SU33714A1 - Clear mirror - Google Patents

Description

In light engineering, there are cases when it is required to see a certain object through the glass and at the same time to see an image of another object on the same glass. Such applications of glass are known in theatrical technique, for example, in the production of the phenomenon of living ghosts, where glasses play the role of flat mirrors, reflecting the rays falling on them with their polished side. All images obtained in this way are pale due to the reflection of only a part of the rays, since the other part of the rays from the light falling on the glass also penetrates through their mass due to the transparency of the glasses.

By the proposed transparent mirror, it is intended to enhance the effect of the resulting images.

In FIG. 1 shows a transparent mirror in schematic form; FIG. 2 is the same in another version; FIG. 3 is the same during operation and FIG. 4 is the same for imaging in air through reflection i from a concave mirror. |

Clear mirror / cover I mirror amalgam in the form of a row j. Parallel or figured mirror | lines or strips 2 of varying widths I, between which the transparent remains (282)

those that are not covered by amalgam are superfluous or strip 3 of the same width. The drive such a mirror raster in a fast reciprocating motion, the amplitude of which must be equal to the width of the mirror strip 2 or a value multiple of the width of this width, receive a more intense image than ordinary glasses give, and the viewer will also see the image through transparent-without amalgam - parts of the glass located behind the glass itself (Fig. 3).

The shape of the mirror strips (raster) on the glass may be different; FIG. 2 mirror strips 2 are applied in the form of a spiral on a circular rotating disk 4. In the process of rotating such a glass disk, at each given point on its surface, the successive overlapping of the transparent spiral strip 4 by a mirror stripe 2.

To obtain images in air, a concave mirror / is provided, equipped with a hole 5. Against this mirror, between its focus F and the center of curvature O is placed a plate 6 of some transparent substance (for example, glass), on which bright opaque strips 9 are applied, capable of Vat light projection like screens. Such shielding strips can be made, for example, with whitewash, pearl paint, matte (mirror) amalgam, etc. In front of the hole 5 behind the mirror / there is an apparatus 5 for Light design, such as a film projector. A plate 7 (raster) is placed in the space between the lens of this projector and the image to be projected. It is made of some transparent substance on which opaque strips 8 are applied. The location of these strips, their width should be in proportional ratios and the width of the strips 9 on the plate b, but in such a way that against the opaque strips 9 on the plate 5 there are transparent strips of the plate 7. This creates the condition that the projected I images fall exactly on The screening stripes of the plate b, not giving any beams of light to the transparent places of this plate, which is achieved by the presence of dark (opaque) stripes tta raster 7, i.e. the stripes 8, covering the image. Such a combination should be constructed so that the strips that are designed on the plate b are exactly the same in size and along the width with the bands (shielding) of the plate 6.

In the process of design by the apparatus 5, plates 7 and b are brought into synchronous vertical or horizontal, viewed on the arrangement of the stripes of rasters, reciprocating, in which the strips 9 of the plate b merge with the transparent stripes of this screen, forming a plane capable of perceiving projector 5.

The image obtained on such a plate b sends its rays to the mirror /, which, reflecting from the latter, is due to its position.

This image is made visible at point 3 (Fig. 4), which is magnified and valid. The presence of transparent bands 9 on the screen makes it possible to penetrate the rays from the mirror. The presence of dark stripes on the plate 6. stops the access of the rays so that they are not visible to the audience through the transparent strips of the plate b.

The subject matter of the invention. .

Claims (3)

1. A transparent mirror characterized by the use of a transparent surface brought into reciprocating or oscillating motion, for example, glass with a series of mirror reflecting strips 2 on it alternating with transparent strips 3 of the same width (Fig. 1). 2. Mirror change according to claim 1, characterized in that the mirror strips 2 are applied in the form of a spiral on a rotatable disk 4 of transparent material (Fig. 2). 3. The use of a transparent mirror according to claim 1 in a device for obtaining images in air by means of reflection from a concave mirror, which means that a translucent plate is placed in front of mirror 7 with a central hole 5 over distances larger than the main focal length and smaller mirror radius b, serving to reflect on a concave mirror / rays, - coming from a projection device placed against the opening 5 in the mirror, equipped with a raster plate 7 with transparent and opaque stripes, set so that the transparent strips of the plate b were designed as opaque strips 7, and, when designing the images, the screen 6 and the raster plate 7 should be brought into synchronous reciprocating motion. Shng ..