A projector It is a machine that is used for projection of images . According to the type of images to be shown, the device has different characteristics.
He film projector it is a team formed by mechanical and optical elements that allow to project a film in a screen . What this projector does is emit a beam of light that a lens is responsible for increasing and inverting before its arrival to the frames of the film. With this process, the resulting images are then focused on the screen.
It is important to keep in mind that this kind of projector was designed at the end of XIX century for the brothers Auguste and Louis Lumiere . Currently, digital film projectors are also available which, as the name suggests, generate the image digitally, without resorting to a movie .
Is called video projector , on the other hand, to the optical device that, upon receiving a video signal, can project the corresponding images thanks to a lens system. Used in conferences, congresses and classes, video projectors can obtain the input signal of a computer (computer) or a TV tuner, for example.
A slide projector , meanwhile, it houses a mechanism for displaying images that are projected onto a wall or other smooth surface. It should be remembered that a slide It is a positive photograph taken in a transparent material, such as glass.
It can be called light projector finally at electric bulb . This lamp which is characterized by its power is concentrated in one direction, illuminating a particular area.