公开(公告)号：CA1202132A

公开(公告)日：1986-03-18

申请号：CA386759

申请日：1981-09-28

Applicant: XEROX CORP

Inventor： SCIFRES DONALD R ,  SPRAGUE ROBERT A

IPC: G02F1/03 ,  G02F1/05 ,  G02F1/29 ,  G09G3/02

Abstract: An electrooptical scanning device for deflection of an optical beam of light across an image plane. The device comprises a body of electrooptical crystal material and a periodic array of parallel, spaced electrodes associated with one surface of the body. A light beam entering the crystal body is caused to interact with electric fields established at the one surface by step applied voltages to the electrode array that influence the deflection of the light beam at the moment of total internal reflection at the one surface. By varying the magnitude of the applied voltages across the electrodes, a corresponding approximation of a desired phase retardation can be produced along the phase front of the light beam. The phase retardation across the light beam can be designed to produce a linear phase front angled beam or can be designed to produce a curvalinear phase front forming a focused spot at the image plane. With the changing of the magnitude of the applied voltages across the electrode array, the beam or spot may be made to move about or scan across the image plane.

公开(公告)号：DE3172434D1

公开(公告)日：1985-10-31

申请号：DE3172434

申请日：1981-09-17

Applicant: XEROX CORP

Inventor： TURNER WILLIAM D ,  SPRAGUE ROBERT A

IPC: B41J2/465 ,  G02F1/315 ,  G06K15/12 ,  H04N1/40 ,  G02F1/03 ,  B41J3/20 ,  G02F1/31

公开(公告)号：AU543324B2

公开(公告)日：1985-04-18

申请号：AU7525581

申请日：1981-09-15

Applicant: XEROX CORP

Inventor： TURNER WILLIAM D ,  SPRAGUE ROBERT A

IPC: B41J2/465 ,  G02F1/315 ,  G06K15/12 ,  H04N1/40 ,  G02F1/03 ,  G03B27/32 ,  G03G15/04

公开(公告)号：DE3168763D1

公开(公告)日：1985-03-21

申请号：DE3168763

申请日：1981-07-03

Applicant: XEROX CORP

Inventor： SPRAGUE ROBERT A

IPC: H04N1/19 ,  G06T1/00 ,  H04N1/195 ,  H04N1/48 ,  H04N1/028 ,  H04N9/04

公开(公告)号：CA1178326A

公开(公告)日：1984-11-20

申请号：CA383070

申请日：1981-07-31

Applicant: XEROX CORP

Inventor： SPRAGUE ROBERT A

IPC: B41J2/46 ,  B41J2/44 ,  B41J2/445 ,  B41J2/465 ,  G02F1/03 ,  G03G15/04 ,  G03G15/22 ,  G06K15/12 ,  B41J3/20

Abstract: In an electro-optic line printer having a light valve comprising an electro-optic element with a plurality of individually addressable electrodes, sample and hold circuits maintain the data samples for each line of an image on the electrodes for essentially a full line printing time to increase the exposure contrast. A multiplexer may be used to ripple the data samples of a serial data stream onto the electrodes, and the polarity of the data samples applied to the electrodes may be occasionally reversed to prevent optical damage to the electro-optic element. Moreover, a pair of longitudinally displaced and laterally staggered electrode arrays may be used in light valves which rely on fringe fields to avoid electrode aligned blind spots.

公开(公告)号：CA1176742A

公开(公告)日：1984-10-23

申请号：CA391761

申请日：1981-12-08

Applicant: XEROX CORP

Inventor： SPRAGUE ROBERT A

IPC: B41J2/44 ,  G02F1/03 ,  G02F1/29 ,  G03G15/04 ,  G06K15/12 ,  H04N1/036 ,  H04N1/23

Abstract: A thick film line modulator/scanner (50) for use in an electrooptic line printer (14). A light valve utilizes a thin electro-optic layer (212) with the index of refraction of the layer being higher than the neighboring material so that the light can be guided in it. A laser beam (48) is focused into the layer, the beam expanding sideways so that a sheet of collimated light is provided. This light is affected by an array of electrodes (240, 242), consisting of an extended set of individually addressed metal fingers (240) on one side of the film (212), and a broad electrode (242) on the other side of the film. This broad electrode could also be segmented to the individually addressed electrodes. The light diffracted by this electrode set is reimaged onto the recording medium (14) with the zero order diffracted light blocked out, so that each electrode acts as a light modulator for one picture element on the output.

公开(公告)号：GB2136733A

公开(公告)日：1984-09-26

申请号：GB8405737

申请日：1984-03-05

Applicant: XEROX CORP

Inventor： STARKWEATHER GARY K ,  SPRAGUE ROBERT A

IPC: B41J2/46 ,  B41J11/44 ,  G02F1/03 ,  G02F1/05

Abstract: A position or velocity encoder 52 with a digital pulse output is used to synchronize the timing of a printing device with the motion of the photoreceptor or copy sheet 50. The medium may be xerographic, and the printing device may be a full line optical printer. The printer may be an ink-jet printer.

公开(公告)号：DE69841296D1

公开(公告)日：2010-01-07

申请号：DE69841296

申请日：1998-08-03

Applicant: XEROX CORP

Inventor： SPRAGUE ROBERT A

IPC: G02B6/00 ,  G02B6/08 ,  G02B6/04 ,  G02F1/1335 ,  G09F9/30 ,  H01J29/89

Abstract: Optical plates which have columnar features approximately in the direction of light propagation which are capable of total internal reflection, a controllable numeric aperture (NA) at input and output surfaces, rotational azimuthal averaging and translation of the object plane from a back surface of the plate to a front surface of the plate and are optical equivalent of a FOFP (fiber optic foreplate). These plates are made from a composition of irradiation sensitive glass (40) which has been etched in either the columnar features (are areas)(64) or the surrounding features (cladding areas)(66). If the surrounding features have been etched, the etched areas are filled with either a low melt glass or plastic or a light blocking material such as a black composition material. If the columnar features have been etched the etched areas are filled with a low melt glass or plastic.

公开(公告)号：DE69627977T2

公开(公告)日：2003-11-27

申请号：DE69627977

申请日：1996-12-27

Applicant: XEROX CORP

Inventor： JACKSON WARREN B ,  BERLIN ANDREW A ,  BIEGELSEN DAVID K ,  APTE RAJ B ,  SWARTZ LARS-ERIK ,  SPRAGUE ROBERT A

IPC: B65G51/03 ,  B65H5/22 ,  B65H29/24 ,  B65H7/02 ,  B65H9/16

Abstract: A fluid transport system for moving flexible objects includes a conveyor configured to direct fluid flow against opposite sides of flexible objects. A sensor unit senses motion state of flexible objects, and a motion analysis unit is connected to the sensor unit to calculate relative or absolute movement of flexible objects based on the motion state. Overall movement, position, velocity, and orientation of flexible objects can be determined, as well as internal movement of the object attributable to flexure or edge curling. A motion control unit is connected to the motion analysis unit to modify fluid flow directed against opposite sides of flexible objects, accurately adjusting motion of flexible objects.

公开(公告)号：DE69625163T2

公开(公告)日：2003-05-08

申请号：DE69625163

申请日：1996-12-11

Applicant: XEROX CORP

Inventor： TURNER WILLIAM D ,  SPRAGUE ROBERT A

IPC: B42D9/04 ,  G03B27/62 ,  G03G15/00 ,  H04N1/00 ,  H04N1/04 ,  H04N1/10 ,  H04N1/195

Abstract: The book imager (2) includes a support (4), for placement of a book (6) in an open position, an imager (12) having opposed imaging surfaces capable of simultaneously imaging the entire exposed, facing adjacent pages of the book in a distortion preventing manner, and an air jet page turning system. The support and the imager are relatively movable toward and away from one another, from one position in which imaging is effected, to another in which page turning is effected. The air jet page turning system includes a fluffing jet for separating pages, a pick-off jet for separating the topmost page from the fluffed pages, a force applying jet for urging the topmost page into intimate contact with the imaging device and a page turning jet for driving the topmost page to the opposite side of the book.