JPS5662473A - Corrector for exposure - Google Patents

Corrector for exposure

Info

Publication number
JPS5662473A
JPS5662473A JP14004479A JP14004479A JPS5662473A JP S5662473 A JPS5662473 A JP S5662473A JP 14004479 A JP14004479 A JP 14004479A JP 14004479 A JP14004479 A JP 14004479A JP S5662473 A JPS5662473 A JP S5662473A
Authority
JP
Japan
Prior art keywords
light
original
exposure
plate
lens
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
JP14004479A
Other languages
Japanese (ja)
Inventor
Masamichi Tatsuoka
Kazuo Minoura
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP14004479A priority Critical patent/JPS5662473A/en
Priority to US06/199,505 priority patent/US4380390A/en
Priority to DE19803040569 priority patent/DE3040569A1/en
Priority to GB8034637A priority patent/GB2064809B/en
Publication of JPS5662473A publication Critical patent/JPS5662473A/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optical Systems Of Projection Type Copiers (AREA)
  • Facsimile Scanning Arrangements (AREA)

Abstract

PURPOSE:To enable to obtain almost uniform exposure on the image forming plane without using complicated shape of light interrupting plate, by using the light interference plate consisting of a part of a disc, in parallel with lengthwise the original illumination area between the optical path projective lens and the original surface through the use of a fluorescent lamp as a light source. CONSTITUTION:An original surface 1 is radiated with a light source 6, and the light flux from the original surface 1 is reflected on a mirror 2, and the image is formed on a solidstate pickup element 5 with a lens 4. In this case, without an interruption plate 3, uneven exposure can be caused from the 4th power of cosine of the lens 4 as to the exposure of the solidstate pickup element 5. To compensate this, the light shield plate 3 is made as a part of a disc, and the light shield plate 3 is made apart from the plane including the radiation area lengthwise on the original plane and the light axis by H horizontally and from the front surface of the image forming element by L, and further, equation 1 is satisfied.
JP14004479A 1979-10-29 1979-10-29 Corrector for exposure Pending JPS5662473A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP14004479A JPS5662473A (en) 1979-10-29 1979-10-29 Corrector for exposure
US06/199,505 US4380390A (en) 1979-10-29 1980-10-22 Exposure correcting device
DE19803040569 DE3040569A1 (en) 1979-10-29 1980-10-28 EXPOSURE CORRECTION DEVICE
GB8034637A GB2064809B (en) 1979-10-29 1980-10-28 Light-shield plate exposure correcting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14004479A JPS5662473A (en) 1979-10-29 1979-10-29 Corrector for exposure

Publications (1)

Publication Number Publication Date
JPS5662473A true JPS5662473A (en) 1981-05-28

Family

ID=15259665

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14004479A Pending JPS5662473A (en) 1979-10-29 1979-10-29 Corrector for exposure

Country Status (1)

Country Link
JP (1) JPS5662473A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997132A (en) * 1982-11-26 1984-06-04 Fujitsu Ltd Electrophotographic device
JPS59154873A (en) * 1983-02-24 1984-09-03 Asahi Optical Co Ltd Picture reader
JPS6046522A (en) * 1983-08-25 1985-03-13 Masayasu Negishi Light controller

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53106118A (en) * 1977-02-28 1978-09-14 Fujitsu Ltd Lens iris for optical system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53106118A (en) * 1977-02-28 1978-09-14 Fujitsu Ltd Lens iris for optical system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5997132A (en) * 1982-11-26 1984-06-04 Fujitsu Ltd Electrophotographic device
JPS59154873A (en) * 1983-02-24 1984-09-03 Asahi Optical Co Ltd Picture reader
JPS6046522A (en) * 1983-08-25 1985-03-13 Masayasu Negishi Light controller

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