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.
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.