CH386129A - Système optique à distance focale variable - Google Patents

Système optique à distance focale variable

Info

Publication number
CH386129A
CH386129A CH221062A CH221062A CH386129A CH 386129 A CH386129 A CH 386129A CH 221062 A CH221062 A CH 221062A CH 221062 A CH221062 A CH 221062A CH 386129 A CH386129 A CH 386129A
Authority
CH
Switzerland
Prior art keywords
optical system
focal length
variable focal
length optical
variable
Prior art date
Application number
CH221062A
Other languages
English (en)
Inventor
Higuchi Takashi
Original Assignee
Nippon Kogaku Kk
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 Nippon Kogaku Kk filed Critical Nippon Kogaku Kk
Publication of CH386129A publication Critical patent/CH386129A/fr

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
    • G02B15/1425—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 negative

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
CH221062A 1961-02-28 1962-02-22 Système optique à distance focale variable CH386129A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP614261 1961-02-28

Publications (1)

Publication Number Publication Date
CH386129A true CH386129A (fr) 1964-12-31

Family

ID=11630248

Family Applications (1)

Application Number Title Priority Date Filing Date
CH221062A CH386129A (fr) 1961-02-28 1962-02-22 Système optique à distance focale variable

Country Status (3)

Country Link
US (1) US3143590A (fr)
CH (1) CH386129A (fr)
DE (1) DE1236817B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630599A (en) * 1970-10-21 1971-12-28 Xerox Corp Mechanically compensated zoom lens system
JPS4923912B1 (fr) * 1970-12-15 1974-06-19
JPS492548A (fr) * 1972-04-18 1974-01-10
GB1523492A (en) * 1974-12-28 1978-09-06 Nippon Kogaku Kk Zoom lens system
JPS6034734B2 (ja) * 1975-08-22 1985-08-10 キヤノン株式会社 ズ−ムレンズ系
JPS5232342A (en) * 1975-09-08 1977-03-11 Canon Inc Variable magnification optical unit
US4159165A (en) * 1976-12-15 1979-06-26 Vivitar Corporation Zoom lens
JPS5535334A (en) * 1978-09-01 1980-03-12 Fuji Photo Optical Co Ltd Posterior iris zoom lens
JP2011081185A (ja) * 2009-10-07 2011-04-21 Olympus Imaging Corp ズームレンズおよびそれを用いた撮像装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609727A (en) * 1948-01-10 1952-09-09 Emel Ets Object-glass with a variable focal length
US2704487A (en) * 1952-07-22 1955-03-22 Optical system of variable focal length
FR1259007A (fr) * 1960-03-09 1961-04-21 Chalier & Cie Objectif à distance focale variable de construction simple
US3064533A (en) * 1960-05-16 1962-11-20 Bausch & Lomb Photographic objective

Also Published As

Publication number Publication date
DE1236817B (de) 1967-03-16
US3143590A (en) 1964-08-04

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