JP2000275522A5 - - Google Patents
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- JP2000275522A5 JP2000275522A5 JP1999077548A JP7754899A JP2000275522A5 JP 2000275522 A5 JP2000275522 A5 JP 2000275522A5 JP 1999077548 A JP1999077548 A JP 1999077548A JP 7754899 A JP7754899 A JP 7754899A JP 2000275522 A5 JP2000275522 A5 JP 2000275522A5
- Authority
- JP
- Japan
- Prior art keywords
- lens
- object side
- refractive power
- lens group
- 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.)
- Pending
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- 230000005499 meniscus Effects 0.000 claims 9
- 230000003287 optical Effects 0.000 claims 8
Claims (20)
0.02<|fL |/fT <0.3 ・・・(1)
0.1<ΔXLT/fT <0.7 ・・・(2)
1.5<βLT/βLW<6.0 (3)
ただし、fL は最終レンズ群の焦点距離、fT は全系の望遠端の焦点距離、ΔXLTは広角端を基準とした時の最終レンズ群の望遠端までのズーミング移動量、βLTは最終レンズ群の望遠端の横倍率、βLWは最終レンズ群の広角端の横倍率である。The first lens group having positive refractive power or negative refractive power on the most object side, and the final lens group having negative refractive power on the most image surface side, are composed of at least five groups as a whole, from the wide angle side. A zoom lens characterized in that each lens unit moves to the object side when zooming to the telephoto side, and satisfies the following conditional expression:
0.02 <| f L | / f T <0.3 (1)
0.1 <ΔX LT / f T <0.7 (2)
1.5 <β LT / β LW <6.0 (3)
Where f L is the focal length of the final lens group, f T is the focal length of the telephoto end of the entire system, ΔX LT is the amount of zooming movement to the telephoto end of the final lens group with respect to the wide angle end, and β LT is The lateral magnification at the telephoto end of the final lens group, β LW is the lateral magnification at the wide-angle end of the final lens group.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11077548A JP2000275522A (en) | 1999-03-23 | 1999-03-23 | Zoom lens |
US09/499,608 US6327100B1 (en) | 1999-02-08 | 2000-02-07 | Zoom lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11077548A JP2000275522A (en) | 1999-03-23 | 1999-03-23 | Zoom lens |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2000275522A JP2000275522A (en) | 2000-10-06 |
JP2000275522A5 true JP2000275522A5 (en) | 2005-05-26 |
Family
ID=13637078
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11077548A Pending JP2000275522A (en) | 1999-02-08 | 1999-03-23 | Zoom lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2000275522A (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1857851A4 (en) * | 2005-03-11 | 2008-07-16 | Sony Corp | Zoom lens and imaging device |
US9703081B2 (en) | 2012-05-15 | 2017-07-11 | Ricoh Company, Ltd. | Projection zoom lens and projector |
KR102378519B1 (en) * | 2015-03-23 | 2022-03-25 | 삼성전자주식회사 | Single focus lens and photographing lens having the same |
US10353184B2 (en) * | 2016-09-14 | 2019-07-16 | Panasonic Intellectual Property Management Co., Ltd. | Zoom lens system, imaging apparatus and camera |
JP6463591B1 (en) * | 2018-07-20 | 2019-02-06 | エーエーシーアコースティックテクノロジーズ(シンセン)カンパニーリミテッドAAC Acoustic Technologies(Shenzhen)Co.,Ltd | Imaging lens |
JP7210303B2 (en) * | 2019-01-29 | 2023-01-23 | 株式会社タムロン | Zoom lens and imaging device |
JP7216557B2 (en) * | 2019-01-29 | 2023-02-01 | 株式会社タムロン | Zoom lens and imaging device |
JP7289711B2 (en) * | 2019-04-25 | 2023-06-12 | キヤノン株式会社 | Optical system and imaging device having the same |
JP6902174B1 (en) * | 2021-03-05 | 2021-07-14 | ジョウシュウシ レイテック オプトロニクス カンパニーリミテッド | Zoom lens |
JP6903244B1 (en) * | 2021-03-05 | 2021-07-14 | ジョウシュウシ レイテック オプトロニクス カンパニーリミテッド | Zoom lens |
JP6900586B1 (en) * | 2021-03-05 | 2021-07-07 | ジョウシュウシ レイテック オプトロニクス カンパニーリミテッド | Zoom lens |
CN114460728B (en) * | 2022-01-25 | 2023-06-23 | 凯迈(洛阳)测控有限公司 | Microminiature medium wave refrigerating infrared continuous zooming optical system |
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1999
- 1999-03-23 JP JP11077548A patent/JP2000275522A/en active Pending