JPS5624872A - Illumination unit for optical information reader - Google Patents

Illumination unit for optical information reader

Info

Publication number
JPS5624872A
JPS5624872A JP10096979A JP10096979A JPS5624872A JP S5624872 A JPS5624872 A JP S5624872A JP 10096979 A JP10096979 A JP 10096979A JP 10096979 A JP10096979 A JP 10096979A JP S5624872 A JPS5624872 A JP S5624872A
Authority
JP
Japan
Prior art keywords
infrared ray
optical information
illumination unit
component
information reader
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.)
Pending
Application number
JP10096979A
Other languages
Japanese (ja)
Inventor
Tadatami Mori
Masaaki Nakamura
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP10096979A priority Critical patent/JPS5624872A/en
Publication of JPS5624872A publication Critical patent/JPS5624872A/en
Pending 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To prevent the original surface from being burnt, by rejecting infrared ray component in the illumination light to the objective to be read in with diffraction grating. CONSTITUTION:The light from the lamp 8 is reflected on the cold mirror 9 and it is incident to the reflecrion type diffraction grating 2. The grating 2 radiates the infrared ray component 3'' and visual light component 3' with separation. The visual light 3' is collected with the lens 5 and illuminates the original plane 7. Since unnecessary infrared ray component 3'' is absorbed in the infrared ray absorbing plate 4, the original plane 7 is not burnt.
JP10096979A 1979-08-07 1979-08-07 Illumination unit for optical information reader Pending JPS5624872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10096979A JPS5624872A (en) 1979-08-07 1979-08-07 Illumination unit for optical information reader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10096979A JPS5624872A (en) 1979-08-07 1979-08-07 Illumination unit for optical information reader

Publications (1)

Publication Number Publication Date
JPS5624872A true JPS5624872A (en) 1981-03-10

Family

ID=14288170

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10096979A Pending JPS5624872A (en) 1979-08-07 1979-08-07 Illumination unit for optical information reader

Country Status (1)

Country Link
JP (1) JPS5624872A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6159440A (en) * 1984-08-31 1986-03-26 Fuji Xerox Co Ltd Lighting device of copying machine or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6159440A (en) * 1984-08-31 1986-03-26 Fuji Xerox Co Ltd Lighting device of copying machine or the like

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