JPH0210535U - - Google Patents
Info
- Publication number
- JPH0210535U JPH0210535U JP8916388U JP8916388U JPH0210535U JP H0210535 U JPH0210535 U JP H0210535U JP 8916388 U JP8916388 U JP 8916388U JP 8916388 U JP8916388 U JP 8916388U JP H0210535 U JPH0210535 U JP H0210535U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- moving
- moves
- holding member
- cam
- 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 5
- 238000001514 detection method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
Description
第１図は変倍光学ユニツトの概略構成図、第２
図は本考案に係る変倍光学ユニツトのレンズ位置
検出及び倍率調整機構の概略構成を示す平面図、
第３図はその駆動手段部分の正面図（第２図の
矢視図に相当）、第４図は第３図の―断面図
である。
１……投影レンズ（レンズ）、２……レンズホ
ルダ（レンズ保持部材）、３……ミラーホルダ（
ミラー）、７１……カム、７３……シヤタープレ
ート（レンズ保持部材の移動範囲検知用の検知部
材）。
Figure 1 is a schematic diagram of the variable magnification optical unit;
The figure is a plan view showing a schematic configuration of the lens position detection and magnification adjustment mechanism of the variable magnification optical unit according to the present invention.
FIG. 3 is a front view (corresponding to the arrow direction view in FIG. 2) of the driving means portion, and FIG. 4 is a cross-sectional view taken along the line shown in FIG. 3. 1... Projection lens (lens), 2... Lens holder (lens holding member), 3... Mirror holder (
mirror), 71...cam, 73...shutter plate (detection member for detecting the movement range of the lens holding member).
Claims (1)
たミラーと、を光軸方向に移動して原稿面からレ
ンズ迄の距離及びレンズから投影面迄の距離を変
化させることによつて投影像の拡大率を可変とす
る変倍光学ユニツトに於て、前記レンズを保持す
るレンズ保持部材の移動と同期して移動する移動
部材と、前記ミラーを移動駆動するカムと、前記
レンズ保持部材の移動範囲検知用の検知部材とを
、相互に固定して一体としてこの位置関係を保つ
たままで移動駆動可能とすると共に、前記レンズ
保持部材に対して前記レンズをその移動方向と同
方向に移動調節可能に構成したこと、を特徴とす
る変倍光学ユニツトのレンズ位置検出及び倍率調
整機構。 Projection is performed by moving a lens and a mirror interposed between the lens and the projection surface in the optical axis direction to change the distance from the document surface to the lens and the distance from the lens to the projection surface. A variable magnification optical unit that makes the magnification of an image variable includes a moving member that moves in synchronization with the movement of a lens holding member that holds the lens, a cam that moves and drives the mirror, and a cam that moves and drives the lens holding member. A detection member for detecting a moving range is fixed to each other so that the lens can be moved and driven while maintaining this positional relationship, and the lens is adjusted to move in the same direction as the moving direction of the lens with respect to the lens holding member. 1. A lens position detection and magnification adjustment mechanism for a variable magnification optical unit, characterized in that it is configured to enable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8916388U JPH0210535U (en) | 1988-07-04 | 1988-07-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8916388U JPH0210535U (en) | 1988-07-04 | 1988-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210535U true JPH0210535U (en) | 1990-01-23 |
Family
ID=31313713
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8916388U Pending JPH0210535U (en) | 1988-07-04 | 1988-07-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210535U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5840516A (en) * | 1981-09-03 | 1983-03-09 | Canon Inc | Optical device having variable magnification |
| JPS60159735A (en) * | 1984-01-30 | 1985-08-21 | Ricoh Co Ltd | Safety device of copying machine |
-
1988
- 1988-07-04 JP JP8916388U patent/JPH0210535U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5840516A (en) * | 1981-09-03 | 1983-03-09 | Canon Inc | Optical device having variable magnification |
| JPS60159735A (en) * | 1984-01-30 | 1985-08-21 | Ricoh Co Ltd | Safety device of copying machine |
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