JPS6146529U - Auto iris circuit - Google Patents
Auto iris circuitInfo
- Publication number
- JPS6146529U JPS6146529U JP13046684U JP13046684U JPS6146529U JP S6146529 U JPS6146529 U JP S6146529U JP 13046684 U JP13046684 U JP 13046684U JP 13046684 U JP13046684 U JP 13046684U JP S6146529 U JPS6146529 U JP S6146529U
- Authority
- JP
- Japan
- Prior art keywords
- auto iris
- iris circuit
- iris
- braking
- circuit
- 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
- 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) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【図面の簡単な説明】
第１図は本考案のオートアイリスア回路の一実施例を示
す構成図、第２図は第１図に示したスイツチ駆動部の詳
細例を示した概略図、第３図は従来のオートアイリス回
路の一例を示した構成図である。
１・・・演算増幅器、３・・・駆動コイル、５・・・ロ
ツド、６・・・アイリス羽根、７・・・制動コイル、９
，１０・・・抵抗。[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a configuration diagram showing an embodiment of the auto iris circuit of the present invention, FIG. 2 is a schematic diagram showing a detailed example of the switch drive section shown in FIG. 1, and FIG. The figure is a configuration diagram showing an example of a conventional auto iris circuit. DESCRIPTION OF SYMBOLS 1... Operational amplifier, 3... Drive coil, 5... Rod, 6... Iris vane, 7... Braking coil, 9
,10...Resistance.
Claims (1)
圧をフ不一ドバックすることにより、アイリス羽根の駆
動時における制動力を得るオートアイリス回路において
、前記逆起電圧を電圧降下させて適切な値とする制動抵
抗の抵抗値を、前記アイリス羽根の開口面積に応じて変
化させることを特徴とするオートアイリス回路。In an auto iris circuit that obtains braking force when driving the iris blade by multiplying the back electromotive force generated in the braking coil into the current flowing through the drive coil, the back electromotive voltage is lowered to an appropriate value. An auto iris circuit characterized in that a resistance value of a braking resistor is changed according to an opening area of the iris blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13046684U JPS6146529U (en) | 1984-08-30 | 1984-08-30 | Auto iris circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13046684U JPS6146529U (en) | 1984-08-30 | 1984-08-30 | Auto iris circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6146529U true JPS6146529U (en) | 1986-03-28 |
Family
ID=30689072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13046684U Pending JPS6146529U (en) | 1984-08-30 | 1984-08-30 | Auto iris circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6146529U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63204237A (en) * | 1987-02-19 | 1988-08-23 | Sony Corp | Automatic iris circuit for image pickup device |
-
1984
- 1984-08-30 JP JP13046684U patent/JPS6146529U/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63204237A (en) * | 1987-02-19 | 1988-08-23 | Sony Corp | Automatic iris circuit for image pickup device |
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