JPS57192917A - Compact zoom lens - Google Patents

Compact zoom lens

Info

Publication number
JPS57192917A
JPS57192917A JP56077933A JP7793381A JPS57192917A JP S57192917 A JPS57192917 A JP S57192917A JP 56077933 A JP56077933 A JP 56077933A JP 7793381 A JP7793381 A JP 7793381A JP S57192917 A JPS57192917 A JP S57192917A
Authority
JP
Japan
Prior art keywords
lens
focal distance
positive
components
negative
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
JP56077933A
Other languages
Japanese (ja)
Other versions
JPS6161654B2 (en
Inventor
Shozo Ishiyama
Hisao Fujita
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 JP56077933A priority Critical patent/JPS57192917A/en
Publication of JPS57192917A publication Critical patent/JPS57192917A/en
Publication of JPS6161654B2 publication Critical patent/JPS6161654B2/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
    • G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • 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
    • G02B15/144—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 four groups only
    • G02B15/1441—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 four groups only the first group being positive
    • G02B15/144113—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 four groups only the first group being positive arranged +-++
    • 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
    • G02B15/145—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 five groups only
    • G02B15/1451—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 five groups only the first group being positive
    • G02B15/145121—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 five groups only the first group being positive arranged +-+-+

Abstract

PURPOSE:To simplify the structure of a mirror frame and improve the zoom ratio of a zoom lens consisting of three positive, negative and positive moving lens components by dividing the 3rd lens component into positive and negative lens components and moving these divided lens components independently of each other. CONSTITUTION:A titled zoom lens consists of the 1st lens component with positive focal distance, the 2nd lens component with negative focal distance, the 3rd lens component with positive focal distance, and the 4th lens component with negative focal distance which are arrayed in order from the object side. The system consisting of the 1st and 2nd lens components in the whole zoom area has positive focal distance and the system consisting of the 3rd and 4th lens components has positive focal distance. When the 1st, 3rd and 4th components are moved to the object side and the 2nd lens component is moved or fixed so that the space between the 1st and 2nd lens components is expanded and the space between the 1st and 3rd lens components are reduced, zooming from wide angle to telephoto positions is made possible. Thus, zooming including wide angle photographing is made possible with 8 numerical limitation formulas.
JP56077933A 1981-05-25 1981-05-25 Compact zoom lens Granted JPS57192917A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56077933A JPS57192917A (en) 1981-05-25 1981-05-25 Compact zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56077933A JPS57192917A (en) 1981-05-25 1981-05-25 Compact zoom lens

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP61117573A Division JPS61258219A (en) 1986-05-23 1986-05-23 Compact zoom lens

Publications (2)

Publication Number Publication Date
JPS57192917A true JPS57192917A (en) 1982-11-27
JPS6161654B2 JPS6161654B2 (en) 1986-12-26

Family

ID=13647878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56077933A Granted JPS57192917A (en) 1981-05-25 1981-05-25 Compact zoom lens

Country Status (1)

Country Link
JP (1) JPS57192917A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6055314A (en) * 1983-09-06 1985-03-30 Minolta Camera Co Ltd Subminiature telephoto zoom lens
JPS6057814A (en) * 1983-09-09 1985-04-03 Minolta Camera Co Ltd Compact zoom lens system with short back focus
JPS60142319A (en) * 1983-12-28 1985-07-27 Minolta Camera Co Ltd Extremely compact zoom lens
JPS61212814A (en) * 1985-03-15 1986-09-20 Canon Inc Zoom lens
JPS61258219A (en) * 1986-05-23 1986-11-15 Konishiroku Photo Ind Co Ltd Compact zoom lens
JPS6343115A (en) * 1986-08-11 1988-02-24 Olympus Optical Co Ltd Compact zoom lens with high variable power ratio
JPS63157120A (en) * 1986-12-22 1988-06-30 Olympus Optical Co Ltd Compact zoom lens with high variable power rate
JPH01178912A (en) * 1987-12-29 1989-07-17 Asahi Optical Co Ltd Compact high variable power rate zoom lens covering wide angle
DE3844239A1 (en) * 1987-12-29 1989-07-27 Asahi Optical Co Ltd COMPACT ZOOM LENS SYSTEM WITH HIGH ZOOM RATIO AND WIDE FIELD OF VIEW

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6423742U (en) * 1987-07-29 1989-02-08

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55156912A (en) * 1979-05-16 1980-12-06 Asahi Optical Co Ltd High variable power zoom lens including wide angle
JPS572014A (en) * 1980-06-05 1982-01-07 Konishiroku Photo Ind Co Ltd Zoom lens having high variable magnification

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55156912A (en) * 1979-05-16 1980-12-06 Asahi Optical Co Ltd High variable power zoom lens including wide angle
JPS572014A (en) * 1980-06-05 1982-01-07 Konishiroku Photo Ind Co Ltd Zoom lens having high variable magnification

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6055314A (en) * 1983-09-06 1985-03-30 Minolta Camera Co Ltd Subminiature telephoto zoom lens
JPH0470609B2 (en) * 1983-09-09 1992-11-11 Minolta Camera Kk
JPS6057814A (en) * 1983-09-09 1985-04-03 Minolta Camera Co Ltd Compact zoom lens system with short back focus
JPS60142319A (en) * 1983-12-28 1985-07-27 Minolta Camera Co Ltd Extremely compact zoom lens
JPS61212814A (en) * 1985-03-15 1986-09-20 Canon Inc Zoom lens
JPS61258219A (en) * 1986-05-23 1986-11-15 Konishiroku Photo Ind Co Ltd Compact zoom lens
JPS6343115A (en) * 1986-08-11 1988-02-24 Olympus Optical Co Ltd Compact zoom lens with high variable power ratio
JPS63157120A (en) * 1986-12-22 1988-06-30 Olympus Optical Co Ltd Compact zoom lens with high variable power rate
DE3844239A1 (en) * 1987-12-29 1989-07-27 Asahi Optical Co Ltd COMPACT ZOOM LENS SYSTEM WITH HIGH ZOOM RATIO AND WIDE FIELD OF VIEW
US4917482A (en) * 1987-12-29 1990-04-17 Asahi Kogaku Kogyo Kabushiki Kaisha Compact zoom lens system capable of high zoom ratio and having coverage of a wide visual field
JPH0432366B2 (en) * 1987-12-29 1992-05-29
JPH01178912A (en) * 1987-12-29 1989-07-17 Asahi Optical Co Ltd Compact high variable power rate zoom lens covering wide angle
DE3844239C2 (en) * 1987-12-29 1996-10-17 Asahi Optical Co Ltd Zoom lens

Also Published As

Publication number Publication date
JPS6161654B2 (en) 1986-12-26

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