FR2580412B1 - VARIABLE FOCAL LENS DEVICE - Google Patents

VARIABLE FOCAL LENS DEVICE

Info

Publication number
FR2580412B1
FR2580412B1 FR858505364A FR8505364A FR2580412B1 FR 2580412 B1 FR2580412 B1 FR 2580412B1 FR 858505364 A FR858505364 A FR 858505364A FR 8505364 A FR8505364 A FR 8505364A FR 2580412 B1 FR2580412 B1 FR 2580412B1
Authority
FR
France
Prior art keywords
lens device
variable focal
focal lens
variable
lens
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
FR858505364A
Other languages
French (fr)
Other versions
FR2580412A1 (en
Inventor
Gerard Corbasson
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.)
Pierre Angenieux SA
Original Assignee
Pierre Angenieux SA
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 Pierre Angenieux SA filed Critical Pierre Angenieux SA
Priority to FR858505364A priority Critical patent/FR2580412B1/en
Priority claimed from EP86401404A external-priority patent/EP0250686A1/en
Publication of FR2580412A1 publication Critical patent/FR2580412A1/en
Application granted granted Critical
Publication of FR2580412B1 publication Critical patent/FR2580412B1/en
Expired 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
    • G02B15/144—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 four 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
    • G02B15/145—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 five groups only

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
FR858505364A 1985-04-10 1985-04-10 VARIABLE FOCAL LENS DEVICE Expired FR2580412B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR858505364A FR2580412B1 (en) 1985-04-10 1985-04-10 VARIABLE FOCAL LENS DEVICE

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR858505364A FR2580412B1 (en) 1985-04-10 1985-04-10 VARIABLE FOCAL LENS DEVICE
EP86401404A EP0250686A1 (en) 1986-06-26 1986-06-26 Objective system with a variable focal length

Publications (2)

Publication Number Publication Date
FR2580412A1 FR2580412A1 (en) 1986-10-17
FR2580412B1 true FR2580412B1 (en) 1989-02-17

Family

ID=26105806

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858505364A Expired FR2580412B1 (en) 1985-04-10 1985-04-10 VARIABLE FOCAL LENS DEVICE

Country Status (1)

Country Link
FR (1) FR2580412B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0250686A1 (en) * 1986-06-26 1988-01-07 Etablissements Pierre Angenieux Objective system with a variable focal length
CN114994887B (en) * 2022-07-25 2022-10-21 浙江大华技术股份有限公司 Lens and camera device

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB836877A (en) * 1956-04-20 1960-06-09 Watson W & Sons Ltd Improvements in or relating to optical systems
JPS4841903B1 (en) * 1969-07-12 1973-12-10
JPS5119983B2 (en) * 1972-09-20 1976-06-22
FR2220800A1 (en) * 1973-03-06 1974-10-04 Canon Kk
JPS50122209A (en) * 1974-02-18 1975-09-25
US3975089A (en) * 1974-04-19 1976-08-17 Ponder & Best, Inc. Zoom lens
JPS52145051A (en) * 1976-05-27 1977-12-02 Minolta Camera Co Ltd Zoom lens system permitting extra-close-up photographing
JPS58144808A (en) * 1982-02-23 1983-08-29 Konishiroku Photo Ind Co Ltd Focusing system of zoom lens
JPS5940616A (en) * 1982-08-30 1984-03-06 Canon Inc Focusing method of zoom lens

Also Published As

Publication number Publication date
FR2580412A1 (en) 1986-10-17

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Legal Events

Date Code Title Description
TP Transmission of property