A so-called rear projection screen consists of a special translucent fabric onto which a projector can project from behind. A rear projection screen can help you with 2 problems:
1. You're projecting in a very bright environment:
If, for example, you try to set up a screen in the garden to watch the football World Cup with friends, there is usually stray light on the screen from house walls or direct sunlight. With front projection you don't stand a chance. With a rear projection screen, on the other hand, you can darken the light path behind the screen with fabric so that no stray light reaches the screen.
2. There isn't enough space.
At trade fairs or on stages, there's rarely much space at the front, because that's where the audience is. If you try to project from a long distance with a projector, you need very large lenses, which are usually very expensive. A rear projection screen is an alternative here. With a short-throw projector and a frame-tensioned rear projection screen, you can achieve a 500 cm wide image from a distance of 250 cm. In addition, the projector doesn't cast any shadows when placed behind the screen.
