JPS56144401A - Optical system for original reader - Google Patents

Optical system for original reader

Info

Publication number
JPS56144401A
JPS56144401A JP4891680A JP4891680A JPS56144401A JP S56144401 A JPS56144401 A JP S56144401A JP 4891680 A JP4891680 A JP 4891680A JP 4891680 A JP4891680 A JP 4891680A JP S56144401 A JPS56144401 A JP S56144401A
Authority
JP
Japan
Prior art keywords
lens
effective
parts
block
face
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
JP4891680A
Other languages
Japanese (ja)
Inventor
Jun Tokumitsu
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 JP4891680A priority Critical patent/JPS56144401A/en
Priority to US06/250,263 priority patent/US4432022A/en
Priority to DE19813114890 priority patent/DE3114890A1/en
Publication of JPS56144401A publication Critical patent/JPS56144401A/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
    • H04N1/04—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Exposure Or Original Feeding In Electrophotography (AREA)

Abstract

PURPOSE:To prevent the change in refractive index for the infiltration of moisture from end parts by keeping the distance between the effective lens parts of a lens array consisting of plastics and the end face of a lens array block at more than half the thickness of the effective lens parts. CONSTITUTION:Effective plastic lens parts 91, 92 are formed to a lens array block 8 of a copying machine or the like formed of plastics such as polymethyl methacrylate (PMMA) by leaving a distance (l) from the end face of the block. If the distance (l) from the end face of the block up to the effective lens parts is kept at >=1/2 the thickness of the effective lens parts, it results in that, when the moisture infiltering from the end face of the block has arrived at the effective lens parts, the moisture having already infiltered from both faces of the lens has already spread over the entire part of the lens. Hence, the distribution in the refractive index in the direction perpendicular to the optical axis harmful for imaging performance does not occur.
JP4891680A 1980-04-14 1980-04-14 Optical system for original reader Pending JPS56144401A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP4891680A JPS56144401A (en) 1980-04-14 1980-04-14 Optical system for original reader
US06/250,263 US4432022A (en) 1980-04-14 1981-04-02 Original reading apparatus
DE19813114890 DE3114890A1 (en) 1980-04-14 1981-04-13 TEMPLATE READER

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4891680A JPS56144401A (en) 1980-04-14 1980-04-14 Optical system for original reader

Publications (1)

Publication Number Publication Date
JPS56144401A true JPS56144401A (en) 1981-11-10

Family

ID=12816568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4891680A Pending JPS56144401A (en) 1980-04-14 1980-04-14 Optical system for original reader

Country Status (1)

Country Link
JP (1) JPS56144401A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60149006A (en) * 1983-12-14 1985-08-06 Nec Corp Plane lens

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498893A (en) * 1972-05-23 1974-01-25

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498893A (en) * 1972-05-23 1974-01-25

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60149006A (en) * 1983-12-14 1985-08-06 Nec Corp Plane lens

Similar Documents

Publication Publication Date Title
IT8125613A0 (en) LENS HAVING HIGH REFRACTIVE INDEX AND LOW DISPERSION.
NL187913C (en) Resin for high refractive index lenses and lenses made from these resins.
JPS57181516A (en) Heterogeneous refractive index lens
DE69908325D1 (en) INTEGRATED MICROOPTIC SYSTEMS
DE69103707D1 (en) Optical diffraction lens.
EP0586091A3 (en) High refractive index plastic lens and composition therefor.
NL187873C (en) OPTICAL FIBER WITH SIMPLE POLARIZATION AND SIMPLE MODE.
GB2033607B (en) Zoom lenses having three or four lens groups
FR2658313B1 (en) ZOOM LENS BARREL.
FR2709352B1 (en) Zoom lens barrel.
ES8305939A1 (en) Single lens having one spherical and one aspherical refractive surface
EP0606905A3 (en) Polymerizable compositions and high refractive plastic lens obtained therefrom.
CA2113640A1 (en) Fluorine-containing plastic optical fiber cores
JPS6438711A (en) Zoom lens
JPS5612664A (en) Projector
JPS56144401A (en) Optical system for original reader
AU551366B2 (en) Plastic lens with high refractive index
JPS5784417A (en) Optical system for focal length conversion
EP0112927A4 (en) Resin for lens with high refractive index and lens composed of it.
DE69015430D1 (en) Optical system.
DE69110325D1 (en) Microscope lens.
JPS55166632A (en) Finder for single-lens reflex camera
IT1163911B (en) RESIN FOR HIGH REFRACTIVITY LENSES AND LENSES PRODUCED WITH THE SAME RESIN
DE69318451D1 (en) Zoom lens with an aspherical surface
JPS56133712A (en) Variable focal length objective lens for creating special effect on film and optical system having same lens