JPS5680011A - Internal reflection reducing device in zoom lens - Google Patents
Internal reflection reducing device in zoom lensInfo
- 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
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
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)
| 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 |
-
1979
- 1979-12-05 JP JP15755279A patent/JPS5680011A/en active Pending
Cited By (4)
| 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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