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FR2626681B1 - Objectif a focale variable permettant une mise au point tres rapprochee - Google Patents

Objectif a focale variable permettant une mise au point tres rapprochee

Info

Publication number
FR2626681B1
FR2626681B1 FR8801167A FR8801167A FR2626681B1 FR 2626681 B1 FR2626681 B1 FR 2626681B1 FR 8801167 A FR8801167 A FR 8801167A FR 8801167 A FR8801167 A FR 8801167A FR 2626681 B1 FR2626681 B1 FR 2626681B1
Authority
FR
France
Prior art keywords
variable focal
focal lens
focusing
closer
closer focusing
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 - Lifetime
Application number
FR8801167A
Other languages
English (en)
Other versions
FR2626681A1 (fr
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 FR8801167A priority Critical patent/FR2626681B1/fr
Publication of FR2626681A1 publication Critical patent/FR2626681A1/fr
Application granted granted Critical
Publication of FR2626681B1 publication Critical patent/FR2626681B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G02B15/22—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 with movable lens means specially adapted for focusing at close distances
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lens Barrels (AREA)
FR8801167A 1988-02-02 1988-02-02 Objectif a focale variable permettant une mise au point tres rapprochee Expired - Lifetime FR2626681B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8801167A FR2626681B1 (fr) 1988-02-02 1988-02-02 Objectif a focale variable permettant une mise au point tres rapprochee

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8801167A FR2626681B1 (fr) 1988-02-02 1988-02-02 Objectif a focale variable permettant une mise au point tres rapprochee

Publications (2)

Publication Number Publication Date
FR2626681A1 FR2626681A1 (fr) 1989-08-04
FR2626681B1 true FR2626681B1 (fr) 1992-11-20

Family

ID=9362848

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8801167A Expired - Lifetime FR2626681B1 (fr) 1988-02-02 1988-02-02 Objectif a focale variable permettant une mise au point tres rapprochee

Country Status (1)

Country Link
FR (1) FR2626681B1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4161756A (en) * 1976-03-19 1979-07-17 Jos. Schneider & Co. Optische Werke Control system for varifocal objective
JPS54126050A (en) * 1978-03-23 1979-09-29 Canon Inc Focusing method preventing variation of angle of view
DE2950951A1 (de) * 1978-12-25 1980-07-10 Canon Kk Photographisches objektiv mit stabilisierung gegen eine bildwinkelaenderung waehrend des fokussierens
JPS57208522A (en) * 1981-06-19 1982-12-21 Nippon Kogaku Kk <Nikon> Zoom lens capable of close-up photographing

Also Published As

Publication number Publication date
FR2626681A1 (fr) 1989-08-04

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Legal Events

Date Code Title Description
TP Transmission of property
ST Notification of lapse
D3 Decision to revoke the decision of lapse
RN Application for restoration