FR2547427B1 - Combinaison de lentilles a focale variable - Google Patents

Combinaison de lentilles a focale variable

Info

Publication number
FR2547427B1
FR2547427B1 FR8409062A FR8409062A FR2547427B1 FR 2547427 B1 FR2547427 B1 FR 2547427B1 FR 8409062 A FR8409062 A FR 8409062A FR 8409062 A FR8409062 A FR 8409062A FR 2547427 B1 FR2547427 B1 FR 2547427B1
Authority
FR
France
Prior art keywords
lens combination
variable focal
focal lens
variable
combination
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
FR8409062A
Other languages
English (en)
Other versions
FR2547427A1 (fr
Inventor
Iain Alexander Neil
William Mccreath
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.)
Thales Optronics Ltd
Original Assignee
Thales Optronics Ltd
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 Thales Optronics Ltd filed Critical Thales Optronics Ltd
Publication of FR2547427A1 publication Critical patent/FR2547427A1/fr
Application granted granted Critical
Publication of FR2547427B1 publication Critical patent/FR2547427B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
    • 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
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Lenses (AREA)
FR8409062A 1983-06-09 1984-06-08 Combinaison de lentilles a focale variable Expired FR2547427B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB838315878A GB8315878D0 (en) 1983-06-09 1983-06-09 Zoom lens assembly

Publications (2)

Publication Number Publication Date
FR2547427A1 FR2547427A1 (fr) 1984-12-14
FR2547427B1 true FR2547427B1 (fr) 1988-04-08

Family

ID=10544054

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8409062A Expired FR2547427B1 (fr) 1983-06-09 1984-06-08 Combinaison de lentilles a focale variable

Country Status (3)

Country Link
DE (1) DE3420655A1 (fr)
FR (1) FR2547427B1 (fr)
GB (1) GB8315878D0 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106526818B (zh) * 2016-12-06 2018-11-16 中国航空工业集团公司洛阳电光设备研究所 一种三组联动紧凑型高变倍比红外连续变焦光学***

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
GB1559514A (en) * 1976-10-02 1980-01-23 Pilkington Perkin Elmer Ltd Infra-red zoom lenses
GB2072871B (en) * 1980-03-05 1984-02-22 Barr & Stroud Ltd Afocal refractor telescopes
JPS5729034A (en) * 1980-07-29 1982-02-16 Asahi Optical Co Ltd Control circuit of zoom device

Also Published As

Publication number Publication date
FR2547427A1 (fr) 1984-12-14
DE3420655A1 (de) 1984-12-13
GB8315878D0 (en) 1983-07-13

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Legal Events

Date Code Title Description
ST Notification of lapse