FR2288322A1 - Objectif a focale variable - Google Patents

Objectif a focale variable

Info

Publication number
FR2288322A1
FR2288322A1 FR7531231A FR7531231A FR2288322A1 FR 2288322 A1 FR2288322 A1 FR 2288322A1 FR 7531231 A FR7531231 A FR 7531231A FR 7531231 A FR7531231 A FR 7531231A FR 2288322 A1 FR2288322 A1 FR 2288322A1
Authority
FR
France
Prior art keywords
variable focal
focal objective
objective
variable
focal
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
FR7531231A
Other languages
English (en)
French (fr)
Other versions
FR2288322B1 (enExample
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak 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 Eastman Kodak Co filed Critical Eastman Kodak Co
Publication of FR2288322A1 publication Critical patent/FR2288322A1/fr
Application granted granted Critical
Publication of FR2288322B1 publication Critical patent/FR2288322B1/fr
Granted 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
    • G02B13/18—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
    • G02B15/143—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)
FR7531231A 1974-10-18 1975-10-13 Objectif a focale variable Granted FR2288322A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/516,239 US3972592A (en) 1974-10-18 1974-10-18 Zoom projection lens

Publications (2)

Publication Number Publication Date
FR2288322A1 true FR2288322A1 (fr) 1976-05-14
FR2288322B1 FR2288322B1 (enExample) 1979-04-27

Family

ID=24054718

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7531231A Granted FR2288322A1 (fr) 1974-10-18 1975-10-13 Objectif a focale variable

Country Status (3)

Country Link
US (1) US3972592A (enExample)
DE (1) DE2546930A1 (enExample)
FR (1) FR2288322A1 (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466785A1 (fr) * 1979-09-28 1981-04-10 Philips Nv Objectif a focale variable suivant de grands rapports comportant des surfaces aspheriques
WO2000070407A1 (de) * 1999-05-14 2000-11-23 Carl Zeiss Projektionsobjektiv für die mikrolithographie

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297007A (en) * 1979-04-24 1981-10-27 Polaroid Corporation Optical apparatus and method for changing a zoom camera to a fixed focus camera
JPS56147113A (en) * 1980-04-18 1981-11-14 Canon Inc Zoom lens
JPS57176015A (en) * 1981-04-22 1982-10-29 Nippon Kogaku Kk <Nikon> Zoom lens system
JPS5865407A (ja) * 1981-10-15 1983-04-19 Nippon Kogaku Kk <Nikon> ズ−ムレンズ系
US4653872A (en) * 1981-04-22 1987-03-31 Nippon Kogaku K. K. Athermalized zoom lens system
JPH0617938B2 (ja) * 1982-08-16 1994-03-09 オリンパス光学工業株式会社 ズームレンズ
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
JPH06100722B2 (ja) * 1986-02-27 1994-12-12 オリンパス光学工業株式会社 可変焦点距離レンズ
FR2623298B1 (fr) * 1986-09-23 1990-10-05 Trt Telecom Radio Electr Systeme optique bifocal infrarouge
US4984876A (en) * 1987-09-16 1991-01-15 Minolta Camera Kabushiki Kaisha Zoom lens system
JP2558138B2 (ja) * 1988-02-08 1996-11-27 オリンパス光学工業株式会社 変倍レンズ
JPH01315710A (ja) * 1988-06-16 1989-12-20 Olympus Optical Co Ltd ズームレンズ
JP3262374B2 (ja) * 1992-07-08 2002-03-04 キヤノン株式会社 ズームレンズ
JP3330660B2 (ja) * 1992-07-20 2002-09-30 株式会社リコー 変倍ファインダー
TWI574040B (zh) 2016-04-15 2017-03-11 大立光電股份有限公司 光學成像系統組、取像裝置及電子裝置
TWI637212B (zh) 2017-10-27 2018-10-01 大立光電股份有限公司 光學成像鏡頭、取像裝置及電子裝置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB240508A (en) * 1924-05-06 1925-10-06 Arthur Warmisham Improved lens systems
US2377268A (en) * 1939-10-10 1945-05-29 Rinia Herre Optical system
US2530397A (en) * 1948-02-18 1950-11-21 Ancillary Henry L Beigel Anastigmatic lens
US2649025A (en) * 1950-09-22 1953-08-18 Taylor Taylor & Hobson Ltd Optical objective of variable focal length
DE898361C (de) * 1940-12-06 1953-11-30 Zeiss Carl Fa Photographisches Objektiv
US3194139A (en) * 1962-03-05 1965-07-13 Eastman Kodak Co Zoom camera system
US3220307A (en) * 1960-12-05 1965-11-30 James E Thurow Variable focal length lens system having linear differential motion between lens unit
US3330615A (en) * 1963-05-06 1967-07-11 Eastman Kodak Co Zoom lens

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB240508A (en) * 1924-05-06 1925-10-06 Arthur Warmisham Improved lens systems
US2377268A (en) * 1939-10-10 1945-05-29 Rinia Herre Optical system
DE898361C (de) * 1940-12-06 1953-11-30 Zeiss Carl Fa Photographisches Objektiv
US2530397A (en) * 1948-02-18 1950-11-21 Ancillary Henry L Beigel Anastigmatic lens
US2649025A (en) * 1950-09-22 1953-08-18 Taylor Taylor & Hobson Ltd Optical objective of variable focal length
US3220307A (en) * 1960-12-05 1965-11-30 James E Thurow Variable focal length lens system having linear differential motion between lens unit
US3194139A (en) * 1962-03-05 1965-07-13 Eastman Kodak Co Zoom camera system
US3330615A (en) * 1963-05-06 1967-07-11 Eastman Kodak Co Zoom lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2466785A1 (fr) * 1979-09-28 1981-04-10 Philips Nv Objectif a focale variable suivant de grands rapports comportant des surfaces aspheriques
WO2000070407A1 (de) * 1999-05-14 2000-11-23 Carl Zeiss Projektionsobjektiv für die mikrolithographie

Also Published As

Publication number Publication date
US3972592A (en) 1976-08-03
DE2546930A1 (de) 1976-04-29
FR2288322B1 (enExample) 1979-04-27

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Legal Events

Date Code Title Description
ST Notification of lapse