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DE1096742B - Camera with built-in light meter - Google Patents

Camera with built-in light meter

Info

Publication number
DE1096742B
DE1096742B DEV9091A DEV0009091A DE1096742B DE 1096742 B DE1096742 B DE 1096742B DE V9091 A DEV9091 A DE V9091A DE V0009091 A DEV0009091 A DE V0009091A DE 1096742 B DE1096742 B DE 1096742B
Authority
DE
Germany
Prior art keywords
light
camera
built
image
image plane
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
Application number
DEV9091A
Other languages
German (de)
Inventor
Feodor Graul
Paul Schmidt
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.)
FREIBERGER PRAEZ SMECHANIK VEB
Original Assignee
FREIBERGER PRAEZ SMECHANIK VEB
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 FREIBERGER PRAEZ SMECHANIK VEB filed Critical FREIBERGER PRAEZ SMECHANIK VEB
Priority to DEV9091A priority Critical patent/DE1096742B/en
Publication of DE1096742B publication Critical patent/DE1096742B/en
Pending legal-status Critical Current

Links

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
    • G03B7/099Arrangement of photoelectric elements in or on the camera
    • G03B7/0993Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997Through the lens [TTL] measuring
    • G03B7/09971Through the lens [TTL] measuring in mirror-reflex cameras
    • G03B7/09977Through the lens [TTL] measuring in mirror-reflex cameras with a movable light-measuring element
    • 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
    • G03B7/099Arrangement of photoelectric elements in or on the camera
    • G03B7/0993Arrangement of photoelectric elements in or on the camera in the camera
    • G03B7/0997Through the lens [TTL] measuring

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Description

Kamera mit eingebautem Belichtungsmesser Die Erfindung betrifft eine Kamera mit eingebautem Belichtungsmesser, deren vom Anzeigeinstrument getrennter, eine punktförmige oder eine sehr kleine Wirkungsfläche besitzender, zur Messung kleiner Bildausschnitte geeigneter lichtempfindlicher Strahlungsempfänger in den Aufnahme- oder äquivalenten Strahlengang in, oder in unmittelbarer Nähe, der Bildebene einschwenkbar ist.Built-in exposure meter camera The invention relates to a Camera with built-in exposure meter, whose separate, a punctiform or a very small effective area, for measurement small image sections of suitable light-sensitive radiation receivers in the Recording or equivalent beam path in or in the immediate vicinity of the image plane is pivotable.

Es sind photographische Kameras bekannt, in welche die Belichtungsmesser, deren lichtempfindliche Strahlungsempfänger eine punktförmige oder eine sehr kleine Wirkungsfläche besitzen, fest eingebaut und so angeordnet sind, daß sie entweder- die Belichtungswerte integrierend aus dem gesamten. Bildfeld oder nur aus einem bestimmten Teil des Bildfeldes, in dem sich die wichtigsten Aufnahmeobjekte befinden, ermitteln. Die erstgenannten Anordnungen führten insbesondere dort zu Fehlbelichtungen, wo starke Lichtkontraste auftreten und dabei großer Wert auf die richtige Belichtung eines kleinen Bildausschnittes gelegt wird, der im Vergleich zu seiner Umgebung entweder sehr hell oder sehr dunkel ist, während die zweitgenannten Anordnungen dann zu Fehlbelichtungen führen, wenn. die Forderung nach einem richtig belichteten Gesamtbild besteht.There are photographic cameras known in which the light meters, whose light-sensitive radiation receiver is a punctiform or a very small one Have effective surface, are permanently installed and are arranged in such a way that they either- integrating the exposure values from the total. Image field or just from one certain part of the image field in which the most important subjects are located, determine. The first-mentioned arrangements led to incorrect exposures in particular there, where strong light contrasts occur and great importance is attached to the correct exposure of a small section of the image compared to its surroundings is either very light or very dark, while the second-mentioned arrangements then lead to incorrect exposures, if. the requirement for a properly exposed Overall picture exists.

Dieser Nachteil wird erfindungsgemäß dadurch behoben, däß zur integralen Messung größerer Bildausschnitte der lichtempfindliche Strahlungsempfänger aus der Bildebene in Richtung des einfallenden Lichtes verschiebbar angeordnet ist.According to the invention, this disadvantage is eliminated by the integral Measurement of larger image sections of the light-sensitive radiation receiver from the Image plane is arranged displaceably in the direction of the incident light.

Eine andere erfindungsgemäße Ausführung ergibt sich, wenn für die Dauer der integralen Belichtungsmessung die Brechkraft der Optik veränderbar ist.Another embodiment of the invention arises when for the Duration of the integral exposure measurement the refractive power of the optics can be changed.

Zwei Ausführungsbeispiele des Gegenstandes der Erfindung sind in der Zeichnung schematisch dargestellt, und zwar zeigt Fig. 1 eine Kamera in Seitenansicht mit in Achsenrichtung verschiebbarer Photozelle und Fig.2 eine Kamera mit veränderbarer Brechkraft der Optik.Two embodiments of the subject matter of the invention are shown in FIG Drawing shown schematically, namely Fig. 1 shows a camera in side view with axially displaceable photocell and Fig. 2 a camera with changeable Refractive power of the optics.

In Fig. 1 befindet sich eine Photozelle 1 im eingeschwenkten Zustand unmittelbar vor der Bildebene 2 und dient in dieser Lage zur Messung der Belichtungswerte kleinster Bildausschnitte. Durch Drehen eines Knopfes 3 kann die Photozelle ein- und ausgeschwenkt werden. Beim Herausziehen des Knopfes 3 in die gestrichelt dargestellte Lage wird die Photozelle in Richtung des einfallenden Lichtes bewegt und führt dort eine integrale Belichtungsmessung eines größeren Bildausschnittes oder des Gesamtbildes durch.In Fig. 1, a photocell 1 is in the swiveled-in state immediately in front of the image plane 2 and in this position is used to measure the exposure values smallest image details. By turning a button 3, the photocell can be switched on and swiveled out. When pulling out the button 3 in the dashed line Position, the photocell is moved in the direction of the incident light and leads there an integral exposure measurement of a larger image section or of the entire image by.

In Fig. 2 ist dargestellt, wie die integrale Belichtungsmessung durch Veränderung der Brechkraft der Optik 6 erreicht wird. Durch Vorschaltung einer Zerstreuungslinse 4 wird die Entfernung zwischen Bildebene 5 und Optik 6 vergrößert, so daß nunmehr die Photozelle 7 weit außerhalb der Bildebene 5' liegt.In Fig. 2 it is shown how the integral exposure measurement by Change in the refractive power of the optics 6 is achieved. By adding a diverging lens 4, the distance between the image plane 5 and the optics 6 is increased, so that now the photocell 7 is far outside the image plane 5 '.

Claims (2)

PATENTANSPRÜCHE: 1. Kamera mit eingebautem Belichtungsmesser, deren vom Anzeigeinstrument getrennter, eine punktförmige oder eine sehr kleine Wirkungsfläche besitzender, zur Messung kleiner Bildausschnitte geeigneter lichtempfindlicher Strahlungsempfänger in den Aufnahme- oder äquivalenten Strahlengang in, oder in unmittelbare Nähe, der Bildebene einschwenkbar ist, dadurch gekennzeichnet, daß zur integralen Messung größerer Bildausschnitte der lichtempfindliche Strahlungsempfänger aus der Bildebene in Richtung des einfallenden Lichtes verschiebbar angeordnet ist. PATENT CLAIMS: 1. Camera with built-in light meter, whose Separate from the display instrument, a punctiform or a very small effective area own light-sensitive radiation receiver suitable for measuring small image sections in the recording or equivalent beam path in, or in the immediate vicinity of the The image plane can be swiveled in, characterized in that for integral measurement Larger image sections of the light-sensitive radiation receiver from the image plane is arranged displaceably in the direction of the incident light. 2. Kamera mit eingebautem Belichtungsmesser wie in Anspruch 1, dadurch gekennzeichnet, daß für die Dauer der integralen Belichtungsmessung die Brechkraft der Optik veränderbar ist. In Betracht gezogene Druckschriften: Deutsche Patentschriften Nr. 621380, 691699, 736 864; schweizerische Patentschrift Nr. 248 819; britische Patentschrift Nr. 746 837.2. Camera with built-in exposure meter as in claim 1, characterized in that the refractive power of the optics can be changed for the duration of the integral exposure measurement. Considered publications: German Patent Nos. 621380, 691699, 736 864; Swiss Patent No. 248 819; British Patent No. 746 837.
DEV9091A 1955-06-23 1955-06-23 Camera with built-in light meter Pending DE1096742B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEV9091A DE1096742B (en) 1955-06-23 1955-06-23 Camera with built-in light meter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEV9091A DE1096742B (en) 1955-06-23 1955-06-23 Camera with built-in light meter

Publications (1)

Publication Number Publication Date
DE1096742B true DE1096742B (en) 1961-01-05

Family

ID=7572542

Family Applications (1)

Application Number Title Priority Date Filing Date
DEV9091A Pending DE1096742B (en) 1955-06-23 1955-06-23 Camera with built-in light meter

Country Status (1)

Country Link
DE (1) DE1096742B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905630B1 (en) * 1969-02-05 1970-05-14 Kodak Ag Single-lens reflex camera with electronic exposure time control

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE621380C (en) * 1933-11-12 1935-11-06 Paul Franke Light meter for photographic apparatus with viewfinder
DE691699C (en) * 1935-05-03 1940-06-03 I G Farbenindustrie Akt Ges Photoelectric light meter assembled with the viewfinder of a photo or cinema camera
DE736864C (en) * 1941-07-24 1943-06-30 Ernst Presser Single lens reflex camera with built-in electric light meter
CH248819A (en) * 1945-06-29 1947-05-31 Alfred Oschwald & Co Photo-taking device with built-in light meter.
GB746837A (en) * 1952-04-16 1956-03-21 Andre Clement Coutant Improvements in apparatus for taking photographs and in cinematography

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE621380C (en) * 1933-11-12 1935-11-06 Paul Franke Light meter for photographic apparatus with viewfinder
DE691699C (en) * 1935-05-03 1940-06-03 I G Farbenindustrie Akt Ges Photoelectric light meter assembled with the viewfinder of a photo or cinema camera
DE736864C (en) * 1941-07-24 1943-06-30 Ernst Presser Single lens reflex camera with built-in electric light meter
CH248819A (en) * 1945-06-29 1947-05-31 Alfred Oschwald & Co Photo-taking device with built-in light meter.
GB746837A (en) * 1952-04-16 1956-03-21 Andre Clement Coutant Improvements in apparatus for taking photographs and in cinematography

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1905630B1 (en) * 1969-02-05 1970-05-14 Kodak Ag Single-lens reflex camera with electronic exposure time control

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