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Related Concept Videos

Interference and Diffraction02:18

Interference and Diffraction

Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
Propagation of Waves01:07

Propagation of Waves

When a wave propagates from one medium to another, part of it may get reflected in the first medium, and part of it may get transmitted to the second medium. In such a case, the interface of the two mediums can be considered as a boundary that is neither fixed nor free.
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...
Interference and Superposition of Waves01:07

Interference and Superposition of Waves

When two waves of the same nature occur in the same region simultaneously, they result in interference. Interference of waves implies that the net effect of the waves is the sum of the individual waves' effects. However, it does not imply that the individual waves affect the propagation of other waves.
Interference occurs in mechanical waves, such as sound waves, waves on a string, and surface water waves. Mechanical waves correspond to the physical displacement of particles. Hence,...
Reflection of Waves01:07

Reflection of Waves

When a wave travels from one medium to another, it gets reflected at the boundary of the second medium. A common example of this is when a person yells at a distance from a cliff and hears the echo of their voice. The sound waves (longitudinal waves) traveling in the air are reflected from the bounding cliff. Similarly, flipping one end of a string whose other end is tied to a wall causes a pulse (transverse wave) to travel through the string, which gets reflected upon reaching the wall. In...
The Wave Nature of Light02:12

The Wave Nature of Light

The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.

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Related Experiment Video

Updated: Jun 16, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

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Published on: March 20, 2017

Synthesis of complex optical wavefronts.

P L Ransom

    Applied Optics
    |February 2, 2010
    PubMed
    Summary

    This study compares five coding schemes for synthesizing optical wavefronts using computer-generated holograms. It quantifies their computational and drawing requirements, aiding in the selection of optimal methods for holographic display technologies.

    Area of Science:

    • Optics
    • Computer-generated holography
    • Digital image processing

    Background:

    • Computer-generated holograms (CGHs) are essential for synthesizing optical wavefronts.
    • Two primary types of synthetic holograms exist: direct wavefront encoding and Fourier transform encoding.
    • The resolution and extent of the synthesized wavefront are inversely related for direct encoding and directly related for Fourier transform encoding.

    Purpose of the Study:

    • To characterize and compare five distinct coding schemes for CGH synthesis.
    • To define key metrics for evaluating the computational and drawing device requirements of each scheme.
    • To provide a framework for selecting appropriate coding schemes based on system capabilities.

    Main Methods:

    • Analysis of two types of synthetic holograms: direct wavefront encoding and Fourier transform encoding.

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  • Characterization of five coding schemes based on minimum sample evaluation and drawing resolution-length product.
  • Quantification of computer and drawing device capabilities needed for each scheme.

    • Main Results:

    • The extent of the optical wavefront varies inversely with resolution for direct encoding and directly for Fourier transform encoding.
    • Five coding schemes were evaluated using two key quantities: minimum sample count and the product of resolution and length.
    • These quantities serve as measures for required computer and drawing device capabilities.

    Conclusions:

    • The defined quantities allow for a quantitative comparison of different coding schemes.
    • Knowledge of these metrics aids in selecting the most suitable coding scheme for specific applications.
    • This comparative analysis is crucial for optimizing the design and implementation of computer-generated holographic systems.