JPH023537U - - Google Patents
Info
- Publication number
- JPH023537U JPH023537U JP8281088U JP8281088U JPH023537U JP H023537 U JPH023537 U JP H023537U JP 8281088 U JP8281088 U JP 8281088U JP 8281088 U JP8281088 U JP 8281088U JP H023537 U JPH023537 U JP H023537U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- optical unit
- movement
- operating lever
- variable magnification
- 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
- 230000003287 optical effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
- Control Of Exposure In Printing And Copying (AREA)
Description
第1図は本考案に係る変倍光学ユニツトに於る
光量補正機構の概略構成を示す平面図、第2図は
その主要部の分解斜視図、第3図は絞り操作レバ
ー部の拡大斜視図である。
1……投影レンズ(レンズ)、3……カムプレ
ート、5……偏心ブツシユ、11……絞り操作レ
バー、31……カム溝。
Fig. 1 is a plan view showing the schematic configuration of the light amount correction mechanism in the variable magnification optical unit according to the present invention, Fig. 2 is an exploded perspective view of its main parts, and Fig. 3 is an enlarged perspective view of the aperture operating lever section. It is. 1... Projection lens (lens), 3... Cam plate, 5... Eccentric bush, 11... Aperture operation lever, 31... Cam groove.
Claims (1)
影像の拡大・縮小を行なう変倍光学ユニツトに於
て、前記変倍光学ユニツトのシヤーシに、前記レ
ンズの移動方向と直交する方向に所定の関係で変
位しつつ該レンズの移動方向に連続するカム溝を
形成したカムプレートを、前記レンズの移動方向
と平行する方向に移動調整可能として固定すると
共に、前記カムプレートのカム溝に、前記レンズ
の外周壁外側に突出した絞り操作レバーを、該操
作レバーに摺動回転調節可能に外挿固定された偏
心ブツシユを介して摺動移動可能に嵌合して構成
したこと、を特徴とする変倍光学ユニツトに於る
光量補正機構。 In a variable magnification optical unit that enlarges or reduces an image projected by the lens by moving the lens, the chassis of the variable magnification optical unit is displaced in a predetermined relationship in a direction orthogonal to the direction of movement of the lens. A cam plate having a cam groove continuous in the direction of movement of the lens is fixed so as to be movable and adjustable in a direction parallel to the direction of movement of the lens, and the cam groove of the cam plate is provided with a cam groove on the outside of the outer peripheral wall of the lens. A variable magnification optical unit characterized in that an aperture operating lever protruding from the diaphragm is slidably fitted to the operating lever through an eccentric bushing which is inserted and fixed to the operating lever so as to be slidable and rotationally adjustable. Light amount correction mechanism.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8281088U JPH023537U (en) | 1988-06-21 | 1988-06-21 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8281088U JPH023537U (en) | 1988-06-21 | 1988-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH023537U true JPH023537U (en) | 1990-01-10 |
Family
ID=31307551
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8281088U Pending JPH023537U (en) | 1988-06-21 | 1988-06-21 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH023537U (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58219514A (en) * | 1982-06-15 | 1983-12-21 | Canon Inc | Copying device having function changing magnification |
JPS60140333A (en) * | 1983-12-28 | 1985-07-25 | Ricoh Co Ltd | Image forming device of variable power copying machine |
JPS62201409A (en) * | 1986-02-28 | 1987-09-05 | Canon Inc | Lens assembly |
-
1988
- 1988-06-21 JP JP8281088U patent/JPH023537U/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58219514A (en) * | 1982-06-15 | 1983-12-21 | Canon Inc | Copying device having function changing magnification |
JPS60140333A (en) * | 1983-12-28 | 1985-07-25 | Ricoh Co Ltd | Image forming device of variable power copying machine |
JPS62201409A (en) * | 1986-02-28 | 1987-09-05 | Canon Inc | Lens assembly |