公开(公告)号：AT456104T

公开(公告)日：2010-02-15

申请号：AT03797063

申请日：2003-12-17

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： DVORKIS PAUL ,  BREYTMAN ALEX ,  KRICHEVER MARK ,  CARLSON BRAD ,  SHI TSI

IPC: G06K7/10 ,  G01J1/00 ,  G02B5/00 ,  G06K7/00 ,  G06K19/14 ,  G06T15/50 ,  G06V30/224

Abstract: Several optical systems for imaging engines of imaging optical code readers are disclosed. Each optical system includes the abilities to change the depth of field of the imaging field and to adjust a focus quality of the imaging field. The disclosed structures for changing the depth of field of the disclosed optical systems allow for the automatic or manual selection of one of a plurality of depths of field.

公开(公告)号：AT434796T

公开(公告)日：2009-07-15

申请号：AT03797062

申请日：2003-12-17

Applicant: SYMBOL TECHNOLOGIES INC

Inventor： BREYTMAN ALEX ,  KRICHEVER MARK ,  CARLSON BRADLEY ,  SHI TSI ,  YAVID DMITRIY

IPC: G06K7/10 ,  G01B9/02 ,  G01B11/02 ,  G01B11/16 ,  G01C3/00 ,  G01S17/46 ,  G02B7/04 ,  G02B7/09 ,  G06K7/00 ,  G06K19/14 ,  G06V30/224

Abstract: An image scanning device is provided which includes a system for determining the distance to a target to be scanned. The image scanning device includes an optical system and an image sensor array for focusing a light beam and imaging the target. The device preferably includes an automatic focusing system for adjusting the position of the optical system in order to adjust the focal point, and thereby focus the image of the target onto the image sensor array. In one embodiment of the image scanning device, the distance is determined by analyzing a collimated aiming pattern formed by collimating the light beam. In another embodiment, the distance is determined by analyzing a speckle pattern caused by the speckle effect upon the light beam hitting the target.