DE631056C - Lighting device with filter arrangement for the projection of lenticular films - Google Patents
Lighting device with filter arrangement for the projection of lenticular filmsInfo
- Publication number
- DE631056C DE631056C DEI47482D DEI0047482D DE631056C DE 631056 C DE631056 C DE 631056C DE I47482 D DEI47482 D DE I47482D DE I0047482 D DEI0047482 D DE I0047482D DE 631056 C DE631056 C DE 631056C
- Authority
- DE
- Germany
- Prior art keywords
- filter
- projection
- lighting device
- carbon holder
- carbon
- 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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
-
- 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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/206—Control of light source other than position or intensity
Description
Bei einem bekannten Verfahren zur Projektion von Linsenrasterfilmen wird zwischen der Lichtquelle und dem Film, dessen Rasterseite der Lichtquelle zugekehrt ist, das Mehrfaltenfilter angeordnet. Um durch die vom Kohlehalter auf das Farbfilter geworfenen Schatten keine Farbstörungen zu erhalten, wurde bereits vorgeschlagen, die Kohlehalter entweder quer zur Linsenrasterung oder parallel hierzu anzuordnen. Für die praktische Ausführung ist es erwünscht, das Filter so nahe als möglich am Spiegel der Bogenlampe anzuordnen. Bei den gebräuchlichen Bogenlampen ist dies insofern schwierig, alsIn a known method for projection of lenticular lenticular films is between the Light source and the film, the raster side of which faces the light source, the multi-fold filter arranged. To go through the thrown from the charcoal holder onto the color filter It has already been proposed to use the charcoal holder for shadows not to get color disturbances either across the lenticular or parallel to be ordered for this. For practical purposes it is desirable to have the filter in this way to be arranged as close as possible to the mirror of the arc lamp. With the common Arc lamps make this difficult in that
,s die positive Kohle ziemlich lang ist, so daß aus diesem Grunde das Filter in größerer Entfernung vom Spiegel angebracht werden muß. Hierbei ist eine farbtonfreie Ausleuchtung der Projektionsfläche nicht zu erreichen., s the positive carbon is quite long, so that for this reason the filter must be placed at a greater distance from the mirror. A color-free illumination of the projection surface cannot be achieved here.
Es wurde nun gefunden, daß es bei geeigneter Form des Filters möglich ist, dieses näher an den Spiegel heranzubringen. Zu diesem Zwecke wird das Filter derart gestaltet, daß einerseits möglichst geringe Verluste durch Abdeckung entstehen, andererseits aber der Kohlehalter sich beliebig hin und her bewegen läßt. Erfindungsgemäß ist das Filter an geeigneten Stellen durchbrochen, so daß es über den Halter der Positivkohle geschoben werden kann. Die Durchbrechung des Filters ist der Form des Kohlehalters angepaßt, wobei letzterer derart gestaltet ist, daß er das Filter entweder quer zur Richtung der Filterstreifen oder parallel zu den Filterstreifen auf einer der Trennungslinien der Filterstreifen abdeckt.It has now been found that with a suitable shape of the filter it is possible to do so closer to the mirror. For this purpose, the filter is designed in such a way that that on the one hand the lowest possible losses occur through cover, on the other hand but the charcoal holder can be moved back and forth at will. This is according to the invention Filter broken at suitable places so that it is over the holder of the positive carbon can be pushed. The opening of the filter is the shape of the carbon holder adapted, the latter being designed in such a way that the filter is either transverse to the direction of the filter strip or parallel to the The filter strips on one of the dividing lines of the filter strips.
In Abb. ι ist die Anordnung des Filters und der Lichtquelle schematisch dargestellt. S bedeutet den Spiegel der Bogenlampe, dessen Brennpunkt bei M liegt, B ist der Lichtbogen, /ζ und P sind die Kohlen der Bogenlampe, und zwar Ιζ die Negativkohle und P die Positivkohle, H der Kohlehalter, F ist das Filter, das für den Durchtritt des Kohlehalters und der Positivkohle P durchbrochen ist.In Fig. Ι the arrangement of the filter and the light source is shown schematically. S means the mirror of the arc lamp, the focal point of which is at M , B is the arc, / ζ and P are the coals of the arc lamp, namely Ιζ the negative carbon and P the positive carbon, H the carbon holder , F is the filter that is used for the Passage of the carbon holder and the positive carbon P is broken.
In Abb. 2 und 3 sind geeignete Formen des Filters und der Kohlehalter beispielsweise dargestellt, wobei die Form des Kohlehalters derart gewählt ist, daß er das Filter entweder nur quer zur Richtung der Filterstreifen (Abb. 2) oder parallel zur Trennungszone der Filterstreifen (Abb. 3) abdeckt. F bedeutet wiederum das Filter mit den Filterstreifen blau, grün, rot (Jb, g, r) und dem Rahmen R. H ist der Kohlehalter, P ist die Positivkohle, die in Richtung der optischen Achse angeordnet ist. In Abb. 2 ist das Filter mit einer quer zur Richtung der Filterstreifen liegenden Aussparung G für den waagerechten Teil des Kohlehalters versehen. In Abb. 3 ist dargestellt, daß in der Mitte des Färb streifen s g und in der Zone der Trennungslinie zwischen den Farbstreifen b und g das Filter dem Kohlehalter entsprechendIn Fig. 2 and 3 suitable shapes of the filter and the carbon holder are shown, for example, the shape of the carbon holder being chosen such that it either only holds the filter transversely to the direction of the filter strips (Fig. 2) or parallel to the separation zone of the filter strips (Fig 3) covers. F again means the filter with the filter strips blue, green, red (Jb, g, r) and the frame R. H is the carbon holder, P is the positive carbon, which is arranged in the direction of the optical axis. In Fig. 2, the filter is provided with a recess G, which is transverse to the direction of the filter strips, for the horizontal part of the carbon holder. In Fig. 3 it is shown that in the middle of the color stripes s g and in the zone of the dividing line between the color stripes b and g, the filter corresponds to the carbon holder
*) Von dem Patentsweher sind als die Erfinder angegeben worden:*) From the patent payer, the inventors have been indicated:
Dr. John Eggert in Leipzig und Dr. Gerd Heymer in Wolfen.Dr. John Eggert in Leipzig and Dr. Gerd Heymer in Wolfen.
durchbrochen ist, und daß zu der Zone der Trennungslinie zwischen den Färb streifen r und g ein Nebenarm T des Rahmens /? angebracht ist, dessen Ausdehnung der durch den Kohlehalter// bedingten Abdeckung zwischen den Farbstreif en δ und g entspricht. Zwei weitere Seitenarme C und D des Neben-' armes Γ begrenzen die mittlere Öffnung des Filters für die Positivkohle P und das Endstück des Kohlehalters. Die im Filter bei E vorgesehene Aussparung für den Kohlehalter kann durch Asbestfasern o. dgl. abgedeckt werden, so daß kein falsches Licht hindurchtreten kann.is broken, and that to the zone of the dividing line between the dye stripes r and g a side arm T of the frame /? is attached, the extent of which corresponds to the cover caused by the carbon holder // between the colored stripes en δ and g. Two further side arms C and D of the secondary 'arm Γ limit the central opening of the filter for the positive carbon P and the end piece of the carbon holder. The recess for the carbon holder provided in the filter at E can be covered by asbestos fibers or the like so that no false light can pass through.
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI47482D DE631056C (en) | 1933-06-29 | 1933-06-29 | Lighting device with filter arrangement for the projection of lenticular films |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI47482D DE631056C (en) | 1933-06-29 | 1933-06-29 | Lighting device with filter arrangement for the projection of lenticular films |
Publications (1)
Publication Number | Publication Date |
---|---|
DE631056C true DE631056C (en) | 1936-06-11 |
Family
ID=7192007
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEI47482D Expired DE631056C (en) | 1933-06-29 | 1933-06-29 | Lighting device with filter arrangement for the projection of lenticular films |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE631056C (en) |
-
1933
- 1933-06-29 DE DEI47482D patent/DE631056C/en not_active Expired
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