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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.
Clipper Circuit01:18

Clipper Circuit

A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
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Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
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Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
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Retarders

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Related Experiment Video

Updated: Jun 6, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Achromatic wave retarder by phase subtraction.

W C Yip, H C Huang, H S Kwok

    Applied Optics
    |November 25, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed an achromatic phase retarder using two optical prism structures. This innovative design minimizes phase errors across broad spectral ranges, enhancing optical performance.

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    Area of Science:

    • Optics and Photonics
    • Optical Engineering
    • Materials Science

    Background:

    • Phase retarders are crucial optical components for controlling light polarization.
    • Chromatic dispersion in conventional retarders limits their performance over wide spectral ranges.
    • Achieving achromatic phase retardation is essential for broadband optical systems.

    Purpose of the Study:

    • To propose and analyze a novel method for constructing an achromatic phase retarder.
    • To achieve a constant phase retardation over a broad spectral range.
    • To minimize phase errors in optical systems, particularly in the visible and near-infrared regions.

    Main Methods:

    • Utilizing phase subtraction in two identical optical structures composed of right-angle prisms.
    • Aligning the prisms orthogonally and employing materials with different refractive indices for dispersion compensation.
    • Analyzing the phase retardation by reversing the roles of s and p waves in the structures.

    Main Results:

    • Demonstrated that phase retardation can be made constant over a broad spectral range by proper material selection.
    • Calculations with commercial optical glasses show significantly reduced phase errors.
    • Achieved a phase error of only 0.35° for a 90° phase retarder (quarter-wave plate) across specific visible and near-infrared bands.

    Conclusions:

    • The proposed phase subtraction method effectively creates achromatic phase retarders.
    • The design offers a viable solution for broadband applications requiring precise polarization control.
    • The technique shows promise for developing high-performance optical components for diverse spectral regions.