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Related Concept Videos

X-ray Crystallography02:18

X-ray Crystallography

The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Crystallographic Point Groups01:29

Crystallographic Point Groups

Crystallographic point groups represent the various symmetry operations that can occur within crystals. They are unique in that at least one point will always remain unchanged during these actions. For instance, consider the triclinic system. This system, devoid of any axis or plane of symmetry, aligns with the C1 and Ci point groups.where Cᵢ is characterized solely by a center of inversion.Contrastingly, the monoclinic system introduces an element of symmetry. This system with one plane and...
Determination of Crystal Structures01:29

Determination of Crystal Structures

In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
Polar Coordinates: Problem Solving01:27

Polar Coordinates: Problem Solving

Directional radiation patterns are central to antenna analysis, as they illustrate how signal strength varies with direction. These patterns are often modeled using polar plots, where the radial distance from the origin represents signal intensity at a given angle. A commonly used idealized form is the four-lobed rose curve, which captures the concept of directional beams in a simplified mathematical form.The four-lobed rose curve, described by r = cos⁡(2θ), features four symmetric lobes, each...
Properties of Enantiomers and Optical Activity02:24

Properties of Enantiomers and Optical Activity

It is essential to understand the difference between chiral and achiral interactions and the implications thereof in optical activity and their applications. Just as our feet, which are chiral, interact uniquely with chiral objects, such as a pair of shoes, but identically with achiral socks, enantiomers of a molecule exhibit different properties only when they interact with other chiral media. An example of a significant implication from this facet is the phenomenon known as optical activity,...
Deformations in a Transverse Cross Section01:21

Deformations in a Transverse Cross Section

When a material is subjected to uniaxial stress, it elongates or contracts in the direction of the applied force, and also undergoes changes in the perpendicular directions. This behavior is crucial for understanding how materials behave under stress and is governed by mechanical properties such as Poisson's ratio v, which measures the ratio of transverse strain to axial strain.
As the material stretches, it expands or contracts in orthogonal directions to the load. This phenomenon varies...

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Related Experiment Video

Updated: Jul 8, 2026

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
09:43

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Published on: August 13, 2019

Diffraction analysis of rotationally symmetric optical systems using computer-generated aberration polynomials.

S C Tam1, G D Lewis, S Doric

  • 1Imperial College, Optics Section, Blackett Laboratory, London SW7 2BZ, UK.

Applied Optics
|April 15, 1983
PubMed
Summary
This summary is machine-generated.

A novel ray tracing method automatically generates optical aberration polynomials for analyzing diffraction in rotationally symmetric systems. This approach utilizes the Winograd Fourier transform for efficient computation, including complex surfaces.

More Related Videos

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Related Experiment Videos

Last Updated: Jul 8, 2026

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy
09:43

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Published on: August 13, 2019

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Area of Science:

  • Optics and Photonics
  • Computational Science

Background:

  • Accurate optical system analysis requires robust methods for calculating diffraction and aberrations.
  • Traditional methods can be computationally intensive, especially for complex optical designs.

Purpose of the Study:

  • To adapt and apply T. B. Andersen's ray tracing scheme for automatic optical aberration polynomial generation.
  • To perform diffraction analysis of rotationally symmetric optical systems using desktop computing.
  • To compute diffraction-based optical transfer functions (OTFs) efficiently.

Main Methods:

  • Implementation of a ray tracing scheme for automatic generation of optical aberration polynomials.
  • Application of the Winograd Fourier transform algorithm for computing diffraction-based OTFs.
  • Inclusion of aspherical and reflective surfaces in the optical system modeling.

Main Results:

  • Successful application of the ray tracing scheme to diffraction analysis.
  • Efficient computation of OTFs at various field positions.
  • Demonstrated capability to handle aspherical and reflective optical surfaces.

Conclusions:

  • The implemented ray tracing method provides an effective approach for analyzing diffraction in rotationally symmetric optical systems.
  • The use of the Winograd Fourier transform enhances computational efficiency for OTF calculations.
  • The method is versatile, accommodating complex optical elements like aspherical and reflective surfaces.