JPS6452111A - Compact zoom lens - Google Patents

Compact zoom lens

Info

Publication number
JPS6452111A
JPS6452111A JP6044088A JP6044088A JPS6452111A JP S6452111 A JPS6452111 A JP S6452111A JP 6044088 A JP6044088 A JP 6044088A JP 6044088 A JP6044088 A JP 6044088A JP S6452111 A JPS6452111 A JP S6452111A
Authority
JP
Japan
Prior art keywords
lens
curvature
refractive index
rear group
positive
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
JP6044088A
Other languages
Japanese (ja)
Other versions
JPH0512685B2 (en
Inventor
Yasushi Ogata
Takao Oi
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 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 Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP6044088A priority Critical patent/JPS6452111A/en
Publication of JPS6452111A publication Critical patent/JPS6452111A/en
Publication of JPH0512685B2 publication Critical patent/JPH0512685B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Lenses (AREA)

Abstract

PURPOSE:To compensate aberrations excellently by composing a zoom lens of a front group with a positive refractive index and a rear group with a negative refractive index, including a biconcave lens in the rear group, and specifying the radius of curvature of the biconcave lens. CONSTITUTION:The front group I with the positive refractive index is constituted containing a positive meniscus lens having its convex surface opposite a body, a negative lens, and >=1 positive lens from an object side. Further, the rear group II with the negative refractive index is constituted containing a positive lens, the biconcave lens (a), and a negative meniscus lens having its convex surface on the image side from the object side. Then the radius of curvature of the biconcave lens (a) of the rear group II is set satisfying an inequality. Here, ra and rb indicate the radii of curvature on the body side and image side. Then the gap between the front group I and rear group II of the zoom lens is varied to vary the power. Thus, the radius of curvature of the biconcave lens is specified, so the zoom lens is made compact by shortening the overall length and reducing the movement quantity at the time of the power variation although the power variation ratio is large as 2.
JP6044088A 1987-03-17 1988-03-16 Compact zoom lens Granted JPS6452111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6044088A JPS6452111A (en) 1987-03-17 1988-03-16 Compact zoom lens

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP6001987 1987-03-17
JP6044088A JPS6452111A (en) 1987-03-17 1988-03-16 Compact zoom lens

Publications (2)

Publication Number Publication Date
JPS6452111A true JPS6452111A (en) 1989-02-28
JPH0512685B2 JPH0512685B2 (en) 1993-02-18

Family

ID=26401091

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6044088A Granted JPS6452111A (en) 1987-03-17 1988-03-16 Compact zoom lens

Country Status (1)

Country Link
JP (1) JPS6452111A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02284109A (en) * 1989-04-26 1990-11-21 Konica Corp Small-sized wide angle zoom lens
JPH0317608A (en) * 1989-06-15 1991-01-25 Fuji Photo Optical Co Ltd Switching type tri-focal optical system
JPH03180808A (en) * 1989-12-11 1991-08-06 Konica Corp Small-sized zoom lens
JPH03181908A (en) * 1989-12-12 1991-08-07 Konica Corp Small-sized zoom lens compensated for influence of environmental change
US5109299A (en) * 1990-03-19 1992-04-28 Olympus Optical Co., Ltd. Zoom lens system
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
US5844725A (en) * 1994-09-06 1998-12-01 Canon Kabushiki Kaisha Zoom lens
US6480342B1 (en) 1999-02-22 2002-11-12 Olympus Optical Co., Ltd. Zoom lens system
JP6489515B1 (en) * 2018-03-13 2019-03-27 エーエーシー テクノロジーズ ピーティーイー リミテッド Imaging optical lens
CN110119021A (en) * 2016-12-30 2019-08-13 玉晶光电(厦门)有限公司 Optical mirror slip group

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256915A (en) * 1987-04-14 1988-10-24 Nitto Kogaku Kk Compact zoom lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63256915A (en) * 1987-04-14 1988-10-24 Nitto Kogaku Kk Compact zoom lens

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02284109A (en) * 1989-04-26 1990-11-21 Konica Corp Small-sized wide angle zoom lens
JPH0317608A (en) * 1989-06-15 1991-01-25 Fuji Photo Optical Co Ltd Switching type tri-focal optical system
US5327290A (en) * 1989-10-13 1994-07-05 Minolta Camera Kabushiki Kaisha Compact size zoom lens system
JPH03180808A (en) * 1989-12-11 1991-08-06 Konica Corp Small-sized zoom lens
JPH03181908A (en) * 1989-12-12 1991-08-07 Konica Corp Small-sized zoom lens compensated for influence of environmental change
US5109299A (en) * 1990-03-19 1992-04-28 Olympus Optical Co., Ltd. Zoom lens system
US5283693A (en) * 1990-06-13 1994-02-01 Minolta Camera Kabushiki Kaisha Compact zoom lens system
US5844725A (en) * 1994-09-06 1998-12-01 Canon Kabushiki Kaisha Zoom lens
US6480342B1 (en) 1999-02-22 2002-11-12 Olympus Optical Co., Ltd. Zoom lens system
CN110119021A (en) * 2016-12-30 2019-08-13 玉晶光电(厦门)有限公司 Optical mirror slip group
JP6489515B1 (en) * 2018-03-13 2019-03-27 エーエーシー テクノロジーズ ピーティーイー リミテッド Imaging optical lens
JP2019159298A (en) * 2018-03-13 2019-09-19 エーエーシー テクノロジーズ ピーティーイー リミテッド Image capturing optical lens

Also Published As

Publication number Publication date
JPH0512685B2 (en) 1993-02-18

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