CH411383A - Variable focal length optical lens - Google Patents

Variable focal length optical lens

Info

Publication number
CH411383A
CH411383A CH1131563A CH1131563A CH411383A CH 411383 A CH411383 A CH 411383A CH 1131563 A CH1131563 A CH 1131563A CH 1131563 A CH1131563 A CH 1131563A CH 411383 A CH411383 A CH 411383A
Authority
CH
Switzerland
Prior art keywords
focal length
optical lens
variable focal
length optical
variable
Prior art date
Application number
CH1131563A
Other languages
French (fr)
Inventor
Henry Cook Gordon
Arnold Merigold Peter
Original Assignee
Rank Precision Ind Limited Tra
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 Rank Precision Ind Limited Tra filed Critical Rank Precision Ind Limited Tra
Publication of CH411383A publication Critical patent/CH411383A/en

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
    • G02B15/16—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group
    • G02B15/163—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group
    • G02B15/167—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses
    • G02B15/17—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 with interdependent non-linearly related movements between one lens or lens group, and another lens or lens group having a first movable lens or lens group and a second movable lens or lens group, both in front of a fixed lens or lens group having an additional fixed front lens or group of lenses 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)
  • Nonlinear Science (AREA)
  • Lenses (AREA)
CH1131563A 1962-09-14 1963-09-13 Variable focal length optical lens CH411383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35088/62A GB1064323A (en) 1962-09-14 1962-09-14 Improvements in or relating to optical objectives of variable equivalent focal length

Publications (1)

Publication Number Publication Date
CH411383A true CH411383A (en) 1966-04-15

Family

ID=10373658

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1131563A CH411383A (en) 1962-09-14 1963-09-13 Variable focal length optical lens

Country Status (5)

Country Link
JP (1) JPS5231743B1 (en)
CH (1) CH411383A (en)
DE (1) DE1289327B (en)
FR (1) FR1376655A (en)
GB (1) GB1064323A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1520489A (en) * 1967-01-25 1968-04-12 Optique Prec Soc D Variable focal length lens
JP3723643B2 (en) * 1996-08-12 2005-12-07 ペンタックス株式会社 High zoom ratio zoom lens system
JPH1054938A (en) * 1996-08-12 1998-02-24 Asahi Optical Co Ltd Large aperture aspherical zoom lens system ]
CN105676434B (en) * 2016-04-27 2018-08-21 佛山华国光学器材有限公司 A kind of big variable-power optical systems of Penetrating Fog 60X

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB760588A (en) * 1953-10-09 1956-11-07 Watson W & Sons Ltd Improvements in or relating to variable magnification optical systems
US2766658A (en) * 1955-05-20 1956-10-16 Schwesinger Gerhard Variable focal length focusing lens system and device therefor
US3038378A (en) * 1959-01-12 1962-06-12 Bell & Howell Co Variable focal length optical objective
DE1109397B (en) * 1959-04-20 1961-06-22 Dresden Feinmess Bright lens of variable focal length with at least 6 times the range of variation

Also Published As

Publication number Publication date
GB1064323A (en) 1967-04-05
DE1289327B (en) 1969-02-13
JPS5231743B1 (en) 1977-08-17
FR1376655A (en) 1964-10-31

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