CT: Holography is the process of producing holograms and, although they are recorded on photographic film, the process is quite different from normal photography. Holography uses light interference or wave optics, whereas normal photography uses geometric optics.
S: PHYS – https://bit.ly/2BbFUeK (last access: 12 December 2018)
N: 1. Early 19c., of writing, from holograph + -y (4); physics sense, “process of using holograms,” is from 1964, coined by discoverer, Hungarian-born physicist Gábor Dénes, from hologram on analogy of telegraphy/telegram.
2. The recording of an image on photographic emulsions through the use of coherent light waves (laser) without the use of a conventional optical system.
3. Holography is based on the principle of interference. A Hologram captures the interference pattern among two or more beams of Laser lights.
4. Uses of Holography in Today´s World:
- Military Mapping in America
- High Information Storage Capacity
- Medical use
- Fraud and Security
- Holography as an Art
5. Holography is on its way to revolutionizing medicine. It can be a tool for visualizing patient data in training students and surgeons.
6. Bank notes are also starting to incorporate secure holograms. In the UK, the newest £5 bank note has an image of Big Ben and uses holography to produce a set of changing colors as you tilt the note.
7. The role of artists in holography is very old. In the UK, Margaret Benyon, the “mother” of British creative holography, managed to secure access to complex and expensive holographic recording equipment.
8. Devices capable of generating the same modulated light—without the physical object present—are known as true 3-D displays, which includes holography and light-field displays.
S: 1. OED – https://bit.ly/2QqDO53 (last access: 12 December 2018). 2. TERMIUM PLUS – https://bit.ly/2Bg2cvY (last access: 14 December 2018). 3 & 4. INFOGINX – https://bit.ly/2QoTA0k (last access: 12 December 2018). 5 & 6. NASDAQ – https://bit.ly/2JDIcph (last access: 12 December 2018). 7. INFOGINX – https://bit.ly/2QoTA0k (last access: 12 December 2018). 8. PHYSORG – https://bit.ly/2Uwq7QJ (last access: 12 December 2018).