JPS57197508A - Small-sized retrofocus type wide-angle lens - Google Patents

Small-sized retrofocus type wide-angle lens

Info

Publication number
JPS57197508A
JPS57197508A JP6643982A JP6643982A JPS57197508A JP S57197508 A JPS57197508 A JP S57197508A JP 6643982 A JP6643982 A JP 6643982A JP 6643982 A JP6643982 A JP 6643982A JP S57197508 A JPS57197508 A JP S57197508A
Authority
JP
Japan
Prior art keywords
lens
group
groups
combined
meniscus
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.)
Granted
Application number
JP6643982A
Other languages
Japanese (ja)
Other versions
JPS616364B2 (en
Inventor
Jihei Nakagawa
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical 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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP6643982A priority Critical patent/JPS57197508A/en
Publication of JPS57197508A publication Critical patent/JPS57197508A/en
Publication of JPS616364B2 publication Critical patent/JPS616364B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/04—Reversed telephoto objectives

Landscapes

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

Abstract

PURPOSE:To obtain a lens system which can compensate aberration in excellent manner even with small size having performance of F3.5-2.8, angle of view 84 deg.-92 deg. and fB 1.4-1.7, by constituting the lens system with 7 groups and satisfying a prescribed condition. CONSTITUTION:A lens system consists of the 1st group of positive meniscus lens, the 2nd and 3rd groups of negative meniscus, the 4th group comprising positive single, combined or split lens, the 5th group comprising negative combined or split lens, the 6 group of psitive meniscus, and the 7 group of positive lens. The relation of 0.5f<¦f123¦<0.75f and f123<0, 0.5f<D4+D5<0.9f is satisfied, where f123 and (f) are resultant focus of the 1st-3rd groups and the overall system and D4 and D5 are the thickness of the 4th and 5th lenses respectively. The relation for the 5th group with combined lens is nb'-nb<0.1 and rb<0, where (rb) is bonded plane taken concave for aperture, and (nb) and (nb') are refractive index before and after the bonded plane.
JP6643982A 1982-04-19 1982-04-19 Small-sized retrofocus type wide-angle lens Granted JPS57197508A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6643982A JPS57197508A (en) 1982-04-19 1982-04-19 Small-sized retrofocus type wide-angle lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6643982A JPS57197508A (en) 1982-04-19 1982-04-19 Small-sized retrofocus type wide-angle lens

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP47046084A Division JPS5754767B2 (en) 1972-05-10 1972-05-10

Publications (2)

Publication Number Publication Date
JPS57197508A true JPS57197508A (en) 1982-12-03
JPS616364B2 JPS616364B2 (en) 1986-02-26

Family

ID=13315798

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6643982A Granted JPS57197508A (en) 1982-04-19 1982-04-19 Small-sized retrofocus type wide-angle lens

Country Status (1)

Country Link
JP (1) JPS57197508A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226315A (en) * 1983-06-08 1984-12-19 Olympus Optical Co Ltd Endoscope objective lens
JPH01156711A (en) * 1987-12-15 1989-06-20 Matsushita Electric Ind Co Ltd Superwide-angle lens
JP2007225959A (en) * 2006-02-24 2007-09-06 Pentax Corp Wide angle lens system
JP2010176016A (en) * 2009-01-30 2010-08-12 Nikon Corp Wide-angle lens, imaging apparatus, and method for manufacturing the wide-angle lens
JP2010176015A (en) * 2009-01-30 2010-08-12 Nikon Corp Wide-angle lens, imaging apparatus, and method for manufacturing the wide angle-lens
JP2021096440A (en) * 2019-12-13 2021-06-24 エーエーシー オプティックス ソリューションズ ピーティーイー リミテッド Image capturing optical lens

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59226315A (en) * 1983-06-08 1984-12-19 Olympus Optical Co Ltd Endoscope objective lens
JPH0414324B2 (en) * 1983-06-08 1992-03-12 Olympus Optical Co
JPH01156711A (en) * 1987-12-15 1989-06-20 Matsushita Electric Ind Co Ltd Superwide-angle lens
JP2007225959A (en) * 2006-02-24 2007-09-06 Pentax Corp Wide angle lens system
JP4667269B2 (en) * 2006-02-24 2011-04-06 Ｈｏｙａ株式会社 Wide-angle lens system
JP2010176016A (en) * 2009-01-30 2010-08-12 Nikon Corp Wide-angle lens, imaging apparatus, and method for manufacturing the wide-angle lens
JP2010176015A (en) * 2009-01-30 2010-08-12 Nikon Corp Wide-angle lens, imaging apparatus, and method for manufacturing the wide angle-lens
JP2021096440A (en) * 2019-12-13 2021-06-24 エーエーシー オプティックス ソリューションズ ピーティーイー リミテッド Image capturing optical lens

Also Published As

Publication number Publication date
JPS616364B2 (en) 1986-02-26

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