JPS6444908A - Focusing system of two-focal length selection type lens system - Google Patents
Focusing system of two-focal length selection type lens systemInfo
- Publication number
- JPS6444908A JPS6444908A JP62201753A JP20175387A JPS6444908A JP S6444908 A JPS6444908 A JP S6444908A JP 62201753 A JP62201753 A JP 62201753A JP 20175387 A JP20175387 A JP 20175387A JP S6444908 A JPS6444908 A JP S6444908A
- Authority
- JP
- Japan
- Prior art keywords
- focusing
- moving
- lens system
- focal length
- selection type
- 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
Links
Landscapes
- Lenses (AREA)
- Structure And Mechanism Of Cameras (AREA)
Abstract
PURPOSE:To enable the focusing to make best use of the advantages inherent to inner focusing or rear focusing by fixing the focus without executing the focusing at a wide range end and moving the entire part or a part of lens groups except the 1st group at a telephoto end. CONSTITUTION:The focus is held fixed without executing the focusing on the wide angle side and the focusing is executed by moving the entire part or a part of the lens groups except the 1st group at a telephoto side. The variable power ratio is adequately about 2-3 times in practicability with the two-focal length selection type lens system, since intermediate focal lengths are not usable with this lens system, unlike a zoom lens. The change of the focusing by the variable power of the moving amt. of the focusing which is the disadvantage of the zoom lens is substantially obviated regardless of inner or rear focusing. The focusing which is small in focusing load and decreases the vignetting rays and the fluctuations in aberrations is thus enables.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62201753A JP2596755B2 (en) | 1987-08-14 | 1987-08-14 | Focusing system with two focal length switching type lens system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62201753A JP2596755B2 (en) | 1987-08-14 | 1987-08-14 | Focusing system with two focal length switching type lens system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6444908A true JPS6444908A (en) | 1989-02-17 |
JP2596755B2 JP2596755B2 (en) | 1997-04-02 |
Family
ID=16446365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62201753A Expired - Fee Related JP2596755B2 (en) | 1987-08-14 | 1987-08-14 | Focusing system with two focal length switching type lens system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2596755B2 (en) |
Cited By (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09269450A (en) * | 1996-03-29 | 1997-10-14 | Olympus Optical Co Ltd | Objective lens for endoscope |
JP2008033208A (en) * | 2006-06-28 | 2008-02-14 | Sony Corp | Zoom lens and imaging device |
CN102681141A (en) * | 2011-03-08 | 2012-09-19 | 株式会社腾龙 | Fixed focus lens |
WO2016171043A1 (en) * | 2015-04-24 | 2016-10-27 | オリンパス株式会社 | Endoscope objective optical system |
CN106461920A (en) * | 2015-02-20 | 2017-02-22 | 奥林巴斯株式会社 | Oblique-view objective optical system and oblique-view endoscope equipped with same |
WO2017145208A1 (en) * | 2016-02-24 | 2017-08-31 | パナソニックIpマネジメント株式会社 | Zoom lens system, image pickup device having zoom lens system, and vehicle having image pickup device |
CN107797254A (en) * | 2017-11-18 | 2018-03-13 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN107861222A (en) * | 2017-11-18 | 2018-03-30 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN107976783A (en) * | 2017-11-18 | 2018-05-01 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108089315A (en) * | 2017-12-29 | 2018-05-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108089314A (en) * | 2017-12-29 | 2018-05-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108089313A (en) * | 2017-12-29 | 2018-05-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108132520A (en) * | 2017-12-18 | 2018-06-08 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227125A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227128A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227131A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227130A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227141A (en) * | 2017-12-29 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227129A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108254871A (en) * | 2017-12-18 | 2018-07-06 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
US11513318B2 (en) | 2015-07-24 | 2022-11-29 | Largan Precision Co., Ltd. | Optical photographing lens assembly, image capturing device and electronic device |
US12105353B2 (en) | 2017-03-31 | 2024-10-01 | Largan Precision Co., Ltd. | Optical imaging lens system, image capturing unit and electronic device |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108363167B (en) * | 2018-01-23 | 2020-03-20 | 瑞声科技(新加坡)有限公司 | Image pickup optical lens |
CN108254897B (en) * | 2018-01-23 | 2020-07-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56150716A (en) * | 1980-04-24 | 1981-11-21 | Minolta Camera Co Ltd | Lens system interchangeable to two kinds of focal length |
JPS62206515A (en) * | 1986-03-06 | 1987-09-11 | Canon Inc | Two-focus objective lens |
JPS6398616A (en) * | 1986-10-15 | 1988-04-30 | Canon Inc | Bifocal objective |
-
1987
- 1987-08-14 JP JP62201753A patent/JP2596755B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56150716A (en) * | 1980-04-24 | 1981-11-21 | Minolta Camera Co Ltd | Lens system interchangeable to two kinds of focal length |
JPS62206515A (en) * | 1986-03-06 | 1987-09-11 | Canon Inc | Two-focus objective lens |
JPS6398616A (en) * | 1986-10-15 | 1988-04-30 | Canon Inc | Bifocal objective |
Cited By (36)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09269450A (en) * | 1996-03-29 | 1997-10-14 | Olympus Optical Co Ltd | Objective lens for endoscope |
JP2008033208A (en) * | 2006-06-28 | 2008-02-14 | Sony Corp | Zoom lens and imaging device |
US7986467B2 (en) | 2006-06-28 | 2011-07-26 | Sony Corporation | Zoom lens and imaging apparatus |
CN102681141A (en) * | 2011-03-08 | 2012-09-19 | 株式会社腾龙 | Fixed focus lens |
US8848291B2 (en) | 2011-03-08 | 2014-09-30 | Tamron Co., Ltd. | Fixed focus lens |
CN106461920A (en) * | 2015-02-20 | 2017-02-22 | 奥林巴斯株式会社 | Oblique-view objective optical system and oblique-view endoscope equipped with same |
WO2016171043A1 (en) * | 2015-04-24 | 2016-10-27 | オリンパス株式会社 | Endoscope objective optical system |
JP6062137B1 (en) * | 2015-04-24 | 2017-01-18 | オリンパス株式会社 | Endoscope objective optical system |
US9804381B2 (en) | 2015-04-24 | 2017-10-31 | Olympus Corporation | Endoscope objective optical system |
US11940667B2 (en) | 2015-07-24 | 2024-03-26 | Largan Precision Co., Ltd. | Optical photographing lens assembly, image capturing device and electronic device |
US11513318B2 (en) | 2015-07-24 | 2022-11-29 | Largan Precision Co., Ltd. | Optical photographing lens assembly, image capturing device and electronic device |
WO2017145208A1 (en) * | 2016-02-24 | 2017-08-31 | パナソニックIpマネジメント株式会社 | Zoom lens system, image pickup device having zoom lens system, and vehicle having image pickup device |
US10967794B2 (en) | 2016-02-24 | 2021-04-06 | Panasonic Intellectual Property Management Co., Ltd. | Zoom lens system, imaging device having zoom lens system, and vehicle having imaging device |
US12105353B2 (en) | 2017-03-31 | 2024-10-01 | Largan Precision Co., Ltd. | Optical imaging lens system, image capturing unit and electronic device |
CN107976783A (en) * | 2017-11-18 | 2018-05-01 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN107861222A (en) * | 2017-11-18 | 2018-03-30 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN107797254A (en) * | 2017-11-18 | 2018-03-13 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN107976783B (en) * | 2017-11-18 | 2020-02-18 | 瑞声科技(新加坡)有限公司 | Image pickup optical lens |
CN107861222B (en) * | 2017-11-18 | 2020-02-04 | 瑞声科技(新加坡)有限公司 | Image pickup optical lens |
CN108227128A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108132520A (en) * | 2017-12-18 | 2018-06-08 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227130A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227129A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108254871A (en) * | 2017-12-18 | 2018-07-06 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227131A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227125A (en) * | 2017-12-18 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108227128B (en) * | 2017-12-18 | 2020-07-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
CN108132520B (en) * | 2017-12-18 | 2020-07-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
CN108227125B (en) * | 2017-12-18 | 2020-07-17 | 瑞声光学解决方案私人有限公司 | Image pickup optical lens |
CN108089315B (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 |
CN108089313B (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 |
CN108089314B (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 |
CN108227141A (en) * | 2017-12-29 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108089313A (en) * | 2017-12-29 | 2018-05-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108089314A (en) * | 2017-12-29 | 2018-05-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
CN108089315A (en) * | 2017-12-29 | 2018-05-29 | 瑞声科技(新加坡)有限公司 | Camera optical camera lens |
Also Published As
Publication number | Publication date |
---|---|
JP2596755B2 (en) | 1997-04-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |