FR1311131A - Improvements to variable focal length lenses - Google Patents

Improvements to variable focal length lenses

Info

Publication number
FR1311131A
FR1311131A FR857439A FR857439A FR1311131A FR 1311131 A FR1311131 A FR 1311131A FR 857439 A FR857439 A FR 857439A FR 857439 A FR857439 A FR 857439A FR 1311131 A FR1311131 A FR 1311131A
Authority
FR
France
Prior art keywords
focal length
variable focal
length lenses
lenses
variable
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
FR857439A
Other languages
French (fr)
Inventor
Pierre Angenieux
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 filed Critical
Priority to FR857439A priority Critical patent/FR1311131A/en
Priority to GB11421/62A priority patent/GB945652A/en
Application granted granted Critical
Publication of FR1311131A publication Critical patent/FR1311131A/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
    • G02B15/1441—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 the first group being positive
    • G02B15/144113—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 the first group being positive arranged +-++
    • 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
    • G02B15/1441—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 the first group being positive
    • G02B15/144109—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 the first group being positive arranged +--+

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Telescopes (AREA)
  • Instruments For Viewing The Inside Of Hollow Bodies (AREA)
FR857439A 1961-03-31 1961-03-31 Improvements to variable focal length lenses Expired FR1311131A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR857439A FR1311131A (en) 1961-03-31 1961-03-31 Improvements to variable focal length lenses
GB11421/62A GB945652A (en) 1961-03-31 1962-03-26 Improvements in or relating to variable focal length or variable magnification lens systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR857439A FR1311131A (en) 1961-03-31 1961-03-31 Improvements to variable focal length lenses

Publications (1)

Publication Number Publication Date
FR1311131A true FR1311131A (en) 1962-12-07

Family

ID=8752140

Family Applications (1)

Application Number Title Priority Date Filing Date
FR857439A Expired FR1311131A (en) 1961-03-31 1961-03-31 Improvements to variable focal length lenses

Country Status (2)

Country Link
FR (1) FR1311131A (en)
GB (1) GB945652A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346320A (en) * 1963-07-17 1967-10-10 Schneider Co Optische Werke High-speed varifocal objective
DE2125352A1 (en) * 1970-05-21 1971-12-02 Kabushiki Kaisha Ricoh, Tokio Afocal lens system with continuously variable magnification or focal length

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6032849B2 (en) * 1977-06-28 1985-07-30 キヤノン株式会社 telescope lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346320A (en) * 1963-07-17 1967-10-10 Schneider Co Optische Werke High-speed varifocal objective
DE2125352A1 (en) * 1970-05-21 1971-12-02 Kabushiki Kaisha Ricoh, Tokio Afocal lens system with continuously variable magnification or focal length

Also Published As

Publication number Publication date
GB945652A (en) 1964-01-08

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