JPS5680011A - Internal reflection reducing device in zoom lens - Google Patents

Internal reflection reducing device in zoom lens

Info

Publication number
JPS5680011A
JPS5680011A JP15755279A JP15755279A JPS5680011A JP S5680011 A JPS5680011 A JP S5680011A JP 15755279 A JP15755279 A JP 15755279A JP 15755279 A JP15755279 A JP 15755279A JP S5680011 A JPS5680011 A JP S5680011A
Authority
JP
Japan
Prior art keywords
lens
leg parts
movable
reducing device
reflection reducing
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
JP15755279A
Other languages
Japanese (ja)
Inventor
Yukio Fujii
Saburo Hokari
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP15755279A priority Critical patent/JPS5680011A/en
Publication of JPS5680011A publication Critical patent/JPS5680011A/en
Pending legal-status Critical Current

Links

Landscapes

  • Lens Barrels (AREA)

Abstract

PURPOSE: To make the construction of a reflection reducing device simple by providing a variable torus-shaped shielding wall provided with leg parts extending beyond the lens frame of a variable magnification movable lens on the inside surface of the lens-barrel between the focusing lens and variable magnification movable lens of a zoom lens, and interlocking said leg parts and a movable lens for correction by way of friction engagement.
CONSTITUTION: In the zoom lens having a variable magnification movable lens 4 and a correcrion movable lens 5 between a focusing lens 1 and a stationary lens 3, a reflection reducing device provided with a torus-shaped shielding wall 11 movable in the optical axis direction and leg parts 12 is provided between the lenses 1 and 4. The leg parts 12 which are divided to, for example, 3 pieces, fits slidably into the three grooves 4c provided to the lens frame 4a of the lens 4. Further, the leg parts 12 extending backward fits slidably to the protruding pieces 5b of the lens frame 5a of the lens 5a; in addition, the cut grooves 14 of the legs 12 make friction engagement with the projecting parts 13 of rubber or the like. The wall 11 moves cooperatively with the lens 5 and in the case of macrophotography, it stops by being supported by the lens 4. Thereby, the shielding device is made simple.
COPYRIGHT: (C)1981,JPO&Japio
JP15755279A 1979-12-05 1979-12-05 Internal reflection reducing device in zoom lens Pending JPS5680011A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15755279A JPS5680011A (en) 1979-12-05 1979-12-05 Internal reflection reducing device in zoom lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15755279A JPS5680011A (en) 1979-12-05 1979-12-05 Internal reflection reducing device in zoom lens

Publications (1)

Publication Number Publication Date
JPS5680011A true JPS5680011A (en) 1981-07-01

Family

ID=15652168

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15755279A Pending JPS5680011A (en) 1979-12-05 1979-12-05 Internal reflection reducing device in zoom lens

Country Status (1)

Country Link
JP (1) JPS5680011A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558927A (en) * 1982-08-21 1985-12-17 Nippon Kogaku K.K. Zoom lens assembly
US5313329A (en) * 1987-08-21 1994-05-17 Asahi Kogaku Kogyo Kabushiki Kaisha Lens hood assembly for zoom lens
US5392160A (en) * 1992-01-08 1995-02-21 Olympus Optical Co., Ltd. Lens barrel having a flare diaphragm mechanism
JP2006215394A (en) * 2005-02-04 2006-08-17 Fujinon Corp Lens device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4558927A (en) * 1982-08-21 1985-12-17 Nippon Kogaku K.K. Zoom lens assembly
US5313329A (en) * 1987-08-21 1994-05-17 Asahi Kogaku Kogyo Kabushiki Kaisha Lens hood assembly for zoom lens
US5392160A (en) * 1992-01-08 1995-02-21 Olympus Optical Co., Ltd. Lens barrel having a flare diaphragm mechanism
JP2006215394A (en) * 2005-02-04 2006-08-17 Fujinon Corp Lens device

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