15-06-2012, 02:05 PM
FOG SCREEN
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INTRODUCTION
Inspired by science fiction movies such as Star Wars, two Finnish virtual reality researchers created the Fog Screen to recreate some of the effects from these movies in real life.
Fog Screen is an exciting new projection technology that allows to project images and video onto a screen of “dry” fog, creating the illusion that the images are floating in midair
Fog Screen is the world’s first immaterial walk-through projection screen. Its Qualities, in particular the walk-through capability, set Fog Screen apart from other displays and thus created a seemingly successful market for its products.
The Fog Screen is an innovative display technology that allows for projections on a thin layer of dry fog. Imagine the traditional pull down screen that is found in many classrooms today. Instead of a screen being pulled down from the ceiling, fog is pushed down and held in place by several small fans, allowing for a consistent surface for display.
Brief history
It was invented by two Finnish virtual reality researchers Fog Screen, which was initially known as WAVE (Walkthrough Virtual Environment), was announced in December 2001.
The first public demonstration of Fog Screen was in Finland in October 2002.Till then it is in use in different areas and improvements are being done to increase its effectiveness.
Inspired by science fiction movies such as Star Wars, two Finnish virtual reality researchers created the Fog Screen to recreate some of the effects from these movies in real life.
Fog screen is one such immaterial screen and uses the method of fog on which to project imagery (DiVerdi et al. 2006).
Fog Screen is a patented technology, which Rakkolainen, one of the senior researchers and founders behind this technology, describes as “…an immaterial projection screen that consists of air and a little humidity, and enables high-quality projected images in thin-air, as well as many new applications.”
Palovuori (2006) writes that the FogScreen creates a large non-turbulent airflow to protect a dry fog flow inside it from turbulence.
The Fog Screen debuted at the 2002 Turku Science Fair. The Fog Screen Company was founded in 2003 and volume production began in 2004.
An interactivity add-on, which lets you write “in the air” and even control a computer, debuted in 2005.
The Fog Screen One launched in 2006.
WHAT IS FOG SCREEN ?
It is one type of advanced projecting device which consumes water and electricity to form fogs on which images are projected
Here the tea-pot is projected on fog generated by a fog generating device.
Fog Screen is a patented technology, which Rakkolainen, one of the senior researchers and founders behind this technology, describes as,“…an immaterial projection screen that consists of air and a little humidity, and enables high-quality projected images in thin-air, as well as many new applications.”.
Fog Screen is an exciting new projection technology that allows you to project images and video onto a screen of “dry” fog, creating the illusion that the images are floating in midair. Fog Screen is a just that, a 2D projection screen, but not a common opaque screen like hundreds of others in the market, rather an immaterial screen. The word immaterial in relation to display systems refers to those that create that sense of imagery floating in mid-air, usually created using water, smoke or fog. Fog screen is one such immaterial screen and uses the method of fog on which to project imagery. The Fog Screen is an innovative display technology that allows for projections on a thin layer of dry fog. Imagine the traditional pull down screen that is found in many classrooms today. Instead of a screen being pulled down from the ceiling, fog is pushed down and held in place by several small fans, allowing for a consistent surface for display. A user may simply stand back and view the material but can also reach or walk through the fog. A user may also interact with objects displayed in the fog with the use of an input device like a data glove, a tracked wand, or simply using hands (see Technical Analysis). Currently, there are only nine Fog Screens available in the world. Fog Screen is an exciting new projection technology that allows you to project images and video onto a screen of “dry” fog, creating the illusion that the images are floating in midair. You can literally use the air as your user interface by touching only the air with your bare hands. The screen is created by using a suspended fog generating device with no frame around, and works with video projectors.
The fog they use is dry, so it doesn’t make you wet even if you stay under the Fog Screen device for a long time. The fog is made of ordinary water with no chemicals whatsoever. The Fog Screen is a display technology that instead of using a traditional screen uses a thin layer of dry fog as the display surface. The system starts with water that is held in a large plastic container or comes from a regular water pipe. This water is drawn through a plastic tube via a small engine. Users have the ability to control the density and flow of the fog and the strength of the sandwiching airstreams.
With two projectors, we can project different images on both sides of the screen. The Fog Screen is a new invention which makes objects seems to appear and move in thin air! It is a screen you can walk through! The Fog Screen is created by using a suspended fog
generating device; there is no frame around the screen. The installation is easy: just replace the conventional screen with Fog Screen. We don’t need to change anything else – it works with standard video projectors. The fog we are using is dry, so it doesn’t make you wet even if you stay under the Fog Screen device for a long time. The fog is made of ordinary water with no chemicals whatsoever. With two projectors, you can project different images on both sides of the screen crisp, and protected from turbulence. . All the important principles of Fog Screen technology have patent
pending. The basic components of the screen are a laminar, on-turbulent airflow, and a thin fog screen created this way, the fog screen is an internal part of the laminar airflow, and remains thin and turbulence.
Under the Surface
As already mentioned, the screen is made up of a layer of fog. It is therefore quite unique that such a substance could allow for clear and undisturbed image projection. The secret lies in how this layer of fog in maintained. Palovuori (2006) writes that the Fog Screen creates a large non-turbulent airflow to protect a dry fog flow inside it from turbulence (see Figure 1). The outer airflow may get slightly turbulent, but the inner fog layer remains thin and crisp. In a sense, the outer air-flows are like air curtains that sandwich the fog flow and maintain its integrity.