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Holography Review: Description, History, and Applications
The main features of holography
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Holography is the science of making holograms
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A method of recording an interference pattern
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The method is based on wavefronts diffraction
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Holographic devices can record three-dimensional information
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The result is a hologram (Shimobaba, & Ito, 2019)
The main features of holograms
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An image received through holography
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A picture of a light field
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The hologram represents light reflected off objects
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A hologram is a three-dimensional image
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The image is different from a photograph
The invention of holography
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Holography was invented in 1947 (Shimobaba, & Ito, 2019)
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The inventor is physicist Dennis Gabor
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The inventor is of Hungarian-British origin
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The invention of the method was occasional
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The invention is connected with microscope development
The history of holography and its development
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In the 1970s, the theory was completed
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Computer and digital technologies appeared
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In the 1980s two-color reflection hologram appeared
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The applications of computer holography have extended
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Today, many light-shaping devices are used
Basic description of holography
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A beam splitter divides light
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A beam is divided into two parts
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Laser beams are also used (Kostuk, 2019)
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The apparatus includes the recording medium
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Photographic film is usually a recording medium
The components of the holographic process
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An object or a group of objects
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A part of the beam illuminates objects
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Another part illuminates the recording medium
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A coherent light beam is required
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A stable environment should be maintained
The physical principles of holographic processes
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Interference is the basis of the process (Kostuk, 2019)
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Wavefronts superimposition cause interference
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Diffraction is another essential process
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The produces wavefronts encounter an object
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Wavefronts combine to reconstruct an object
Types of holograms
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Reflection hologram based on the light reflection
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Transmission hologram based on the laser light
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Hybrid hologram based on both principles
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Many other variations can be made
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More computer-based types are used today
Holography and photography
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Holography has a random light pattern
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A photograph is a two-dimensional picture
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A lens is used for a hologram
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The holographic process requires two light beams
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Holography requires a specific kind of illumination
Advantages of holography
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Allows to receive a detailed three-dimensional picture
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No special glasses are required
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May be used in many areas
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Holography is safe for health (Smith, 2019)
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It can be essential in medical examination
Disadvantages of holography
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The holographic device is heavy
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The holographic system can be difficult to operate
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Consequent packaging and delivery issues may occur
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The equipment may be expensive
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The system should always be stable
Areas and ways of use
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The sphere of entertainment (for example, television)
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Physics, mathematics, modelling and engineering
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Using three-dimensional models in education
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Biology; medical research and examination
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Games, computer graphics and design
Medical applications of holography
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Holography is used as an X-Ray
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X-Ray holography allows receiving internal images
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The method is used in endoscopy
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It is used by dentists and orthodontists
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Holograms are applied in ophthalmology
Importance in nursing practice and details of use
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Measures internal cavities of a human body
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The holographic recording is non-contact
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The medical use of holography is safe
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The process allows recording microscopic elements
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The process facilitates internal examination
A brief overview of the process and its role
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The recording method appeared in the 20th century
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It can be applied to various areas of use
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The method allows recording three-dimensional images
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Holography is especially important in medicine
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Computer technologies are often used in holography
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Nowadays, digital holography is widespread
References
Shimobaba, T., & Ito, T. (2019). Computer holography: Acceleration algorithms and hardware implementations. Boca Raton, FL: CRC Press.
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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