From smartphone-based augmented reality to AR headsets, and the bank card in your wallet, holograms are already in your life. In this article we are going to explain what holograms are by answering the following questions: What is a hologram? How do holographic projections work? and What can holograms be used for? Keep reading and find out more about holograms and their uses to help you to #ONEUPYOURBUSINESS!
A hologram is a photographic technique that records the light scattered from an object, which makes the object appear three-dimensional. There are various types of holograms and below we provide a few examples of different types:
Transmission holograms: these enable light to shine through them and the image to be seen from the side
Rainbow holograms: these are the holograms you will probably be most familiar with as these are used on things such as credit cards and driver’s licenses for security purposes.
The “Pepper’s Ghost” effect: this is a 3D projection that is created with a hologram effect. An example of this is Tupac's Hologram Performance at the 2012 Coachella Music Festival. The artist, whom is deceased, made an appearance on stage as a hologram performing alongside Snoop Dogg
The Holographic Smokescreen: quite similar to the “Pepper’s Ghost” effect, however this hologram works by using artificially generated smoke or a semi-transparent net as a “screen” for the hologram to be projected onto. The projection comes from behind rather than below it which creates the hologram and is most likely used when the design is to appear slightly translucent
Live Science explains that projected holograms work when a laser beam is shined onto the object or person you want to record and the recording medium. The laser beam is split into two similar beams and redirected using mirrors where one of the beams (called the illumination or object beam) is directed to the object where some of the light is reflected off the object onto the recording medium.
The second beam (reference beam) is directed to the recording medium. This creates a precise image in the hologram location. Therefore, the two beams, illumination beam and the reference beam, intersect and interfere with one another causing a pattern of a virtual image for us to see.
Many industries have already implemented hologram technology through smartphone-based augmented reality (AR) applications and AR headsets. For instance, the Microsoft HoloLens Mixed Reality headset is a reference to holograms as they allow you to see a 3D virtual object that is not really there but it appears as if it is. The technology blends real world objects with digital content in real time. Below we list how holograms can be useful to various industries:
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