JPH0313566B2 - - Google Patents

Info

Publication number
JPH0313566B2
JPH0313566B2 JP58075939A JP7593983A JPH0313566B2 JP H0313566 B2 JPH0313566 B2 JP H0313566B2 JP 58075939 A JP58075939 A JP 58075939A JP 7593983 A JP7593983 A JP 7593983A JP H0313566 B2 JPH0313566 B2 JP H0313566B2
Authority
JP
Japan
Prior art keywords
lens
group
refractive power
negative
positive
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 - Lifetime
Application number
JP58075939A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59201014A (ja
Inventor
Yoshinobu Asakura
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.)
Nitto Optical Co Ltd
Original Assignee
Nitto 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 Nitto Optical Co Ltd filed Critical Nitto Optical Co Ltd
Priority to JP58075939A priority Critical patent/JPS59201014A/ja
Publication of JPS59201014A publication Critical patent/JPS59201014A/ja
Publication of JPH0313566B2 publication Critical patent/JPH0313566B2/ja
Granted 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 +-++

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
JP58075939A 1983-04-28 1983-04-28 ズ−ムレンズ Granted JPS59201014A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58075939A JPS59201014A (ja) 1983-04-28 1983-04-28 ズ−ムレンズ

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58075939A JPS59201014A (ja) 1983-04-28 1983-04-28 ズ−ムレンズ

Publications (2)

Publication Number Publication Date
JPS59201014A JPS59201014A (ja) 1984-11-14
JPH0313566B2 true JPH0313566B2 (enExample) 1991-02-22

Family

ID=13590707

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58075939A Granted JPS59201014A (ja) 1983-04-28 1983-04-28 ズ−ムレンズ

Country Status (1)

Country Link
JP (1) JPS59201014A (enExample)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55124116A (en) * 1979-03-17 1980-09-25 Tamuron:Kk Bright zoom lens exhibiting changing soft effect
JPS57161804A (en) * 1981-03-31 1982-10-05 Tokinaa Kogaku Kk Zoom lens system
JPS57161824A (en) * 1981-03-31 1982-10-05 Tokinaa Kogaku Kk Zoom lens system

Also Published As

Publication number Publication date
JPS59201014A (ja) 1984-11-14

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