FR1376655A - Improvements to varifocal lenses - Google Patents

Improvements to varifocal lenses

Info

Publication number
FR1376655A
FR1376655A FR947414A FR947414A FR1376655A FR 1376655 A FR1376655 A FR 1376655A FR 947414 A FR947414 A FR 947414A FR 947414 A FR947414 A FR 947414A FR 1376655 A FR1376655 A FR 1376655A
Authority
FR
France
Prior art keywords
varifocal lenses
varifocal
lenses
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
FR947414A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rank Precision Industries Ltd
Original Assignee
Rank Precision Industries Ltd
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 Industries Ltd filed Critical Rank Precision Industries Ltd
Application granted granted Critical
Publication of FR1376655A publication Critical patent/FR1376655A/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
    • G02B15/16—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)
FR947414A 1962-09-14 1963-09-13 Improvements to varifocal lenses Expired FR1376655A (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
FR1376655A true FR1376655A (en) 1964-10-31

Family

ID=10373658

Family Applications (1)

Application Number Title Priority Date Filing Date
FR947414A Expired FR1376655A (en) 1962-09-14 1963-09-13 Improvements to varifocal lenses

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)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1622993B1 (en) * 1967-01-25 1970-10-29 Optique Prec Soc D Pancratic lens

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1622993B1 (en) * 1967-01-25 1970-10-29 Optique Prec Soc D Pancratic lens

Also Published As

Publication number Publication date
DE1289327B (en) 1969-02-13
JPS5231743B1 (en) 1977-08-17
GB1064323A (en) 1967-04-05
CH411383A (en) 1966-04-15

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