ATA771775A - Optisches system fuer ein objektiv mit veraenderbarer brennweite - Google Patents

Optisches system fuer ein objektiv mit veraenderbarer brennweite

Info

Publication number
ATA771775A
ATA771775A AT771775A AT771775A ATA771775A AT A771775 A ATA771775 A AT A771775A AT 771775 A AT771775 A AT 771775A AT 771775 A AT771775 A AT 771775A AT A771775 A ATA771775 A AT A771775A
Authority
AT
Austria
Prior art keywords
lens
optical system
focal length
changeable focal
changeable
Prior art date
Application number
AT771775A
Other languages
English (en)
Original Assignee
Bell & Howell Co
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 Bell & Howell Co filed Critical Bell & Howell Co
Publication of ATA771775A publication Critical patent/ATA771775A/de

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
    • 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
    • G02B15/144—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 four groups only
    • G02B15/1441—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 four groups only the first group being positive
    • G02B15/144113—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 four groups only the first group being positive arranged +-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
AT771775A 1974-10-15 1975-10-09 Optisches system fuer ein objektiv mit veraenderbarer brennweite ATA771775A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US514340A US3920315A (en) 1974-10-15 1974-10-15 Zoom projection lens

Publications (1)

Publication Number Publication Date
ATA771775A true ATA771775A (de) 1978-05-15

Family

ID=24046756

Family Applications (1)

Application Number Title Priority Date Filing Date
AT771775A ATA771775A (de) 1974-10-15 1975-10-09 Optisches system fuer ein objektiv mit veraenderbarer brennweite

Country Status (5)

Country Link
US (1) US3920315A (de)
JP (1) JPS5162737A (de)
AT (1) ATA771775A (de)
DE (1) DE2543594A1 (de)
GB (1) GB1458345A (de)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4153339A (en) * 1975-06-06 1979-05-08 Canon Kabushiki Kaisha Zoom lens
JPS5832684B2 (ja) * 1977-07-30 1983-07-14 旭光学工業株式会社 高変倍率を有する広角ズ−ムレンズ系
US4297007A (en) * 1979-04-24 1981-10-27 Polaroid Corporation Optical apparatus and method for changing a zoom camera to a fixed focus camera
FR2466785A1 (fr) * 1979-09-28 1981-04-10 Philips Nv Objectif a focale variable suivant de grands rapports comportant des surfaces aspheriques
JPS56147113A (en) * 1980-04-18 1981-11-14 Canon Inc Zoom lens
JPS5727219A (en) * 1980-07-25 1982-02-13 Canon Inc Zoom lens
US4653872A (en) * 1981-04-22 1987-03-31 Nippon Kogaku K. K. Athermalized zoom lens system
JPS5865407A (ja) * 1981-10-15 1983-04-19 Nippon Kogaku Kk <Nikon> ズ−ムレンズ系
JPS58120201A (ja) * 1982-01-11 1983-07-18 Hitachi Ltd プラスチツクレンズを用いたズ−ムレンズ
JPS5979212A (ja) * 1982-10-29 1984-05-08 Canon Inc 合成樹脂材料を用いたズ−ムレンズ
CH658322A5 (fr) * 1983-04-20 1986-10-31 Francois Laurent Systeme optique additif divergent.
US5313330A (en) * 1992-08-31 1994-05-17 U.S. Precision Lens Incorporated Zoom projection lens systems
US5816690A (en) * 1994-11-29 1998-10-06 The Obie Company Compact theatrical light and method
US6650484B2 (en) * 2000-06-21 2003-11-18 Matsushita Electric Industrial Co., Ltd. Zoom lens, and its manufacturing method
JP5919718B2 (ja) * 2011-10-17 2016-05-18 セイコーエプソン株式会社 投射用ズームレンズ
TWI613480B (zh) 2017-02-08 2018-02-01 大立光電股份有限公司 光學取像鏡片系統、取像裝置及電子裝置
CN113311563B (zh) * 2020-02-27 2024-02-06 中强光电股份有限公司 光学镜头

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000260A (en) * 1960-03-28 1961-09-19 Revere Camera Co Zoom projection lens
US3194139A (en) * 1962-03-05 1965-07-13 Eastman Kodak Co Zoom camera system

Also Published As

Publication number Publication date
DE2543594A1 (de) 1976-04-22
GB1458345A (en) 1976-12-15
US3920315A (en) 1975-11-18
JPS5162737A (de) 1976-05-31

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Legal Events

Date Code Title Description
A1Z Withdrawn