JPS6420513A - Zooming mechanism for zoom lens - Google Patents

Zooming mechanism for zoom lens

Info

Publication number
JPS6420513A
JPS6420513A JP17778487A JP17778487A JPS6420513A JP S6420513 A JPS6420513 A JP S6420513A JP 17778487 A JP17778487 A JP 17778487A JP 17778487 A JP17778487 A JP 17778487A JP S6420513 A JPS6420513 A JP S6420513A
Authority
JP
Japan
Prior art keywords
gear
lens group
moved
circular
zoom
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
JP17778487A
Other languages
Japanese (ja)
Inventor
Hiroshi Akitake
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 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 Optical Co Ltd filed Critical Olympus Optical Co Ltd
Priority to JP17778487A priority Critical patent/JPS6420513A/en
Priority to DE3823714A priority patent/DE3823714C2/en
Priority to US07/218,701 priority patent/US4948235A/en
Publication of JPS6420513A publication Critical patent/JPS6420513A/en
Priority to US07/730,109 priority patent/USRE34059E/en
Pending legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)

Abstract

PURPOSE:To obtain a mechanism whose constitution is simple, by providing a first non-circular gear which rotates interlocking with the forward and backward movement of a zoom frame in an optical axial direction for a fixed member, and a second non-circular gear which turns by being engaged with the first gear and moves another lens group holding frame for the zoom frame. CONSTITUTION:The non-circular gear 9 and the second non-circular gear 10 to be engaged with the above gear are provided coaxially and integrally with a pinion gear 8 on the wide-angle side. When the zoom frame 2 is moved forward by rotating a feed screw 13 by a driving source via a rotation transmission gear 19, the gear 8 being engaged with a rack 7 is moved in a direction of (a), and also, is turned in a direction of arrow head (b), and the gear 9 is also turned in the same direction, and an engaging gear 10 is turned in a direction of (c), thereby, the zoom frame 2 can be advanced to a telephoto side. Thus, the driving pin 18 of another lens group holding frame 4 is moved non-linearly to a focus lens group L1 along a groove hole 10a by turning the gear 10, then, optimum zooming can be performed. Since the shape of the non-circular gears 9 and 10 are formed based on the optical design value of a zoom lens, a lens group L2 can be moved as designed.
JP17778487A 1987-07-13 1987-07-16 Zooming mechanism for zoom lens Pending JPS6420513A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP17778487A JPS6420513A (en) 1987-07-16 1987-07-16 Zooming mechanism for zoom lens
DE3823714A DE3823714C2 (en) 1987-07-13 1988-07-13 Device for continuously adjusting the focal length of a zoom lens
US07/218,701 US4948235A (en) 1987-07-13 1988-07-13 Zooming mechanism for zoom lens
US07/730,109 USRE34059E (en) 1987-07-13 1991-07-15 Zooming mechanism for zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17778487A JPS6420513A (en) 1987-07-16 1987-07-16 Zooming mechanism for zoom lens

Publications (1)

Publication Number Publication Date
JPS6420513A true JPS6420513A (en) 1989-01-24

Family

ID=16037044

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17778487A Pending JPS6420513A (en) 1987-07-13 1987-07-16 Zooming mechanism for zoom lens

Country Status (1)

Country Link
JP (1) JPS6420513A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006145796A (en) * 2004-11-19 2006-06-08 Nikon Corp Microscope
WO2007079882A1 (en) * 2005-12-21 2007-07-19 Carl Zeiss Microimaging Gmbh Arrangement for adjusting optical components and/or lens groups in variable picture-taking systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006145796A (en) * 2004-11-19 2006-06-08 Nikon Corp Microscope
WO2007079882A1 (en) * 2005-12-21 2007-07-19 Carl Zeiss Microimaging Gmbh Arrangement for adjusting optical components and/or lens groups in variable picture-taking systems

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