公开(公告)号：ZA9102756B

公开(公告)日：1992-04-29

申请号：ZA9102756

申请日：1991-04-12

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： METITSKY BORIS ,  BORIS METITSKY ,  SWARTZ JEROME ,  JEROME SWARTZ ,  BARKAN EDWARD ,  EDWARD BARKAN ,  SHEPARD HOWARD M ,  HOWARD M SHEPARD ,  GOREN DAVID ,  DAVID GOREN ,  BIUSO TONY ,  TONY BIUSO

IPC: G02B26/10 ,  G06K7/10 ,  G06K

CPC classification number: G06K7/10881 ,  G06K2207/1013

公开(公告)号：ZA912756B

公开(公告)日：1992-04-29

申请号：ZA912756

申请日：1991-04-12

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： METITSKY BORIS ,  BORIS METITSKY ,  SWARTZ JEROME ,  JEROME SWARTZ ,  BARKAN EDWARD ,  EDWARD BARKAN ,  SHEPARD HOWARD M ,  HOWARD M SHEPARD ,  GOREN DAVID ,  DAVID GOREN ,  BIUSO TONY ,  TONY BIUSO

IPC: G02B26/10 ,  G06K7/10 ,  G06K

Abstract: A portable scanning head emits and receives light from a light-emitting diode (10) to read symbols, such as bar-code symbols. The optics (12,18) within the scanner are operative for focusing a light beam (11) and the view of a light sensor (17) in different planes (13,22) exteriorly of a scanner housing. Imaging means are provided in the unit for imaging a viewing window. The viewing window has an area smaller than that of the scan spot. The system can employ an LED (10) as a light source and tolerate the relatively large-sized (on the order of millimeters) scan spot without sacrificing reading performance since the photodiode (17) "sees" only that portion of the scan spot visible through the viewing window.