FR2739698A1 - Cinema projection system providing three=dimensional image without special glasses - Google Patents

Abstract

The projection system includes printing two identical images together, and linking them in a solid mechanical manner. The two images are taken from different angles with a stereoscopic camera, which itself is provided with one optical guide, and the other objective having traditional equipment. Using a single camera window, it is possible to project two superimposed images, allowing production of an image in relief. A standard 35 mm or 70mm projector may be used for the projection.

Description

To be able to make cinema in relief, which allows the projection a direct vision on a screen by the public, of this relief.

The BELLONY system prints two identical and mechanically united images, taken from different angles, with a stereoscopic camera.

5 But on a single shooting window, on the two faces of the support, which makes it possible to have two superimposed images, therefore, at projection, an image in relief.

 We have to work on several parameters.

a) The fint
The Millar film, the thickness of which must be as thin as possible, so that the smallest difference between the two photos remains, since, unlike the standard film, it must be coated with photographic emulsion on both sides.

This thickness will also take into account the mechanical strength of the film.

b) The Peel.

A complementary film in Millar, (which we will call frostbite for convenience of language) must be added after the shooting in order to cover the emulsion when the support coils on the receiving nucleus, to protect the emulsion which comes to be sensitized.

This peel can be issued by an independent store located on the camera, and resumed so as to be brought into contact with the winding support.

It can be put from the manufacture of the film in contact therewith but, if the peel 20 has defects they will be visible on projection, since the shot will be taken through this peel on the emulsion.

This frostbite is only useful for shooting
It must be removed for film development operations.

However with the protective devices on the flat d de Talenteni pernaflent 25 11 it is preferable to reintroduce the peel into the projection system to protect the emulsion from deposits that form in the film path, the projection corridor, and at the level of the Maltese cross.

To do this, it can be made integral with the film by bonding or welding at the perforations. Or he can undergo a Teflon treatment.

30 The only devices that can project this film without media protection are of the continuous film storage cabinet type designed for studios and fairground attractions.

c) The elbow in ootial fiber.

The fiber optic bend can be made with fiber, glass, or plastic, but of course it is preferable for transparency reasons to use silica fibers.

 It is equipped with its two exterminated lenses which serve to hold the fibers in place and provides the assembly with rigidity and mechanical flexibility.

The lenses are the last two of the objective so as to better focus on the emulsion.

It is also possible not to introduce the lenses for mounting the objective, and to make only an optical bend closed at its two ends by a neutral glass.

The two ends of the optical duct must be perfectly screwed 10 The ontial duct.

To be functional it must be placed behind the lens or there is no film, for practical reasons, it is better to put it behind the right optical equipment.

It is compulsory to make a U-turn with the optical conduit, for this reason it must be long enough to allow this U-turn, without mechanical constraints.

15 In case the assembly is done with the objective lenses it would be good to make an afocal assembly.

Right for memory right eye.

 The double shutter svnchrone.

I
The synchronous double shutter is necessary because there are two photos on the emulsions one at the front, and one at the rear.

 d) The shooting camera.

The camera is stereoscopic, double optical and double shutter type, but behind one of the lenses a fiber optic elbow brings the image towards the back of the film via a mirror. which is on the level of the shooting window located on the left, to print 25 duplex, the film previously prepared for this use.

The other settings to be able to make the two optics coincide remain the same as for stereoscopic shooting.

The development of this film remains the same as conventional development and does not require special machines. is classic 35 or 70 mm without D preaar'atwn D <wttcuhàr
But the 70 mm is recommended

Claims (3)

Claims  10 Cinema in relief in direct vision without polarized glasses The present invention relates to a device for making cinema in relief, which allows projection, direct vision without polarized glasses, in a large room, on a large screen. S It is characterized by the fact that an ordinary 35 or 70 mm standard füm projector is required to project it. 20 The peel. A complementary film in Millar, must be added after the shooting in order to cover the emulsion when the support coils on the receiving core, to protect the emulsion which has just been sensitized. This peel can be issued by an independent store located on the shooting camera, and resumed so as to be brought into contact with the winding support. It can be put from the manufacture of the film in contact therewith but, if the peel has defects they will be visible on projection, since the shot will be taken through this peel on the emulsion.  30 The gothic fiber image return elbow and its mirror. To be functional it must be placed behind the lens or there is no film, for practical reasons, it is better to put it behind the right optical equipment. It is compulsory to make a U-turn with the optical conduit, for this reason it must be long enough to allow this U-turn, without mechanical constraints The fiber optic elbow brings the image towards the back of the film via a mirror, which is level with the shooting window located on the left, to print on both sides, the film previously prepared for this use.  40 Double-sided emulsion film 25 Millar film, the thickness of which should be as thin as possible, so that the smallest gap between the two photos remains, because unlike standard film, it must be photographic emulsion on both sides. This thickness will also take into account the mechanical strength of the film.  50 Double shutter svnckrone of a double-sided emulsion film on a single window 30 A double shutter is provided for shooting, to be able to operate on both sides of the film which takes a view of the same duplex image.