Two-way mirror
A divider mirror (or semi-transparent mirror ) is a mirror which reflects a portion of incident light and transmits the other part. For this is related to the one-way mirror.
It usually consists of a dielectric layer system on one side, and possibly derived from an anti-reflective coating on the other side (to avoid double vision ). Instead of the dielectric layer system can for example also be used a very thin metal coating.
Will use this method for neutral and low-absorption separation of the light in lasers, optical metrology or in television technical applications (eg teleprompter ).
Display and Einblendsysteme
Were in the TV area and such splitting mirror often used as an easy way to implement with relatively limited cost trick effects. In this case, an upward screen on an inclined mirror surface is directed, who heads the TV picture to be a camera or viewer. The image on the screen is dark in essence. On the horizontally extending main axis of the viewer finds himself behind the mirror usually a miniaturized scenery through which the bright parts of the screen are almost blinded them. In presentations before an audience, the result acts as if a flat image would stand freely in the space behind the mirror. If the object is not particularly large, usually not noticeable aware that it is merely a shallow play in a 3D scene.
Using a variant of this structure sat Ridley Scott for the film Blade Runner the normally unwanted red-eye effect specifically in order to bring the pupils of the actors to shine. The camera filmed it through a semi- transparent mirror through which directed the light from a side-mounted lamp into the eyes of the actor. This lamp was adjustable in brightness, and because of this effect were sufficient low light intensities, the recorded image was not lightened unnecessary.
In a very large version of the arrangement an artist has used this methodology to make for the Danish Design Centre, a two-sided viewable video illusion, which is built around a real but empty dining table in an elongated shape around. After a random pattern here meals are visible and disappear, such as apples that are conjured up on a plate, or milk flowing from an invisible pot in one of the glasses. In addition to various oversized emerging in space fruit there is still a life-sized, moving house pig in concept. The arrangement implies that here, the mirrors are arranged such that the screens or, alternatively, the projection area of the projection is arranged above the sought viewer height. The same applies to pyramid-like device for presentation of the manufacturer included to the project Real Fiction. A manufacturer named Cheoptics contrast, the pyramid on its head and makes his presentations thereby accessible from all sides. There you will find a few more roughly comparable systems on the market that are there like offered under the not entirely correct category name " Holographic Display". True holographic screens are known for a flat image, but the actual picture provide by fine lenses pretty close parallel to the optically active element dar.
More recently, very large-sized mirror systems have been implemented on the basis of special films themselves. Here, a considerable space requirement between audience and stage is required. The special effect of this is that one man can seemingly unite on a stage next to each other, part of which is real in the room while the other part on a mostly digital playback may at the other end of the world could be and will be filmed there. The image is usually thrown with one or more projectors on a canvas surface on the ground in the area of so-called orchestra pit. As an aside, it is even possible to play on the overlying surface information of a teleprompter, which can then be read by the persons actually present at the stage. As a minor limitation is that the image of the displayed people will slowly deteriorate usually occur on the soles of the feet. Furthermore, a more or less sharp termination of the display is also connected to the sides of the platform to be expected. According to reports, the method is in strong air movements, such as loud music, then lead to a more moderate, mostly blurred image.
The method is currently being used sporadically in public, for example, on fashion shows. Also the possibility to use it without an assigned real image and instead to let the whole scene from real film and other visual material produce in a computer system is sometimes practiced. The concert goers so an empty stage is presented here, which is only filled by playing or importing video footage of the action.