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JPS5737307A - Focusing mechanism of zoom lens - Google Patents

Focusing mechanism of zoom lens

Info

Publication number
JPS5737307A
JPS5737307A JP11295380A JP11295380A JPS5737307A JP S5737307 A JPS5737307 A JP S5737307A JP 11295380 A JP11295380 A JP 11295380A JP 11295380 A JP11295380 A JP 11295380A JP S5737307 A JPS5737307 A JP S5737307A
Authority
JP
Japan
Prior art keywords
lenses
focusing
cam
zooming
barrel
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
JP11295380A
Other languages
Japanese (ja)
Other versions
JPH0323890B2 (en
Inventor
Mitsuo Onuki
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.)
Konica Minolta Inc
Original Assignee
Konica Minolta Inc
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 Konica Minolta Inc filed Critical Konica Minolta Inc
Priority to JP11295380A priority Critical patent/JPS5737307A/en
Priority to GB8124964A priority patent/GB2084346B/en
Publication of JPS5737307A publication Critical patent/JPS5737307A/en
Priority to US06/586,652 priority patent/US4534625A/en
Publication of JPH0323890B2 publication Critical patent/JPH0323890B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Automatic Focus Adjustment (AREA)
  • Focusing (AREA)
  • Lens Barrels (AREA)

Abstract

PURPOSE:To automatically correct the rate of extension of lenses by having a cam provided with a movement regulating member for focusing lens groups on a lens barrel member and changing the acting position of the cam according to zooming operations. CONSTITUTION:Double helicoid mechanisms are disposed between the inside and outside barrels of a stationary barrel 1 to provide a lens barrel part. A focusing cam 5-1 and a transmission pin 5-2 are provided to a focus control ring 5 held to the helicoid male 3. A focus correcting cam 6-1 is provided to a focusing ring 6 held to the barrel 1 and is engaged to the pin 5-2 to accomplish the correction of the extent of movement of the lenses. Hence, by determining the positions of the respective group lenses by the member moved by the focusing operation and the correcting member moved by the zooming operation, the rate of extension of the lenses is automatically corrected when free zooming is carried out for a focused object.
JP11295380A 1980-08-19 1980-08-19 Focusing mechanism of zoom lens Granted JPS5737307A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP11295380A JPS5737307A (en) 1980-08-19 1980-08-19 Focusing mechanism of zoom lens
GB8124964A GB2084346B (en) 1980-08-19 1981-08-14 A lens tube for a high vari-focal ratio zoom lens
US06/586,652 US4534625A (en) 1980-08-19 1984-03-08 Lens tube for a high vari-focal ratio zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11295380A JPS5737307A (en) 1980-08-19 1980-08-19 Focusing mechanism of zoom lens

Publications (2)

Publication Number Publication Date
JPS5737307A true JPS5737307A (en) 1982-03-01
JPH0323890B2 JPH0323890B2 (en) 1991-03-29

Family

ID=14599656

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11295380A Granted JPS5737307A (en) 1980-08-19 1980-08-19 Focusing mechanism of zoom lens

Country Status (1)

Country Link
JP (1) JPS5737307A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6352111A (en) * 1986-08-22 1988-03-05 Tamuron:Kk Automatic focus adjusting device for internal focusing zoom lens
JPS63314511A (en) * 1987-06-17 1988-12-22 Tamuron:Kk Internal focusing type zoom lens
US5576894A (en) * 1993-10-21 1996-11-19 Minolta Co., Ltd. Zoom lens barrel based on the vari-focal optical system
EP0706071A3 (en) * 1994-10-06 1998-04-22 Konica Corporation A camera with a zooming lens barrel
US5748387A (en) * 1994-02-23 1998-05-05 Nikon Corporation Zoom lens system
US5760971A (en) * 1995-11-28 1998-06-02 Nikon Corporation Zoom lens system
US5764423A (en) * 1996-03-01 1998-06-09 Nikon Corporation Zoom lens system
US5774276A (en) * 1996-02-07 1998-06-30 Nikon Corporation Zoom lens system
US5790317A (en) * 1995-12-13 1998-08-04 Nikon Corporation Zoom lens system
KR100325181B1 (en) * 1999-10-02 2002-02-21 이중구 Barrle assembly of zoom camera

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4484200B2 (en) * 2004-01-19 2010-06-16 菱栄エンジニアリング株式会社 Development method of tooth surface perspective image

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6352111A (en) * 1986-08-22 1988-03-05 Tamuron:Kk Automatic focus adjusting device for internal focusing zoom lens
JPS63314511A (en) * 1987-06-17 1988-12-22 Tamuron:Kk Internal focusing type zoom lens
US5576894A (en) * 1993-10-21 1996-11-19 Minolta Co., Ltd. Zoom lens barrel based on the vari-focal optical system
US5748387A (en) * 1994-02-23 1998-05-05 Nikon Corporation Zoom lens system
EP0706071A3 (en) * 1994-10-06 1998-04-22 Konica Corporation A camera with a zooming lens barrel
US5760971A (en) * 1995-11-28 1998-06-02 Nikon Corporation Zoom lens system
US5790317A (en) * 1995-12-13 1998-08-04 Nikon Corporation Zoom lens system
US5774276A (en) * 1996-02-07 1998-06-30 Nikon Corporation Zoom lens system
US5764423A (en) * 1996-03-01 1998-06-09 Nikon Corporation Zoom lens system
KR100325181B1 (en) * 1999-10-02 2002-02-21 이중구 Barrle assembly of zoom camera

Also Published As

Publication number Publication date
JPH0323890B2 (en) 1991-03-29

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