WO2011078048A1 - ２枚構成から成るｆ値が３以下の高性能大口径比撮像レンズ - Google Patents

２枚構成から成るｆ値が３以下の高性能大口径比撮像レンズ Download PDF

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Publication number
WO2011078048A1
WO2011078048A1 PCT/JP2010/072630 JP2010072630W WO2011078048A1 WO 2011078048 A1 WO2011078048 A1 WO 2011078048A1 JP 2010072630 W JP2010072630 W JP 2010072630W WO 2011078048 A1 WO2011078048 A1 WO 2011078048A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens
curvature
diffractive optical
imaging lens
radius
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.)
Ceased
Application number
PCT/JP2010/072630
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
久則 鈴木
慎吾 渡邊
健一 鎌田
和雄 松岡
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.)
Kantatsu Co Ltd
Original Assignee
Kantatsu Co 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 Kantatsu Co Ltd filed Critical Kantatsu Co Ltd
Publication of WO2011078048A1 publication Critical patent/WO2011078048A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G02B13/0015—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
    • G02B13/003—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 two lenses

Definitions

  • the present invention solves this problem by arranging a diffractive optical surface on a concave surface appropriately separated from the stop in order to cope with a large angle of view.
  • a diffractive optical surface is disposed on the first surface of the second lens.
  • Conditional expression (2) is a condition related to the first lens edge thickness, and is a restriction peculiar to a particularly small image pickup lens such as an image pickup lens for a mobile phone, and represents a relationship between the restriction on the mechanism and the performance.
  • the lens configuration as in the present invention is generally advantageous for correcting astigmatism, coma aberration, distortion, and the like because the refractive surface is arranged in a shape close to concentric across the diaphragm, but is required by the image sensor.
  • a two-element lens having a diffractive optical surface is already known from Japanese Patent Application Laid-Open No. 2004-191844 and Japanese Patent Application Laid-Open No. 2008-89949.
  • the arrangement position and shape of the diffractive optical surface are not clearly defined. Due to the nature of diffractive optical surfaces having large dispersion, it is difficult to achieve effective effects unless the lens configuration, arrangement position, and shape thereof are optimized.
  • the degree of freedom regarding the arrangement of the diffractive optical surface is large under specific conditions such as monochromatic light and a small angle of view, in order to make the diffractive optical surface act effectively in an imaging lens with white light and a wide angle of view as in this embodiment For this, the form of the present invention is optimal.
  • the imaging lens according to the third embodiment has substantially the same lens configuration as that of the first embodiment, but the distance L from the stop to the optical diffraction surface is larger than that of the first embodiment, and the edge thickness De of the first lens is larger.
  • R1 Aspherical surface R1 of the first surface of the first lens R2 Aspherical surfaces R3 and R5 of the first surface of the second lens R5 A virtual surface corresponding to a lens frame for controlling the light beam R4 Aperture R6
  • the diffractive optical surface of the first surface of the second lens is Formed aspheric surface R7 Aspheric surfaces R8 and R9 of the second surface of the second lens Curvature radius d1 to d8 of the cover glass

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
PCT/JP2010/072630 2009-12-24 2010-12-16 ２枚構成から成るｆ値が３以下の高性能大口径比撮像レンズ Ceased WO2011078048A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2009-292279 2009-12-24
JP2009292279A JP5358425B2 (ja) 2009-12-24 2009-12-24 ２枚構成から成るｆ値が３以下の高性能大口径比撮像レンズ

Publications (1)

Publication Number Publication Date
WO2011078048A1 true WO2011078048A1 (ja) 2011-06-30

Family

ID=44195578

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/072630 Ceased WO2011078048A1 (ja) 2009-12-24 2010-12-16 ２枚構成から成るｆ値が３以下の高性能大口径比撮像レンズ

Country Status (2)

Country Link
JP (1) JP5358425B2 (https=)
WO (1) WO2011078048A1 (https=)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10161020A (ja) * 1996-12-02 1998-06-19 Olympus Optical Co Ltd 回折光学素子を用いた撮影光学系
JP2000089107A (ja) * 1998-09-17 2000-03-31 Fuji Photo Optical Co Ltd 画像読取用レンズ
JP2001083414A (ja) * 1999-09-09 2001-03-30 Canon Inc 画像読取用レンズ
JP2007333883A (ja) * 2006-06-13 2007-12-27 Matsushita Electric Ind Co Ltd 単焦点撮像レンズ及びそれを備えた撮像装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009292279A (ja) * 2008-06-04 2009-12-17 Mazda Motor Corp 車両空調ユニットの配設構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10161020A (ja) * 1996-12-02 1998-06-19 Olympus Optical Co Ltd 回折光学素子を用いた撮影光学系
JP2000089107A (ja) * 1998-09-17 2000-03-31 Fuji Photo Optical Co Ltd 画像読取用レンズ
JP2001083414A (ja) * 1999-09-09 2001-03-30 Canon Inc 画像読取用レンズ
JP2007333883A (ja) * 2006-06-13 2007-12-27 Matsushita Electric Ind Co Ltd 単焦点撮像レンズ及びそれを備えた撮像装置

Also Published As

Publication number Publication date
JP5358425B2 (ja) 2013-12-04
JP2011133631A (ja) 2011-07-07

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