CH621414A5 - - Google Patents

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Publication number
CH621414A5
CH621414A5 CH1392277A CH1392277A CH621414A5 CH 621414 A5 CH621414 A5 CH 621414A5 CH 1392277 A CH1392277 A CH 1392277A CH 1392277 A CH1392277 A CH 1392277A CH 621414 A5 CH621414 A5 CH 621414A5
Authority
CH
Switzerland
Prior art keywords
lens
sleeve
central
diaphragm
lenses
Prior art date
Application number
CH1392277A
Other languages
German (de)
English (en)
Inventor
Fred Dr Mast
Original Assignee
Gretag Ag
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 Gretag Ag filed Critical Gretag Ag
Priority to CH1392277A priority Critical patent/CH621414A5/de
Priority to JP12371978A priority patent/JPS5491223A/ja
Priority to IT51471/78A priority patent/IT1106040B/it
Priority to US05/955,250 priority patent/US4247168A/en
Priority to GB7842659A priority patent/GB2008789B/en
Priority to DE19782849128 priority patent/DE2849128A1/de
Priority to FR7832135A priority patent/FR2408846A1/fr
Publication of CH621414A5 publication Critical patent/CH621414A5/de

Links

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
    • G02B15/142—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
    • G02B15/143—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
    • G02B15/143105—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 +-+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Automatic Focus Adjustment (AREA)
  • Lens Barrels (AREA)
CH1392277A 1977-11-15 1977-11-15 CH621414A5 (ru)

Priority Applications (7)

Application Number Priority Date Filing Date Title
CH1392277A CH621414A5 (ru) 1977-11-15 1977-11-15
JP12371978A JPS5491223A (en) 1977-11-15 1978-10-09 Zoom objective lens
IT51471/78A IT1106040B (it) 1977-11-15 1978-10-11 Obiettivo a focale variabile ovvero cosidetto obiettivo zoom
US05/955,250 US4247168A (en) 1977-11-15 1978-10-27 Zoom lens for photographic printers
GB7842659A GB2008789B (en) 1977-11-15 1978-10-31 Zoom lens
DE19782849128 DE2849128A1 (de) 1977-11-15 1978-11-13 Zoom-objektiv
FR7832135A FR2408846A1 (fr) 1977-11-15 1978-11-14 Objectif a focale variable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1392277A CH621414A5 (ru) 1977-11-15 1977-11-15

Publications (1)

Publication Number Publication Date
CH621414A5 true CH621414A5 (ru) 1981-01-30

Family

ID=4396495

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1392277A CH621414A5 (ru) 1977-11-15 1977-11-15

Country Status (7)

Country Link
US (1) US4247168A (ru)
JP (1) JPS5491223A (ru)
CH (1) CH621414A5 (ru)
DE (1) DE2849128A1 (ru)
FR (1) FR2408846A1 (ru)
GB (1) GB2008789B (ru)
IT (1) IT1106040B (ru)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56159614A (en) * 1980-05-13 1981-12-09 Asahi Optical Co Ltd Copying variable magnification lens system
US4894682A (en) * 1986-09-30 1990-01-16 Canon Kabushiki Kaisha Variable magnification copying apparatus
US6657670B1 (en) * 1999-03-16 2003-12-02 Teco Image Systems Co., Ltd. Diaphragm structure of digital still camera
JP5275476B2 (ja) 2009-12-25 2013-08-28 Ｙｋｋ株式会社 ボタン取付用上金型
KR102417784B1 (ko) 2016-04-04 2022-07-06 에이알큐 아이피 리미티드 고체-액체 원유 조성물 및 그 분별 방법
US9777235B2 (en) 2016-04-04 2017-10-03 Allard Services Limited Fuel oil compositions and processes

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1947669A (en) * 1931-09-28 1934-02-20 Bell & Howell Co Lens of variable equivalent focal length
GB398307A (en) 1932-06-16 1933-09-14 Arthur Warmisham Improvements in variable focus lenses
DE650907C (de) * 1934-08-28 1937-10-05 Hugh Iwan Gramatzki Optisches System
US2159394A (en) * 1936-06-09 1939-05-23 Paramount Productions Inc Variable equivalent focal length lens
NL90813C (ru) * 1950-07-18
US3436145A (en) * 1964-09-17 1969-04-01 Ednalite Corp Focusing lens pair combined with photocopying objective
US3495895A (en) * 1966-09-01 1970-02-17 Rodenstock Optik G Apochromatic,symmetrical,wide-angle objective lens system
AT287341B (de) * 1969-08-14 1971-01-25 Eumig Pankratisches Projektionsobjektiv
US3625595A (en) * 1970-01-26 1971-12-07 Bell & Howell Co Self-compensating symmetrical lens system
JPS491242A (ru) * 1972-04-17 1974-01-08
US3752565A (en) * 1972-02-18 1973-08-14 Shima Kogaku Kk Zoom lens apparatus
GB1386175A (en) * 1972-06-02 1975-03-05 Rank Organisation Ltd Lenses
US3883228A (en) * 1973-07-09 1975-05-13 Minnesota Mining & Mfg Variable magnification zoom lens
JPS5852201B2 (ja) * 1974-04-04 1983-11-21 ミノルタ株式会社 変倍レンズ
CH580821A5 (ru) * 1974-06-13 1976-12-15 Bertele Ludwig
US4009928A (en) * 1975-06-27 1977-03-01 Back Frank G Three element varifocal lens systems
US4056308A (en) * 1976-03-03 1977-11-01 Xerox Corporation Variable focal length reflector lens system
DE2703914C2 (de) * 1976-03-03 1986-06-26 Xerox Corp., Rochester, N.Y. Vario-Objektiv zur Abbildung zwischen einem festen endlichen Objekt-/Bildebenenabstand

Also Published As

Publication number Publication date
FR2408846A1 (fr) 1979-06-08
US4247168A (en) 1981-01-27
IT7851471A0 (it) 1978-10-11
IT1106040B (it) 1985-11-11
FR2408846B1 (ru) 1984-01-13
GB2008789B (en) 1982-04-07
DE2849128A1 (de) 1979-05-17
JPS5491223A (en) 1979-07-19
DE2849128C2 (ru) 1989-11-23
GB2008789A (en) 1979-06-06

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Legal Events

Date Code Title Description
PL Patent ceased