JPS59194737U - Aperture device for zoom lenses, etc. - Google Patents
Aperture device for zoom lenses, etc.Info
- Publication number
- JPS59194737U JPS59194737U JP8905583U JP8905583U JPS59194737U JP S59194737 U JPS59194737 U JP S59194737U JP 8905583 U JP8905583 U JP 8905583U JP 8905583 U JP8905583 U JP 8905583U JP S59194737 U JPS59194737 U JP S59194737U
- Authority
- JP
- Japan
- Prior art keywords
- aperture
- lens
- movement
- ratio
- aperture device
- 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
- Lenses (AREA)
- Diaphragms For Cameras (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
第１図は、ズームレンズ等における絞り込み部材の回転
量と絞り段数の関係を表わしたグラフ、第２図は、今ま
でのズームレンズ等においてズーミングによって生じる
絞り段数の誤差を表わしたグラフ、第３図は、本考案に
よる実施例の断面図、第４図は、本考案による実施例の
一部の斜視図、第５図は、本考案によるズームレンズ等
において 。
ズーミングによって生じる絞り段数の誤差を表わしたグ
ラフ、第６図と第７図は、上記実施例の作動を説明する
ための図である。
〔主要部分の符号の説明〕、前群レンズ・・・Ｌｌ、後
群レンズ・・・Ｌ２、前群レンズ保持リング・・・１、
操作リング・・・２、摺動リング・・・３、固定リング
・・・８、マクロリング・・・９、後群レンズ保持リン
グ・・・１６、絞り込みリング・・・１１、絞り込み伝
達部材・・・１２、矢車・・・１７、絞り羽根・・・１
８゜勤トFigure 1 is a graph showing the relationship between the amount of rotation of the aperture member and the number of aperture stages in a zoom lens, etc. Figure 2 is a graph showing the error in the number of aperture stages caused by zooming in conventional zoom lenses, etc. 4 is a perspective view of a part of the embodiment according to the present invention, and FIG. 5 is a zoom lens according to the present invention. Graphs showing errors in the number of aperture stages caused by zooming, FIGS. 6 and 7, are diagrams for explaining the operation of the above embodiment. [Explanation of symbols of main parts], Front group lens...Ll, Rear group lens...L2, Front group lens holding ring...1,
Operation ring...2, Sliding ring...3, Fixed ring...8, Macro ring...9, Rear group lens holding ring...16, Aperture ring...11, Aperture transmission member... ...12, Arrow wheel...17, Aperture blade...1
8゜work
Claims (1)
ズ等において、絞り段数と絞り込み部材の移動量との比
率が、絞り込゛みの初段付近に対応する領域では変化し
、それ以後の領域では一定であるごとく基準設定関係に
従って絞りの作動を制御する第１カム手段を前記絞り込
み部材とこれに連動する絞り駆動部材との間に設けると
共に、前記レンズの移動位置にかかわらず前記基準設定
関係にほぼ従って絞りの作動を制御するように、前記レ
ンズの移動に対応して前記比率の変化する領域での前記
比率を非連続的に変化させる第２カム手段を前記絞り込
み部材と前記絞り駆動部材との間に設けたことを特徴と
するズームレンズ等の絞り装置。In zoom lenses where the aperture aperture changes in conjunction with the movement of the lens, the ratio between the number of aperture stages and the amount of movement of the aperture member changes in the region corresponding to the first stage of aperture, and in the subsequent region. A first cam means is provided between the aperture member and an aperture drive member interlocked therewith for controlling the operation of the diaphragm in accordance with the reference setting relationship so as to be constant, and the reference setting relationship is maintained regardless of the moving position of the lens. A second cam means is provided between the aperture member and the aperture drive member for discontinuously changing the ratio in the ratio changing region in response to the movement of the lens so as to control the operation of the aperture substantially accordingly. An aperture device for a zoom lens, etc., characterized in that it is provided between the aperture device and the aperture device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8905583U JPS59194737U (en) | 1983-06-13 | 1983-06-13 | Aperture device for zoom lenses, etc. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8905583U JPS59194737U (en) | 1983-06-13 | 1983-06-13 | Aperture device for zoom lenses, etc. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59194737U true JPS59194737U (en) | 1984-12-25 |
Family
ID=30218953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8905583U Pending JPS59194737U (en) | 1983-06-13 | 1983-06-13 | Aperture device for zoom lenses, etc. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59194737U (en) |
-
1983
- 1983-06-13 JP JP8905583U patent/JPS59194737U/en active Pending
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