Holographic refers to anything related to holography, a technique that records and reconstructs three-dimensional images using the wave properties of light. Unlike a photograph, which captures a flat snapshot, a holographic image preserves depth information so you can see different perspectives of an object as you move around it. The technology dates back to 1947, when physicist Dennis Gabor developed the holographic method, a breakthrough that earned him the Nobel Prize in Physics in 1971.
How Holography Actually Works
A hologram is created by splitting a laser beam into two paths. One beam, called the reference beam, goes directly to a recording surface (like a special film or plate). The other beam bounces off the object being recorded. When these two beams meet on the recording surface, they create an interference pattern: a complex set of microscopic fringes where the light waves overlap. This pattern encodes both the brightness and the depth of the original scene.
When you later shine light on the developed hologram, the interference pattern bends the light in a way that reconstructs the original wavefront. Your eyes receive light as if it were still coming from the real object, so you perceive genuine three-dimensional depth without needing glasses or a screen. This is fundamentally different from 3D movies or VR headsets, which trick each eye with slightly different flat images.
Types of Holograms
The two main categories are transmission holograms and reflection holograms, and the key difference is how you light them up to see the image.
- Transmission holograms require light, sometimes a laser, shining through the hologram from behind. These tend to produce vivid, highly detailed images but need controlled lighting conditions.
- Reflection holograms can be viewed with an ordinary white spotlight shining from the front, much like looking at a painting on a wall. The security stickers on credit cards and banknotes are small reflection holograms, which is why they shimmer with rainbow colors when you tilt them under a lamp.
What People Call “Holograms” Usually Aren’t
Most of the floating images you see at concerts, trade shows, and theme parks are not true holograms. They typically use a Victorian-era trick called Pepper’s Ghost: a real or recorded image is reflected off a transparent screen angled at 45 degrees, creating a ghostly figure that appears to hover in space. The illusion looks impressive from the front, but it falls apart from other viewing angles and requires a physical screen to work.
A real hologram can be viewed from multiple angles, reveals different sides of the object as you move, and needs no special screen or lens. Many online sources incorrectly label Pepper’s Ghost effects as holograms, so if you’ve seen a “holographic” performer on stage, you were almost certainly watching a clever reflection rather than true holography.
Holographic Displays vs. Light Field Displays
Two technologies are competing to bring realistic 3D visuals to screens: holographic displays and light field displays. Both offer continuous parallax, meaning the image shifts naturally as you move your head, creating a comfortable viewing experience without glasses. The core difference lies in how they create their light fields. A holographic display reconstructs light using phase information, essentially recreating the exact wave pattern an object would produce. A light field display works by projecting expanding fan beams from each pixel, approximating the same effect through sheer density of directional light rays.
Neither technology has reached the mainstream consumer market yet, but both are actively being developed for medical visualization, engineering design, and entertainment.
Holography in Surgery and Medicine
One of the most practical modern uses of holographic technology is in surgical planning. Mixed-reality headsets can overlay a holographic 3D model of a patient’s anatomy directly onto their body during an operation, giving surgeons a live navigational guide. A recent study testing this approach for brain surgery found that the system could map holographic models onto patients with an accuracy of about 3 millimeters. That level of precision proved useful for planning where to open the skull, guiding tumor removal, and draining hemorrhages.
Beyond navigation, holographic imaging lets medical teams rotate and zoom into CT or MRI scans as full 3D objects rather than scrolling through flat slices on a monitor. This is especially valuable for complex cases where understanding spatial relationships between a tumor and surrounding blood vessels can change the surgical approach entirely.
Holographic Data Storage
Because holograms encode information throughout the volume of a material rather than just on its surface, they can pack data far more densely than conventional discs. A holographic storage company demonstrated a density of 64.3 gigabytes per square inch of disc space, compared to about 37.5 gigabytes per square inch for a typical magnetic hard drive at the time. At that density, a disc the size of a postage stamp could hold 25 gigabytes, roughly 6,250 songs.
Prototype holographic discs have reached 300 gigabytes on a single disc, with designs targeting 1.6 terabytes, enough to store more than 100 DVD-quality movies. The technology has been slow to reach consumers due to manufacturing costs, but the underlying physics remain attractive for archival storage where enormous capacity and long-term stability matter.
How AI Is Speeding Up Hologram Creation
Generating a hologram digitally (called computer-generated holography) has traditionally been painfully slow because the calculations involve simulating how light waves interfere across millions of points. Deep learning is changing that equation dramatically. Neural networks trained on the physics of light diffraction can now produce full-HD holograms in as little as 20 to 57 milliseconds, fast enough for real-time video. One approach achieved a 50-fold reduction in computation time compared to conventional methods while maintaining equivalent visual quality.
Even higher resolutions are becoming feasible. A system called Holoencoder can generate 4K holograms (3,840 by 2,160 pixels) in about 150 milliseconds. Once these neural networks are trained, they generalize well to new scenes without needing to be re-optimized each time. This is the key bottleneck being removed: if holograms can be computed in real time, holographic video displays and augmented reality become far more practical.
The Size of the Holographic Market
The global digital holography market was valued at roughly $5.2 billion in 2025 and is projected to grow at an annual rate of about 20.6%, reaching an estimated $28 billion by 2035. That growth is being driven by demand across medical imaging, data storage, security (anti-counterfeiting labels), and the development of next-generation 3D displays for both consumer electronics and industrial design.