FR1120271A - Variable focal length lens - Google Patents

Variable focal length lens

Info

Publication number
FR1120271A
FR1120271A FR1120271DA FR1120271A FR 1120271 A FR1120271 A FR 1120271A FR 1120271D A FR1120271D A FR 1120271DA FR 1120271 A FR1120271 A FR 1120271A
Authority
FR
France
Prior art keywords
focal length
length lens
variable focal
variable
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)
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
Application granted granted Critical
Publication of FR1120271A publication Critical patent/FR1120271A/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
    • G02B15/143—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)
  • Lenses (AREA)
FR1120271D 1955-01-24 1955-01-24 Variable focal length lens Expired FR1120271A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1120271T 1955-01-24
FR67970T 1955-07-02

Publications (1)

Publication Number Publication Date
FR1120271A true FR1120271A (en) 1956-07-03

Family

ID=62488927

Family Applications (2)

Application Number Title Priority Date Filing Date
FR1120271D Expired FR1120271A (en) 1955-01-24 1955-01-24 Variable focal length lens
FR67970D Expired FR67970E (en) 1955-01-24 1955-07-02 Variable focal length lens

Family Applications After (1)

Application Number Title Priority Date Filing Date
FR67970D Expired FR67970E (en) 1955-01-24 1955-07-02 Variable focal length lens

Country Status (2)

Country Link
US (1) US2847907A (en)
FR (2) FR1120271A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2937572A (en) * 1958-01-14 1960-05-24 Canon Camera Co Varifocal lens systems
US2959101A (en) * 1957-09-20 1960-11-08 Bell & Howell Co Optical objective of variable equivalent focal length
US3038378A (en) * 1959-01-12 1962-06-12 Bell & Howell Co Variable focal length optical objective
DE1274375B (en) * 1963-05-06 1968-08-01 Eastman Kodak Co Pancratic lens system
US3547523A (en) * 1967-07-13 1970-12-15 Konishiroku Photo Ind Zoom objective lens system with highly reduced secondary chromatic aberration
US4232942A (en) * 1977-05-18 1980-11-11 Canon Kabushiki Kaisha Optically compensated zoom lens

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL113810C (en) * 1957-10-02
US3004471A (en) * 1958-06-06 1961-10-17 Taylor Taylor & Hobson Ltd Control devices for optical objectives of variable focal length
US3027805A (en) * 1958-10-22 1962-04-03 Canon Camera Co Zoom lens system
NL238193A (en) * 1958-11-13
US2925010A (en) * 1959-01-15 1960-02-16 Wollensak Optical Co Variable focal length lens
DE1197243B (en) * 1960-08-05 1965-07-22 Schneider Co Optische Werke Bright photographic or cinematographic lens with variable focal length
DE1093580B (en) * 1959-02-17 1960-11-24 Schneider Co Optische Werke Bright photographic or cinematographic lens with variable focal length
NL255490A (en) * 1959-09-03
US3074318A (en) * 1959-09-05 1963-01-22 Canon Camera Co Zoom lens system
DE1167555B (en) * 1959-11-25 1964-04-09 Kodak Ag Afocal lens attachment system with variable magnification
DE1218178B (en) * 1959-12-24 1966-06-02 Bell & Howell Co Lens with continuously changeable focal length
US3074317A (en) * 1959-12-24 1963-01-22 Bell & Howell Co Zoom lens
US3000259A (en) * 1960-03-07 1961-09-19 Revere Camera Co Variable magnification lens system
US3160699A (en) * 1960-06-27 1964-12-08 Canon Camera Co Photographic zoom objective
US3220307A (en) * 1960-12-05 1965-11-30 James E Thurow Variable focal length lens system having linear differential motion between lens unit
DE1197644B (en) * 1960-12-31 1965-07-29 Rodenstock Optik G Optical system with adjustable focal length
DE1250650B (en) * 1961-07-26
DE1248326B (en) * 1961-08-15 1967-08-24 Nippon Kogaku Kk Pancratic lens
DE1255945B (en) * 1961-12-30 1967-12-07 Agfa Ag Variable focal length projection lens
US3377119A (en) * 1963-01-21 1968-04-09 Canon Camera Co Mechanically compensated zoom lens system
US3366437A (en) * 1963-03-23 1968-01-30 Sankyo Kigaku Kogyo Kabushiki Zoom lens having two movable negative lens members disposed between two positive lens members
DE1286308B (en) * 1966-09-14 1969-01-02 Asahi Optical Co Ltd Lens changeable focal length
DE1263338B (en) * 1967-04-13 1968-03-14 Nippon Kogaku Kk Pancratic lens
JPS4841903B1 (en) * 1969-07-12 1973-12-10
JPS5023814B1 (en) * 1970-07-25 1975-08-11
JPS5712967B2 (en) * 1973-12-07 1982-03-13
US4462664A (en) * 1979-10-05 1984-07-31 Vivitar Corporation Zoom lens
US4629291A (en) * 1980-10-01 1986-12-16 Vivitar Corporation Zoom lens
JPS5937518A (en) * 1982-08-25 1984-03-01 Asahi Optical Co Ltd Zoom lens with high variable power ratio covering wide angle

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2165341A (en) * 1936-07-28 1939-07-11 Eastman Kodak Co Photographic objective
US2179850A (en) * 1937-03-17 1939-11-14 American Optical Corp Optical system for measuring changes in magnification
US2353565A (en) * 1943-11-04 1944-07-11 Isadore Nochlin And Sam Schwar Optical view finder
US2514239A (en) * 1948-07-02 1950-07-04 Watson W & Sons Ltd Variable magnification optical system
US2566485A (en) * 1949-01-28 1951-09-04 Optique & De Mecanique De Haut Auxiliary optical device with variable magnifying power
NL90813C (en) * 1950-07-18
US2649025A (en) * 1950-09-22 1953-08-18 Taylor Taylor & Hobson Ltd Optical objective of variable focal length
FR1081948A (en) * 1953-05-13 1954-12-23 Optique & De Mecanique De Haut New optical device with variable focal length

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2959101A (en) * 1957-09-20 1960-11-08 Bell & Howell Co Optical objective of variable equivalent focal length
US2937572A (en) * 1958-01-14 1960-05-24 Canon Camera Co Varifocal lens systems
US3038378A (en) * 1959-01-12 1962-06-12 Bell & Howell Co Variable focal length optical objective
DE1274375B (en) * 1963-05-06 1968-08-01 Eastman Kodak Co Pancratic lens system
US3547523A (en) * 1967-07-13 1970-12-15 Konishiroku Photo Ind Zoom objective lens system with highly reduced secondary chromatic aberration
US4232942A (en) * 1977-05-18 1980-11-11 Canon Kabushiki Kaisha Optically compensated zoom lens

Also Published As

Publication number Publication date
FR67970E (en) 1958-03-26
US2847907A (en) 1958-08-19

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