A double sided screen is a screen that can show images on both sides of the screen simultaneously, using a special projector and a transparent or semi-transparent screen material. It can be used for various purposes, such as exhibitions, museums, advertising, and education. For example, you can use a double sided screen to display a 3D model or an artwork on both sides of the screen, or to show an advertisement or a message on both sides of the screen. A double sided screen can also be used to create a transparent or holographic effect, by showing images that are aligned or overlapped on both sides of the screen.