read and has a relatively wide width and a detector 158 which receives reflected light 152 from bar codes 170 and generates corresponding electric signals.