JPS5748709A - Wide angle zoom lens system - Google Patents

Wide angle zoom lens system

Info

Publication number
JPS5748709A
JPS5748709A JP55123994A JP12399480A JPS5748709A JP S5748709 A JPS5748709 A JP S5748709A JP 55123994 A JP55123994 A JP 55123994A JP 12399480 A JP12399480 A JP 12399480A JP S5748709 A JPS5748709 A JP S5748709A
Authority
JP
Japan
Prior art keywords
lens
positive
negative
whose
surface faces
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
JP55123994A
Other languages
Japanese (ja)
Other versions
JPS6354162B2 (en
Inventor
Toshiko Shimokura
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta 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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP55123994A priority Critical patent/JPS5748709A/en
Publication of JPS5748709A publication Critical patent/JPS5748709A/en
Publication of JPS6354162B2 publication Critical patent/JPS6354162B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective
    • G02B15/142—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only
    • G02B15/1421—Optical objectives with means for varying the magnification by axial movement of one or more lenses or groups of lenses relative to the image plane for continuously varying the equivalent focal length of the objective having two groups only the first group being positive

Landscapes

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

Abstract

PURPOSE:To reduce the size of a zoom lens having an about 2 variable magnification ratio and an about 76 deg. angle of view and to simplify its constitution by composing a front lens group of a negative, a positive, a negative, and a positive lens and a rear lens group of a positive, a positive, a negative, and a positive single lens, and by making the lens system meet specific requirements. CONSTITUTION:A lens system consists of a front negative lens groups and a rear positive lens group; the front lens group consists of four single lenses which are a negative meniscus lens L1 whose concave surface faces an image side, a positive lens L2, a negative lens L3 whose very concave surface faces the image side, and a positive meniscus lens L4 whose convex surface faces an object side successively from the object side, and the rear lens group consists of four single lenses which are a convexo-convex positive lens L5, a positive meniscus lens L6 whose very convex surface faces the object side, a concavo-concave negative lens L7, and a positive lens L8 successively from the object side. In addition, respective lenses meet requirements shown by conditional equalities (1)-(4).
JP55123994A 1980-09-09 1980-09-09 Wide angle zoom lens system Granted JPS5748709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55123994A JPS5748709A (en) 1980-09-09 1980-09-09 Wide angle zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55123994A JPS5748709A (en) 1980-09-09 1980-09-09 Wide angle zoom lens system

Publications (2)

Publication Number Publication Date
JPS5748709A true JPS5748709A (en) 1982-03-20
JPS6354162B2 JPS6354162B2 (en) 1988-10-27

Family

ID=14874401

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55123994A Granted JPS5748709A (en) 1980-09-09 1980-09-09 Wide angle zoom lens system

Country Status (1)

Country Link
JP (1) JPS5748709A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5313332A (en) * 1990-11-16 1994-05-17 Applied Magnetics Corporation Flexure suspension for two axis actuator
US5381288A (en) * 1992-06-16 1995-01-10 Applied Magnetics Corporation, Inc. Center moment suspension assembly

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51144653A (en) * 1975-06-06 1976-12-11 Canon Inc Zoom lens system
JPS5226236A (en) * 1975-08-22 1977-02-26 Canon Inc Zoom lens system
JPS5232342A (en) * 1975-09-08 1977-03-11 Canon Inc Variable magnification optical unit
JPS5353340A (en) * 1976-10-26 1978-05-15 Nippon Chemical Ind High performance wide angle zoom lens system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51144653A (en) * 1975-06-06 1976-12-11 Canon Inc Zoom lens system
JPS5226236A (en) * 1975-08-22 1977-02-26 Canon Inc Zoom lens system
JPS5232342A (en) * 1975-09-08 1977-03-11 Canon Inc Variable magnification optical unit
JPS5353340A (en) * 1976-10-26 1978-05-15 Nippon Chemical Ind High performance wide angle zoom lens system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5313332A (en) * 1990-11-16 1994-05-17 Applied Magnetics Corporation Flexure suspension for two axis actuator
US5381288A (en) * 1992-06-16 1995-01-10 Applied Magnetics Corporation, Inc. Center moment suspension assembly

Also Published As

Publication number Publication date
JPS6354162B2 (en) 1988-10-27

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