BE819497A - Objectif a grossissement variable - Google Patents

Objectif a grossissement variable

Info

Publication number
BE819497A
BE819497A BE148176A BE148176A BE819497A BE 819497 A BE819497 A BE 819497A BE 148176 A BE148176 A BE 148176A BE 148176 A BE148176 A BE 148176A BE 819497 A BE819497 A BE 819497A
Authority
BE
Belgium
Prior art keywords
variable magnification
magnification lens
lens
variable
magnification
Prior art date
Application number
BE148176A
Other languages
English (en)
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 filed Critical
Publication of BE819497A publication Critical patent/BE819497A/fr

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
    • G02B15/142—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 two groups 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
    • G02B15/146—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
    • G02B15/1461—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 the first group being positive
BE148176A 1973-09-04 1974-09-03 Objectif a grossissement variable BE819497A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US393844A US3865470A (en) 1973-09-04 1973-09-04 Variable magnification lens system

Publications (1)

Publication Number Publication Date
BE819497A true BE819497A (fr) 1974-12-31

Family

ID=23556470

Family Applications (1)

Application Number Title Priority Date Filing Date
BE148176A BE819497A (fr) 1973-09-04 1974-09-03 Objectif a grossissement variable

Country Status (13)

Country Link
US (1) US3865470A (fr)
JP (1) JPS5056242A (fr)
BE (1) BE819497A (fr)
BR (1) BR7405353A (fr)
CA (1) CA1018807A (fr)
DE (1) DE2441294C2 (fr)
ES (1) ES429431A1 (fr)
FR (1) FR2242694B1 (fr)
GB (1) GB1469585A (fr)
IT (1) IT1020382B (fr)
NL (1) NL7410422A (fr)
SE (1) SE392528B (fr)
SU (1) SU592375A3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912374A (en) * 1974-10-17 1975-10-14 Xerox Corp Six component zoom lens
US4149774A (en) * 1977-11-14 1979-04-17 Fuji Photo Optical Co., Ltd. Zoom lens system
JPS5590930A (en) * 1978-12-29 1980-07-10 Nippon Kogaku Kk <Nikon> 4-group constitution lens
JPS5768810A (en) * 1980-10-18 1982-04-27 Asahi Optical Co Ltd Variable nagnification lens system for copying
US4753522A (en) * 1985-06-03 1988-06-28 Ricoh Company, Ltd. Plastic lens assembly for use in copying machines
JPS6291913A (ja) * 1985-10-18 1987-04-27 興和株式会社 レ−ザ−スポツト光学系
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

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5713849B1 (fr) * 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

Also Published As

Publication number Publication date
JPS5056242A (fr) 1975-05-16
CA1018807A (en) 1977-10-11
FR2242694A1 (fr) 1975-03-28
FR2242694B1 (fr) 1976-10-22
DE2441294A1 (de) 1975-03-13
IT1020382B (it) 1977-12-20
SU592375A3 (ru) 1978-02-05
GB1469585A (en) 1977-04-06
AU7280274A (en) 1976-03-04
SE7410077L (fr) 1975-03-05
US3865470A (en) 1975-02-11
SE392528B (sv) 1977-03-28
DE2441294C2 (de) 1982-04-01
BR7405353A (pt) 1976-02-24
ES429431A1 (es) 1977-01-16
NL7410422A (fr) 1974-10-25

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: XEROX CORP.

Effective date: 19850930