FR1213899A - Enhancements to Variable Focal Length Optical Lens Control Systems - Google Patents

Enhancements to Variable Focal Length Optical Lens Control Systems

Info

Publication number
FR1213899A
FR1213899A FR1213899DA FR1213899A FR 1213899 A FR1213899 A FR 1213899A FR 1213899D A FR1213899D A FR 1213899DA FR 1213899 A FR1213899 A FR 1213899A
Authority
FR
France
Prior art keywords
enhancements
focal length
optical lens
control systems
lens control
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
Other languages
French (fr)
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.)
TAYLOR
Taylor Taylor and Hobson Ltd
Original Assignee
TAYLOR
Taylor Taylor and Hobson 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 TAYLOR, Taylor Taylor and Hobson Ltd filed Critical TAYLOR
Application granted granted Critical
Publication of FR1213899A publication Critical patent/FR1213899A/en
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
    • 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)
  • Lens Barrels (AREA)
  • Telescopes (AREA)
FR1213899D 1958-06-06 1958-11-03 Enhancements to Variable Focal Length Optical Lens Control Systems Expired FR1213899A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18134/58A GB899635A (en) 1958-06-06 1958-06-06 Improvements in or relating to control devices for optical objectives of variable focal length

Publications (1)

Publication Number Publication Date
FR1213899A true FR1213899A (en) 1960-04-05

Family

ID=10107230

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1213899D Expired FR1213899A (en) 1958-06-06 1958-11-03 Enhancements to Variable Focal Length Optical Lens Control Systems

Country Status (4)

Country Link
CH (1) CH367642A (en)
FR (1) FR1213899A (en)
GB (1) GB899635A (en)
NL (1) NL232999A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136131B (en) * 1960-06-18 1962-09-06 Elbe Kamera Gmbh Lens with variable focal length

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4156933A (en) * 1977-07-28 1979-05-29 Pandres Dave Jr Ratio preserving control system
WO1979000072A1 (en) * 1977-07-28 1979-02-22 D Pandres Ratio preserving control system
JPS5952402B2 (en) * 1980-02-18 1984-12-19 株式会社三協精機製作所 zoom lens barrel
GB2237406B (en) * 1989-10-27 1993-11-03 Asahi Optical Co Ltd Zoom lens barrel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1136131B (en) * 1960-06-18 1962-09-06 Elbe Kamera Gmbh Lens with variable focal length

Also Published As

Publication number Publication date
CH367642A (en) 1963-02-28
GB899635A (en) 1962-06-27
NL232999A (en)

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