Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Holograms set for greatness

A new technique that combines optical plates to manipulate laser light improves the quality of holograms

Holography makes use of the peculiar properties of laser light to record and later recreate three-dimensional images, adding depth to conventionally flat pictures.

A scanning mirror (right) redirects green laser light onto a tiled holographic plate (top) to produce high-quality three-dimensional images.
Copyright : 2013 A*STAR Data Storage Institute

Zhi Ming Abel Lum and co©workers at the A*STAR Data Storage Institute, Singapore, have now developed a method for increasing the number of pixels that constitute a hologram, thus enabling larger and more realistic three-dimensional images1.

Holographic imaging works by passing a laser beam through a plate on which an encoded pattern, known as a hologram, is stored or recorded. The laser light scatters from features on the plate in a way that gives the impression of a real three-dimensional object. With the help of a scanning mirror, the system built by Lum and his co-workers combines 24 of these plates to generate a hologram consisting of 377.5 million pixels. A previous approach by a different team only managed to achieve approximately 100 million pixels.

The researchers patterned the plates, made of a liquid-crystal material on a silicon substrate, with a computer-generated hologram. Conventionally, holograms are recorded by scattering a laser beam off a real object. ¡°Holograms can also be mathematically calculated,¡± explains Lum. ¡°This avoids problems, such as vibrations, associated with the conventional recording method that may reduce the quality of the final reconstructed image.¡±

Each plate, also called a spatial light modulator (SLM), consisted of an array of 1,280 by 1,024 pixels ¡ª 1.3 million in total. Simply stacking the plates to increase the total number of pixels, however, created ¡®optical gaps¡¯ between them. As a workaround, the researchers tiled 24 SLMs into an 8 by 3 array on two perpendicular mounting plates separated by an optical beam splitter. They then utilized a scanning mirror to direct the laser light from the combined SLM array to several predetermined positions, just as if they had all been stacked seamlessly together (see image).

The team demonstrated that by shining green laser light onto this composite holographic plate, they could create three-dimensional objects that replayed at a rate of 60 frames per second in a 10 by 3-inch (25 by 7.5-centimeter) display window.

This relatively simple approach for increasing the pixel count of holograms should help researchers develop three-dimensional holographic displays that are much more realistic than those commercially available at present. ¡°Our next step is to improve this ¡®tiling¡¯ approach to further scale up the number of pixels of the hologram, which will lead to a larger holographic image,¡± says Lum.

Journal information

Lum, Z. M. A., Liang, X. A., Pan, Y. C., Zheng, R. T. & Xu, X. W. Increasing pixel count of holograms for three-dimensional holographic display by optical scan-tiling. Optical Engineering 52, 015802 (2013).

A*STAR Research | Research asia research news
Further information:

More articles from Physics and Astronomy:

nachricht Move over, lasers: Scientists can now create holograms from neutrons, too
21.10.2016 | National Institute of Standards and Technology (NIST)

nachricht Finding the lightest superdeformed triaxial atomic nucleus
20.10.2016 | The Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

Im Focus: New Products - Highlights of COMPAMED 2016

COMPAMED has become the leading international marketplace for suppliers of medical manufacturing. The trade fair, which takes place every November and is co-located to MEDICA in Dusseldorf, has been steadily growing over the past years and shows that medical technology remains a rapidly growing market.

In 2016, the joint pavilion by the IVAM Microtechnology Network, the Product Market “High-tech for Medical Devices”, will be located in Hall 8a again and will...

Im Focus: Ultra-thin ferroelectric material for next-generation electronics

'Ferroelectric' materials can switch between different states of electrical polarization in response to an external electric field. This flexibility means they show promise for many applications, for example in electronic devices and computer memory. Current ferroelectric materials are highly valued for their thermal and chemical stability and rapid electro-mechanical responses, but creating a material that is scalable down to the tiny sizes needed for technologies like silicon-based semiconductors (Si-based CMOS) has proven challenging.

Now, Hiroshi Funakubo and co-workers at the Tokyo Institute of Technology, in collaboration with researchers across Japan, have conducted experiments to...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Resolving the mystery of preeclampsia

21.10.2016 | Health and Medicine

Stanford researchers create new special-purpose computer that may someday save us billions

21.10.2016 | Information Technology

From ancient fossils to future cars

21.10.2016 | Materials Sciences

More VideoLinks >>>