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FR1210463A - Objectif photographique - Google Patents

Objectif photographique

Info

Publication number
FR1210463A
FR1210463A FR1210463DA FR1210463A FR 1210463 A FR1210463 A FR 1210463A FR 1210463D A FR1210463D A FR 1210463DA FR 1210463 A FR1210463 A FR 1210463A
Authority
FR
France
Prior art keywords
photographic lens
photographic
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
English (en)
Inventor
Frank Gerhardt Back
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
Application granted granted Critical
Publication of FR1210463A publication Critical patent/FR1210463A/fr
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
    • G02B15/143—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
    • G02B15/1435—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 negative

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
FR1210463D 1958-06-27 1958-10-31 Objectif photographique Expired FR1210463A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US745009A US2913957A (en) 1958-06-27 1958-06-27 Varifocal lens assembly

Publications (1)

Publication Number Publication Date
FR1210463A true FR1210463A (fr) 1960-03-09

Family

ID=24994846

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1210463D Expired FR1210463A (fr) 1958-06-27 1958-10-31 Objectif photographique

Country Status (4)

Country Link
US (1) US2913957A (fr)
DE (1) DE1116427B (fr)
FR (1) FR1210463A (fr)
GB (1) GB900249A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294062B (de) * 1959-09-03 1969-04-30 Rank Precision Ind Ltd Pankratisches Objektiv
US3512872A (en) * 1968-07-16 1970-05-19 Wollensak Inc Variable magnification lens system

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3030861A (en) * 1959-06-29 1962-04-24 Bausch & Lomb Variable power optical system for microscopes
NL255490A (fr) * 1959-09-03
US3074318A (en) * 1959-09-05 1963-01-22 Canon Camera Co Zoom lens system
US3011403A (en) * 1959-11-16 1961-12-05 Zoomar Inc Varifocal telescope lens system
NL259582A (fr) * 1960-01-01
US3035487A (en) * 1960-02-15 1962-05-22 Bausch & Lomb Variable power optical system
DE1277581B (de) * 1965-04-03 1968-09-12 Zeiss Carl Fa Photographisches Objektiv kontinuierlich veraenderbarer Brennweite
JPS55127533A (en) * 1979-03-27 1980-10-02 Minolta Camera Co Ltd Optical system of single-lens reflex camera
GB2253281B (en) * 1991-02-15 1994-05-25 Asahi Optical Co Ltd Zoom lens
US7869140B2 (en) * 2007-04-13 2011-01-11 Karl Storz Imaging, Inc. Objective lens design for miniature endoscope

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1584272A (en) * 1923-01-13 1926-05-11 Bertele Ludwig Photographic lens
US2719457A (en) * 1946-08-19 1955-10-04 Farrand Optical Co Inc Scanning telescope having astigmatized pupil
US2566485A (en) * 1949-01-28 1951-09-04 Optique & De Mecanique De Haut Auxiliary optical device with variable magnifying power
US2704487A (en) * 1952-07-22 1955-03-22 Optical system of variable focal length
US2718817A (en) * 1952-10-16 1955-09-27 Frank G Back Varifocal lens system for motion picture and television cameras
CH326225A (fr) * 1953-05-13 1957-12-15 Soc Optique Mec Haute Prec Dispositif optique à distance focale variable
GB760588A (en) * 1953-10-09 1956-11-07 Watson W & Sons Ltd Improvements in or relating to variable magnification optical systems
DE1074874B (de) * 1954-02-18 1960-02-04 Long Island N Y Frank Gerard Back Glen Cove (V St A) Objektiv mit veränderlicher Brennweite

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1294062B (de) * 1959-09-03 1969-04-30 Rank Precision Ind Ltd Pankratisches Objektiv
US3512872A (en) * 1968-07-16 1970-05-19 Wollensak Inc Variable magnification lens system

Also Published As

Publication number Publication date
GB900249A (en) 1962-07-04
DE1116427B (de) 1961-11-02
US2913957A (en) 1959-11-24

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