FR1110863A - Variable focus lens system for an optical lens - Google Patents

Variable focus lens system for an optical lens

Info

Publication number
FR1110863A
FR1110863A FR1110863DA FR1110863A FR 1110863 A FR1110863 A FR 1110863A FR 1110863D A FR1110863D A FR 1110863DA FR 1110863 A FR1110863 A FR 1110863A
Authority
FR
France
Prior art keywords
variable focus
lens system
optical lens
focus lens
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
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 FR1110863A publication Critical patent/FR1110863A/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
    • G02B15/142—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 two groups only
    • G02B15/1421—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 two groups only the first group being positive

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
FR1110863D 1953-07-28 1954-07-26 Variable focus lens system for an optical lens Expired FR1110863A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20913/53A GB748910A (en) 1953-07-28 1953-07-28 Improvements in or relating to a variable focus lens attachment for an optical objective

Publications (1)

Publication Number Publication Date
FR1110863A true FR1110863A (en) 1956-02-17

Family

ID=10153919

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1110863D Expired FR1110863A (en) 1953-07-28 1954-07-26 Variable focus lens system for an optical lens

Country Status (2)

Country Link
FR (1) FR1110863A (en)
GB (1) GB748910A (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2956475A (en) * 1958-07-21 1960-10-18 Bell & Howell Co Wide angle lens attachment
AT351829B (en) * 1976-11-15 1979-08-10 Bolex Int Sa OPTICAL SYSTEM
GB2532407A (en) * 2014-09-19 2016-05-25 Jeffrey Barlow John Focusing attachment

Also Published As

Publication number Publication date
GB748910A (en) 1956-05-16

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