JP4440383B2 - 投射用ズームレンズ - Google Patents

投射用ズームレンズ Download PDF

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Publication number
JP4440383B2
JP4440383B2 JP26611099A JP26611099A JP4440383B2 JP 4440383 B2 JP4440383 B2 JP 4440383B2 JP 26611099 A JP26611099 A JP 26611099A JP 26611099 A JP26611099 A JP 26611099A JP 4440383 B2 JP4440383 B2 JP 4440383B2
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JP
Japan
Prior art keywords
group
zoom lens
projection zoom
lens
wide
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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.)
Expired - Fee Related
Application number
JP26611099A
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English (en)
Japanese (ja)
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JP2001091829A5 (enExample
JP2001091829A (ja
Inventor
義次 河野
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.)
Ricoh Optical Industries Co Ltd
Original Assignee
Ricoh Optical Industries 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 Ricoh Optical Industries Co Ltd filed Critical Ricoh Optical Industries Co Ltd
Priority to JP26611099A priority Critical patent/JP4440383B2/ja
Publication of JP2001091829A publication Critical patent/JP2001091829A/ja
Publication of JP2001091829A5 publication Critical patent/JP2001091829A5/ja
Application granted granted Critical
Publication of JP4440383B2 publication Critical patent/JP4440383B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B15/00—Optical objectives with means for varying the magnification
    • G02B15/14—Optical 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
    • G02B15/145—Optical 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 five groups only
    • G02B15/1455—Optical 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 five groups only the first group being negative
    • G02B15/145531—Optical 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 five groups only the first group being negative arranged -++++

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP26611099A 1999-09-20 1999-09-20 投射用ズームレンズ Expired - Fee Related JP4440383B2 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26611099A JP4440383B2 (ja) 1999-09-20 1999-09-20 投射用ズームレンズ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26611099A JP4440383B2 (ja) 1999-09-20 1999-09-20 投射用ズームレンズ

Publications (3)

Publication Number Publication Date
JP2001091829A JP2001091829A (ja) 2001-04-06
JP2001091829A5 JP2001091829A5 (enExample) 2006-11-02
JP4440383B2 true JP4440383B2 (ja) 2010-03-24

Family

ID=17426468

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26611099A Expired - Fee Related JP4440383B2 (ja) 1999-09-20 1999-09-20 投射用ズームレンズ

Country Status (1)

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JP (1) JP4440383B2 (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4060075B2 (ja) * 2001-12-26 2008-03-12 フジノン株式会社 ズームレンズおよび投写光学装置
JP4217437B2 (ja) 2002-07-22 2009-02-04 キヤノン株式会社 ズームレンズ及びそれを有する画像投射装置
JP2006065249A (ja) 2004-08-30 2006-03-09 Fujinon Corp ズームレンズおよびこれを用いた投写型表示装置
JP4920983B2 (ja) * 2006-02-01 2012-04-18 キヤノン株式会社 ズームレンズ及びそれを有する画像投射装置
JP2009020283A (ja) 2007-07-11 2009-01-29 Fujinon Corp 投影用ズームレンズおよび投写型表示装置
JP5081045B2 (ja) * 2008-04-11 2012-11-21 富士フイルム株式会社 投写用ズームレンズおよび投写型表示装置
JP2010122326A (ja) * 2008-11-17 2010-06-03 Fujinon Corp 投写用ズームレンズおよび投写型表示装置
JP2010160478A (ja) 2008-12-08 2010-07-22 Fujinon Corp 投写用ズームレンズおよび投写型表示装置
JP5287326B2 (ja) 2009-02-16 2013-09-11 セイコーエプソン株式会社 投射用ズームレンズ及び投射型画像表示装置
JP6701246B2 (ja) * 2018-02-27 2020-05-27 キヤノン株式会社 光学系及び撮像装置
CN117642667A (zh) * 2021-07-14 2024-03-01 华为技术有限公司 低屈光率变焦镜头及其光学系统

Also Published As

Publication number Publication date
JP2001091829A (ja) 2001-04-06

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