JPS6435516A - Lens barrel for zoom lens - Google Patents
Lens barrel for zoom lensInfo
- Publication number
- JPS6435516A JPS6435516A JP19238187A JP19238187A JPS6435516A JP S6435516 A JPS6435516 A JP S6435516A JP 19238187 A JP19238187 A JP 19238187A JP 19238187 A JP19238187 A JP 19238187A JP S6435516 A JPS6435516 A JP S6435516A
- Authority
- JP
- Japan
- Prior art keywords
- lens group
- focusing lens
- rotary member
- focusing
- lens
- 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
Abstract
PURPOSE:To execute focusing at an arbitrary zooming position in an arbitrary distance between an object and an image, by controlling the movement of other lens group than a focusing lens group by combining a first rotary member and a fixed member, and controlling the movement of the focusing lens group by combining the first rotary member and a second rotary member. CONSTITUTION:In the first rotary member 10, a cam curve groove 41 for a focusing lens group, and cam curve grooves 42, 43 for other moving lens group except the focusing lens group are formed, and rotate at the time of zooming. In a fixed member 20, a guide groove 51 for other moving lens group except the focusing lens group is formed, and always stands still. In the second rotary member 30, a guide groove 52 for the focusing lens group is formed, and rotates at the time of focusing for adjusting a distance. In such a way, in inner focus and rear focus zoom lenses, a moving mechanism of the focusing lens group can be realized by a simple structure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19238187A JPS6435516A (en) | 1987-07-31 | 1987-07-31 | Lens barrel for zoom lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19238187A JPS6435516A (en) | 1987-07-31 | 1987-07-31 | Lens barrel for zoom lens |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435516A true JPS6435516A (en) | 1989-02-06 |
Family
ID=16290350
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19238187A Pending JPS6435516A (en) | 1987-07-31 | 1987-07-31 | Lens barrel for zoom lens |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435516A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03210542A (en) * | 1990-01-16 | 1991-09-13 | Fuji Photo Optical Co Ltd | Zoom lens barrel |
US5337187A (en) * | 1991-11-20 | 1994-08-09 | Nikon Corporation | Zoom lens system |
-
1987
- 1987-07-31 JP JP19238187A patent/JPS6435516A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH03210542A (en) * | 1990-01-16 | 1991-09-13 | Fuji Photo Optical Co Ltd | Zoom lens barrel |
US5337187A (en) * | 1991-11-20 | 1994-08-09 | Nikon Corporation | Zoom lens system |
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