JPS5740221A - Zoom lens - Google Patents

Zoom lens

Info

Publication number
JPS5740221A
JPS5740221A JP55115660A JP11566080A JPS5740221A JP S5740221 A JPS5740221 A JP S5740221A JP 55115660 A JP55115660 A JP 55115660A JP 11566080 A JP11566080 A JP 11566080A JP S5740221 A JPS5740221 A JP S5740221A
Authority
JP
Japan
Prior art keywords
lens
positive
lenses
groups
subscribed
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.)
Pending
Application number
JP55115660A
Other languages
Japanese (ja)
Inventor
Masatoshi Kimura
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.)
Olympus Corp
Original Assignee
Olympus Corp
Olympus Optical Co 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 Olympus Corp, Olympus Optical Co Ltd filed Critical Olympus Corp
Priority to JP55115660A priority Critical patent/JPS5740221A/en
Priority to DE19813133411 priority patent/DE3133411A1/en
Publication of JPS5740221A publication Critical patent/JPS5740221A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/04—Reversed telephoto objectives
    • 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
    • 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)

Abstract

PURPOSE: To obtain a wide angle zoom lens with the property of effective image formation by satisfying subscribed conditions in the lens system composed of 11 lens groups of a positive and a negative meniscus (M) lenses, a positive M lens, a concave double sided lens, 4 positive lenses, a concave sided lens, and a negative and 2 positive M lenses arranged from th objective side in order.
CONSTITUTION: In a lens system composed of 11 lens groups, i.e., a positive and a negative meniscus (M) lenses, a positive M lens, a concave double sided lens, 4 positive lenses, a concave double sided lens, and a negative and 2 positive M lenses from the objective side in order, the conditions shown in formulas (1)W(10) are satisfied. Where, fI and fII are the composite focal distance of the 1stW4th groups and the 5thW11th groups respectively, r1, r3, r10, r21 and r24 are the radius of curvature of subscribed planes of the 1st, 2nd, 4th, 10th, and 11th groups, d3, d7, d11, and d13 are the thickness of lenses in th 2nd, 3rd, 5th, and 6th groups, d4, d6, d12, and d14 are subscribed air intervals, n1Wn10 and v1Wv4 are subscribed refractive indexes and Abbe's numbers respectively. Thus, the wide angle zoom lens with effective image information is obtained.
COPYRIGHT: (C)1982,JPO&Japio
JP55115660A 1980-08-22 1980-08-22 Zoom lens Pending JPS5740221A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP55115660A JPS5740221A (en) 1980-08-22 1980-08-22 Zoom lens
DE19813133411 DE3133411A1 (en) 1980-08-22 1981-08-24 Wide-angle zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55115660A JPS5740221A (en) 1980-08-22 1980-08-22 Zoom lens

Publications (1)

Publication Number Publication Date
JPS5740221A true JPS5740221A (en) 1982-03-05

Family

ID=14668141

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55115660A Pending JPS5740221A (en) 1980-08-22 1980-08-22 Zoom lens

Country Status (2)

Country Link
JP (1) JPS5740221A (en)
DE (1) DE3133411A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62266511A (en) * 1986-05-14 1987-11-19 Canon Inc Zoom lens

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0666008B2 (en) * 1984-01-18 1994-08-24 オリンパス光学工業株式会社 Large aperture zoom lens
GB201500553D0 (en) 2015-01-14 2015-02-25 Bae Systems Plc Hydraulic Actuators
CN108594408B (en) * 2018-04-13 2020-06-05 北京理工大学 Fifteen times continuous large zooming optical system for visible light in hemispherical space

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62266511A (en) * 1986-05-14 1987-11-19 Canon Inc Zoom lens

Also Published As

Publication number Publication date
DE3133411A1 (en) 1982-04-08

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