GB0501425D0 - Stepwise variable zoom lens system - Google Patents

Stepwise variable zoom lens system

Info

Publication number
GB0501425D0
GB0501425D0 GBGB0501425.3A GB0501425A GB0501425D0 GB 0501425 D0 GB0501425 D0 GB 0501425D0 GB 0501425 A GB0501425 A GB 0501425A GB 0501425 D0 GB0501425 D0 GB 0501425D0
Authority
GB
United Kingdom
Prior art keywords
zoom lens
lens system
stepwise variable
variable zoom
stepwise
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
GBGB0501425.3A
Other versions
GB2422440A (en
GB2422440B (en
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.)
Nucam Corp
Original Assignee
Nucam Corp
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 Nucam Corp filed Critical Nucam Corp
Priority to GB0501425A priority Critical patent/GB2422440B/en
Publication of GB0501425D0 publication Critical patent/GB0501425D0/en
Publication of GB2422440A publication Critical patent/GB2422440A/en
Application granted granted Critical
Publication of GB2422440B publication Critical patent/GB2422440B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
    • 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
    • G02B15/143—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 three groups only
    • G02B15/1431—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 three groups only the first group being positive
    • G02B15/143103—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 three groups only the first group being positive arranged ++-
    • 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
    • G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Nonlinear Science (AREA)
  • Lenses (AREA)
GB0501425A 2005-01-24 2005-01-24 Stepwise variable zoom lens system Expired - Fee Related GB2422440B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0501425A GB2422440B (en) 2005-01-24 2005-01-24 Stepwise variable zoom lens system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0501425A GB2422440B (en) 2005-01-24 2005-01-24 Stepwise variable zoom lens system

Publications (3)

Publication Number Publication Date
GB0501425D0 true GB0501425D0 (en) 2005-03-02
GB2422440A GB2422440A (en) 2006-07-26
GB2422440B GB2422440B (en) 2007-06-13

Family

ID=34259565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0501425A Expired - Fee Related GB2422440B (en) 2005-01-24 2005-01-24 Stepwise variable zoom lens system

Country Status (1)

Country Link
GB (1) GB2422440B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111201467A (en) * 2017-10-17 2020-05-26 索尼公司 Variable focal length lens system and imaging apparatus

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1197222A (en) * 1997-04-18 1998-10-28 株式会社尼康 Varifocal lens tube and variable enlarging rate optical system
GB9809738D0 (en) * 1998-05-08 1998-07-08 Pilkington Perkin Elmer Ltd Optical systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111201467A (en) * 2017-10-17 2020-05-26 索尼公司 Variable focal length lens system and imaging apparatus
CN111201467B (en) * 2017-10-17 2022-10-14 索尼公司 Variable focal length lens system and imaging apparatus

Also Published As

Publication number Publication date
GB2422440A (en) 2006-07-26
GB2422440B (en) 2007-06-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20160124