SU34931A1 - Continuous Movie Projector and Optical Alignment - Google Patents

Description

In the author's certificate number 12347. describes a continuous film film projector, in which a disk co is used as a leveling body; stepped mirrors on it.

This invention is a modification of the above projector and consists in replacing a disk with two cylinders, the inner mirror surface of which is formed in a spiral.

In FIG. 1 shows a beam path in the projector’s optical system; FIG. 2 is a side view of the projector.

The projector consists of an optical system and a fur; an anima that tells the film continuous movement in a {lock / double-height window). For alignment of the image on the screen, two cylinders 4 and 5 located on inclined axes located between condensers 2 and lens 5 are used. The internal mirror surfaces of the cylinders are formed in a spiral; To reinforce the cylinders on their axes, flat-parallel glass discs d with a sleeve in the center were used. Cylinder 4 axis

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and 5 are brought into synchronous rotation from the engine 7, to which they are connected by means of a flexible 1M metallic tape 8 with perforations captured by the teeth of the drums 9, which sit on the axles. The whole system is fixed on the frame JO, which can be given the required inclination by means of a gear segment / 7.

The film is drawn at a constant speed, and the frame, the passage in front of the double height window, is illuminated by a beam of rays qr of the lamp J2, which continuously follows it due to the displacement of the reflecting surface of cylinder 4.

The compensation of the movement of the light beam and the frame is achieved by mixing the reflective surface of cylinder 5. The limiting positions of these surfaces are: the initial solid line, the final dotted line. To correct (transform) the image on the screen / 5, the latter is set at a certain angle to the beam (Fig. 1). , The inventor points to the possibility of replacing the described reflecting surfaces by a number of conical mirrors.