JPS5366221A - Variable focal distance optical device - Google Patents

Variable focal distance optical device

Info

Publication number
JPS5366221A
JPS5366221A JP14008877A JP14008877A JPS5366221A JP S5366221 A JPS5366221 A JP S5366221A JP 14008877 A JP14008877 A JP 14008877A JP 14008877 A JP14008877 A JP 14008877A JP S5366221 A JPS5366221 A JP S5366221A
Authority
JP
Japan
Prior art keywords
optical device
focal distance
variable focal
distance optical
variable
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
JP14008877A
Other languages
English (en)
Inventor
Haatoman Rudorufu
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.)
Bell and Howell Co
Original Assignee
Bell and Howell Co
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 Bell and Howell Co filed Critical Bell and Howell Co
Publication of JPS5366221A publication Critical patent/JPS5366221A/ja
Pending 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
    • G02B15/22—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 movable lens means specially adapted for focusing at close distances

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)
  • Lens Barrels (AREA)
JP14008877A 1976-11-24 1977-11-24 Variable focal distance optical device Pending JPS5366221A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US74483576A 1976-11-24 1976-11-24

Publications (1)

Publication Number Publication Date
JPS5366221A true JPS5366221A (en) 1978-06-13

Family

ID=24994147

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14008877A Pending JPS5366221A (en) 1976-11-24 1977-11-24 Variable focal distance optical device

Country Status (2)

Country Link
JP (1) JPS5366221A (ja)
GB (1) GB1595350A (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1125361C (zh) * 1995-07-07 2003-10-22 宾得株式会社 有变焦距透镜镜筒的摄影机
GB2335500A (en) * 1995-07-07 1999-09-22 Asahi Optical Co Ltd Camera zoom lens barrel withdrawable into camera

Also Published As

Publication number Publication date
GB1595350A (en) 1981-08-12

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