Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

122
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.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
122
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

8.3K
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...
8.3K
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

209
Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...
209
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

135
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.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
135

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Chlorogenic Acid-Embedded Hydrogel for Visual pH Monitoring and Enhanced Antibacterial Performance.

Gels (Basel, Switzerland)·2026
Same author

A Coral-Inspired Dual Modal Hydrogel Sensor with Deep Learning-Assisted Decoupling of Force-Thermal Stimuli.

ACS applied materials & interfaces·2026
Same author

Baseline <sup>18</sup>F-FDG PET/CT habitat radiomics versus dual-channel deep learning for predicting interim PET early metabolic response in diffuse large B-cell lymphoma: a comparative study.

Frontiers in oncology·2026
Same author

Sweat and air permeable electronics enabled by engineered hierarchical fabric system for exercise management.

Microsystems & nanoengineering·2026
Same author

Protective effect and possible mechanisms of resveratrol in animal models of spinal cord injury: a preclinical systematic review and meta-analysis.

Frontiers in immunology·2026
Same author

Rate and key predictors of unplanned readmission following ischemic stroke: a systematic review and meta-analysis.

Frontiers in neurology·2026
Same journal

Multifunctional reconfigurable terahertz metasurface based on vanadium dioxide phase transition: achieving broadband absorption and efficient polarization conversion.

Applied optics·2026
Same journal

High-Q-factor electromagnetically induced transparency utilizing quasi-bound states in the continuum in an all-dielectric terahertz metasurface.

Applied optics·2026
Same journal

Automated stitching interferometry for high-precision metrology of X-ray mirrors.

Applied optics·2026
Same journal

Experimental demonstration of an approach to designing a metal-dielectric DBR resonant cavity structure.

Applied optics·2026
Same journal

High-precision wavefront reconstruction from a single-shot interferogram using a physics-driven hybrid feature calibration network.

Applied optics·2026
Same journal

Ultra-high-Q Fano resonance based on coupled topological corner states in Kagome photonic crystals.

Applied optics·2026
See all related articles

Related Experiment Video

Updated: Aug 15, 2025

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

9.9K

Electro-optic modulation aberration correction algorithm based on phase difference compensation.

Houpeng Sun, Yingchun Li, Huichao Guo

    Applied Optics
    |January 6, 2023
    PubMed
    Summary
    This summary is machine-generated.

    A new Light Detection and Ranging (LIDAR) system uses an electro-optic crystal and electron multiplication CCD for high-resolution, wide field-of-view imaging. An aberration correction algorithm improves edge-of-field uniformity, enhancing imaging accuracy.

    More Related Videos

    Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
    09:01

    Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

    Published on: April 4, 2017

    8.7K
    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
    05:46

    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

    Published on: September 20, 2024

    498

    Related Experiment Videos

    Last Updated: Aug 15, 2025

    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

    9.9K
    Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques
    09:01

    Gain-compensation Methodology for a Sinusoidal Scan of a Galvanometer Mirror in Proportional-Integral-Differential Control Using Pre-emphasis Techniques

    Published on: April 4, 2017

    8.7K
    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity
    05:46

    Author Spotlight: Advancements in Refractive Surgical Correction for Presbyopia and Exploring Postoperative Visual Acuity

    Published on: September 20, 2024

    498

    Area of Science:

    • Optics and Photonics
    • Remote Sensing Technology
    • Applied Physics

    Background:

    • Achieving wide field-of-view (FOV) and high resolution in Light Detection and Ranging (LIDAR) systems presents significant challenges.
    • Existing electro-optic modulation techniques can suffer from non-uniform interference light intensity at the edges of the FOV.

    Purpose of the Study:

    • To develop and validate a novel gating imaging structure for wide FOV, high-resolution LIDAR.
    • To investigate and mitigate electro-optic modulation aberrations in LIDAR systems.

    Main Methods:

    • Constructed a gating imaging structure integrating an electro-optic crystal (LiNbO3) and an electron multiplication CCD.
    • Developed a 3D ray tracing model based on index ellipsoid theory to analyze electro-optic modulation.
    • Proposed and implemented an electro-optic modulation aberration correction algorithm utilizing phase difference compensation.

    Main Results:

    • The proposed aberration correction algorithm improved edge-of-FOV interference light intensity from 0.87 to 0.94.
    • A LIDAR imaging simulation system demonstrated 5 mm imaging accuracy over a 1° FOV at 2000 m.
    • The average imaging error introduced by crystal electro-optic modulation was less than 2 cm.

    Conclusions:

    • The developed gating imaging structure and aberration correction algorithm effectively enhance LIDAR performance.
    • The system achieves high-resolution, wide FOV imaging with improved accuracy and reduced modulation-induced errors.
    • This approach offers a promising solution for advanced LIDAR applications requiring precise remote sensing.