DE697870C - Arrangement of photographic cameras with built-in exposure meters - Google Patents

Arrangement of photographic cameras with built-in exposure meters

Info

Publication number
DE697870C
DE697870C DE1935R0098369 DER0098369D DE697870C DE 697870 C DE697870 C DE 697870C DE 1935R0098369 DE1935R0098369 DE 1935R0098369 DE R0098369 D DER0098369 D DE R0098369D DE 697870 C DE697870 C DE 697870C
Authority
DE
Germany
Prior art keywords
arrangement
built
photographic cameras
exposure meters
lens
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
DE1935R0098369
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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by OEDOEN RISZDORFER DR filed Critical OEDOEN RISZDORFER DR
Application granted granted Critical
Publication of DE697870C publication Critical patent/DE697870C/en
Expired legal-status Critical Current

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Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS 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
    • G03B7/00Control of exposure by setting shutters, diaphragms or filters, separately or conjointly
    • G03B7/08Control 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
    • G03B7/081Analogue circuits
    • G03B7/085Analogue circuits for control of aperture

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cameras In General (AREA)

Description

Anordnung an fotografischen Kameras mit-eingebautem Belichtungsmesser Die Erfindung betrifft eine Anordnung an fotografischen Kameras mit auswechselbarer Optik und mit eingebautem elektrischen Belichtungsmesser. Die bei Kameras mit auswechsielbarer 'Optik verwendeten Objektive -haben im allgemeinen verschiedene öffnungen, d.1-1. - verschiedene Lichtstärken und verschiederue Bildwinkel: Es hat sich gezeigt, daß @es vorteilhaft ist, für verschiedene Bildwinkel und verschiedene, Lichtstärken diesen entsprechend abgestimmte Fotozellen zu verwenden, insbesondere auch dann,. wenn mit ,dem Strom der Fotozelle auch Regelorgane, z. B.,die Blende des Objektivs, betätigt werden soll. Im Sinne der Erfindung wird deshalb bei diesen Kameras jedem Objektiv eine besondere Fotozelle zugeordnet, die an dem das Objektiv an der Kamera befestigenden Träger angeordnet ist.Arrangement on photographic cameras with built-in exposure meter The invention relates to an arrangement on photographic cameras with exchangeable optics and with built-in electrical exposure meter. The lenses used in cameras with interchangeable optics generally have different openings, i.e. 1-1. - Different light intensities and different image angles: It has been shown that it is advantageous to use photocells adapted accordingly for different image angles and different light intensities, especially then. if with, the current of the photocell also regulating organs, z. B., the aperture of the lens should be operated. For the purposes of the invention, each lens is therefore assigned a special photocell in these cameras, which is arranged on the carrier that attaches the lens to the camera.

Einige Ausführungsbeispiele zeigen die Abbildungen im Schaubild.The figures in the diagram show some exemplary embodiments.

In der Fig. i sind die 'Fotozelle 43, dgr Obj.ektivtubus 145 und der Sucher 146 auf einer gemeinsamen Grundplatte 147 befestigt. Diese Grundplatte ist am Gehäuse 148 des Apparates z. B. mit einem Bajonettverschlüß befestigbar. Hierdurch ist die Möglichkeit des leichten Austauschens gegeben. Die durch den Fotozellenstrom gespeisten zwei Wicklungeni49 und i5o liegen zwischen den Polen der beiden koaxial angeordneten Magneten i 5 i und 152. An den Wellender Schwingspulen sind an Armen r53 und 154 angeordnete Schirmelemente 15 5 bzw. 15 6 befestigt, deren: jede je einen dreieckigen Aus.-schmitt 157 besitzt. Die - beiden Ausschnitte ergeben gemeinsam in jeder Stellung der Schirmelemente, quadratische Lichtdurchla,B-öffnungen. Dadurch :erreicht man, da.ß die zwischen den beiden Schirmen befindlichen Durchlaß,öffnüngen immer einander ähnliche Gebilde sind. Vor der Zelle 143 befindet sich eine einstellbare Lichtblende i 6o, mit welcher irgendwelche die Belichtung beeinflussenden Faktoren berücksichtigt werden können. Der Apparat kann natürlich auch so ausgebildet werden, daß die beiden Schirmelementemichd von oben nach unten, sonde-x@n von links nach rechts beweglich sind. Zu diesem Behufe verdreht man die Enden des Hufeisenmagnets in b,ezug zur Grundebene um. 9o°, so daß die zugehörigen Wicklungen mit senkrechten Wellen angeordnet -werden .können. Eine solche Ausführungsform zeigt beispI:elsweise die Abb.2. In diesem Falle sind die Pole der Magnete 161 und 162 in bezug zur Ebene 163 um 9o° verdreht, sie stehen !einander gegenüber, so daß die Wellen der Spulen 16¢ senkrechte Lage besitzen. Hieraus folgend bewegen sich die beiden Schirmelemente 165 und 166 waagerecht. Die Ebene der Bewegung ist auch in diesem Falle -zu den Wellen der Schwingspulen parallel.In FIG. 1, the photocell 43, the lens tube 145 and the viewfinder 146 are attached to a common base plate 147. This base plate is attached to the housing 148 of the apparatus, for. B. can be fastened with a bayonet catch. This enables easy replacement. The two windings i49 and i5o fed by the photocell current are located between the poles of the two coaxially arranged magnets i 5 i and 152. On the shafts of the voice coils are attached to arms r53 and 154 arranged shielding elements 1 5 5 and 1 5 6, each of which is has a triangular Aus.-schmitt 157 . The two cutouts together result in square light passages, B-openings in every position of the screen elements. In this way: one achieves that the passages between the two screens are always similar structures. In front of the cell 143 there is an adjustable light screen i 6o, with which any factors influencing the exposure can be taken into account. The apparatus can of course also be designed in such a way that the two screen elements can be moved from top to bottom, sonde-x @ n from left to right. To do this, twist the ends of the horseshoe magnet in relation to the ground plane. 90 °, so that the associated windings can be arranged with vertical waves. Such an embodiment is shown, for example, in Fig.2. In this case the poles of the magnets 161 and 162 are rotated by 90 ° with respect to the plane 163, they are opposite one another, so that the shafts of the coils 16 have a vertical position. As a result, the two screen elements 165 and 166 move horizontally. In this case, too, the plane of motion is parallel to the waves of the voice coils.

Die in der Abb. 3 dargestellte Ausführungsform weicht von den obigen darin ab, daß dort das Schirmelement dreiteilig ist. Dementsprechend befinden sich an der Grundplatte 167 drei Magnetei 6$, 169 und 170. Zwischen den Polen derselben schwingen die Spulen 172, 171 und 173. lm übrigen ist die Konstruktion den in den vorangehenden Zeichnungen dargestellten Ausführungen .ähnlich. Da drei Schirmelemente _ vorgesehen smd, ist die Lichtdurchlaßöffnung ein regelmäßiges Sechseck.The embodiment shown in Fig. 3 differs from the above from the fact that there the screen element is in three parts. Accordingly, there are on the base plate 167 three magnets 6 $, 169 and 170. Between the poles of the same the coils 172, 171 and 173 vibrate. Otherwise, the construction is the same as in the previous drawings .ähnlich. There are three screen elements If provided, the light passage opening is a regular hexagon.

Claims (2)

PATENTANSPRÜCHE: i. Anordnung an fotografischen Kameras mit auswechselbarer Optik und mit eingebautem elektrischen Belichtungsmesser, dadurch gekennzeichnet; daß die fotoelektrische Zelle und das Objektiv an einem gemeinsamen mit der Kamera lösbar verbundenen Träger angeordnet sind. PATENT CLAIMS: i. Arrangement of photographic cameras with interchangeable Optics and with built-in electric light meter, characterized; that the photoelectric cell and the lens are on a common with the camera releasably connected carrier are arranged. 2. Anordnung nach Anspruch i, dadurch geltennzeichnet, däß auch das vom Zellenstrom betätigte elektrische Spuleninstrum-ent an dem Träger angeordnet ist.2. Arrangement according to claim i, characterized It also applies that the electrical coil instrument actuated by the cell current also applies is arranged on the carrier.
DE1935R0098369 1934-03-16 1935-03-15 Arrangement of photographic cameras with built-in exposure meters Expired DE697870C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HU697870X 1934-03-16

Publications (1)

Publication Number Publication Date
DE697870C true DE697870C (en) 1940-10-29

Family

ID=10980029

Family Applications (1)

Application Number Title Priority Date Filing Date
DE1935R0098369 Expired DE697870C (en) 1934-03-16 1935-03-15 Arrangement of photographic cameras with built-in exposure meters

Country Status (1)

Country Link
DE (1) DE697870C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963375C (en) * 1950-09-02 1957-05-09 Hans Carl Opfermann Electric exposure meter with a measuring mechanism designed as a profile instrument

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE963375C (en) * 1950-09-02 1957-05-09 Hans Carl Opfermann Electric exposure meter with a measuring mechanism designed as a profile instrument

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