WO2009038211A1 - Imaging lens body, imaging unit, and portable information terminal having the imaging unit mounted thereon - Google Patents

Imaging lens body, imaging unit, and portable information terminal having the imaging unit mounted thereon Download PDF

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Publication number
WO2009038211A1
WO2009038211A1 PCT/JP2008/067107 JP2008067107W WO2009038211A1 WO 2009038211 A1 WO2009038211 A1 WO 2009038211A1 JP 2008067107 W JP2008067107 W JP 2008067107W WO 2009038211 A1 WO2009038211 A1 WO 2009038211A1
Authority
WO
WIPO (PCT)
Prior art keywords
imaging
lens
imaging unit
lens body
refractive power
Prior art date
Application number
PCT/JP2008/067107
Other languages
French (fr)
Japanese (ja)
Inventor
Eiji Kurimoto
Original Assignee
Sharp Kabushiki Kaisha
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 Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2009038211A1 publication Critical patent/WO2009038211A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0055—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element
    • G02B13/006—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras employing a special optical element at least one element being a compound optical element, e.g. cemented elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G02B13/0015—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design
    • G02B13/002—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface
    • G02B13/004—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras characterised by the lens design having at least one aspherical surface having four lenses

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

Provided are an imaging lens body, an imaging unit having the imaging lens body, and a portable information terminal having the imaging unit mounted thereon. The imaging lens body has a lens system with a reduced overall length achieved despite its use of a four-lens structure and also has lenses with a small effective diameter. The imaging unit has a meniscus-shaped first lens having positive refractive power and having a convex surface directed to an object, a meniscus-shaped second lens having positive refractive power and having a convex surface directed to an imaging surface, a meniscus-shaped third lens having negative refractive power and having a convex surface directed to the imaging surface, and a fourth lens having negative refractive power, placed near an image forming surface (31a) of a solid imaging device, and having one flat surface and the other surface with a curvature.
PCT/JP2008/067107 2007-09-21 2008-09-22 Imaging lens body, imaging unit, and portable information terminal having the imaging unit mounted thereon WO2009038211A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007246016A JP2009075466A (en) 2007-09-21 2007-09-21 Imaging lens body, imaging unit, and personal digital assistant having the imaging unit mounted thereon
JP2007-246016 2007-09-21

Publications (1)

Publication Number Publication Date
WO2009038211A1 true WO2009038211A1 (en) 2009-03-26

Family

ID=40468020

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/067107 WO2009038211A1 (en) 2007-09-21 2008-09-22 Imaging lens body, imaging unit, and portable information terminal having the imaging unit mounted thereon

Country Status (2)

Country Link
JP (1) JP2009075466A (en)
WO (1) WO2009038211A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI467222B (en) * 2012-09-19 2015-01-01 Largan Precision Co Ltd Image capturing system lens assembly

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002082282A (en) * 2000-09-06 2002-03-22 Ricoh Co Ltd Original reading lens, original reading lens unit, original reading module, original reading method, original reader, and image information processor
JP2005250513A (en) * 2002-07-30 2005-09-15 Konica Minolta Opto Inc Imaging lens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002082282A (en) * 2000-09-06 2002-03-22 Ricoh Co Ltd Original reading lens, original reading lens unit, original reading module, original reading method, original reader, and image information processor
JP2005250513A (en) * 2002-07-30 2005-09-15 Konica Minolta Opto Inc Imaging lens

Also Published As

Publication number Publication date
JP2009075466A (en) 2009-04-09

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