GB1130282A - An improved zoom lens optical system - Google Patents

An improved zoom lens optical system

Info

Publication number
GB1130282A
GB1130282A GB15320/67A GB1532067A GB1130282A GB 1130282 A GB1130282 A GB 1130282A GB 15320/67 A GB15320/67 A GB 15320/67A GB 1532067 A GB1532067 A GB 1532067A GB 1130282 A GB1130282 A GB 1130282A
Authority
GB
United Kingdom
Prior art keywords
lens block
movable
zoom lens
optical system
lens optical
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
GB15320/67A
Inventor
Masaki Isshiki
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.)
Nikon Corp
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
Priority to GB15320/67A priority Critical patent/GB1130282A/en
Publication of GB1130282A publication Critical patent/GB1130282A/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
    • G02B15/144—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
    • G02B15/144113—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 +-++
    • 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
    • G02B15/144105—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)
  • Lenses (AREA)

Abstract

1,130,282. Zoom lenses. NIPPON KOGAKU K. K. April 4, 1967, No. 15320/67. Heading G2J. A zoom lens comprises, from the front, a positive focusing lens block a movable negative lens block, a movable positive lens block and a fixed lens block, the two middle blocks being movable in opposite directions to vary the magnification of the system and the movable positive lens block including two front singlets and a cemented lens group of at least two lenses wherein the foremost singlet has |R 11 | < |R 12 |. Preferably the second singlet has |R 13 | <| R 14 |. Optical data are provided for two examples, one suitable for a 16 m. m. movie camera and the other for a 35 m.m. camera.
GB15320/67A 1967-04-04 1967-04-04 An improved zoom lens optical system Expired GB1130282A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB15320/67A GB1130282A (en) 1967-04-04 1967-04-04 An improved zoom lens optical system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB15320/67A GB1130282A (en) 1967-04-04 1967-04-04 An improved zoom lens optical system

Publications (1)

Publication Number Publication Date
GB1130282A true GB1130282A (en) 1968-10-16

Family

ID=10057000

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15320/67A Expired GB1130282A (en) 1967-04-04 1967-04-04 An improved zoom lens optical system

Country Status (1)

Country Link
GB (1) GB1130282A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157016A (en) * 1984-04-05 1985-10-16 Vivitar Corp Zoom lens having three groups

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2157016A (en) * 1984-04-05 1985-10-16 Vivitar Corp Zoom lens having three groups

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