DE3211231A1 - Photographic camera - Google Patents

Abstract

The object of the invention is to provide a camera which has properties corresponding to a reflex camera and is more simply constructed. This is achieved when a shutter is arranged in front of and behind the film in each case, and when, in a first position, which depends on the state of the film, the two shutters release the beam path and in a second position they both lie in the beam path. The film used must be designed such that a light-sensitive piece of film and a light-transmitting piece of film, which preferably is provided with a cutout, follow one another alternatively. Thus, by means of an appropriate control of the shutters in a manner synchronised with respect to the film state, all the previous requirements of a reflex camera are fulfilled. The advantages of this new arrangement and taking technique consist, owing to the elimination of prism and mirror, in a substantial saving in weight and space. Since only shutter or film movements are performed and there are no movements of large masses as previously due to the mirror of the reflex camera, it is possible to take quicker sequences of pictures in a manner freer from vibrations and with less noise than heretofore. <IMAGE>

Description

Photo camera

The invention relates to a photo camera with shutter and Viewfinder.

Today's single-lens reflex camera ensures through lenses and direct Light path for optimal exposure of the film material. When selecting the image section the human eye must be distorted in the viewfinder with one through the mirror, reduced and often not identical image detail. Also requires the mirror an increased technical effort. As a result of the complicated mechanics no quick image sequences are possible.

The object of the invention is to provide a reflex camera in the Properties to create corresponding camera that are more simply constructed and lighter is to be handled. according to the invention this is achieved in that in front of and behind the film is each a shutter (8,9) is arranged, and that in a first, from the film stand Depending on the position, both locks (8, 9) release the beam path and in one second position both lie in the beam path.

In this way you can work without a mirror and that The visible image corresponds completely to that recorded later on the film.

The invention also relates to a photo camera with a shutter and Viewfinder, as well as an inserted film, which are characterized in that the Film consecutively areas with no photosensitive material (l) and areas with photosensitive material (2) has that before and behind the film is arranged a shutter (8,9) that both shutters (8,9) removed or are open and allow the passage of light if there is a Cutout (1) is located and that both closures (8,9) are in the beam path or are closed when there is a piece of light-sensitive film (2) there.

The invention also relates to a film for a photo camera, which characterized in that a light-sensitive film piece (2) and a light-permeable, film piece (1) preferably provided with a cutout alternately on top of one another follow.

Further developments of the invention are given in the subclaims. The invention is explained below on found of drawings wall in which an embodiment is dargertellt.

In Figure 1, a film strip is shown, the window (excerpts) 1 and exposed (light-sensitive) film pieces 2 in between, which are shown in dashed lines are shown. The window 1 and the film pieces 2 are chosen to be approximately the same size, possibly with a small edge zone in the transition area.

In Figure 2, the essential parts are in a schematic representation the camera according to the invention shown.

An objective 3 is provided, behind which the film with the cutout 1, the film being housed in a conventional film cassette 4. The image of the The object to be captured (viewfinder image) is displayed on a ground glass 5, which is followed by a viewfinder 6. The passage of light through the elements 3,1,5 and 6 is straight, i.e. it is not a mirror system like a single-lens reflex camera necessary.

A motor 7 or a manually operated one can be used to transport the film Drive mechanism may be provided. The film is covered by a frame, which has a section corresponding to the size of the image.

At the end of the search process, i.e. before the film is transported A shutter 8 and 9 are placed in front of and behind the film in the recording position inserted (Figure 2), which shield the film material from the incoming drawing. The film is then transported so far that light-sensitive material 2 enters the receiving opening (Figure 3). ? When you press the shutter button, Normally, by opening the shutter 8, the incidence of light for the desired Time released.

The light-tight insertion of the closures 8 and 9 (Figure 3), the Transport of the film into the recording position (Figure 4), opening of the shutter 8 (Figure 5) and exposure, the renewed closing of the shutter 8 (Figure 6) and the end of the exposure including the transport (Figure 7) of the exposed film piece in the upper part of the light-tight film cassette 4 can also take place automatically.

In Figure 8, a state analogous to Figure 2 is reached and the Shutters 8 and 9 can be removed to open the viewfinder for the image detail to release.

The camera is ready for the next exposure. This step too can still be done automatically.

The advantages of this new arrangement and recording technology exist once by eliminating the prism and mirror, a considerable saving in weight and space. Since only shutter or film movements take place and no large mass movements as before through the mirror of the reflex camera, the image sequences are faster Less shock and noise than previously possible.

Instead of punched cutouts 1, continuous, unperforated Film strips can be used when the substrate itself is translucent.

8 claims 8 figures Blank page

Claims (8)

P a t e n t a n 8 p r i c h e 1. Photo camera with shutter and viewfinder, characterized in that a shutter 8.9 is arranged in front of and behind the film is, and that in a first position dependent on the film level, both shutters 8,9 release the beam path and in a second position both in the beam path lie. 2. Photo camera according to claim 1, characterized in that in the beam path a focusing screen 5 lies. 3. Photo camera according to one of the preceding claims, characterized in that that the beam path runs in a straight line. 4. Photo camera according to one of claims 2 and 3, characterized in that that the image appearing on the focusing screen 5 is the size of the recorded image is equivalent to. 5. Photo camera according to one of the preceding claims, characterized in that that the position of the closures 8,9 and the FiDnstellung synchronously and by a common, preferably motor-operated drive are controlled. 6. Photo camera in particular according to one of the preceding claims with shutter and viewfinder, as well as an inserted film, characterized in that that the film successively areas without photosensitive material 1 and Areas with photosensitive material 2 has that in front of and behind the film A closure 8.9 is arranged in each case, that both closures 8.9 removed or are open and allow the passage of light when in the beam path Section 1 is located and that both shutters 8, 9 are in the beam path or are closed when there is a photosensitive film piece 2 there. 7. Film for a photo camera according to one of the preceding claims, characterized in that a photosensitive film piece 2 and a light transmissive, preferably provided with a cutout film piece 1 alternately on top of one another follow. 8. Film according to claim 7, characterized in that the carrier material is designed to be translucent.