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

137
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...
137

You might also read

Related Articles

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

Sort by
Same author

Quality of life in patients with gallbladder polyps: a multicentre prospective cohort study.

HPB : the official journal of the International Hepato Pancreato Biliary Association·2025
Same author

Design and implementation of a snapshot ptychographic wavefront camera array.

Optics express·2025
Same author

Revised Guidelines for the Treatment and Follow-Up of Gallbladder Polyps Do Not Reduce Unwarranted Cholecystectomies: Results of the POLYP Study.

United European gastroenterology journal·2025
Same author

Endoscopic sphincterotomy to prevent post-ERCP pancreatitis after self-expandable metal stent placement for distal malignant biliary obstruction (SPHINX): a multicentre, randomised controlled trial.

Gut·2024
Same author

Effect of optical diagnosis training on recognition and treatment of submucosal invasive colorectal cancer in community hospitals: a prospective multicenter intervention study.

Endoscopy·2024
Same author

Standardised training for endoscopic mucosal resection of large non-pedunculated colorectal polyps to reduce recurrence (*STAR-LNPCP study): a multicentre cluster randomised trial.

Gut·2024
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: Sep 11, 2025

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
05:57

Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

Published on: April 1, 2020

8.1K

High-efficiency, dynamic optical beam steering device using Pancharatnam phase.

Brandon Vreeland, Andre Van Rynbach, Philip Bos

    Applied Optics
    |August 12, 2025
    PubMed
    Summary
    This summary is machine-generated.

    A novel liquid crystal device offers efficient, non-mechanical optical beam steering. This Pancharatnam phase device achieves high steering angles and efficiency for infrared light.

    More Related Videos

    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
    A Protocol for Real-time 3D Single Particle Tracking
    10:16

    A Protocol for Real-time 3D Single Particle Tracking

    Published on: January 3, 2018

    15.0K

    Related Experiment Videos

    Last Updated: Sep 11, 2025

    Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station
    05:57

    Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

    Published on: April 1, 2020

    8.1K
    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
    A Protocol for Real-time 3D Single Particle Tracking
    10:16

    A Protocol for Real-time 3D Single Particle Tracking

    Published on: January 3, 2018

    15.0K

    Area of Science:

    • Photonics and Optical Engineering
    • Materials Science
    • Liquid Crystal Displays

    Background:

    • Non-mechanical beam steering is crucial for advanced optical systems.
    • Existing methods often face limitations in efficiency, aperture size, or complexity.
    • Liquid crystal devices offer tunable optical properties for beam manipulation.

    Purpose of the Study:

    • To propose and demonstrate a large-aperture, non-mechanical beam steering device.
    • To achieve high-efficiency beam steering using a continuous phase profile.
    • To develop an electrically tunable Pancharatnam phase gradient for beam control.

    Main Methods:

    • Utilized a fringe field electrode structure and vertical surface alignment of liquid crystal directors.
    • Implemented a novel two-step voltage application method.
    • Numerically calculated an example optical beam steering device for infrared light (1550 nm).

    Main Results:

    • Demonstrated a defect-free, continuous phase profile for high-efficiency beam steering.
    • Achieved steering angles for IR light ranging from less than 1 degree to over 10 degrees.
    • Obtained optical efficiencies exceeding 80%.

    Conclusions:

    • The proposed device offers a new approach to beam steering with previously unobtainable performance.
    • This single-layer Pancharatnam phase device provides electrically tunable, efficient beam steering.
    • The technology has potential applications in optical communication, sensing, and imaging.