Hologram technology and the way it works

Hologram technology and the way it works

In the past two years, Dubai’s Opera has witnessed a special and strange event, after it revived evenings of the “Eastern Planet, Um Kulthum” with hologram technology, accompanied by an orchestra behind her.

And after the success achieved by the United Arab Emirates, it is preparing today to recreate the unique experience with the Egyptian artist “Abdel Halim Hafez” who passed away, on the opera stage in Dubai, with the same technique, during the days of Eid Al-Fitr.

 As he performs a group of his famous songs in two daily concerts on May 13, 14.

You may first think that the news is incredible, and it makes sense that it piques your curiosity that you want to know the details of the hologram technology and how it happens.

That is why, we will show you in this article all the information you need to know, so let us delve into…

Definition of hologram technology:

The history of this technology goes back to 1947, at the hands of the scientist “Dennis Gabor”.

The hologram technology is the next stage of photographic technology that records the scattered light from an object, then re-projects it as a 3D object so that you can see it without using special equipment such as glasses or cameras.

In a clearer way, it represents a kind of three-dimensional holograms that present animation or objects as if they are real, by appearing standing on a nearby surface or floating in the air, with the ability to see them from all sides to form a realistic image that enables the viewer to walk around the screen with complete comfort .

How the hologram technology works:

The laser light beam is divided into two identical beams, then one of the split beams (light beam) is directed at the object, and then it is propagated on the recording mediatory.

Then, the second beam (the reference beam) is forwarded through the mirrors on the recording mediatory without going through the object.

Photographic panels are widely used as a method for recording, and two laser beams intersect and interfere with the recording mediatory, so that the interference pattern is subsequently recorded on the photographic plates, and for this process the presence of the original light is required in order to display the encoded version of the scene from the recording mediatory.

The laser beam illuminates the recorded hologram and is deflected by the surface pattern of the hologram, giving a field of light identical to the scene that was captured, and then propagating on the hologram to reconstruct the width of the object.

There are two common types of holographic techniques:

  • SLM technology.

  • “CGH” computer-generated graphics.

There are three main steps to reconstruct the 3D image within hologram technology, and they are:

  1. Sequential recording from a different perspective or multi-view capture by a group of cameras.
  2. Convert the captured data into a data format suitable for display.
  3. Display data in multiple SLMs to enlarge the viewing angle.

The basic system requirements for 3D hologram projection into the air consist of:

  • 3D Object Reconstruction Device.
  • An aerial display.

The reconstructing device creates a three-dimensional image for the airdrop to project in the air.

Holographic electrophoresis can also project a 3D image in the air without the need to use any multiple projectors and mechanical processing.

The rotating mirror system is used to display a three-dimensional image to appear real, and with a high-speed video projector, the mirrors that reflect in all directions are rotated, which would display images from any angle in three dimensions.

Multiple interference patterns are recorded at different wavelengths to create a color image, and then 3D projectors use lasers of different wavelengths to illuminate the interference patterns corresponding to their respective colors.

Hologram technology applications:

  1. Safety:

Safe holograms are difficult to fake because they are 3D, and such images are found on currencies, passports, credit cards, DVDs, and more.

  1. Data storage:

By following the 3D data storage method, you can store a large amount of information inside high-density crystals or polymers, because this feature is to use the full size of the recording mediatory, not just the surface.

In addition to the ability of holographic storage to become the next generation of storage media, because the writing speed is one gigabyte per second and one terabyte per second reading.

  1. Education:

Hologram technology can create mixed reality by combining digital and real information, as students can examine and interact with 3D images to understand complex topics.

  1. Medicine:

Hologram technology is expected to revolutionize the medical field, by producing full and colorful 3D images of the human body and its complex organs such as the brain, heart, lungs, liver, nerves, and muscles.

This technique can also help in planning before the surgery, which increases the chances of its success.

In addition, 3D digital microscopy gives the possibility to count cells and analyze subcellular motility deep in living tissues.

  1. Military:

Secure military information storage and 3D mapping of battlefields.

  1. Entertainment and games:

The hologram technology creates a sense of live performance, and the theatrical performances by Dubai Opera are a perfect example of this, which was represented by the revival of contemporary stars and artists on stage.

3D display tables can also provide a truly multiplayer gaming experience, and some companies are currently working to integrate hologram technology with augmented reality and smartphone screens to allow 3D games on mobile phones.

Conclusion:

We can say that the hologram technology will constitute a qualitative and distinctive leap in the world of modern technology, especially after the United Arab Emirates continued to repeat its experience in embodying the most important Arab artists on its theaters to revive their memory through this interesting technology.

Now, a few days separate us from watching the artist Abdel Halim Hafez appearing on the Dubai Opera stage with the distinctive hologram technology.

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