Hologram

The hologram

1. TOPIC: HoloGRAM

2. Content Table Hologram History How is a hologram created ? How does a hologram work ? What are holograms used for? What are the features of hologram ? What is hologram structure ? What are the components of a hologram ? What are the advantages of holograms ? What are the uses of hologram in the future?

3. H ologram A hologram is a picture of a "whole" object, showing it in three dimensions. We've all seen cheap hologram images on credit cards and ID cards (where they help prevent copying). Far more impressive are large holograms that take the form of a ghostly 3-D moving figure that you can walk around to see from all angles. Holograms were invented in 1947 but only perfected after the invention of the laser in 1960. Today they're used in such technologies as compact-disc players and checkout scanners, and holograms can be created of the inside of live internal organs to permit doctors to examine the organs in great detail. And soon televisions with hologram technology may enable us to watch in "3-D".

4. History Dennis Gabor CBE FRS was a Hungarian-British electrical engineer and physicist, most notable for inventing holography, for which he later received the 1971 Nobel Prize in Physics. He obtained British citizenship in 1934, and spent most of his life in England

5. How is a hologram created? A hologram is made by superimposing a second wavefront ( normally called the reference beam) on the wavefront of interest, there by generating an a physical medium.

6. How does a hologram work ? So, how do holograms work? Holography is a unique method of photography whereby 3D objects are recorded using a laser and then restored as precisely as possible to match the originally recorded object. When illuminated via a laser, holograms are able to form an exact 3D clone of the object and duplicate its features.03-Feb

7. Uses Holograms can be used in healthcare to visualize patient data. Ordinarily, doctors rely on Magnetic Resonance Imaging (MRI) and ultrasound scans to generate 2D images of internal organs, with which they have to imagine how the organs would look in 3D

8. What are holograms used for? This technique is used to perform imaging of multidimensional objects. Holography uses hardware, software and more exotic types of programming to create hologram image. This technology records light scattered from an object to present it in a 3D digital image.

9. What are the features of hologram? The images are true three-dimensional images, showing depth and parallax and continually changing in aspect with the viewing angle. Any part of the hologram contains the whole image! The images are scalable. They can be made with one wavelength and viewed with another, with the possibility of magnification.

10. What is the basic theory and characteristics of hologram? In the holographic plate, both the beams combine and interference pattern will be formed. This interference pattern is recorded on the holographic plate. The three-dimensional image of the object can be seen by exposing the recorded holographic plate [hologram] to coherent light. This is the principle of holography.

11. What is the technology of hologram? In simple terms, hologram technology is a three-dimensional projection which can be seen without using any special equipment such as cameras or glasses. The image can be viewed from any angle, so as the uses walks around the display the object will appear to move and shift realistically.

12. There are three types of holograms: Reflection hologram. Transmission hologram.

13. Reflection holograms form images by reflecting a beam of light off the surface of the hologram. This type of hologram produces very high quality images but is very expensive to create. (ii) Transmission holograms form images by transmitting a beam of light through the hologram.

14. What is hologram structure? A hologram is a physical structure that diffracts light into an image. The term 'hologram' can refer to both the encoded material and the resulting image. Martina Mrongovius 'The Conqueror'

15. What are the components of a hologram ? Laser . Lasers are the main components in holographic equipment, and produce the actual images. The image color will depend on the type of laser used to create the image. The most common laser used for creating holograms is the red laser or helium-neon ( HeNe ) lasers. Holograms can be used in healthcare to visualize patient data. Ordinarily, doctors rely on Magnetic Resonance Imaging (MRI) and ultrasound scans to generate 2D images of internal organs, with which they have to imagine how the organs would look in 3D.08-Feb-2022

16. What are the advantages of holograms? It offers creation of multiple images on single plate including 3D images . ➨Holographic technologies can be easily combined with other technologies . ➨It does not require special glasses to view and can be viewed from any angle. ➨ It does not require any projection

17. What are the uses of hologram in the future? Today's holograms are more advanced and are being used in medicine, surgery, space exploration, and advertising. Technology is sparking new opportunities for communication, education, entertainment, and more. Holograms have a lot of potentials to impact society in the future.

18. Which lens is used in hologram ? Moreover , in the holographic reproduction, we use a digital conical lens instead of the other lenses. By loading the phase of the conical lens on the SLM and adjusting the focal length of the corresponding colors, color holographic projection of the real object can be realized without chromatic aberration.

19. Where is hologram made ? Holograms are made by using lasers. The reason that they use lasers instead of regular (white) light is because laser light is "coherent." What that means is that all of the light waves in a laser beam are the same size, and vibrate at exactly the