DE820537C - Electric light meter on photographic enlarging devices - Google Patents
Electric light meter on photographic enlarging devicesInfo
- Publication number
- DE820537C DE820537C DEK1706A DEK0001706A DE820537C DE 820537 C DE820537 C DE 820537C DE K1706 A DEK1706 A DE K1706A DE K0001706 A DEK0001706 A DE K0001706A DE 820537 C DE820537 C DE 820537C
- Authority
- DE
- Germany
- Prior art keywords
- electric light
- dial
- light meter
- exposure
- meter
- 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
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
- G03B27/00—Photographic printing apparatus
- G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
-
- 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
- G03B27/00—Photographic printing apparatus
- G03B27/72—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus
- G03B27/722—Controlling or varying light intensity, spectral composition, or exposure time in photographic printing apparatus when the reproduction scale is changed
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Exposure In Printing And Copying (AREA)
Description
Die Erfindung betrifft einen elektrischen Belichtungsmesser an photographischen Vergrößerungsgeräten.The invention relates to an electric light meter for photographic applications Enlargers.
Solche Einrichtungen sind in verschiedentlichster Weise bereits bekanntgeworden.Such facilities have already become known in a wide variety of ways.
Das Wesentliche der Erfindung besteht darin, daß durch das je nach der einzustellenden bzw. gewünschten Vergrößerung erforderliche Verschieben des Geräteträgers auf der Säule gleichzeitig und gemeinsam dr.rchÜbertragungsmittel, wie Zahnstange, Ritzel, Seilzug, Schrägfläche usw., sich die Skalenscheibe des Meßinstrumentes gegenüber dem Normalausschlag des Zeigers verschiebt o. dgl., wodurch unmittelbar der wirkliche Belichtungseinstellwert angezeigt wird.The essence of the invention is that by depending on the required or required magnification move the Device carrier on the column at the same time and together dr.rch transmission means, such as rack, pinion, cable, inclined surface, etc., the dial of the measuring instrument compared to the normal deflection of the pointer shifts o. The like., As a result immediately the real exposure setting value is displayed.
Dieser Belichtungseinstellwert gilt für eine bestimmte Papiersorte, z. B. Sorte normal. Bei Verwendung von Papiersorten, die einen anderen Belichtungsfaktor haben, ist erfindungsgemäß eine weitere Einrichtung vorhanden, die diesen Faktor berücksichtigt. Dies erfolgt durch zusätzliche Einstellung an einem die Belichtungsfaktoren anzeigenden Nonius, der zweckmäßigerweise um die Skalenscheibe des Meßinstrumentes gelagert ist.This exposure setting is for a specific type of paper, z. B. variety normal. When using paper types that have a different exposure factor have, according to the invention there is a further device that this factor considered. This is done by additional setting on one of the exposure factors indicating vernier, which is expediently around the dial of the measuring instrument is stored.
Die Bestimmung des Belichtungsfaktors erfolgt in bekannter Weise durch Belichten und Entwickeln eines Probestreifens.The exposure factor is determined in a known manner Exposure and development of a test strip.
Ein Ausführungsbeispiel des Erfindungsgegenstandes ist zeichnerisch dargestellt. Es zeigt einen Belichtungsmesser an einem photographischen Vergrößerungsgerät.An embodiment of the subject matter of the invention is shown in the drawing shown. It shows a light meter on a photographic enlarger.
An der Säule i ist der Arm 2 beweglich befestigt, der das Lampenhaus 3, Negativbildbühne 4 und Projektionsoptik 5 trägt. Unterhalb der Projektionsoptik 5 wird in den Strahlengang eine lichtempfindliche Zelle 6 schwenkbar zugeschaltet. Der dabei gemessene Lichtstrom wird in einem Meßinstrument 7 am Ausschlag des Zeigers 7° sichtbar. Das Meßinstrument 7 ist am Geräteträger 2 in der Nähe der Säule i befestigt. Die Skalenscheibe 8 @ des Meßinstrumentes 7 ist durch Friktions- oder Rastkupplung mit dem Zahnkranz 8° verbunden, der gleichzeitig den Nonius 8b für den Belichtungsfaktor trägt. Letzterer steht über die Räder 911, 9b mit einer an der Säule i befestigten Zahnstange i° @im Eingriff. Beim Verschieben des Armes 2 auf der Säule i verdreht sich dabei gleichzeitig die Skalenscheibe 8, so daß entsprechend der jeweiligen Bildvergrößerung unmittelbar der zugehörige Belichtungseinstellwert ablesbar ist.The arm 2, which holds the lamp house, is movably attached to the column i 3, negative image stage 4 and projection optics 5 carries. Below the projection optics 5, a light-sensitive cell 6 is pivotably switched on in the beam path. The luminous flux measured is in a measuring instrument 7 at the deflection of the pointer 7 ° visible. The measuring instrument 7 is attached to the equipment carrier 2 in the vicinity of the column i. The dial 8 @ of the measuring instrument 7 is by friction or locking coupling connected to the ring gear 8 °, which is also the vernier 8b for the exposure factor wearing. The latter stands on the wheels 911, 9b with one attached to the column i Rack i ° @ in engagement. Twisted when moving arm 2 on column i at the same time the dial 8, so that according to the respective The associated exposure setting value can be read off immediately when the image is enlarged.
An Stelle einer Zahnradübertragung kann auch ein Seilzug oder das Gleiten eines Hebels entlang einer an der Säule i befestigten Schrägfläche zum Antrieb der Skalenscheibe 8 Verwendung finden.Instead of a gear transmission, a cable or the Sliding of a lever along an inclined surface attached to the column i for the drive the dial 8 find use.
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK1706A DE820537C (en) | 1950-02-09 | 1950-02-09 | Electric light meter on photographic enlarging devices |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK1706A DE820537C (en) | 1950-02-09 | 1950-02-09 | Electric light meter on photographic enlarging devices |
Publications (1)
Publication Number | Publication Date |
---|---|
DE820537C true DE820537C (en) | 1951-11-12 |
Family
ID=7209047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK1706A Expired DE820537C (en) | 1950-02-09 | 1950-02-09 | Electric light meter on photographic enlarging devices |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE820537C (en) |
-
1950
- 1950-02-09 DE DEK1706A patent/DE820537C/en not_active Expired
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