Japanese researchers have found a technique to create full-colour holograms and the discovery could transform 3D television and movies.
Unfortunately, it’ll be a few years before you can view a 3D film without glasses as this apple is just two centimetres across.
Full-colour hologram: This 3D apple was created using electronic wave technology and remains
the same colour, no matter how you look at it.
Even so, the hologram is one of a kind, with ordinary white light used rather than lasers to create an image that doesn’t change colour when you move your head.
In a paper published in the new issue of the Science journal, Osaka University’s Satoshi Kawata explained how his team used electronic waves caused ‘surface plasmons’ to create this remarkable image of an apple.
The researchers made a holographic depiction of the fruit onto a thin sheet of photoresistic material then rested the sheet onto a glass plate.
After a corrugated layer of silver was attached to the photoresistic sheet – to help guide waves of light – a halogen light was shone onto the back of the glass plate.
Different plasmons in the metal film are then ‘excited’ by the incoming light depending on its angle and emit specific colours in response.
‘So even if you’re given white light, only one color is chosen by the plasmon,’ Mr Katawa explained.
The hologram is created on thin photoresist material laid on a glass plateThe virtual image of the apple is then created in three dimensions and full colour above the glass plate and remains apple-coloured whatever the angle of the viewer’s eyes.
The technology is simple enough that it could be used to create 3D imagery that doesn’t require special glasses or a specific viewing angle.
‘No one has thought to use plasmons for display applications, so it was fun for me,’ Mr Katana added.
‘I just wanted to demonstrate that this could be done. But I hope people would be interested in thinking seriously to use this technology for larger scale 3-D virtual display.’(dailymail.co.uk)