DE2849128A1 - Zoom-objektiv - Google Patents

Zoom-objektiv

Info

Publication number
DE2849128A1
DE2849128A1 DE19782849128 DE2849128A DE2849128A1 DE 2849128 A1 DE2849128 A1 DE 2849128A1 DE 19782849128 DE19782849128 DE 19782849128 DE 2849128 A DE2849128 A DE 2849128A DE 2849128 A1 DE2849128 A1 DE 2849128A1
Authority
DE
Germany
Prior art keywords
lens
sleeve
mount
links
lens according
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
DE19782849128
Other languages
German (de)
English (en)
Other versions
DE2849128C2 (US07223432-20070529-C00017.png
Inventor
Fred Dr Mast
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.)
Gretag AG
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
Publication of DE2849128A1 publication Critical patent/DE2849128A1/de
Application granted granted Critical
Publication of DE2849128C2 publication Critical patent/DE2849128C2/de
Granted legal-status Critical Current

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)
  • Lens Barrels (AREA)
  • Automatic Focus Adjustment (AREA)
DE19782849128 1977-11-15 1978-11-13 Zoom-objektiv Granted DE2849128A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1392277A CH621414A5 (US07223432-20070529-C00017.png) 1977-11-15 1977-11-15

Publications (2)

Publication Number Publication Date
DE2849128A1 true DE2849128A1 (de) 1979-05-17
DE2849128C2 DE2849128C2 (US07223432-20070529-C00017.png) 1989-11-23

Family

ID=4396495

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782849128 Granted DE2849128A1 (de) 1977-11-15 1978-11-13 Zoom-objektiv

Country Status (7)

Country Link
US (1) US4247168A (US07223432-20070529-C00017.png)
JP (1) JPS5491223A (US07223432-20070529-C00017.png)
CH (1) CH621414A5 (US07223432-20070529-C00017.png)
DE (1) DE2849128A1 (US07223432-20070529-C00017.png)
FR (1) FR2408846A1 (US07223432-20070529-C00017.png)
GB (1) GB2008789B (US07223432-20070529-C00017.png)
IT (1) IT1106040B (US07223432-20070529-C00017.png)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263397A2 (en) * 1986-09-30 1988-04-13 Canon Kabushiki Kaisha A variable magnification copying apparatus
US10676676B2 (en) 2016-04-04 2020-06-09 Arq Ip Limited Solid-liquid crude oil compositions and fractionation processes thereof
US11254886B2 (en) 2016-04-04 2022-02-22 Arq Ip Limited Fuel oil / particulate material slurry compositions and processes

Families Citing this family (3)

* 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
US6657670B1 (en) * 1999-03-16 2003-12-02 Teco Image Systems Co., Ltd. Diaphragm structure of digital still camera
CN102791155B (zh) 2009-12-25 2015-05-27 Ykk株式会社 钮扣安装用上模

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE650907C (de) * 1934-08-28 1937-10-05 Hugh Iwan Gramatzki Optisches System
US2663223A (en) * 1950-07-18 1953-12-22 Watson W & Sons Ltd Variable magnification optical system
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
GB1386175A (en) * 1972-06-02 1975-03-05 Rank Organisation Ltd Lenses
DE2514401A1 (de) * 1974-04-04 1975-10-30 Minolta Camera Kk Varioobjektivsystem
US4009928A (en) * 1975-06-27 1977-03-01 Back Frank G Three element varifocal lens systems
FR2343268A1 (fr) * 1976-03-03 1977-09-30 Xerox Corp Objectif a distance focale variable
US4056308A (en) * 1976-03-03 1977-11-01 Xerox Corporation Variable focal length reflector lens system
DE2036285B2 (de) * 1969-08-14 1980-01-31 Hauser, Raimund, Ddr. Pankratisches Projektionsobjektiv

Family Cites Families (8)

* 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
US2159394A (en) * 1936-06-09 1939-05-23 Paramount Productions Inc Variable equivalent focal length lens
US3625595A (en) * 1970-01-26 1971-12-07 Bell & Howell Co Self-compensating symmetrical lens system
JPS491242A (US07223432-20070529-C00017.png) * 1972-04-17 1974-01-08
US3752565A (en) * 1972-02-18 1973-08-14 Shima Kogaku Kk Zoom lens apparatus
US3883228A (en) * 1973-07-09 1975-05-13 Minnesota Mining & Mfg Variable magnification zoom lens
CH580821A5 (US07223432-20070529-C00017.png) * 1974-06-13 1976-12-15 Bertele Ludwig

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE650907C (de) * 1934-08-28 1937-10-05 Hugh Iwan Gramatzki Optisches System
US2663223A (en) * 1950-07-18 1953-12-22 Watson W & Sons Ltd Variable magnification optical system
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
DE2036285B2 (de) * 1969-08-14 1980-01-31 Hauser, Raimund, Ddr. Pankratisches Projektionsobjektiv
GB1386175A (en) * 1972-06-02 1975-03-05 Rank Organisation Ltd Lenses
DE2514401A1 (de) * 1974-04-04 1975-10-30 Minolta Camera Kk Varioobjektivsystem
US4009928A (en) * 1975-06-27 1977-03-01 Back Frank G Three element varifocal lens systems
FR2343268A1 (fr) * 1976-03-03 1977-09-30 Xerox Corp Objectif a distance focale variable
US4056308A (en) * 1976-03-03 1977-11-01 Xerox Corporation Variable focal length reflector lens system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263397A2 (en) * 1986-09-30 1988-04-13 Canon Kabushiki Kaisha A variable magnification copying apparatus
EP0263397A3 (en) * 1986-09-30 1988-06-01 Canon Kabushiki Kaisha A variable magnification copying apparatus
US4894682A (en) * 1986-09-30 1990-01-16 Canon Kabushiki Kaisha Variable magnification copying apparatus
US10676676B2 (en) 2016-04-04 2020-06-09 Arq Ip Limited Solid-liquid crude oil compositions and fractionation processes thereof
US11254886B2 (en) 2016-04-04 2022-02-22 Arq Ip Limited Fuel oil / particulate material slurry compositions and processes
US11286438B2 (en) 2016-04-04 2022-03-29 Arq Ip Limited Fuel oil / particulate material slurry compositions and processes
US11319492B2 (en) 2016-04-04 2022-05-03 Arq Ip Limited Solid-liquid crude oil compositions and fractionation processes thereof
US11718794B2 (en) 2016-04-04 2023-08-08 Arq Ip Limited Solid-liquid crude oil compositions and fractionation processes thereof

Also Published As

Publication number Publication date
JPS5491223A (en) 1979-07-19
US4247168A (en) 1981-01-27
DE2849128C2 (US07223432-20070529-C00017.png) 1989-11-23
CH621414A5 (US07223432-20070529-C00017.png) 1981-01-30
FR2408846A1 (fr) 1979-06-08
IT7851471A0 (it) 1978-10-11
FR2408846B1 (US07223432-20070529-C00017.png) 1984-01-13
GB2008789A (en) 1979-06-06
IT1106040B (it) 1985-11-11
GB2008789B (en) 1982-04-07

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Legal Events

Date Code Title Description
8128 New person/name/address of the agent

Representative=s name: SCHWABE, H., DIPL.-ING. SANDMAIR, K., DIPL.-CHEM.

8110 Request for examination paragraph 44
D2 Grant after examination
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee