公开(公告)号：US3919527A

公开(公告)日：1975-11-11

申请号：US38278373

申请日：1973-07-26

Applicant: IBM

Inventor： BOWEN ARLEN J ,  DICKSON LEROY D ,  GORETZKI JEROME A ,  HENDRICKSON KENNETH E ,  KING DONALD P ,  KUEPER TERRANCE W ,  SODERSTROM RONALD L

IPC: G02B26/10 ,  G06K7/10 ,  G08C9/06

CPC classification number: G06K7/10871

Abstract: An omnidirectional optical scanner scans bar coded labels passed relative to a rectangular scan window with a plurality of interlaced X''s whereby the labels are completely scanned irrespective of their orientation. The interlaced X''s are generated from a laser light source directed onto a first oscillating mirror for deflecting the light beam in a horizontal direction at a slow frequency. A second oscillating mirror is positioned to further deflect the light beam in a vertical direction at a higher frequency. The horizontal and vertical frequencies are set at a particular ratio so that the X''s overlap and the scan on the return passes midway between the legs of a previous scan. The horizontal and vertical amplitudes are controlled by horizontal and vertical photo detectors located adjacent the scan window which provide inputs to amplitude control circuits to assure an orthogonal pattern by keeping the crossing angle constant. The oscillating mirrors are phase and frequency locked by a precision digital system to assure phase lock stability and thereby prevent voids in the scan pattern. The scan window crops out the end portions of the scan pattern. Generally, the most linear parts of the scan pattern, but including the turn around portions of the scans within the scan window are used. However, in one embodiment, end mirrors fold the end portions of the scan pattern outside of the window into the scan window toward the center thereof to enhance the scanning of certain labels.

Abstract translation: 全向光学扫描仪扫描相对于具有多个交错X的矩形扫描窗口传送的条形编码标签，由此标签被完全扫描，而不管其取向如何。

公开(公告)号：CA1241119A

公开(公告)日：1988-08-23

申请号：CA502490

申请日：1986-02-21

Applicant: IBM

Inventor： ANTONELLI DOUGLAS C ,  BRANSCOMB PATRICIA M ,  BROOCKMAN ERIC C ,  DICKSON LEROY D ,  KOPPEL CARALEE P ,  OSSOWSKI RICHARD ,  STOKES OLEN L JR

IPC: G06K7/016 ,  G06K7/10

Abstract: METHOD OF INHIBITING PROCESSING OF DUPLICATIVE CODED LABEL SIGNALS A system is disclosed for preventing processing of duplicative coded label signals generated by a scanner lacking item detectors. The system establishes a variable lockout time as a function of operator performance. Any detected label candidate which duplicates a candidate received within the lockout time is assumed to be duplicative. Any transfer to the terminal is inhibited. Operator performance is tracked by measuring the inter-item arrival times for candidates actually transferred to the terminal. The inter-item arrival times are averaged over a given number of items. The average value is used to select a lockout time which is generally proportional to the average inter-item arrival time.

公开(公告)号：CA1172077A

公开(公告)日：1984-08-07

申请号：CA399062

申请日：1982-03-23

Applicant: IBM

Inventor： DICKSON LEROY D

IPC: G06K7/12 ,  G02B5/32 ,  G02B26/10 ,  G06K7/10 ,  G02B27/00

Abstract: RA981004 HOLOGRAPHIC SCANNER DISC WITH DIFFERENT FACET AREAS A scan pattern for a bar code scanner is produced by the combination of a coherent light source, a rotating disc with holographic facets and an array of fixed, beam folding mirrors. Light reflected from a bar code label follows a retroreflective path to a photodetector within the scanner, To reduce variations in the amount of light collected through different facets, the areas of the facets are varied as a function of beam elevation and beam path length.

公开(公告)号：CA1175265A

公开(公告)日：1984-10-02

申请号：CA411879

申请日：1982-09-21

Applicant: IBM

Inventor： DICKSON LEROY D

IPC: G02B5/32 ,  G02B26/10 ,  G03H1/04 ,  G03H1/20 ,  G02B27/17

Abstract: RA981018 METHOD FOR MAKING HOLOGRAPHIC OPTICAL ELEMENTS WITH HIGH DIFFRACTION EFFICIENCIES Production quantities of a multi-element holographic scanner disc are made by optically replicating a silver halide master disc one element at a time in a dichromated gelatin film. The dichromated gelatin film swells during processing. The swell is monitored during production by determining the shift in the angle of the Bragg surfaces within the gel. The angle of the replicating beam for each element is changed from that of the original reference beam to establish a Bragg angle at exposure which will be tilted to the proper angle after swelling in order to maximize the diffraction efficiency of the element at the original reference beam angle.

公开(公告)号：CA1173964A

公开(公告)日：1984-09-04

申请号：CA413678

申请日：1982-10-18

Applicant: IBM

Inventor： DICKSON LEROY D ,  PIERCE CHARLES M ,  STOKES OLEN L ,  WOODLAND NORMAN J

IPC: G06K7/016 ,  G06K7/10 ,  G06K9/82

Abstract: METHOD FOR CONTROLLING THE OPERATION OF AN OPTICAL SCANNER An optical scanner in a retail store checkout stand includes a single item detector upstream of the scanner window. Output signals from the item detector and from symbol recognition logic are used to open and close a shutter in the beam path of the scanner laser. The shutter is opened and a first time out sequence is started when the beam path is interrupted. A second, short time out sequence is restarted each time a valid symbol is recognized. A third time out sequence of intermediate length supersedes the first time out sequence when the beam path is cleared. The laser shutter is closed and the symbol is transferred to a terminal or controller upon the completion of and active time out sequence or upon recognition of a predetermined number of identical symbols, whichever comes first.

公开(公告)号：CA1248230A

公开(公告)日：1989-01-03

申请号：CA536699

申请日：1987-05-08

Applicant: IBM

Inventor： DICKSON LEROY D

IPC: G02B26/10 ,  G06K7/015 ,  G06K7/10 ,  G06K7/12

Abstract: Optical Scanner for Reading Bar Codes Detected Within a Large Depth of Field This disclosure describes a technique for reading bar codes scanned by focussed scan lines having different focal lengths where at least one of the scan lines has a beam that is small relative to irregularities of the surface on which the label appears. The scan lines are generated using a holographic disk so as to have a predetermined focal length and focal zone. The focal zone of each generated scan line overlaps the focal point of at least one adjacent scan line. Any bar code label which might be scanned by a beam so small that it would be degraded by surface scatter noise is also scanned by a slightly larger beam. The slightly larger beam "averages out" the surface scattering noise to produce a smoother or cleaner return signal.

公开(公告)号：CA1143194A

公开(公告)日：1983-03-22

申请号：CA376959

申请日：1981-05-06

Applicant: IBM

Inventor： DICKSON LEROY D

IPC: G02B27/00

Abstract: RA978010 HOLOGRAPHIC SYSTEM FOR GENERATING DUAL SCAN PATTERNS An optical scanner includes a rotating glass disk having an annular track of sectorial holographic diffraction gratings or holofacets. The holofacets deflect an impinging laser beam along arcuate scan lines. The beam which sweeps along these scan lines is redirected by beam folding mirrors to create specific scan patterns focused in predetermined regions adjacent a scanner window. Similar or dissimilar scan patterns can be generated depending upon the characteristics of the holofacets and the placement of the beam folding mirrors. The scan patterns can be focussed at different distances from the scanner window to increase the size of the "gate" through which a label must pass in order to be successfully scanned.

公开(公告)号：CA1051553A

公开(公告)日：1979-03-27

申请号：CA203370

申请日：1974-06-25

Applicant: IBM

Inventor： BOWEN ARLEN J ,  DICKSON LEROY D ,  GORETZKI JEROME A ,  HENDRICKSON KENNETH E ,  KING DONALD P ,  KUEPER TERRANCE W ,  SODERSTROM RONALD L

IPC: G02B26/10 ,  G06K7/10 ,  G08C9/06

Abstract: An omnidirectional optical scanner scans bar coded labels passed relative to a rectangular scan window with a plurality of interlaced X's whereby the labels are completely scanned irrespective of their orientation. The interlaces X's are generated from a laser light source directed onto a first oscillating mirror for deflecting the light beam in a horizontal direction at a slow frequency. A second oscillating mirror is positioned to further deflect the light beam in a vertical direction at a higher frequency. The horizontal and vertical frequencies are set at a particular ratio so that the X's overlap and the scan on the return passes midway between the legs of a previous scan. The horizontal and vertical amplitudes are controlled by horizontal and vertical photo detectors located adjacent the scan window which provide inputs to amplitude control circuits to assure an orthogonal pattern by keeping the crossing angle constant. The oscillating mirrors are phase and frequency locked by a precision digital system to assure phase lock stability and thereby prevent voids in the scan pattern. The scan window crops out the end portions of the scan pattern. Generally, the most linear parts of the scan pattern, but including the turn around portions of the scans within the scan window are used. However. in one embodiment, end mirrors fold the end portions of the scan pattern outside of the window into the scan window toward the center thereof to enhance the scanning of certain labels.