DE660437C - Method and arrangement for automatic control of the exposure in photographic recordings - Google Patents

Method and arrangement for automatic control of the exposure in photographic recordings

Info

Publication number
DE660437C
DE660437C DER83123D DER0083123D DE660437C DE 660437 C DE660437 C DE 660437C DE R83123 D DER83123 D DE R83123D DE R0083123 D DER0083123 D DE R0083123D DE 660437 C DE660437 C DE 660437C
Authority
DE
Germany
Prior art keywords
exposure
circuit
arrangement
account
taken
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
Application number
DER83123D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
OEDOEN RISZDORFER DR
Original Assignee
OEDOEN RISZDORFER DR
Publication date
Priority to DER83123D priority Critical patent/DE660437C/en
Application granted granted Critical
Publication of DE660437C publication Critical patent/DE660437C/en
Expired legal-status Critical Current

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Classifications

    • 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
    • G03B7/00—Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08—Control effected solely on the basis of the response, to the intensity of the light received by the camera, of a built-in light-sensitive device
    • G03B7/081—Analogue circuits
    • G03B7/085—Analogue circuits for control of aperture

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Exposure Control For Cameras (AREA)

Description

Die Erfindung betrifft ein Verfahren und Anordnungen zur selbsttätigen Regelung der Belichtung bei photographischen Aufnahmen mittels einer in einen Stromkreis geschalteten lichtempfindlichen Zelle, durch die ein die Intensität der Belichtung oder die Belichtungsdauer regelndes Organ beeinflußt wird und auch andere Korrekturgrößen berücksichtigt werden.The invention relates to a method and arrangements for the automatic control of the Exposure for photographic recordings by means of a circuit connected in a circuit light-sensitive cell, through which a the intensity of the exposure or the exposure time regulating organ is influenced and other corrective variables are also taken into account will.

Erfindungsgemäß werden die Korrekturgrößen, z. B. Blende oder Versehlußgeschwindigkeit, Plattenempfindlicbkeit, Filterdichte u. dgl., durch Verstellen von Regelwiderständen berücksichtigt. According to the invention, the correction variables, z. B. aperture or closure speed, Plate sensitivity, filter density, etc., taken into account by adjusting the control resistors.

Es sind photographische Apparate bekannt, bei denen eine Photozelle durch die jeweilige Helligkeit des Aufnahmeobjektivs beeinflußt wird und im Stromkreis der Zelle ein Regelwiderstand eingebaut ist. Dieser Widerstand dient aber nur zum Konstanthalten der Spannung und der Stromstärke im Zellenstromkreis. Zum Anpassen der Farbenempfindlichkeit an die Empfindlichkeit der Zelle dient ein vor diese geschaltetes optisches Filter; die Blende bzw. Belichtungszeit, deren Organe mechanisch miteinander gekuppelt sind, wird nach Einstellung des anderen Organs (Belichtungszeit bzw. Blende) durch ein vom Photostrom elektromagnetisch betriebenes Stellwerk berücksichtigt.There are photographic apparatus known in which a photocell by the respective Brightness of the taking lens is influenced and a variable resistor in the circuit of the cell is built in. This resistance only serves to keep the voltage and the current in the cell circuit constant. It is used to adapt the color sensitivity to the sensitivity of the cell an optical filter connected in front of them; the aperture or exposure time, their organs are mechanically coupled with each other, after setting the other organ (Exposure time or aperture) by an electromagnetically operated by the photocurrent Signal box taken into account.

Gegenüber dieser bekannten Anordnung wird durch das Verfahren nach der Erfindung die Beeinflussung des Stromkreises der Photozelle entsprechend beliebig vielen Korrekturgrößen ermöglicht, wodurch die genaue Belichtung in einfacher Weise eingestellt werden kann.Compared to this known arrangement, the method according to the invention influencing the circuit of the photocell according to any number of correction variables allows, whereby the exact exposure can be set in a simple manner.

Ein Ausführungsbeispiel einer Anordnung nach der Erfindung zeigt die Zeichnung.An embodiment of an arrangement according to the invention is shown in the drawing.

13 bedeutet die Stromquelle des Kreises 12, in dem die Photozelle 11 liegt. 10 ist ein Strommesser. Der Drehmagnet 14 beeinflußt die Blende 15 des photographischen Apparates. Von den in Reihe liegenden verstellbaren Widerständen ist der Widerstand 16 dem Objektivverschluß durch eine nicht gezeichnete, zwangsläufige Verbindung derart beigeordnet, daß beim Verstellen des Verschlusses auf kürzere Belichtungszeiten Widerstand dem Stromkreis zugeschaltet wird, und umgekehrt. Der Kontakt des Widerstandes wird zweckmäßig mit dem Stellhebel des Objektivverschlusses verbunden. Der Widerstand wird z. B. entsprechend der Plattenempfindlichkeit eingestellt. Der Widerstand dient zum Justieren. Damit ist erreicht, daß die den in Betracht zu ziehenden Korrekturgrößen entsprechend eingestellte Stromstärke über den Magneten 14 die Blende 15 auf die richtige Öffnung stellt.13 means the power source of circuit 12, in which the photocell 11 is located. 10 is a Ammeter. The rotary magnet 14 influences the diaphragm 15 of the photographic apparatus. Of the adjustable resistors in series, the resistor is 16 the lens shutter by a not shown, inevitable connection in such a way assigned that when adjusting the shutter to shorter exposure times resistance is connected to the circuit, and vice versa. The contact of the resistance is conveniently connected to the adjusting lever of the lens shutter. The resistance is z. B. adjusted according to the plate sensitivity. The resistance is used for adjustment. This ensures that the correction variables to be taken into account Correspondingly set current intensity via the magnet 14, the diaphragm 15 on the correct opening.

Es kann naturgemäß die Anordnung auch so getroffen werden, daß man die Blende 15 dem Widerstand 16 beiordnet und über den Magneten 14 den Verschluß einstellt.The arrangement can of course also be made in such a way that the diaphragm 15 associated with the resistor 16 and sets the closure via the magnet 14.

Die Stellhebel der Widerstände gleiten an den den zugeordneten Korrekturgrößen entsprechend eingestellten Skalen.The levers of the resistors slide on the corresponding correction values set scales.

Claims (2)

Patentansprüche:Patent claims: 1. Verfahren zur selbsttätigen Regelung der Belichtung bei photographischen Aufnahmen mittels eines von einem strahlenempfindlichen System beeinflußten Stromkreises, wobei der Strom dieses Kreises ein die Intensität der Belichtung oder die Belichtungsdauer regelndes Organ beeinflußt und auch andere Korrekturgrößen, wie z. B. Plattenempfindlichkeit, berücksichtigt werden, dadurch gekennzeichnet, daß die Korrekturgrößen dadurch berücksichtigt werden, daß in den Stromkreis der Photozelle eingeschaltete Widerstände verstellt werden.1. Procedure for automatic regulation the exposure in photographic recordings by means of one of a radiation-sensitive System influenced circuit, the current of this circuit being the intensity of the exposure or the Exposure duration influences the organ and also other correction variables, such as B. plate sensitivity, must be taken into account, characterized in that that the correction variables are taken into account that in the circuit of the Photocell switched on resistors can be adjusted. 2. Anordnung zur Ausübung des Verfahrens nach Anspruch i, dadurch gekennzeichnet, daß das Stellwerk des Objektivverschlusses bzw. der Blende (15) mit einem im Zellenstromkreis liegenden Regelwiderstand (16) zwangsläufig verbunden ist, so daß durch Veränderung der Verschlußgeschwindigkeit bzw. der Blendenöffnung gleichzeitig die Stärke des Zellenstromes selbsttätig geändert wird.2. Arrangement for performing the method according to claim i, characterized in that that the interlocking of the lens shutter or the aperture (15) with inevitably connected to a variable resistor (16) in the cell circuit is, so that by changing the shutter speed or the aperture at the same time the strength of the cell current is automatically changed. Hierzu 1 Blatt Zeichnungen1 sheet of drawings
DER83123D Method and arrangement for automatic control of the exposure in photographic recordings Expired DE660437C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER83123D DE660437C (en) Method and arrangement for automatic control of the exposure in photographic recordings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER83123D DE660437C (en) Method and arrangement for automatic control of the exposure in photographic recordings

Publications (1)

Publication Number Publication Date
DE660437C true DE660437C (en) 1938-05-25

Family

ID=7416856

Family Applications (1)

Application Number Title Priority Date Filing Date
DER83123D Expired DE660437C (en) Method and arrangement for automatic control of the exposure in photographic recordings

Country Status (1)

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DE (1) DE660437C (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE893268C (en) * 1947-06-27 1953-10-15 Gyoergy Dipl-Ing Jacoby Photoelectric light meter
DE915412C (en) * 1949-09-17 1954-07-22 Erwin E Falkenthal Equipment on photographic cameras for fully automatic exposure adjustment
DE1043801B (en) * 1955-05-17 1958-11-13 Paul Hobruecker Automatic aperture control for photographic, cinematographic or television recording devices
DE1156643B (en) * 1956-06-26 1963-10-31 Voigtlaender Ag Device for automatic exposure control
DE1159263B (en) * 1954-09-13 1963-12-12 Hans Henner Gerke Automatic adjustment device for photographic cameras
DE1188931B (en) * 1957-06-22 1965-03-11 Agfa Ag Photoelectric device for the automatic control of a diaphragm arranged in the objective beam path of a photographic device
DE977581C (en) * 1944-02-27 1967-05-03 Gustav Dr H C Weissenberg Exposure meters for photographic cameras

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977581C (en) * 1944-02-27 1967-05-03 Gustav Dr H C Weissenberg Exposure meters for photographic cameras
DE893268C (en) * 1947-06-27 1953-10-15 Gyoergy Dipl-Ing Jacoby Photoelectric light meter
DE915412C (en) * 1949-09-17 1954-07-22 Erwin E Falkenthal Equipment on photographic cameras for fully automatic exposure adjustment
DE1159263B (en) * 1954-09-13 1963-12-12 Hans Henner Gerke Automatic adjustment device for photographic cameras
DE1043801B (en) * 1955-05-17 1958-11-13 Paul Hobruecker Automatic aperture control for photographic, cinematographic or television recording devices
DE1156643B (en) * 1956-06-26 1963-10-31 Voigtlaender Ag Device for automatic exposure control
DE1188931B (en) * 1957-06-22 1965-03-11 Agfa Ag Photoelectric device for the automatic control of a diaphragm arranged in the objective beam path of a photographic device

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