CA1041336A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
CA1041336A
CA1041336A CA236,342A CA236342A CA1041336A CA 1041336 A CA1041336 A CA 1041336A CA 236342 A CA236342 A CA 236342A CA 1041336 A CA1041336 A CA 1041336A
Authority
CA
Canada
Prior art keywords
lens
concave
convex
double
spacings
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.)
Expired
Application number
CA236,342A
Other languages
English (en)
French (fr)
Inventor
Wai-Min Liu
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.)
Xerox Corp
Original Assignee
Xerox 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 Xerox Corp filed Critical Xerox Corp
Application granted granted Critical
Publication of CA1041336A publication Critical patent/CA1041336A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/24—Optical objectives specially designed for the purposes specified below for reproducing or copying at short object distances
    • 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
    • G02B15/146—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 more than five groups

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Hydrogenated Pyridines (AREA)
CA236,342A 1974-10-17 1975-09-25 Zoom lens Expired CA1041336A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US515766A US3912374A (en) 1974-10-17 1974-10-17 Six component zoom lens

Publications (1)

Publication Number Publication Date
CA1041336A true CA1041336A (en) 1978-10-31

Family

ID=24052650

Family Applications (1)

Application Number Title Priority Date Filing Date
CA236,342A Expired CA1041336A (en) 1974-10-17 1975-09-25 Zoom lens

Country Status (7)

Country Link
US (1) US3912374A (esLanguage)
JP (1) JPS5944602B2 (esLanguage)
CA (1) CA1041336A (esLanguage)
DE (1) DE2546040C2 (esLanguage)
FR (1) FR2288323A1 (esLanguage)
GB (1) GB1519300A (esLanguage)
NL (1) NL7512031A (esLanguage)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4149774A (en) * 1977-11-14 1979-04-17 Fuji Photo Optical Co., Ltd. Zoom lens system
JPS5768810A (en) * 1980-10-18 1982-04-27 Asahi Optical Co Ltd Variable nagnification lens system for copying
US4812021A (en) * 1987-10-07 1989-03-14 Xerox Corporation Wide angle zoom lens
JP2562636B2 (ja) * 1987-12-25 1996-12-11 富士写真光機株式会社 複写用変倍レンズ系
CN110941086B (zh) * 2019-12-19 2021-12-28 福建福光股份有限公司 一种超短型低畸变微光成像光学系统

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5713849B1 (esLanguage) * 1969-09-08 1982-03-19
US3687522A (en) * 1971-02-01 1972-08-29 Ilex Optical Co Inc Variable magnification lens system for finite conjugate distances
US3865470A (en) * 1973-09-04 1975-02-11 Xerox Corp Variable magnification lens system

Also Published As

Publication number Publication date
US3912374A (en) 1975-10-14
DE2546040C2 (de) 1984-11-22
JPS5165649A (esLanguage) 1976-06-07
FR2288323B1 (esLanguage) 1982-03-26
JPS5944602B2 (ja) 1984-10-31
FR2288323A1 (fr) 1976-05-14
DE2546040A1 (de) 1976-04-22
GB1519300A (en) 1978-07-26
NL7512031A (nl) 1976-04-21

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