EP0410992A1 - Scanner for scanning an original document - Google Patents

Scanner for scanning an original document

Info

Publication number
EP0410992A1
EP0410992A1 EP19890904524 EP89904524A EP0410992A1 EP 0410992 A1 EP0410992 A1 EP 0410992A1 EP 19890904524 EP19890904524 EP 19890904524 EP 89904524 A EP89904524 A EP 89904524A EP 0410992 A1 EP0410992 A1 EP 0410992A1
Authority
EP
European Patent Office
Prior art keywords
ccd
lens system
scanner
unit
section
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
EP19890904524
Other languages
German (de)
French (fr)
Inventor
Kaj O. Nielsen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oce Helioprint AS
Helioprint AS
Original Assignee
Oce Helioprint AS
Helioprint AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oce Helioprint AS, Helioprint AS filed Critical Oce Helioprint AS
Publication of EP0410992A1 publication Critical patent/EP0410992A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1021—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components using a lead screw or worm
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/10—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces
    • H04N1/1013—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using flat picture-bearing surfaces with sub-scanning by translatory movement of at least a part of the main-scanning components
    • H04N1/1039—Movement of the main scanning components
    • H04N1/1043—Movement of the main scanning components of a sensor array
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/387—Composing, repositioning or otherwise geometrically modifying originals
    • H04N1/393—Enlarging or reducing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
    • H04N1/19—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays
    • H04N1/191—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa using multi-element arrays the array comprising a one-dimensional array, or a combination of one-dimensional arrays, or a substantially one-dimensional array, e.g. an array of staggered elements
    • H04N1/192—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line
    • H04N1/193—Simultaneously or substantially simultaneously scanning picture elements on one main scanning line using electrically scanned linear arrays, e.g. linear CCD arrays

Definitions

  • the invention relates to a scanner for optical scanning an original, more specifically a scanner by which it is possible to change the reproduction ratio of the original in connection with the scanning.
  • Scanners of various types are known and a typical representative of such scanners is disclosed in EP patent No. 00366020, according to which the apparatus Includes a linear CCD-unit moved in the focussing plane of a fixed lens for scanning the image of the original generated in the focussing plane.
  • Said scanner suffers, however, from the essential drawback that the distance between the CCD-unit and the optical centre of the lens and between the original and the centre is fixed. In this way, only one reproduction ratio can be achieved with a given lens because a change of the reproduction ratio implies either a change of the lens or use of a zoom-type lens. This implicates, however, that the scanner does not always function so that its optimum resolution is utilized.
  • the purpose of the invention is to provide a scanner allowing for arbitrarily choosing reproduction ratios within a predetermined range without changing the lens and so that the scanner always functions, to utilize its optimum resolution.
  • This purpose is fulfilled according to the invention by constructing the guide rails of the scanner as specified in the characterizing portion of claim 1. By means of this structure it is possible with one lens system to achieve a large range of reproduction ratios while maintaining the resolution of the scanner.
  • the drawing illustrates the most important parts of the scanner comprising mainly an original table 1, a first movable section 2 and a second movable section 3.
  • the movable section 2 is arranged to move perpendicular to the original table 1 and is guided in this movement by the guide rail 4 and driven in this movement by a motor 5 driving a spindle 6.
  • Spindle 6 is in engagement with a nut secured on section 2. This nut is not illustruated in the drawing.
  • Section 3 may likewise be moved in a direction perpendicular to original table 1 guided by guide rail 4 operated by a motor 7 mounted on section 2.
  • Motor 7 operates a spindle 8 engaging a nut 9 mounted on section 3.
  • Section 3 carries an objective 10 for focussing an image of an original 11, placed on the original table, on a CCD-unit 12 forming part of a CCD-module 13 mounted on section 2. This CCD-module will be described in further detail in the following.
  • sections 2 and 3 may be moved in a direction perpendicular to original table 1. This movement is controlled by a common guide rail 4 and the movements are propelled by motors 5 and 7.
  • motors 5 and 7 As a focussing on the CCD-unit of original 11 placed on original table 1 is always wanted, irrespective of the reproduction ratio, there must always be a predetermined relation between the distances between section 3 and original table 1 and section 3 and section 2.
  • the CCD-module 13 comprises a CCD- unit 12, a motor 14, a spindle 15 and guiding means 16.
  • Motor 14 serves to displace CCD-unit 12 in the focussing plane of objective 10 by means of spindle 15, thereby allowing for scanning the image of original 11.
  • the printed circuit board 17 on which the CCD-unit is mounted also carries circuits for preprocessing the signals from the CCD-unit.
  • Motors 5, 7 and 14 are all so-called stepper motors and by the utilization of the generally known properties of such motors it is possible to position the individual sections in mutual relationship by counting the number of drive pulses fed to the motors.
  • a common guide rail 4 which as shown may include two vertically positioned parallel H-profiles 18, 19 whose oppositely facing internal rails 20, 21 serve as guide rails for the first section, e.g. unit 3, while the external rails 22, 23 facing away from each other serve as guide rails for the second section, e.g. unit 2, it is achieved that the guiding members, e.g.
  • the wheels 24, 25, for the respective sections 2, 3 can be placed approximately at the same level on guide rails 4, and it is further advantageous that the two sections track with each other if some small curvilinear or linearity irregularities occur in guide rails 4, thereby ensuring that objective 10 and CCD-unit 12 always occupy the same position in relation to each other.

Abstract

L'invention concerne un système de guidage de dispositif optique (3) et une section (2) à scanner CCD (à couplage de charge) dans un scanner permettant l'analyse d'un original. Ladite section CCD (2) et le dispositif optique (3) ont un mouvement commandé par le même rail de guidage (4) entraîné par des moteurs (5 et 7) par l'intermédiaire d'axes (6 et 8). Le montage de l'axe (8) et du moteur (7) destinés au dispositif optique (3), sur la section (2) à scanner CCD, permet de modifier le rapport de reproduction à l'intérieur d'une plage prédéterminée sans changer la lentille et tout en utilisant au maximum la résolution optique de la section CCD.The invention relates to an optical device guiding system (3) and a section (2) for CCD (charge coupled coupling) scanning in a scanner for analyzing an original. Said CCD section (2) and the optical device (3) have a movement controlled by the same guide rail (4) driven by motors (5 and 7) via axes (6 and 8). The mounting of the axis (8) and the motor (7) intended for the optical device (3), on the section (2) to be CCD scanner, makes it possible to modify the reproduction ratio within a predetermined range without change the lens and while using the optical resolution of the CCD section to the maximum.

Description

Scanner for scanning an original document.
The invention relates to a scanner for optical scanning an original, more specifically a scanner by which it is possible to change the reproduction ratio of the original in connection with the scanning.
Scanners of various types are known and a typical representative of such scanners is disclosed in EP patent No. 00366020, according to which the apparatus Includes a linear CCD-unit moved in the focussing plane of a fixed lens for scanning the image of the original generated in the focussing plane. Said scanner suffers, however, from the essential drawback that the distance between the CCD-unit and the optical centre of the lens and between the original and the centre is fixed. In this way, only one reproduction ratio can be achieved with a given lens because a change of the reproduction ratio implies either a change of the lens or use of a zoom-type lens. This implicates, however, that the scanner does not always function so that its optimum resolution is utilized. The purpose of the invention is to provide a scanner allowing for arbitrarily choosing reproduction ratios within a predetermined range without changing the lens and so that the scanner always functions, to utilize its optimum resolution. This purpose is fulfilled according to the invention by constructing the guide rails of the scanner as specified in the characterizing portion of claim 1. By means of this structure it is possible with one lens system to achieve a large range of reproduction ratios while maintaining the resolution of the scanner.
By structuring the mechanical system as specified in the characterizing portion of claim 2 the move ments of at least the second spindle becomes very short, thereby considerably reducing the time of adjustment.
The invention will now be described in further detail with reference to the drawing showing a perspective view of the scanner according to the invention.
The drawing illustrates the most important parts of the scanner comprising mainly an original table 1, a first movable section 2 and a second movable section 3. The movable section 2 is arranged to move perpendicular to the original table 1 and is guided in this movement by the guide rail 4 and driven in this movement by a motor 5 driving a spindle 6. Spindle 6 is in engagement with a nut secured on section 2. This nut is not illustruated in the drawing.
Section 3 may likewise be moved in a direction perpendicular to original table 1 guided by guide rail 4 operated by a motor 7 mounted on section 2. Motor 7 operates a spindle 8 engaging a nut 9 mounted on section 3. Section 3 carries an objective 10 for focussing an image of an original 11, placed on the original table, on a CCD-unit 12 forming part of a CCD-module 13 mounted on section 2. This CCD-module will be described in further detail in the following.
As it will appear from the above, sections 2 and 3 may be moved in a direction perpendicular to original table 1. This movement is controlled by a common guide rail 4 and the movements are propelled by motors 5 and 7. As a focussing on the CCD-unit of original 11 placed on original table 1 is always wanted, irrespective of the reproduction ratio, there must always be a predetermined relation between the distances between section 3 and original table 1 and section 3 and section 2. Advantage is taken of this acording to the invention by mounting on section 2 the means 7, 8, 9 for determining the distance between sections 2 and 3. This allows for designing motor 7 substantially smaller than motor 5 and thus also less expensive, and at the same time spindle 8 also becomes short, thereby complying with given demands for accuracy.
As shown, the CCD-module 13 comprises a CCD- unit 12, a motor 14, a spindle 15 and guiding means 16. Motor 14 serves to displace CCD-unit 12 in the focussing plane of objective 10 by means of spindle 15, thereby allowing for scanning the image of original 11. The printed circuit board 17 on which the CCD-unit is mounted also carries circuits for preprocessing the signals from the CCD-unit.
Motors 5, 7 and 14 are all so-called stepper motors and by the utilization of the generally known properties of such motors it is possible to position the individual sections in mutual relationship by counting the number of drive pulses fed to the motors. By controlling sections 2 and 3 by a common guide rail 4 which as shown may include two vertically positioned parallel H-profiles 18, 19 whose oppositely facing internal rails 20, 21 serve as guide rails for the first section, e.g. unit 3, while the external rails 22, 23 facing away from each other serve as guide rails for the second section, e.g. unit 2, it is achieved that the guiding members, e.g. the wheels 24, 25, for the respective sections 2, 3 can be placed approximately at the same level on guide rails 4, and it is further advantageous that the two sections track with each other if some small curvilinear or linearity irregularities occur in guide rails 4, thereby ensuring that objective 10 and CCD-unit 12 always occupy the same position in relation to each other.

Claims

P A T E N T C L A I M S 1. A scanner for scanning an original and comprising an original table (1), a lens system (10) and a CCD-unit (12), said scanner being of the type in which the scanning is performed by moving the CCD-unit (12) in the focussing plane of the lens system (10), perpendicular to the longitudinal axis of the lens system, characterized in that the lens system (10) and the CCD-unit (12) in dependence on each other are moved along the longitudinal axis of the lens system (10) to obtain different reproduction ratios in such a manner that the light sensistive area of the CCD-unit (12) remains in the focussing plane of the lens system, irrespective of the chosen reproduction ratio.
2. A scanner as claimed in claim 1, characterized in that the displacement of the CCD-unit (12) along the longitudinal axis of the lens system (10) is controlled by a first spindle (6) stationary with respect to the original table, and that the displace- ment of the lens system (10) along the longitudinal axis of the lens system (10) is controlled by a second spindle (8) secured to the CCD-unit.
3. A scanner as claimed in claims 1 or 2, characterized in that the displacement of the CCD-unit (12) and the lens system (10) along the longitudinal axis of the lens system is controlled by a common guide rail (4).
4. A scanner as claimed in claim 2 or 3, characterized in that the first and the second spindles (6, 8) are operated by so-called stepper motors (5, 7).
5. A scanner as claimed in claim 3, characterized in that the common guide rail (4) comprises guide tracks for the CCD-unit (12) and the lens system (10), the guide members (24, 25) associated with the CCD-unit (12) and the lens system (6), respectively, being positioned substantially at the same level in the separate guide tracks (20-23).
EP19890904524 1988-04-06 1989-04-06 Scanner for scanning an original document Ceased EP0410992A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK1850/88 1988-04-06
DK185088A DK159088C (en) 1988-04-06 1988-04-06 SCANNING TO DETECT AN ORIGINAL

Publications (1)

Publication Number Publication Date
EP0410992A1 true EP0410992A1 (en) 1991-02-06

Family

ID=8108532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890904524 Ceased EP0410992A1 (en) 1988-04-06 1989-04-06 Scanner for scanning an original document

Country Status (4)

Country Link
EP (1) EP0410992A1 (en)
JP (1) JPH03503704A (en)
DK (1) DK159088C (en)
WO (1) WO1989010036A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3922512A1 (en) * 1989-07-08 1991-01-17 Kodak Ag DEVICE FOR CONVERTING LIGHT SIGNALS TO VIDEO SIGNALS
AU685728B1 (en) * 1997-05-19 1998-01-22 Umax Data Systems Inc. Auto-focus mechanism
DE10211760A1 (en) * 2002-03-14 2003-10-02 Werth Messtechnik Gmbh Arrangement and method for measuring geometries or structures of essentially two-dimensional objects by means of image processing sensors
EP2681245B1 (en) 2011-03-03 2018-05-09 Zymeworks Inc. Multivalent heteromultimer scaffold design and constructs
AU2013289881B2 (en) 2012-07-13 2018-01-18 Zymeworks Bc Inc. Multivalent heteromultimer scaffold design and constructs
CA2910945A1 (en) 2013-05-08 2014-11-13 Zymeworks Inc. Bispecific her2 and her3 antigen binding constructs
CA2874083C (en) 2014-12-05 2024-01-02 Universite Laval Tdp-43-binding polypeptides useful for the treatment of neurodegenerative diseases

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH658325A5 (en) * 1982-01-21 1986-10-31 Rudolf Boehme Enlarger WITH STEADY FOCUSING ON MODIFICATION OF SCREEN SIZE BY ONE, ON A bridge circuit and an amplifier, CONTROLLED LENS.
DE3276517D1 (en) * 1982-12-24 1987-07-09 Ibm Deutschland Opto-electronic scanning apparatus
SE446922B (en) * 1983-07-04 1986-10-13 Hasselblad Ab Victor PROCEDURE AND DEVICE FOR CONVERTING IMAGE AND FIGURE INFORMATION TO ELECTRICAL
JPS6157176A (en) * 1984-08-29 1986-03-24 Dainippon Screen Mfg Co Ltd Magnification variable control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8910036A1 *

Also Published As

Publication number Publication date
DK159088B (en) 1990-08-27
DK159088C (en) 1991-01-28
WO1989010036A1 (en) 1989-10-19
DK185088D0 (en) 1988-04-06
JPH03503704A (en) 1991-08-15
DK185088A (en) 1989-10-07

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