JPS6187119A - Small zoom lens - Google Patents

Small zoom lens

Info

Publication number
JPS6187119A
JPS6187119A JP59209191A JP20919184A JPS6187119A JP S6187119 A JPS6187119 A JP S6187119A JP 59209191 A JP59209191 A JP 59209191A JP 20919184 A JP20919184 A JP 20919184A JP S6187119 A JPS6187119 A JP S6187119A
Authority
JP
Japan
Prior art keywords
lens
negative
image
concave
curve
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
JP59209191A
Other languages
Japanese (ja)
Other versions
JPH0625824B2 (en
Inventor
Hiroki Nakayama
Koji Oizumi
Yasuhisa Sato
Yasuyuki Yamada
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 JP59209191A priority Critical patent/JPH0625824B2/en
Publication of JPS6187119A publication Critical patent/JPS6187119A/en
Publication of JPH0625824B2 publication Critical patent/JPH0625824B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical 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
    • G02B15/142Optical 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
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B15/00Optical objectives with means for varying the magnification
    • G02B15/14Optical 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
    • G02B15/142Optical 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
    • G02B15/1421Optical 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

Abstract

PURPOSE:To compensate aberration efficiently over the whole screen by constituting the 2nd lens group of the 2-1th lens having concave surfaces on both the sides and the 2-2th meniscus-like lens turning its convex surface to the image side and having negative refractive force which are arranged successively from the object side. CONSTITUTION:The 2nd lens group is constituted of two negative lenses, i.e. the negative lens having concave surface on both the sides and the negative meniscus lens turning its concave surface to the object side which are arranged successively from the object side. Since the negative meniscus lens is improved in refractive force without increasing the curve of the image surface and the 1st lens of the 2nd lens group forms concave surfaces on its both sides, two negative lenses of the 2nd lens group take partial charge of negative refractive force each other and both the radiuses of curvature are moderate, so that the generation of a curve on the image surface is reduced at the generation of aberration. Consequently, a small zoom lens reducing the variation of the curve on the image surface due to variable power and efficiently compensating the aberration over the whole screen can be obtained.
JP59209191A 1984-10-05 1984-10-05 Small zoom lens Expired - Lifetime JPH0625824B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59209191A JPH0625824B2 (en) 1984-10-05 1984-10-05 Small zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59209191A JPH0625824B2 (en) 1984-10-05 1984-10-05 Small zoom lens

Publications (2)

Publication Number Publication Date
JPS6187119A true JPS6187119A (en) 1986-05-02
JPH0625824B2 JPH0625824B2 (en) 1994-04-06

Family

ID=16568855

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59209191A Expired - Lifetime JPH0625824B2 (en) 1984-10-05 1984-10-05 Small zoom lens

Country Status (1)

Country Link
JP (1) JPH0625824B2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
USRE35775E (en) * 1987-07-23 1998-04-21 Betensky; Ellis I. Zoom lens with short back focal length
US5786945A (en) * 1995-06-06 1998-07-28 Olympus Optical Co., Ltd. Zoom lens system
CN108132518A (en) * 2017-12-18 2018-06-08 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108132514A (en) * 2017-12-04 2018-06-08 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108152916A (en) * 2017-12-18 2018-06-12 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108227133A (en) * 2017-12-18 2018-06-29 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108254883A (en) * 2017-12-04 2018-07-06 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108363178A (en) * 2018-04-26 2018-08-03 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108387999A (en) * 2018-02-05 2018-08-10 瑞声科技(新加坡)有限公司 Camera optical camera lens

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108089311B (en) * 2017-12-29 2020-07-17 瑞声光学解决方案私人有限公司 Image pickup optical lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57201213A (en) * 1981-06-04 1982-12-09 Canon Inc Microminiature zoom lens
JPS58224322A (en) * 1982-06-23 1983-12-26 Konishiroku Photo Ind Co Ltd Small-sized three-group zoom lens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57201213A (en) * 1981-06-04 1982-12-09 Canon Inc Microminiature zoom lens
JPS58224322A (en) * 1982-06-23 1983-12-26 Konishiroku Photo Ind Co Ltd Small-sized three-group zoom lens

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE35775E (en) * 1987-07-23 1998-04-21 Betensky; Ellis I. Zoom lens with short back focal length
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
US5786945A (en) * 1995-06-06 1998-07-28 Olympus Optical Co., Ltd. Zoom lens system
CN108254883B (en) * 2017-12-04 2020-07-17 瑞声光学解决方案私人有限公司 Image pickup optical lens
CN108132514A (en) * 2017-12-04 2018-06-08 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108254883A (en) * 2017-12-04 2018-07-06 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108227133A (en) * 2017-12-18 2018-06-29 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108152916A (en) * 2017-12-18 2018-06-12 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108132518A (en) * 2017-12-18 2018-06-08 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108132518B (en) * 2017-12-18 2020-06-16 瑞声光学解决方案私人有限公司 Image pickup optical lens
CN108387999A (en) * 2018-02-05 2018-08-10 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108363178A (en) * 2018-04-26 2018-08-03 瑞声科技(新加坡)有限公司 Camera optical camera lens
CN108363178B (en) * 2018-04-26 2020-08-25 瑞声光学解决方案私人有限公司 Image pickup optical lens

Also Published As

Publication number Publication date
JPH0625824B2 (en) 1994-04-06

Similar Documents

Publication Publication Date Title
JPS6224213A (en) Zoom lens
JPS57201213A (en) Microminiature zoom lens
JPS60170816A (en) Zoom lens
JPS63100435A (en) Variable power projection optical system
JPS61156018A (en) Variable power finder
JPS6457222A (en) Zoom lens for compact camera
JPS63123009A (en) Variable power lens system
JPH04267212A (en) Ultra wide angle lens
JPH03288112A (en) Achromatic lens system
JPH0443311A (en) Zoom lens
JPS62153909A (en) Optical system
JPH02234115A (en) Vibration-preventive optical system
JPS59137916A (en) Photographic lens of short overall length
EP1310818A3 (en) Projection optical system
JPH02176611A (en) Objective lens for endoscope
JPS56133711A (en) Photographic lens of short overall length
JPH02109009A (en) Kepler-type zoom finder optical system
JPS62911A (en) Vari-focal lens
JPS63249119A (en) F-theta lens
JPS6049311A (en) Projection lens
JPH01193808A (en) Zoom lens for compact camera
JPS5740220A (en) Zoom lens composed of 3 groups
JPH02257111A (en) Projecting lens for projector
JPS61184513A (en) Image transmitting optical system
JPH02135408A (en) Vibration compensation type telephoto lens