公开(公告)号：JPS61243578A

公开(公告)日：1986-10-29

申请号：JP663986

申请日：1986-01-17

Applicant: IBM

Inventor： ANTONELLI DOUGLAS CHARLES ,  BRANSCOMB PATRICIA ,  BROOCKMAN ERIC CHARLES ,  DICKSON LEROY DAVID ,  KOPPEL CARALEE ,  OSSOWSKI RICHARD ,  STOKES OLEN LEE

IPC: G06K7/016 ,  G06K7/10

公开(公告)号：JPS63175821A

公开(公告)日：1988-07-20

申请号：JP26296387

申请日：1987-10-20

Applicant: IBM

Inventor： CATO ROBERT THOMAS ,  DICKSON LEROY DAVID ,  FORTENBERRY ROBERT SCOTT

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

公开(公告)号：DE3782593D1

公开(公告)日：1992-12-17

申请号：DE3782593

申请日：1987-07-14

Applicant: IBM

Inventor： DICKSON LEROY DAVID

IPC: G02B5/32 ,  G02B26/10 ,  G03H1/20

Abstract: A multi-faceted holographic disk can be copied in a one-step process by using a source disk (18), actually a sandwich of two thin film layers (28, 44) of photosensitive material. The first thin film layer (28) is capable of producing multiple reference beams simultaneously. The second thin film layer (44) is a "master" copy of the disk to be copied. Both layers are produced using known off-axis holographic techniques. A target disk (20), having an unexposed film (54) of photosensitive material is located adjacent the second thin film layer (44). The source disk (18) is illuminated with coherent light (58), preferably in the form of a conical beam with an apparent point of origin on an axis through the common centers of the source and target disks.

公开(公告)号：DE3481646D1

公开(公告)日：1990-04-19

申请号：DE3481646

申请日：1984-12-04

Applicant: IBM

Inventor： CATO ROBERT THOMAS ,  DICKSON LEROY DAVID ,  STOKES JR

IPC: G06K7/12 ,  G02B26/10 ,  G06K7/10 ,  H04N1/113 ,  G02B5/32

Abstract: Operating parameters for a multiple facet holographic disc scanner are adjusted on real time basis as a function of the actual diffraction efficiency of the facet region aligned with the impinging laser beam. The operating parameters are adjusted to achieve optimum signal levels independent of facet characteristics. Diffraction efficiency is inversely related to zero order beam power for a given level of input beam power. A photodetector measures the zero order beam power. The output of this photodetector is used to control video amplifier gain and/or semiconductor laser current.

公开(公告)号：DE3688890D1

公开(公告)日：1993-09-23

申请号：DE3688890

申请日：1986-03-11

Applicant: IBM

Inventor： ANTONELLI DOUGLAS CHARLES ,  BRANSCOMB PATRICIA ,  BROOCKMAN ERIC CHARLES ,  DICKSON LEROY DAVID ,  KOPPEL CARALEE ,  OSSOWSKI RICHARD ,  STOKES OLEN LEE

IPC: G06K7/016 ,  G06K7/10

Abstract: 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：DE2431973C3

公开(公告)日：1977-05-05

申请号：DE2431973

申请日：1974-07-03

Applicant: IBM

Inventor： BOWEN ARLEN JOHN ,  DICKSON LEROY DAVID ,  GORETZKI JEROME ARNOLD ,  HENDRICKSON KENNETH EARL ,  KING DONALD PAUL ,  KUEPER TERRANCE WAYNE ,  SODERSTROM RONALD LEE

IPC: G02B26/10 ,  G06K7/10

公开(公告)号：DE69118291D1

公开(公告)日：1996-05-02

申请号：DE69118291

申请日：1991-09-05

Applicant: IBM

Inventor： LUECKE FRANCIS STEPHEN ,  DICKSON LEROY DAVID

IPC: G11B7/004 ,  G11B7/09 ,  G11B7/125 ,  G11B7/13 ,  G11B7/135 ,  G11B7/14 ,  G11B11/105

公开(公告)号：DE3787570T2

公开(公告)日：1994-05-11

申请号：DE3787570

申请日：1987-04-16

Applicant: IBM

Inventor： DICKSON LEROY DAVID

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

公开(公告)号：DE2431973B2

公开(公告)日：1976-09-16

申请号：DE2431973

申请日：1974-07-03

Applicant: IBM

Inventor： BOWEN ARLEN JOHN ,  DICKSON LEROY DAVID ,  GORETZKI JEROME ARNOLD ,  HENDRICKSON KENNETH EARL ,  KING DONALD PAUL ,  KUEPER TERRANCE WAYNE ,  SODERSTROM RONALD LEE

IPC: G02B26/10 ,  G06K7/10 ,  G06K7/14

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.

公开(公告)号：DE2330188A1

公开(公告)日：1974-01-17

申请号：DE2330188

申请日：1973-06-14

Applicant: IBM

Inventor： DICKSON LEROY DAVID

IPC: G02B5/32 ,  G02B27/10 ,  G03H1/00 ,  G02B27/00

Abstract: The optical system divides a beam of coherent radiation into a pair of beams having powers according to a desired ratio. The primary beam is intercepted by a holographic diffraction grating positioned at approximately the Bragg angle, placing virtually all the diffracted energy into the 0th and the selected one of either the +1st or -1st diffraction orders.