# hologram

> intermediate photograph that contains information for reproducing a three-dimensional image by holography

**Wikidata**: [Q3139490](https://www.wikidata.org/wiki/Q3139490)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hologram)  
**Source**: https://4ort.xyz/entity/hologram

## Summary
A hologram is an intermediate photograph that contains information for reproducing a three-dimensional image through holography. It was invented in 1962 by Yuri Denisyuk, Emmett Leith, and Juris Upatnieks in both the Soviet Union and United States. Holograms are classified as both 3D and 2D computer graphics, as well as artificial objects.

## Key Facts
- Inception: 1962, with creators Yuri Denisyuk, Emmett Leith, and Juris Upatnieks
- Developed simultaneously in the Soviet Union and United States
- Classified as both 3D computer graphics and 2D computer graphics
- Related to hologram tours, microholograms, hologram artists, and hologram concert residencies
- Has 11 sitelinks across Wikipedia languages including English, French, Italian, Russian, and Ukrainian
- Featured in the Google Knowledge Graph with IDs /g/122r2qgx and /g/1238s5tl
- Classified under Dewey Decimal Classification 774 (photography)
- Described by the Mala hirnycha encyclopædia and Grove Art Online
- Has a Wikipedia title "Hologram" and Commons category "Holograms"

## FAQs
### Q: What is a hologram used for?
A: Holograms are used to create three-dimensional images for various applications including art, security features on credit cards, data storage, and entertainment through hologram concerts and tours.

### Q: How is a hologram created?
A: A hologram is created through holography, a photographic technique that records light patterns to produce a three-dimensional image when illuminated properly.

### Q: What makes holograms different from regular photographs?
A: Unlike regular photographs that capture only the intensity of light, holograms record both the intensity and phase of light waves, allowing them to reproduce three-dimensional images with depth and parallax.

## Why It Matters
Holography revolutionized visual representation by enabling the creation of true three-dimensional images without special glasses or equipment. This technology bridges the gap between physical and virtual reality, finding applications across multiple fields from art and entertainment to security and scientific research. Holograms have transformed how we preserve and experience visual information, allowing for more immersive documentation of objects and scenes. In entertainment, hologram tours have enabled deceased artists to "perform" again, creating new revenue streams and fan experiences. The technology also serves critical functions in data storage, where holographic systems can store vast amounts of information in compact spaces. As augmented and virtual reality technologies advance, holography continues to evolve, maintaining its relevance in both practical applications and cultural significance.

## Notable For
- First successful demonstration in 1962 by multiple independent research teams
- Ability to reproduce true three-dimensional images without special viewing equipment
- Applications spanning art, security, data storage, and entertainment
- Creation of hologram tours allowing virtual performances by artists
- Classification as both 3D and 2D computer graphics, demonstrating its unique nature

## Body
### Technical Foundation
Holography works by recording interference patterns created when laser light reflects off an object and combines with a reference beam. This creates a complex pattern that, when illuminated correctly, reconstructs the original light field, producing a three-dimensional image that appears to float in space.

### Classification and Taxonomy
Holograms exist at the intersection of multiple classification systems. They are simultaneously 3D computer graphics (using three-dimensional geometric data) and 2D computer graphics (as they are ultimately recorded on flat surfaces). This dual classification reflects their unique nature as three-dimensional information stored in two-dimensional media.

### Related Technologies
The hologram ecosystem includes several specialized applications: microholograms for data storage, hologram artists for entertainment purposes, hologram concert residencies for extended performances, and hologram tours for traveling virtual concerts. These applications demonstrate the technology's versatility across different scales and use cases.

### Cultural Impact
Beyond technical applications, holograms have entered popular culture through their use in memorial concerts, museum displays, and even fictional representations like holographic meatloaf in media. The technology has become synonymous with futuristic visualization and has influenced how we imagine future communication and entertainment technologies.

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "hologram",
  "description": "intermediate photograph that contains information for reproducing a three-dimensional image by holography",
  "url": "https://en.wikipedia.org/wiki/Hologram",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q133454630",
    "https://commons.wikimedia.org/wiki/Category:Holograms"
  ],
  "additionalType": "image",
  "inception": "1962",
  "creator": [
    "Yuri Denisyuk",
    "Emmett Leith",
    "Juris Upatnieks"
  ]
}

## References

1. Art & Architecture Thesaurus
2. Nuovo soggettario
3. YSO-Wikidata mapping project. 2023
4. Wikibase TDKIV