JPS629890B2 - - Google Patents
Info
- Publication number
- JPS629890B2 JPS629890B2 JP49071819A JP7181974A JPS629890B2 JP S629890 B2 JPS629890 B2 JP S629890B2 JP 49071819 A JP49071819 A JP 49071819A JP 7181974 A JP7181974 A JP 7181974A JP S629890 B2 JPS629890 B2 JP S629890B2
- Authority
- JP
- Japan
- Prior art keywords
- flash
- light
- circuit
- capacitor
- receiving 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.)
- Expired
Links
- 239000003990 capacitor Substances 0.000 claims description 42
- 238000004146 energy storage Methods 0.000 claims description 9
- 230000000977 initiatory effect Effects 0.000 claims 1
- 230000000087 stabilizing effect Effects 0.000 claims 1
- 238000004804 winding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 241001417501 Lobotidae Species 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
- H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
- H05B41/325—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation by measuring the incident light
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B15/00—Special procedures for taking photographs; Apparatus therefor
- G03B15/02—Illuminating scene
- G03B15/03—Combinations of cameras with lighting apparatus; Flash units
- G03B15/05—Combinations of cameras with electronic flash apparatus; Electronic flash units
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/30—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp
- H05B41/32—Circuit arrangements in which the lamp is fed by pulses, e.g. flash lamp for single flash operation
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2215/00—Special procedures for taking photographs; Apparatus therefor
- G03B2215/05—Combinations of cameras with electronic flash units
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Stroboscope Apparatuses (AREA)
- Discharge-Lamp Control Circuits And Pulse- Feed Circuits (AREA)
- Exposure Control For Cameras (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
- Switches Operated By Changes In Physical Conditions (AREA)
Description
【発明の詳細な説明】
この発明は、せん光を被写体に照射し、該被写
体からの反射光を受光し、受光量が所定値に達し
たときに上記せん光管の発光を停止させる受光回
路を具えた電子式自動せん光装置に関するもの
で、特にせん光管にせん光発光用トリガ信号が印
加されるときにのみ上記受光回路に動作用電源を
結合するようにして、上記受光回路が上記被写体
からの反射光以外の周囲光に応動することがない
ようにした自動せん光装置に関するものである。Detailed Description of the Invention The present invention provides a light receiving circuit that irradiates a subject with flashlight, receives reflected light from the subject, and stops the light emission of the flashlight tube when the amount of received light reaches a predetermined value. The invention relates to an electronic automatic flashing device comprising: an electronic automatic flashing device, in which an operating power source is coupled to the light receiving circuit only when a trigger signal for flashlight emission is applied to the flash tube; This invention relates to an automatic flashing device that does not react to ambient light other than light reflected from a subject.
被写体からの反射光を検知し積分して、その積
分値が所定値に達したときにせん光管のせん光発
光を打ち切るように動作する受光回路を具えた自
動せん光装置は既に知られている。しかしなが
ら、従来の大部分の自動せん光装置では、受光回
路はせん光管によるせん光発光の有無には関係な
く動作可能状態にあるため、この受光回路が周囲
光あるいは他のせん光装置のせん光等に応動し
て、例えばせん光管の両端間に短絡回路を作り出
してエネルギ蓄積キヤパシタに蓄積されたエネル
ギを全部放電させてしまつたり、あるいはせん光
発光を所定時期よりも早い時期に停止させてしま
うという欠点があつた。 Automatic flashing devices are already known which are equipped with a light receiving circuit that detects and integrates the reflected light from a subject, and when the integrated value reaches a predetermined value, stops the flashlight emission of the flashlight tube. There is. However, in most conventional automatic flashers, the receiver circuit remains operational regardless of whether or not the flash tube emits a flash; In response to light, for example, a short circuit can be created between the ends of the flash tube to discharge all of the energy stored in the energy storage capacitor, or the flash light emission can be stopped earlier than a predetermined time. It has the disadvantage of letting you do it.
せん光発光のあつたときにのみ受光回路に動作
電圧を与えてこれを動作可能状態とする形式の自
動せん光装置も知られている。しかしながら、従
来のこの種の自動せん光装置では、せん光管によ
るせん光発光があつたときにはじめて受光回路が
動作可能状態となるため、該受光回路は発光初期
のせん光による反射光には応動することができ
ず、反射光量を正確に検知することができない欠
点があつた。 An automatic flashing device is also known in which an operating voltage is applied to the light receiving circuit to enable it to operate only when flashing occurs. However, in conventional automatic flashing devices of this type, the light receiving circuit becomes operational only when the flashlight is emitted by the flashlight tube. It had the disadvantage that it was not possible to respond and accurately detect the amount of reflected light.
この発明は、受光回路をせん光発光の直前、遅
くともせん光発光と同時に動作可能状態とし、こ
れによつて上述のような従来の自動せん光装置の
欠点を悉く解消することのできる自動せん光装置
を提供することを目的とする。 The present invention provides an automatic flashing device that enables a light receiving circuit to operate immediately before flashing light is emitted, or at the latest at the same time as flashing light is emitted, thereby eliminating all of the drawbacks of the conventional automatic flashing device as described above. The purpose is to provide equipment.
以下、図示の実施例によつてこれを説明する。 This will be explained below with reference to illustrated embodiments.
図示の自動せん光装置は、キヤパシタ８とサイ
リスタ１０とからなるせん光制限回路と、このせ
ん光制限回路を制御するための制御回路４３２
と、せん光トリガ回路４３３と、抵抗器４０とを
具備している。 The illustrated automatic flashing device includes a flashing limiting circuit including a capacitor 8 and a thyristor 10, and a control circuit 432 for controlling this flashing limiting circuit.
, a flash trigger circuit 433, and a resistor 40.
上記の装置はさらに、線２を経由して印加され
る電圧によつて充電されるエネルギ蓄積キヤパシ
タ１と、せん光管３と、このせん光管をトリガす
るためのトリガ回路とを具備している。トリガ回
路は、せん光管３の制御電極にその２次巻線が接
続されているトリガ変成器４と、トリガ・キヤパ
シタ５と、制御サイリスタ６と、誘導コイル７と
を含んでいる。 The device further comprises an energy storage capacitor 1 charged by a voltage applied via line 2, a flash tube 3 and a trigger circuit for triggering the flash tube. There is. The trigger circuit includes a trigger transformer 4 whose secondary winding is connected to the control electrode of the flash tube 3, a trigger capacitor 5, a control thyristor 6 and an induction coil 7.
せん光制限回路のキヤパシタ８は、電圧源から
線９を経て充電される。制御回路４３２は、１つ
の主電極がサイリスタ１０のゲート電極に接続さ
れたユニジヤンクシヨン・トランジスタ２０１
と、サイリスタ１０のゲート電極５１と陰極との
間に接続された抵抗器２０２と、トランジスタ２
０１のゲート電極とサイリスタ１０のカソードと
の間に接続されたキヤパシタ２０３と、エミツタ
がトランジスタ２０１のゲート電極に接続されコ
レクタがトランジスタ２０１の他の主電極に接続
されたホトトランジスタ２０４と、１端がトラン
ジスタ２０４のコレクタに接続された抵抗器２０
５と、キヤパシタ２０３とトランジスタ２０４の
コレクタ・エミツタ電路との直列接続の両端間に
接続されたツエナー・ダイオード２０６と、コレ
クタが抵抗器２０５の他端に接続されたトランジ
スタ２０７と、トランジスタ２０７のエミツタと
サイリスタ１０の陰極との間に接続された受光回
路の電源用電解キヤパシタ２０８と、１端がトラ
ンジスタ２０７のベースに接続された抵抗器２０
９と、アノードが抵抗器２０９の他端に接続され
陰極がトランジスタ２０７のエミツタに接続され
たダイオード２１０とを具備している。 Capacitor 8 of the flash limiting circuit is charged via line 9 from a voltage source. The control circuit 432 includes a unidirectional transistor 201 whose one main electrode is connected to the gate electrode of the thyristor 10.
, a resistor 202 connected between the gate electrode 51 and the cathode of the thyristor 10, and a transistor 2.
a capacitor 203 connected between the gate electrode of thyristor 10 and the cathode of thyristor 10; a phototransistor 204 whose emitter is connected to the gate electrode of transistor 201 and whose collector is connected to the other main electrode of transistor 201; is connected to the collector of transistor 204.
5, a Zener diode 206 connected across the series connection between the capacitor 203 and the collector-emitter circuit of the transistor 204, a transistor 207 whose collector is connected to the other end of the resistor 205, and the emitter of the transistor 207. and the cathode of the thyristor 10, an electrolytic capacitor 208 for power supply of the light receiving circuit, and a resistor 20, one end of which is connected to the base of the transistor 207.
9, and a diode 210 whose anode is connected to the other end of the resistor 209 and whose cathode is connected to the emitter of the transistor 207.
装置のトリガ回路は、カメラ同期接点３０１
と、１端が接点３０１の１方の側に接続された抵
抗器３０３と、抵抗器３０３の他端と接点３０１
の他方の側との間に接続されたキヤパシタ３０８
と、１端が抵抗器３０３と３０８との接合点に接
続され、他端がキヤパシタ３０８の他端とインダ
クタ７の１端に接続された抵抗器３０５と、ゲー
ト電極が抵抗器３０３と３０５との接合点へ接続
され１つの主電極が接点３０１の１方の側へ接続
されたユニジヤンクシヨントランジスタ３０７
と、１端が接点３０１の１方の側へ接続された抵
抗器３０６と、１端がトランジスタ３０７の他方
の主電極とサイリスタ６のゲート電極とに接続さ
れかつ他端が抵抗器３０５の他端に接続された抵
抗器３０４と、抵抗器３０６の他端とせん光管３
の１つの主電極との間に接続された抵抗器３０２
とを含む。 The trigger circuit of the device is the camera synchronization contact 301
, a resistor 303 whose one end is connected to one side of the contact 301, and the other end of the resistor 303 and the contact 301.
a capacitor 308 connected between the other side of the
and a resistor 305 whose one end is connected to the junction of the resistors 303 and 308 and whose other end is connected to the other end of the capacitor 308 and one end of the inductor 7, and whose gate electrodes are connected to the junction of the resistors 303 and 305. a unijunction transistor 307 with one main electrode connected to one side of the contact 301;
, a resistor 306 whose one end is connected to one side of the contact 301, and whose one end is connected to the other main electrode of the transistor 307 and the gate electrode of the thyristor 6, and whose other end is connected to the other side of the resistor 305. A resistor 304 is connected to one end of the resistor 304, and a resistor 306 is connected to the other end of the flash tube 3.
A resistor 302 connected between one main electrode of
including.
さらに、トリガキヤパシタ５が接点３０１の他
方の側と変成器４の１次巻線との間に接続され、
変成器４の２次巻線が管３の１つの主電極とせん
光管３のトリガ電極との間に接続され、せん光管
３の１つの主電極がサイリスタ６のアノードに接
続され、せん光管３の他の主電極がキヤパシタ１
と８との接合点へ接続される。また、インダクタ
ンス７がキヤパシタ１とサイリスタ６の陰極との
間に直列に接続される。インダクタンス７とサイ
リスタ６および１０の陰極との間の接続は、回路
の共通接続を形成し、この共通接続に対して図示
のように他の部品も接続される。 Furthermore, a trigger capacitor 5 is connected between the other side of the contact 301 and the primary winding of the transformer 4;
A secondary winding of the transformer 4 is connected between one main electrode of the tube 3 and a trigger electrode of the flash tube 3, one main electrode of the flash tube 3 is connected to the anode of the thyristor 6, and the The other main electrode of the light tube 3 is the capacitor 1
and 8. Further, an inductance 7 is connected in series between the capacitor 1 and the cathode of the thyristor 6. The connection between the inductance 7 and the cathodes of the thyristors 6 and 10 forms the common connection of the circuit, to which the other components are also connected as shown.
上記の装置の動作は次の通りである。同期接点
３０１を閉じる前は、サイリスタ６は遮断状態に
あり、またダイオード２１０の陽極は比較的高い
電圧に保たれているから、該ダイオード２１０は
導通状態にあり、トランジスタ２０７は遮断状態
にある。このとき、キヤパシタ１および８はそれ
ぞれ充電線２および９を経て供給される電源電圧
によつて充電される。また制御回路４３２のキヤ
パシタ２０８は抵抗器４０，３０２および導通状
態にあるダイオード２１０を経てあるレベルにま
で充電されている。同様にトリガ・キヤパシタ５
も抵抗器４０、トリガ変成器４を経て充電されて
いる。さらに、キヤパシタ３０８も抵抗器３０５
の両端間に現われる電圧によつてあるレベルまで
充電されている。この抵抗器３０５は、抵抗器３
０３，３０６，３０２および４０とともにキヤパ
シタ１の両端間で分圧器を形成する。 The operation of the above device is as follows. Before closing the synchronizing contact 301, the thyristor 6 is in the cut-off state and the anode of the diode 210 is kept at a relatively high voltage, so that the diode 210 is in the conducting state and the transistor 207 is in the cut-off state. At this time, capacitors 1 and 8 are charged by the power supply voltage supplied via charging lines 2 and 9, respectively. Capacitor 208 of control circuit 432 is also charged to a level via resistors 40, 302 and diode 210 which is conducting. Similarly, trigger capacitor 5
is also charged via resistor 40 and trigger transformer 4. Furthermore, the capacitor 308 is also connected to the resistor 305.
is charged to a certain level by the voltage appearing across it. This resistor 305 is the resistor 3
03, 306, 302 and 40 form a voltage divider across the capacitor 1.
せん光を発生させるために、通常カメラの中に
内蔵されている同期接点３０１を閉じると、トラ
ンジスタ３０７を経てサイリスタ６のゲート５０
へキヤパシタ３０８の電荷の放電が行なわれて、
抵抗器３０４の両端間にトリガ電圧が発生し、サ
イリスタ６が導通状態へトリガされる。また、接
点３０１を閉じることにより、ダイオード２１０
の陽極電位は低下するから、該ダイオード２１０
は遮断すると共にトランジスタ２０７のベースに
負バイアスが与えられて該トランジスタ２０７を
導通させる。これによつてキヤパシタ２０８はト
ランジスタ２０７およびツエナー・ダイオード２
０６を経て放電し、該ツエナー・ダイオード２０
６の両端間に所定の電圧を発生させる。この電圧
はホトトランジスタ２０４を含む受光回路の動作
電圧として働く。これによつて該受光回路は動作
可能状態となる。 In order to generate flashlight, when the synchronizing contact 301, which is usually built in the camera, is closed, the gate 50 of the thyristor 6 passes through the transistor 307.
The charge of the capacitor 308 is discharged,
A trigger voltage is generated across resistor 304 and thyristor 6 is triggered into conduction. Also, by closing the contact 301, the diode 210
Since the anode potential of the diode 210 decreases, the anode potential of the diode 210 decreases.
is cut off, and a negative bias is applied to the base of transistor 207, making transistor 207 conductive. This causes capacitor 208 to connect to transistor 207 and Zener diode 2.
06, the Zener diode 20
A predetermined voltage is generated between both ends of 6. This voltage serves as an operating voltage for the light receiving circuit including the phototransistor 204. This enables the light receiving circuit to operate.
上記サイリスタ６の導通によつてトリガ・キヤ
パシタ５はトリガ変成器４およびサイリスタ６を
経て放電し、せん光管３にトリガ信号が供給され
る。これによつてキヤパシタ１に蓄積された電荷
はせん光管３、サイリスタ６および誘導コイル７
を経て放電し、せん光管３はせん光を発する。 Due to the conduction of the thyristor 6, the trigger capacitor 5 is discharged through the trigger transformer 4 and the thyristor 6, and a trigger signal is supplied to the flash tube 3. As a result, the charge accumulated in the capacitor 1 is transferred to the flash tube 3, the thyristor 6 and the induction coil 7.
The flash tube 3 emits flash light.
せん光管３によつて作り出された光は、被写体
からホトトランジスタ２０４へ向けて反射され
る。ツエナー・ダイオード２０６によつて発生さ
れた電圧は、ホトトランジスタ２０４に入射する
光輻射の強度に比例する電流をホトトランジスタ
を経て流通させる。この電流はキヤパシタ２０３
を充電し、キヤパシタ２０３の両端間に発生して
トランジスタ２０１のゲートへ印加される電圧が
所定の値に達すると、トランジスタ２０１が導通
してサイリスタ１０を導通状態へトリガするのに
充分な電圧を抵抗器２０２の両端間に発生させ
る。その結果、キヤパシタ８がサイリスタ１０を
経て放電し、この放電により管３およびサイリス
タ６を経て流れる電流とは反対方向の電流が作り
出される。これによつてサイリスタ６が阻止さ
れ、キヤパシタ１の管３を経由して行われる放電
が打ち切られる。 The light produced by the flash tube 3 is reflected from the subject towards the phototransistor 204. The voltage generated by the Zener diode 206 causes a current to flow through the phototransistor 204 that is proportional to the intensity of the optical radiation incident on the phototransistor 204 . This current flows through the capacitor 203
When the voltage developed across the capacitor 203 and applied to the gate of the transistor 201 reaches a predetermined value, the transistor 201 conducts and generates a voltage sufficient to trigger the thyristor 10 into conduction. generated across resistor 202. As a result, capacitor 8 discharges through thyristor 10 , which discharge creates a current in the opposite direction to the current flowing through tube 3 and thyristor 6 . As a result, the thyristor 6 is blocked and the discharge taking place via the tube 3 of the capacitor 1 is terminated.
この発明による自動せん光装置は、同期接点３
０１が閉成されたときのみホトトランジスタ２０
４を含む受光回路の動作電圧が生成される。しか
もこの受光回路の動作電圧は前述に説明からも明
らかなように、せん光管３のせん光発光の直前、
遅くともせん光発光と同時に生成される。したが
つて、受光回路は当該せん光装置がせん光を発し
たときのみ動作するから、上記せん光による反射
光によつてのみキヤパシタ２０３が充電され、誤
動作がなく光量を正確に制御することができる。 The automatic flashing device according to this invention has three synchronizing contacts.
Phototransistor 20 only when 01 is closed
The operating voltage of the light receiving circuit including 4 is generated. Moreover, as is clear from the above explanation, the operating voltage of this light receiving circuit is set immediately before the flashlight emission of the flashlight tube 3.
It is generated at the latest at the same time as the flash light is emitted. Therefore, since the light receiving circuit operates only when the flashing device emits flashlight, the capacitor 203 is charged only by the reflected light from the flashlight, and the amount of light can be accurately controlled without malfunction. can.
更にこの発明の装置は、受光回路用の電源とし
てキヤパシタ２０８を利用しているため、受光回
路の消費電力は該キヤパシタ２０８の放電々流に
よるものゝみであり、すなわち第２スイツチであ
るトランジスタ２０７が導通してもエネルギ蓄積
キヤパシタ１から受光回路または受光回路電源回
路に不要な放電々流が流れることは無いから、キ
ヤパシタ１の充電々荷の浪費防止と再動作までの
期間の短縮との効果を得ることができる。 Furthermore, since the device of the present invention uses the capacitor 208 as a power source for the light receiving circuit, the power consumption of the light receiving circuit is due to the discharge current of the capacitor 208, that is, the transistor 207 which is the second switch. Since no unnecessary discharge current flows from the energy storage capacitor 1 to the light-receiving circuit or the light-receiving circuit power supply circuit even if the energy storage capacitor 1 becomes conductive, this has the effect of preventing wastage of the charge of the capacitor 1 and shortening the period until it restarts. can be obtained.
図はこの発明による自動せん光装置の一実施例
の回路図である。
１……エネルギ蓄積キヤパシタ、３……せん光
管、８……キヤパシタ、１０……電子スイツチ、
２０４……ホトトランジスタ、２０７……トラン
ジスタ（スイツチ）、２０８……受光回路電源用
キヤパシタ、３０１……同期接点、４３２……制
御回路、４３３……せん光開始回路。
The figure is a circuit diagram of an embodiment of an automatic flashing device according to the present invention. 1... Energy storage capacitor, 3... Flash tube, 8... Capacitor, 10... Electronic switch,
204... Phototransistor, 207... Transistor (switch), 208... Light receiving circuit power supply capacitor, 301... Synchronizing contact, 432... Control circuit, 433... Flashing start circuit.
Claims (1)
トリガ電極を有する電子せん光管と、第１の電子
スイツチとからなる放電回路と、 せん光発光させるときに上記第１の電子スイツ
チにトリガ信号を供給してこれを導通させると共
に上記せん光管のトリガ電極にトリガ信号を供給
して、上記エネルギ蓄積キヤパシタに蓄積されて
いる電荷を上記せん光管を通して放電させるせん
光開始回路と、 上記せん光管が発生するせん光発光を停止させ
るべきときに発光停止信号を発生する制御回路
と、 上記発光停止信号によつて駆動されて上記第１
の電子スイツチを遮断してせん光発光を停止させ
るせん光停止回路とからなり、 特徴として、上記制御回路は、上記せん光によ
る反射光の受光量が所定値に達すると上記発光停
止信号を発生する感光素子を含む受光回路と、せ
ん光発光前に上記エネルギ蓄積キヤパシタより上
記第１のスイツチが遮断状態にある間は導通状態
にあり、上記第１の電子スイツチが導通状態にあ
る間は遮断状態にあるスイツチング素子を経て供
給される電荷によつて上記せん光発光前に予め充
電される受光回路用電源キヤパシタと、該受光回
路用電源キヤパシタと直列に接続されていて、上
記第１の電子スイツチの導通に応動して導通状態
に駆動されて上記受光回路用電源キヤパシタを上
記受光回路に接続し、上記第１の電子スイツチの
遮断に応動して遮断状態に戻る通常遮断状態の第
２の電子スイツチと、該第２の電子スイツチが導
通状態にある間、上記受光回路用電源キヤパシタ
によつて上記受光回路に供給される動作電圧を安
定化するための電圧調整器とを具備している、自
動せん光装置。[Claims] 1. Energy storage capacitors connected in series;
a discharge circuit consisting of an electronic flash tube having a trigger electrode and a first electronic switch, and a discharge circuit that supplies a trigger signal to the first electronic switch to make it conductive when emitting flashlight; a flash initiation circuit for supplying a trigger signal to a trigger electrode of the energy storage capacitor to discharge the charge stored in the energy storage capacitor through the flash tube; and when the flash light emission generated by the flash tube is to be stopped. a control circuit that generates a light emission stop signal to the first light emission stop signal;
and a flash stop circuit that shuts off the electronic switch of the flash light to stop the flash light emission.Characteristically, the control circuit generates the light emission stop signal when the amount of light reflected by the flash reaches a predetermined value. A light-receiving circuit including a photosensitive element is connected to the energy storage capacitor before flashing and is in a conductive state while the first switch is in a cut-off state, and is cut-off while the first electronic switch is in a conductive state. a power supply capacitor for a light receiving circuit which is charged in advance before the flashing by a charge supplied through the switching element in the state; A second switch in a normal shut-off state is driven to a conductive state in response to the conduction of the switch to connect the power supply capacitor for the light receiving circuit to the light receiving circuit, and returns to the cut-off state in response to the shutoff of the first electronic switch. an electronic switch; and a voltage regulator for stabilizing the operating voltage supplied to the light receiving circuit by the light receiving circuit power capacitor while the second electronic switch is in a conductive state. , automatic flashing device.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE93116 | 1970-08-24 | ||
| BE94290 | 1970-09-23 | ||
| BE100618 | 1971-03-08 | ||
| BE102057 | 1971-04-09 | ||
| BE104488 | 1971-06-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS50112028A JPS50112028A (en) | 1975-09-03 |
| JPS629890B2 true JPS629890B2 (en) | 1987-03-03 |
Family
ID=27507527
Family Applications (11)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7164681A Pending JPS524933B1 (en) | 1970-08-24 | 1971-08-24 | |
| JP7181674A Expired JPS5427140B2 (en) | 1970-08-24 | 1974-06-20 | |
| JP49071817A Pending JPS50112026A (en) | 1970-08-24 | 1974-06-20 | |
| JP49071819A Expired JPS629890B2 (en) | 1970-08-24 | 1974-06-20 | |
| JP7182374A Expired JPS5410099B2 (en) | 1970-08-24 | 1974-06-20 | |
| JP49071824A Pending JPS50112032A (en) | 1970-08-24 | 1974-06-20 | |
| JP49071820A Pending JPS50112029A (en) | 1970-08-24 | 1974-06-20 | |
| JP7182174A Expired JPS544849B2 (en) | 1970-08-24 | 1974-06-20 | |
| JP49071818A Pending JPS50112027A (en) | 1970-08-24 | 1974-06-20 | |
| JP49071822A Pending JPS50112031A (en) | 1970-08-24 | 1974-06-20 | |
| JP1978169777U Pending JPS54102119U (en) | 1970-08-24 | 1978-12-08 |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7164681A Pending JPS524933B1 (en) | 1970-08-24 | 1971-08-24 | |
| JP7181674A Expired JPS5427140B2 (en) | 1970-08-24 | 1974-06-20 | |
| JP49071817A Pending JPS50112026A (en) | 1970-08-24 | 1974-06-20 |
Family Applications After (7)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7182374A Expired JPS5410099B2 (en) | 1970-08-24 | 1974-06-20 | |
| JP49071824A Pending JPS50112032A (en) | 1970-08-24 | 1974-06-20 | |
| JP49071820A Pending JPS50112029A (en) | 1970-08-24 | 1974-06-20 | |
| JP7182174A Expired JPS544849B2 (en) | 1970-08-24 | 1974-06-20 | |
| JP49071818A Pending JPS50112027A (en) | 1970-08-24 | 1974-06-20 | |
| JP49071822A Pending JPS50112031A (en) | 1970-08-24 | 1974-06-20 | |
| JP1978169777U Pending JPS54102119U (en) | 1970-08-24 | 1978-12-08 |
Country Status (3)
| Country | Link |
|---|---|
| JP (11) | JPS524933B1 (en) |
| DE (5) | DE2142081B2 (en) |
| GB (5) | GB1374249A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2738984A1 (en) * | 1977-08-30 | 1979-03-15 | Rollei Werke Franke Heidecke | ELECTRONIC FLASH DEVICE FOR PHOTOGRAPHIC RECORDING PURPOSES |
| JPS55134823A (en) * | 1979-04-06 | 1980-10-21 | Olympus Optical Co Ltd | Strobe light emission control system |
| GB2134662B (en) * | 1983-01-24 | 1986-02-05 | Eastman Kodak Co | Electronic flash apparatus |
| US4540265A (en) * | 1983-01-24 | 1985-09-10 | Eastman Kodak Company | Energy-saving electronic flash apparatus |
| JPS63170484U (en) * | 1987-04-23 | 1988-11-07 | ||
| EP1083458A3 (en) * | 1999-09-07 | 2005-07-27 | Konica Corporation | Lens-fitted film unit with strobe circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1907059A1 (en) * | 1968-02-13 | 1969-10-02 | Lumina Sprl | Device for controlling capacitor discharge pulses |
| US3519879A (en) * | 1968-07-25 | 1970-07-07 | Honeywell Inc | Flash apparatus with automatic light termination having gating and anticipation means |
| JPS4838174U (en) * | 1971-09-01 | 1973-05-10 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5149410A (en) * | 1974-10-25 | 1976-04-28 | Hitachi Ltd | TATEJIKUGATADENDOKI |
-
1971
- 1971-08-21 DE DE19712142081 patent/DE2142081B2/en not_active Ceased
- 1971-08-21 DE DE2166612*A patent/DE2166612B2/en not_active Ceased
- 1971-08-21 DE DE2166611A patent/DE2166611B2/en not_active Withdrawn
- 1971-08-21 DE DE2166613*A patent/DE2166613B2/en not_active Ceased
- 1971-08-21 DE DE19712166610 patent/DE2166610A1/en active Pending
- 1971-08-24 GB GB2022174A patent/GB1374249A/en not_active Expired
- 1971-08-24 GB GB2016474A patent/GB1374248A/en not_active Expired
- 1971-08-24 GB GB1991974A patent/GB1374246A/en not_active Expired
- 1971-08-24 JP JP7164681A patent/JPS524933B1/ja active Pending
- 1971-08-24 GB GB3970471A patent/GB1374245A/en not_active Expired
- 1971-08-24 GB GB2016374A patent/GB1374247A/en not_active Expired
-
1974
- 1974-06-20 JP JP7181674A patent/JPS5427140B2/ja not_active Expired
- 1974-06-20 JP JP49071817A patent/JPS50112026A/ja active Pending
- 1974-06-20 JP JP49071819A patent/JPS629890B2/ja not_active Expired
- 1974-06-20 JP JP7182374A patent/JPS5410099B2/ja not_active Expired
- 1974-06-20 JP JP49071824A patent/JPS50112032A/ja active Pending
- 1974-06-20 JP JP49071820A patent/JPS50112029A/ja active Pending
- 1974-06-20 JP JP7182174A patent/JPS544849B2/ja not_active Expired
- 1974-06-20 JP JP49071818A patent/JPS50112027A/ja active Pending
- 1974-06-20 JP JP49071822A patent/JPS50112031A/ja active Pending
-
1978
- 1978-12-08 JP JP1978169777U patent/JPS54102119U/ja active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1907059A1 (en) * | 1968-02-13 | 1969-10-02 | Lumina Sprl | Device for controlling capacitor discharge pulses |
| US3519879A (en) * | 1968-07-25 | 1970-07-07 | Honeywell Inc | Flash apparatus with automatic light termination having gating and anticipation means |
| JPS4838174U (en) * | 1971-09-01 | 1973-05-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2142081A1 (en) | 1972-04-13 |
| GB1374245A (en) | 1974-11-20 |
| DE2166612B2 (en) | 1975-12-04 |
| DE2166610A1 (en) | 1974-11-14 |
| JPS50111566A (en) | 1975-09-02 |
| JPS50112026A (en) | 1975-09-03 |
| DE2166613A1 (en) | 1975-05-07 |
| JPS5427140B2 (en) | 1979-09-07 |
| DE2166612A1 (en) | 1975-05-07 |
| JPS50112029A (en) | 1975-09-03 |
| JPS50112032A (en) | 1975-09-03 |
| GB1374249A (en) | 1974-11-20 |
| DE2166611B2 (en) | 1978-05-18 |
| JPS50112030A (en) | 1975-09-03 |
| JPS5410099B2 (en) | 1979-05-01 |
| DE2142081B2 (en) | 1976-02-12 |
| DE2166611A1 (en) | 1975-05-07 |
| JPS54102119U (en) | 1979-07-18 |
| JPS50112027A (en) | 1975-09-03 |
| JPS50112028A (en) | 1975-09-03 |
| JPS524933B1 (en) | 1977-02-08 |
| GB1374246A (en) | 1974-11-20 |
| JPS50112031A (en) | 1975-09-03 |
| DE2166613B2 (en) | 1975-10-30 |
| JPS50112025A (en) | 1975-09-03 |
| GB1374247A (en) | 1974-11-20 |
| GB1374248A (en) | 1974-11-20 |
| JPS544849B2 (en) | 1979-03-10 |
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