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Holography Review: Description, History, and Applications

The main features of holography

  • Holography is the science of making holograms
  • A method of recording an interference pattern
  • The method is based on wavefronts diffraction
  • Holographic devices can record three-dimensional information
  • The result is a hologram (Shimobaba, & Ito, 2019)

The main features of holograms

  • An image received through holography
  • A picture of a light field
  • The hologram represents light reflected off objects
  • A hologram is a three-dimensional image
  • The image is different from a photograph

The invention of holography

  • Holography was invented in 1947 (Shimobaba, & Ito, 2019)
  • The inventor is physicist Dennis Gabor
  • The inventor is of Hungarian-British origin
  • The invention of the method was occasional
  • The invention is connected with microscope development

The history of holography and its development

  • In the 1970s, the theory was completed
  • Computer and digital technologies appeared
  • In the 1980s two-color reflection hologram appeared
  • The applications of computer holography have extended
  • Today, many light-shaping devices are used

Basic description of holography

  • A beam splitter divides light
  • A beam is divided into two parts
  • Laser beams are also used (Kostuk, 2019)
  • The apparatus includes the recording medium
  • Photographic film is usually a recording medium

The components of the holographic process

  • An object or a group of objects
  • A part of the beam illuminates objects
  • Another part illuminates the recording medium
  • A coherent light beam is required
  • A stable environment should be maintained

The physical principles of holographic processes

  • Interference is the basis of the process (Kostuk, 2019)
  • Wavefronts superimposition cause interference
  • Diffraction is another essential process
  • The produces wavefronts encounter an object
  • Wavefronts combine to reconstruct an object

Types of holograms

  • Reflection hologram based on the light reflection
  • Transmission hologram based on the laser light
  • Hybrid hologram based on both principles
  • Many other variations can be made
  • More computer-based types are used today

Holography and photography

  • Holography has a random light pattern
  • A photograph is a two-dimensional picture
  • A lens is used for a hologram
  • The holographic process requires two light beams
  • Holography requires a specific kind of illumination

Advantages of holography

  • Allows to receive a detailed three-dimensional picture
  • No special glasses are required
  • May be used in many areas
  • Holography is safe for health (Smith, 2019)
  • It can be essential in medical examination

Disadvantages of holography

  • The holographic device is heavy
  • The holographic system can be difficult to operate
  • Consequent packaging and delivery issues may occur
  • The equipment may be expensive
  • The system should always be stable

Areas and ways of use

  • The sphere of entertainment (for example, television)
  • Physics, mathematics, modelling and engineering
  • Using three-dimensional models in education
  • Biology; medical research and examination
  • Games, computer graphics and design

Medical applications of holography

  • Holography is used as an X-Ray
  • X-Ray holography allows receiving internal images
  • The method is used in endoscopy
  • It is used by dentists and orthodontists
  • Holograms are applied in ophthalmology

Importance in nursing practice and details of use

  • Measures internal cavities of a human body
  • The holographic recording is non-contact
  • The medical use of holography is safe
  • The process allows recording microscopic elements
  • The process facilitates internal examination

A brief overview of the process and its role

  • The recording method appeared in the 20th century
  • It can be applied to various areas of use
  • The method allows recording three-dimensional images
  • Holography is especially important in medicine
  • Computer technologies are often used in holography
  • Nowadays, digital holography is widespread

References

Shimobaba, T., & Ito, T. (2019). Computer holography: Acceleration algorithms and hardware implementations. Boca Raton, FL: CRC Press.

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Kostuk, R. K. (2019). Holography: Principles and applications. Boca Raton, FL: CRC Press.

Smith, M. C. (2019). Nursing theories and nursing practice. Philadelphia, PA: F.A. Davis.

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