JPS6442618A - Miniature zoom lens - Google Patents

Miniature zoom lens

Info

Publication number
JPS6442618A
JPS6442618A JP19870587A JP19870587A JPS6442618A JP S6442618 A JPS6442618 A JP S6442618A JP 19870587 A JP19870587 A JP 19870587A JP 19870587 A JP19870587 A JP 19870587A JP S6442618 A JPS6442618 A JP S6442618A
Authority
JP
Japan
Prior art keywords
lens
refracting power
lens group
power
phi2
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.)
Pending
Application number
JP19870587A
Other languages
Japanese (ja)
Inventor
Yoshiaki Ito
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.)
Canon Inc
Original Assignee
Canon 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 Canon Inc filed Critical Canon Inc
Priority to JP19870587A priority Critical patent/JPS6442618A/en
Publication of JPS6442618A publication Critical patent/JPS6442618A/en
Pending legal-status Critical Current

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  • Lenses (AREA)

Abstract

PURPOSE:To shorten the overall length of the lens so that a prescribed variable power ratio and a photographing view angle, by specifying the lens constitution of two lens groups having prescribed refracting power and executing the variable power. CONSTITUTION:A first lens group consists of the 1-1 lens having positive refracting power, whose convex surface has turned to an object side, the 1-2 lens whose both lens surfaces are concave surfaces, and the 1-3 lens group having at least two positive refractive power, and a second lens group has two lenses of the 2-1 lens being like a meniscus and having positive refracting power, whose convex surface has turned to an image side, and the 2-2 lens having negative refracting power. Also, when each refracting power of the first lens group and the second lens group, each refracting power of the 2-1 lens and the 2-2 lens, the refracting power of the whole system at the wide angle end, a principal point interval of the first lens group and the second lens group at the wide angle end, and par-axial radiuses of curvature of the lens surfaces of the object side and the image side of the 2-2 lens are denoted as phi1, phi2, and phi2-1, phi2-2, and phiw, and 1w, and R12, R13, respectively, conditions of expressions I-VI are satisfied.
JP19870587A 1987-08-08 1987-08-08 Miniature zoom lens Pending JPS6442618A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19870587A JPS6442618A (en) 1987-08-08 1987-08-08 Miniature zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19870587A JPS6442618A (en) 1987-08-08 1987-08-08 Miniature zoom lens

Publications (1)

Publication Number Publication Date
JPS6442618A true JPS6442618A (en) 1989-02-14

Family

ID=16395648

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19870587A Pending JPS6442618A (en) 1987-08-08 1987-08-08 Miniature zoom lens

Country Status (1)

Country Link
JP (1) JPS6442618A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0273322A (en) * 1988-09-09 1990-03-13 Nikon Corp Miniature zoom lens
US5283693A (en) * 1990-06-13 1994-02-01 Minolta Camera Kabushiki Kaisha Compact zoom lens system
US5327290A (en) * 1989-10-13 1994-07-05 Minolta Camera Kabushiki Kaisha Compact size zoom lens system
JPH07306361A (en) * 1994-05-11 1995-11-21 Canon Inc Compact zoom lens
JPH09152550A (en) * 1995-11-29 1997-06-10 Asahi Optical Co Ltd Zoom lens
CN106324800A (en) * 2015-07-07 2017-01-11 今国光学工业股份有限公司 Optical pickup lens

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0273322A (en) * 1988-09-09 1990-03-13 Nikon Corp Miniature zoom lens
US5327290A (en) * 1989-10-13 1994-07-05 Minolta Camera Kabushiki Kaisha Compact size zoom lens system
US5283693A (en) * 1990-06-13 1994-02-01 Minolta Camera Kabushiki Kaisha Compact zoom lens system
JPH07306361A (en) * 1994-05-11 1995-11-21 Canon Inc Compact zoom lens
JPH09152550A (en) * 1995-11-29 1997-06-10 Asahi Optical Co Ltd Zoom lens
CN106324800A (en) * 2015-07-07 2017-01-11 今国光学工业股份有限公司 Optical pickup lens

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