SU14447A1 - Device for making stereoscopic cinematic films - Google Patents

Description

The present invention aims to produce stereoscopic cinematographic films by means of two negative films shot by two separate or one dual apparatus and in which the images are alternated with opaque gaps equal in size to the frames and employees used to separate two negative films in the middle of one positive one.

In the schematic drawing of FIG. 1 is a front view of the camera; FIG. 2 is a horizontal section of the apparatus along a line passing through the center of the lenses; FIG. 3 is a vertical section of the apparatus along a line passing through the center of one of the lenses; FIG. 4 and 4 negative films.

The shooting is carried out on two separate films I and II (for the right and left images) by means of two devices (or one dual device) having lenses 1, 2, additional optical elements 3, 4 and shutters 5, 5 (Fig. 1, 2 and 3). Frosted or simple glasses, scattering lenses, etc. can serve as additional optical elements. Each opening of the shutters 5 corresponds to the advancement of negative films I, II by two frames.

only one of them is exposed. Thus, on each film negative images Ij, I2, Is - and III, 11-2, Pz. are separated from each other by clean spaces 6 (Fig. 4). These gaps at the time of exposure of adjacent frames are uniformly illuminated using additional optical elements 3, 4 (Fig. 1 and 3); at the time of the advancement of the films I, P, the optical elements 3, 4 are covered with shutters 5, 5 (or separate shutters). Due to this, on each film, after its appearance, a number of negative images are obtained, separated by opaque gaps 6 (Fig. 4), the magnitude of which is equal to the size of the frames. Shooting can also be done by ordinary surveyors, without additional optical elements 3, 4, but adjusted so that, as in the previous case, each opening of the shutters corresponded to the advancement of negative films by two frames from which only one was exposed. In this case, the space between the negative frames is blackened after the shooting: either by hand (filling, shading) after the film is displayed, or before the film is displayed in an ordinary copier or the like, so that only the gaps are illuminated. 6 between frames, but not the most frames. This can be achieved, for example, by using special shutters. The resulting negative films are copied into one positive film in the usual order, but separately: first one negative film is copied, and then the frames of the second film are imprinted on the free intervals between frames. A series of alternating left and right images are placed in the middle of the film and giving a stereoscopic effect when designing on the screen. The subject of the patent. 1. An apparatus for making stereoscopic; cinematographic films by means of two separate or one dual imaging apparatus and one projection film, through which a positive film is passed, obtained by copying two separate negative films onto its center, characterized by the fact that both filming apparatus 1 and 2 are equipped with additional optical elements 3 and 4 to obtain separate negative films I and P promoted at once by two frames for right and left images of opaque gaps b and b, equal in size to frames, which gaps They are used to separately copy negative films to positive ones. 2. Accepting the production of stereoscopic cinematographic films using the device described in paragraph 1, characterized in that the resulting gaps between frames on a negative film are blackened (painted over, concealed) by the hand after the film is shown or blackened before the appearance, exposing them the action of light in an ordinary copying machine or the like.

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