JPH0278933U - - Google Patents
Info
- Publication number
- JPH0278933U JPH0278933U JP15994288U JP15994288U JPH0278933U JP H0278933 U JPH0278933 U JP H0278933U JP 15994288 U JP15994288 U JP 15994288U JP 15994288 U JP15994288 U JP 15994288U JP H0278933 U JPH0278933 U JP H0278933U
- Authority
- JP
- Japan
- Prior art keywords
- field light
- exposure
- area
- blade
- shutter blade
- 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
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Exposure Control For Cameras (AREA)
- Shutters For Cameras (AREA)
Description
第１図は本考案の１実施例に係るプログラムシ
ヤツタの平面図、第２図は本考案の実施例を示す
回路図、第３図は本考案のタイムチヤート。
２・３…シヤツタ羽根、Ｓ１・Ｓ２…スリツト
、６…モータ、７…フオトインタラプタ、７ａ…
発光ダイオード、７ｂ…フオトトランジスタ、１
２…フリツプフロツプ、１３…アンドゲート、１
４…発振器、１５…カウンタ、１６…フオトダイ
オード、１７…オペアンプ、１８…ログダイオー
ド、１９…抵抗、２０…トランジスタ、２１…キ
ヤパシタ、２２…コンパレータ、３９・４０・４
１・４２…定電流源、４７・４８・４９・５０…
トランジスタ、５１…デコーダ、ＡＰ…アパーチ
ユア。
FIG. 1 is a plan view of a program shutter according to an embodiment of the present invention, FIG. 2 is a circuit diagram showing an embodiment of the present invention, and FIG. 3 is a time chart of the present invention. 2, 3...Shutter blade, S1 , S2 ...Slit, 6...Motor, 7...Photo interrupter, 7a...
Light emitting diode, 7b...Phototransistor, 1
2...Flip-flop, 13...And gate, 1
4... Oscillator, 15... Counter, 16... Photo diode, 17... Operational amplifier, 18... Log diode, 19... Resistor, 20... Transistor, 21... Capacitor, 22... Comparator, 39.40.4
1, 42... constant current source, 47, 48, 49, 50...
Transistor, 51...decoder, AP...aperture your.
Claims (1)
往復動作が可能で、往動時には前記有効開口領域
内では露出用アパーチユアの開口面積を時間経過
とともに連続的に増大させ、復動時には前記有効
開口領域内では露出用アパーチユアの開口面積を
時間経過とともに連続的に減少させる様にしたシ
ヤツタ羽根と、 被写界光が入射する受光部を有し、該受光部に
入射した被写界光に対応して流れる光電流の積算
値が所定の値に達したタイミングで露出終了信号
を発生する被写界光積算手段とを具備し、 該被写界光積算手段が発生する前記露出終了信
号に応答して前記シヤツタ羽根を復動させる様に
した露出制御装置において、 前記シヤツタ羽根の往動時の前記有効開口領域
に達する以前の走行領域内における走行速度を検
出する羽根速度検出手段を具備し、 該羽根速度検出手段によつて検出された前記走
行速度に対応して前記被写界光積算手段に流れる
光電流のゲインを制御する様にしたことを特徴と
する露出制御装置。[Claims for Utility Model Registration] Reciprocating movement is possible within a predetermined travel range that includes the effective aperture area, and during forward movement, the opening area of the exposure aperture is continuously increased over time within the effective aperture area. and a shutter blade configured to continuously reduce the opening area of the exposure aperture over time within the effective aperture area during the return movement, and a light receiving section into which field light enters, and a field light integrating means for generating an exposure end signal at a timing when an integrated value of photocurrent flowing in response to incident field light reaches a predetermined value, the field light integrating means In an exposure control device configured to move the shutter blade backward in response to the generated exposure end signal, a traveling speed within the travel area before reaching the effective opening area during the forward movement of the shutter blade is detected. It is characterized by comprising a blade speed detecting means, and controlling the gain of the photocurrent flowing through the field light integrating means in accordance with the traveling speed detected by the blade speed detecting means. Exposure control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15994288U JPH0278933U (en) | 1988-12-07 | 1988-12-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15994288U JPH0278933U (en) | 1988-12-07 | 1988-12-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0278933U true JPH0278933U (en) | 1990-06-18 |
Family
ID=31441592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15994288U Pending JPH0278933U (en) | 1988-12-07 | 1988-12-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0278933U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149935A (en) * | 1984-12-24 | 1986-07-08 | Copal Co Ltd | Exposure controller |
| JPS62178935A (en) * | 1986-02-03 | 1987-08-06 | Canon Inc | automatic exposure control device |
-
1988
- 1988-12-07 JP JP15994288U patent/JPH0278933U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61149935A (en) * | 1984-12-24 | 1986-07-08 | Copal Co Ltd | Exposure controller |
| JPS62178935A (en) * | 1986-02-03 | 1987-08-06 | Canon Inc | automatic exposure control device |
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