Image projected on the back surface of a screen placed between the viewer and the projector.
A projection system where the projector is behind the screen.
Projection on to an opaque screen, with the projector placed behind the screen, invisible to the audience. A wide choice of rigid and flexible screen materials are available - plus a range of folding, portable rear-projection screens. As the image is not 'reflected' off the screen surface, but viewed through the screen, images are subjectively much brighter than those from front-projected screens. Where space behind the screen is limited, a projector with a short throw lens can installed. In very confined areas, a surface-silvered mirror can be used to artificially increase the projection distance.
The projector is placed behind an opaque screen, so that it is invisible to the audience. The image is projected onto the screen and seen by the audience on the other side. As the projector does not block the view of anyone in the audience, it can be placed at the ideal height. Therefore keystoning is not an issue and the problem of lack of space behind the screen is solved by the use of a projector with a short throw lens. Some mid-room projectors have third party short throw lenses. As the image is projected through the screen, the image must be reversed but good rear projection screens can produce brighter images than some standard screens.
Using an opaque screen, the projector is placed behind the screen, invisible to the audience. It projects onto the screen and the audience sees it on the other side. Good rear projection screens actually produce brighter images than some standard screens. So as not to waste space behind the screen, ideally a projector with a short throw lens is used. Since the projector can be placed even with the middle of the screen, without blocking anyone's view, keystoning is not a problem. Some mid-room projectors like the Epson have available 3rd party short throw lenses. Since the image is projected through the screen, the image must be reversed.
Presentation method in which the image is projected through a translucent screen toward the audience.
Using an opaque screen, the projector is placed behind the screen, invisible to the audience. The image projects onto the screen which the audience sees on the other side. Good rear projection screens actually produce brighter images than some standard screens. A projector with a short throw lens is typically used to accommodate the lack of space behind the screen. Since the projector can be placed at the ideal height, without blocking anyone's view, key stoning is not a problem. Since the image is projected through the screen, the image must be reversed.
The projector is placed behind a translucent glass or plastic screen, out of sight of the audience. It projects onto the back screen and the audience sees on the front. Some large screen projection monitors use rear screen projection.
A projector and screen are set up behind the frontal action so as to give the illusions that there are moving images in the background. Commonly used in scenes where a couple is sitting in a stationary car while the viewer sees the street and moving traffic behind them. Some computer-generated images have now replaced this method. See films such as "Star Wars" and "Superman" where Matte shots are used. Using sophisticated computers generated images and illusionistic methods to create a sense of reality.
Locating the projector behind a translucent screen to be viewed from the front.
