JPH0210534U - - Google Patents
Info
- Publication number
- JPH0210534U JPH0210534U JP8916288U JP8916288U JPH0210534U JP H0210534 U JPH0210534 U JP H0210534U JP 8916288 U JP8916288 U JP 8916288U JP 8916288 U JP8916288 U JP 8916288U JP H0210534 U JPH0210534 U JP H0210534U
- Authority
- JP
- Japan
- Prior art keywords
- lens
- stroke
- movable side
- detected
- movement
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 2
Landscapes
- Exposure Or Original Feeding In Electrophotography (AREA)
- Variable Magnification In Projection-Type Copying Machines (AREA)
Description
第１図は本考案に係る変倍光学装置の原点送り
機構の概略構成を示す平面図、第２図はその原点
時に於る部分平面図である。
１……投影レンズ（レンズ）、２……レンズホ
ルダ（可動側）、３……シヤタープレート（被検
知部材）、５……フオトインタラプタ（検知手段
）、ｌ……被検知部材の移動ストローク方向の長
さ、ｘ……可動側の移動ストロークの原点から移
動ストロークと逆方向に移動可能な長さ。
FIG. 1 is a plan view showing a schematic configuration of an origin point sending mechanism of a variable magnification optical device according to the present invention, and FIG. 2 is a partial plan view of the origin point position. 1... Projection lens (lens), 2... Lens holder (movable side), 3... Shutter plate (detected member), 5... Photo interrupter (detection means), l... Movement stroke of detected member Length in direction, x: length that allows movement from the origin of the movement stroke on the movable side in the direction opposite to the movement stroke.
Claims (1)
影像の拡大・縮小を行なう変倍光学装置であつて
、前記レンズの移動により相対変位する可動側と
固定側とに、検知手段と該検知手段により検知さ
れる被検知部材を相互択一的に配置してレンズの
移動ストロークの一方端で前記検知手段が前記被
検知部材を検知した位置を前記移動ストロークの
原点とするものに於て、前記被検知部材の前記移
動ストローク方向の長さを、前記可動側の移動ス
トロークの原点から該移動ストロークと逆方向に
移動可能な長さより長く構成したこと、を特徴と
する変倍光学装置の原点送り機構。 A variable magnification optical device that magnifies or reduces an image projected by the lens by moving the lens, and a movable side and a fixed side, which are relatively displaced by the movement of the lens, are provided with a detection means and a sensor that is detected by the detection means. The detected members are arranged alternatively to each other, and the position where the detecting means detects the detected member at one end of the moving stroke of the lens is set as the origin of the moving stroke, wherein the detected member A length in the movement stroke direction of the movable side is configured to be longer than a length by which the movable side can move from the origin of the movement stroke in a direction opposite to the movement stroke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8916288U JPH0210534U (en) | 1988-07-04 | 1988-07-04 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8916288U JPH0210534U (en) | 1988-07-04 | 1988-07-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0210534U true JPH0210534U (en) | 1990-01-23 |
Family
ID=31313712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8916288U Pending JPH0210534U (en) | 1988-07-04 | 1988-07-04 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0210534U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116342A (en) * | 1984-11-12 | 1986-06-03 | Sharp Corp | Lens position control method |
-
1988
- 1988-07-04 JP JP8916288U patent/JPH0210534U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61116342A (en) * | 1984-11-12 | 1986-06-03 | Sharp Corp | Lens position control method |