GB1064323A - Improvements in or relating to optical objectives of variable equivalent focal length - Google Patents

Improvements in or relating to optical objectives of variable equivalent focal length

Info

Publication number
GB1064323A
GB1064323A GB35088/62A GB3508862A GB1064323A GB 1064323 A GB1064323 A GB 1064323A GB 35088/62 A GB35088/62 A GB 35088/62A GB 3508862 A GB3508862 A GB 3508862A GB 1064323 A GB1064323 A GB 1064323A
Authority
GB
United Kingdom
Prior art keywords
objective
range
component
equivalent focal
focal length
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
GB35088/62A
Other languages
English (en)
Inventor
Gordon Henry Cook
Peter Arnold Merigold
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
Priority to GB35088/62A priority Critical patent/GB1064323A/en
Priority to DER36100A priority patent/DE1289327B/de
Priority to FR947414A priority patent/FR1376655A/fr
Priority to CH1131563A priority patent/CH411383A/fr
Priority to JP38049040A priority patent/JPS5231743B1/ja
Publication of GB1064323A publication Critical patent/GB1064323A/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)
GB35088/62A 1962-09-14 1962-09-14 Improvements in or relating to optical objectives of variable equivalent focal length Expired GB1064323A (en)

Priority Applications (5)

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
DER36100A DE1289327B (de) 1962-09-14 1963-09-12 Objektiv mit veraenderbarer aequivalenter Brennweite
FR947414A FR1376655A (fr) 1962-09-14 1963-09-13 Perfectionnements aux objectifs à focale variable
CH1131563A CH411383A (fr) 1962-09-14 1963-09-13 Objectif optique à longueur focale variable
JP38049040A JPS5231743B1 (enExample) 1962-09-14 1963-09-14

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
GB1064323A true GB1064323A (en) 1967-04-05

Family

ID=10373658

Family Applications (1)

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

Country Status (5)

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

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316499A (en) * 1996-08-12 1998-02-25 Asahi Optical Co Ltd Fast aspherical four group zoom lens system
GB2316500A (en) * 1996-08-12 1998-02-25 Asahi Optical Co Ltd Four group zoom lens system having high zoom ratio
CN105676434A (zh) * 2016-04-27 2016-06-15 佛山华国光学器材有限公司 一种透雾60x大变倍光学系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1520489A (fr) * 1967-01-25 1968-04-12 Optique Prec Soc D Objectif à distance focale variable

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 (de) * 1959-04-20 1961-06-22 Dresden Feinmess Lichtstarkes Objektiv veraenderlicher Brennweite mit einem mindest 6-fachen Variationsbereich

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2316499A (en) * 1996-08-12 1998-02-25 Asahi Optical Co Ltd Fast aspherical four group zoom lens system
GB2316500A (en) * 1996-08-12 1998-02-25 Asahi Optical Co Ltd Four group zoom lens system having high zoom ratio
US5815323A (en) * 1996-08-12 1998-09-29 Asahi Kogaku Kogyo Kabushiki Kaisha Fast aspherical zoom lens system
US5815322A (en) * 1996-08-12 1998-09-29 Asahi Kogaku Kogyo Kabushiki Kaisha Zoom lens system having high zoom ratio
GB2316500B (en) * 1996-08-12 2000-10-11 Asahi Optical Co Ltd Four group zoom lens system having high zoom ratio
GB2316499B (en) * 1996-08-12 2001-01-03 Asahi Optical Co Ltd Fast aspherical four group zoom lens system
DE19734919B4 (de) * 1996-08-12 2005-02-10 Pentax Corp. Varioobjektiv
CN105676434A (zh) * 2016-04-27 2016-06-15 佛山华国光学器材有限公司 一种透雾60x大变倍光学系统
CN105676434B (zh) * 2016-04-27 2018-08-21 佛山华国光学器材有限公司 一种透雾60x大变倍光学系统

Also Published As

Publication number Publication date
FR1376655A (fr) 1964-10-31
CH411383A (fr) 1966-04-15
DE1289327B (de) 1969-02-13
JPS5231743B1 (enExample) 1977-08-17

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