How to properly organize the technical side of the presentation

Slides are usually shown on numerous small screens in a darkened room. The screens should be educational, then you can place slide projectors in specially equipped screens with windows for the rays.
The number of screens should be the maximum possible for the room, but not less than 10-15. The exposition of the author (team of authors) is projected simultaneously on all screens at once.

The slide change interval depends on the number of screens and the audience's attention and is approximately 5-10 minutes.

The principles of building an exhibition are similar to the principles of creating a video sequence of slide films. Since the images are placed on different screens, for example, it is acceptable to alternate vertical and horizontal frames, frames with different colors. During exhibitions, it is advisable to use calm, non-distracting music that compensates for the noise of the projectors and creates a favorable atmosphere for viewing the exhibition.

Special attention should be paid to the demonstration of stereoscopic images, which give the illusion of volume and space to the location of the captured objects.

The polarizing method has become the most widespread. In this case, 2 slide projectors are used, projecting the image on the same screens. Polarizing filters are installed on the lenses, the axes of polarization of which are mutually perpendicular. Viewing is done through glasses with similarly installed filters. Two images are projected onto the screen, but each eye sees only one of them, for which the axes of polarization of the filter on the projector lens and in glasses are parallel.

The screen must be metallized so that the reflection does not disrupt the polarization of the light from the projectors. To do this, you can cover a flat surface with aluminum powder paint. The reflection coefficient of metallized screens is lower than that of conventional screens. In addition, polarizing filters reduce the brightness several times. Therefore, slide projectors do not make it possible to enlarge the image on a screen larger than 1 -1.5 meters. A good combination of images along the vertical axis is also important.

A stereoscopic image is also obtained using the color anaglyph method, in which two initial black-and-white images of the same object are colored red and blue (subtractive method) or projected through red and blue light filters (additive method).

With the subtractive demonstration method, one slide projector is sufficient. Viewing can also be done through glasses in which a red light filter is intended for the left eye, and a blue—blue filter for the right eye (the filters should be light and slightly contrasting). The main disadvantage of these methods is that they do not convey color (the final image is monochrome). Les promotions d’inscription sont conçues pour offrir un avantage immédiat aux nouveaux joueurs et leur permettre d’explorer les options disponibles avec plus de liberté. Ces offres ne sont généralement accessibles qu’une seule fois. En saisissant un code promo 1xbet cote d'ivoire pendant l’enregistrement, l’utilisateur peut recevoir un bonus 100% jusqu’à 130 €, ce qui double son premier dépôt et améliore ses chances de jeu.