JPS57176015A - Zoom lens system - Google Patents

Zoom lens system

Info

Publication number
JPS57176015A
JPS57176015A JP56059685A JP5968581A JPS57176015A JP S57176015 A JPS57176015 A JP S57176015A JP 56059685 A JP56059685 A JP 56059685A JP 5968581 A JP5968581 A JP 5968581A JP S57176015 A JPS57176015 A JP S57176015A
Authority
JP
Japan
Prior art keywords
lens
positive
acryl
negative
group
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.)
Granted
Application number
JP56059685A
Other languages
Japanese (ja)
Other versions
JPH0124284B2 (en
Inventor
Tomokata Takahashi
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
Nikon Corp
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 Nikon Corp, Nippon Kogaku KK filed Critical Nikon Corp
Priority to JP56059685A priority Critical patent/JPS57176015A/en
Priority to US06/367,981 priority patent/US4653872A/en
Priority to GB08211701A priority patent/GB2102142A/en
Priority to DE19823215052 priority patent/DE3215052A1/en
Publication of JPS57176015A publication Critical patent/JPS57176015A/en
Publication of JPH0124284B2 publication Critical patent/JPH0124284B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
    • 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 +-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Abstract

PURPOSE:To prevent a focus from moving in accordance with fluctuations of temperature over the entire variable magnification range by constituting at least one of groups, constituting a magnification variation system, by inorganic glass, and then canceling temperature aberration generated by a plastic lens. CONSTITUTION:A system consists of the 1st positive group G1 for focusing, the 2nd negative group G2 as a variator, the 3rd positive group G3 as a compensator, and the 4th positive group G4, and has a 3 zoom ratio and a 3F value. The G1 consists of a negative lens L1 of polystyrene and a positive lens L2 of acryl, and the G2 consists of a negative lens L4 of acryl, a negative lens L5 of acryl, and a positive lens L6 of inorganic glass; and the G3 consists of a positive lens L7 of acryl, and the G4 consists of a positive lens L8 of inorganic glass, a negative lens L9 of polystyrene, and positive lenses L10 and L11 of acryl. An independent lens in the magnitude variation system which has a temperature aberration coefficient equal to the extent of variation of the whole system is substituted for glass.
JP56059685A 1981-04-22 1981-04-22 Zoom lens system Granted JPS57176015A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56059685A JPS57176015A (en) 1981-04-22 1981-04-22 Zoom lens system
US06/367,981 US4653872A (en) 1981-04-22 1982-04-13 Athermalized zoom lens system
GB08211701A GB2102142A (en) 1981-04-22 1982-04-22 Athermalised zoom lens system comprising mainly plastics lenses
DE19823215052 DE3215052A1 (en) 1981-04-22 1982-04-22 VARIO LENS

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56059685A JPS57176015A (en) 1981-04-22 1981-04-22 Zoom lens system

Publications (2)

Publication Number Publication Date
JPS57176015A true JPS57176015A (en) 1982-10-29
JPH0124284B2 JPH0124284B2 (en) 1989-05-11

Family

ID=13120299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56059685A Granted JPS57176015A (en) 1981-04-22 1981-04-22 Zoom lens system

Country Status (1)

Country Link
JP (1) JPS57176015A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5846313A (en) * 1981-09-16 1983-03-17 Hitachi Ltd Zoom lens
EP1574890A3 (en) * 2004-03-10 2006-11-02 Canon Kabushiki Kaisha Zoom lens and image display apparatus including the zoom lens

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972592A (en) * 1974-10-18 1976-08-03 Eastman Kodak Company Zoom projection lens
JPS55143518A (en) * 1979-04-27 1980-11-08 Nippon Kogaku Kk <Nikon> Lens system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3972592A (en) * 1974-10-18 1976-08-03 Eastman Kodak Company Zoom projection lens
JPS55143518A (en) * 1979-04-27 1980-11-08 Nippon Kogaku Kk <Nikon> Lens system

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5846313A (en) * 1981-09-16 1983-03-17 Hitachi Ltd Zoom lens
JPH0237562B2 (en) * 1981-09-16 1990-08-24 Hitachi Ltd
EP1574890A3 (en) * 2004-03-10 2006-11-02 Canon Kabushiki Kaisha Zoom lens and image display apparatus including the zoom lens
US7215477B2 (en) 2004-03-10 2007-05-08 Canon Kabushiki Kaisha Zoom lens and image display apparatus including the zoom lens

Also Published As

Publication number Publication date
JPH0124284B2 (en) 1989-05-11

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