Showing posts with label transparency. Show all posts
Showing posts with label transparency. Show all posts

Monday, April 14, 2014

Land Rover: Invisible bonnet / car hood - Video



Land Rover has released a video demonstrating a part of its Discover Vision Concept, the invisible "bonnet" or as it's known in the U.S. the "hood" of the car.

It's a concept the automaker is planning to show off at the New York International Auto Show later this month.

The invisible or transparent bonnet is just what it sounds like, or nearly so.

It's where the hood, the engine and frame are all made to appear as if nearly transparent as a driver scoots on down the road.

That means the driver can actually see the front wheels and the terrain over which they are traversing.

The whole point is to give the driver a more immersive experience as they travel, presumably off-road over terrain that requires a lot more navigating than the average road, though the same technology could possibly assist drivers in averting pot-holes in city streets.

Allowing the driver to see the front wheels lets them note which direction they are turned, offering more perspective and perhaps more time to react.

The invisible bonnet comes about courtesy of cameras mounted in the grill and beneath the vehicle.

They capture what is going on in real time below and just in front of the vehicle and send it to a display device that splashes the imagery across the windshield (in heads-up fashion).

The result is an eerie feeling of floating as the car moves forward, allowing for a much better view of what is actually transpiring just ahead and below.

The invisible bonnet would be of particularly good use in a Land Rover, as they are notorious for having too much obstruction up front.

Wednesday, March 27, 2013

Metascreen: Metamaterial research into light transparency

Researchers have now developed a cloak that is just micrometers thick and can hide three-dimensional objects from microwaves in their natural environment, in all directions and from all of the observers’ positions. 

Credit: Image courtesy of Institute of Physics

Their research, which has so far produced an ultralow profile cloak designed for "scattering suppression of a finite-length rod in free space", has been published in the New Journal of Physics.

Presenting their study today, 26 March, in the Institute of Physics and German Physical Society's New Journal of Physics, the researchers, from the University of Texas at Austin, have used a new, ultra-thin layer called a "metascreen."

The cloak is made of a new kind of material called a metascreen, made up of strips of copper tape attached to a flexible polycarbonate film.

Andrea Alu
The copper strips are only 66 micrometres thick and the polycarbonate film is 100 micrometres thick, and the two combined make a diagonal fishnet pattern.

It works by scattering and cancelling out incoming waves, and the researchers were able to use the cloak to shield an 18 centimetre-tall cylindrical rod from microwaves.

"When the scattered fields from the cloak and the object interfere, they cancel each other out and the overall effect is transparency and invisibility at all angles of observation," said Andrea Alu, one of the physicists.

Journal Reference: 
J C Soric, P Y Chen, A Kerkhoff, D Rainwater, K Melin, A Al. Demonstration of an ultralow profile cloak for scattering suppression of a finite-length rod in free space. New Journal of Physics, 2013; 15 (3): 033037 DOI: 10.1088/1367-2630/15/3/033037