FR2443020A1 - Uniformly illuminating linear light source - has diaphragm or reflector shaped to compensate end effects of fluorescent tube - Google Patents

Uniformly illuminating linear light source - has diaphragm or reflector shaped to compensate end effects of fluorescent tube

Info

Publication number
FR2443020A1
FR2443020A1 FR7833528A FR7833528A FR2443020A1 FR 2443020 A1 FR2443020 A1 FR 2443020A1 FR 7833528 A FR7833528 A FR 7833528A FR 7833528 A FR7833528 A FR 7833528A FR 2443020 A1 FR2443020 A1 FR 2443020A1
Authority
FR
France
Prior art keywords
tube
diaphragm
fluorescent tube
light source
uniformly illuminating
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.)
Granted
Application number
FR7833528A
Other languages
French (fr)
Other versions
FR2443020B1 (en
Inventor
Gerard Biron
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7833528A priority Critical patent/FR2443020A1/en
Publication of FR2443020A1 publication Critical patent/FR2443020A1/en
Application granted granted Critical
Publication of FR2443020B1 publication Critical patent/FR2443020B1/fr
Granted 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
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
    • H04N1/0285—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array in combination with at least one reflector which is in fixed relation to the light source
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/32—Projection printing apparatus, e.g. enlarger, copying camera
    • G03B27/52—Details
    • G03B27/54—Lamp housings; Illuminating means
    • G03B27/542—Lamp housings; Illuminating means for copying cameras, reflex exposure lighting
    • 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
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • 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
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/02845—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array
    • H04N1/0287—Means for illuminating the original, not specific to a particular type of pick-up head using an elongated light source, e.g. tubular lamp, LED array using a tubular lamp or a combination of such lamps
    • 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
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up
    • H04N1/02815—Means for illuminating the original, not specific to a particular type of pick-up head
    • H04N1/02885—Means for compensating spatially uneven illumination, e.g. an aperture arrangement

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

The system for uniformly illuminating a line of a document uses a fluorescent tube of a similar length to that of the line to be illuminated. A diaphragm (2) is placed in front of the tube to define the area which is to be illuminated. For the greater part of its length the diaphragm defines a narrow parallel sided window. Near the ends of the tube the diaphragm window widens out so as to allow more light through, compensating for the end effect of the tube. Alternatively, a reflector is used behind the tube. This is narrow and parallel sided for the greater part of its length, but extends around the tube near the tube ends. This again compensates for the lower amount of light near the ends of the tube.
FR7833528A 1978-11-28 1978-11-28 Uniformly illuminating linear light source - has diaphragm or reflector shaped to compensate end effects of fluorescent tube Granted FR2443020A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7833528A FR2443020A1 (en) 1978-11-28 1978-11-28 Uniformly illuminating linear light source - has diaphragm or reflector shaped to compensate end effects of fluorescent tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7833528A FR2443020A1 (en) 1978-11-28 1978-11-28 Uniformly illuminating linear light source - has diaphragm or reflector shaped to compensate end effects of fluorescent tube

Publications (2)

Publication Number Publication Date
FR2443020A1 true FR2443020A1 (en) 1980-06-27
FR2443020B1 FR2443020B1 (en) 1981-10-30

Family

ID=9215435

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7833528A Granted FR2443020A1 (en) 1978-11-28 1978-11-28 Uniformly illuminating linear light source - has diaphragm or reflector shaped to compensate end effects of fluorescent tube

Country Status (1)

Country Link
FR (1) FR2443020A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523266A1 (en) * 1982-03-15 1983-09-16 Xerox Corp DOCUMENT LIGHTING DEVICE
EP0121928A2 (en) * 1983-04-12 1984-10-17 Computer Gesellschaft Konstanz Mbh Lighting apparatus for an electro-optical scanner
EP0264300A2 (en) * 1986-07-08 1988-04-20 Noritsu Koki Co., Ltd. Light source assembly for use with an electrophotographic copying apparatus
FR2635245A1 (en) * 1988-07-07 1990-02-09 Sony Corp APPARATUS FOR READING A COLOR IMAGE FOR COPIER AND ANALOGUE
FR2640399A1 (en) * 1988-12-09 1990-06-15 Alcatel Business Systems ILLUMINATION CORRECTION DEVICE FOR DOCUMENT ANALYZER
EP0765071A2 (en) * 1995-09-19 1997-03-26 Ncr International Inc. Device for correcting brightness roll-off at an end of a lamp
EP0939543A2 (en) * 1998-02-25 1999-09-01 Hewlett-Packard Company Scanner carriage lamp reflector and method of using same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1097439A (en) * 1954-03-29 1955-07-05 Verrerie Scient Improvements to machines for reproducing plans

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1097439A (en) * 1954-03-29 1955-07-05 Verrerie Scient Improvements to machines for reproducing plans

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/76 *

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2523266A1 (en) * 1982-03-15 1983-09-16 Xerox Corp DOCUMENT LIGHTING DEVICE
EP0121928A2 (en) * 1983-04-12 1984-10-17 Computer Gesellschaft Konstanz Mbh Lighting apparatus for an electro-optical scanner
EP0121928A3 (en) * 1983-04-12 1986-10-29 Computer Gesellschaft Konstanz Mbh Lighting apparatus for an electro-optical scanner
EP0264300A2 (en) * 1986-07-08 1988-04-20 Noritsu Koki Co., Ltd. Light source assembly for use with an electrophotographic copying apparatus
EP0264300A3 (en) * 1986-07-08 1989-02-08 Noritsu Koki Co. Ltd Light source assembly for use with an electrophotographic copying apparatus
FR2635245A1 (en) * 1988-07-07 1990-02-09 Sony Corp APPARATUS FOR READING A COLOR IMAGE FOR COPIER AND ANALOGUE
FR2640399A1 (en) * 1988-12-09 1990-06-15 Alcatel Business Systems ILLUMINATION CORRECTION DEVICE FOR DOCUMENT ANALYZER
EP0765071A2 (en) * 1995-09-19 1997-03-26 Ncr International Inc. Device for correcting brightness roll-off at an end of a lamp
EP0765071A3 (en) * 1995-09-19 1998-09-09 Ncr International Inc. Device for correcting brightness roll-off at an end of a lamp
EP0939543A2 (en) * 1998-02-25 1999-09-01 Hewlett-Packard Company Scanner carriage lamp reflector and method of using same
EP0939543A3 (en) * 1998-02-25 2000-09-27 Hewlett-Packard Company Scanner carriage lamp reflector and method of using same

Also Published As

Publication number Publication date
FR2443020B1 (en) 1981-10-30

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Legal Events

Date Code Title Description
ST Notification of lapse