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

Phase Diagrams02:39

Phase Diagrams

50.2K
A phase diagram combines plots of pressure versus temperature for the liquid-gas, solid-liquid, and solid-gas phase-transition equilibria of a substance. These diagrams indicate the physical states that exist under specific conditions of pressure and temperature and also provide the pressure dependence of the phase-transition temperatures (melting points, sublimation points, boiling points). Regions or areas labeled solid, liquid, and gas represent single phases, while lines or curves represent...
50.2K
Phase Transitions02:31

Phase Transitions

23.2K
Whether solid, liquid, or gas, a substance's state depends on the order and arrangement of its particles (atoms, molecules, or ions). Particles in the solid pack closely together, generally in a pattern. The particles vibrate about their fixed positions but do not move or squeeze past their neighbors. In liquids, although the particles are closely spaced, they are randomly arranged. The position of the particles are not fixed—that is, they are free to move past their neighbors to...
23.2K
Inductance: Single-Phase And Three-Phase Line01:28

Inductance: Single-Phase And Three-Phase Line

628
Understanding the inductance of transmission lines is crucial for efficient design and operation in electrical power systems. This discussion delves into the inductance characteristics of single-phase two-wire and three-phase three-wire transmission lines with equal phase spacing.
Single-Phase Two-Wire Line:
A single-phase line consists of two solid cylindrical conductors, denoted as x and y. Each conductor carries phasor currents ix and iy, respectively. Given that the sum of these currents is...
628
Capacitance: Single-Phase And Three-Phase Line01:25

Capacitance: Single-Phase And Three-Phase Line

608
In electrical power systems, understanding the capacitance of transmission lines is fundamental for efficient operation.
Single-Phase Lines
Consider a single-phase, two-wire transmission line with equal phase spacing energized by a voltage source. One conductor carries a uniform positive charge, while the other carries an equal negative charge. The capacitance C of the line can be derived from the voltage V between the conductors. For a one-meter section of the line, the capacitance is given...
608
Phase Changes01:19

Phase Changes

5.4K
Phase transitions play an important theoretical and practical role in the study of heat flow. In melting or fusion, a solid turns into a liquid; the opposite process is freezing. In evaporation, a liquid turns into a gas; the opposite process is condensation.
A substance melts or freezes at a temperature called its melting point and boils or condenses at its boiling point. These temperatures depend on pressure. High pressure favors the denser form of the substance, so typically, high pressure...
5.4K
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

546
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...
546

You might also read

Related Articles

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

Sort by
Same author

Ptychography at all wavelengths.

Nature reviews. Methods primers·2026
Same author

Deep-ultraviolet ptychographic pocket-scope (DART): mesoscale lensless molecular imaging with label-free spectroscopic contrast.

eLight·2026
Same author

Introduction to the Special Issue on ptychography.

Journal of microscopy·2025
Same author

Depth of field of multi-slice electron ptychography: Investigating energy and convergence angle.

Journal of microscopy·2025
Same author

Computational optical sectioning via near-field multi-slice ptychography.

Optics letters·2024
Same author

Using old laboratory equipment with modern Web-of-Things standards: a smart laboratory with LabThings Retro.

Royal Society open science·2024
Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026
Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026
Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026
Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026
Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026
Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026
See all related articles

Related Experiment Video

Updated: Feb 2, 2026

Label-Free Identification of Lymphocyte Subtypes Using Three-Dimensional Quantitative Phase Imaging and Machine Learning
08:58

Label-Free Identification of Lymphocyte Subtypes Using Three-Dimensional Quantitative Phase Imaging and Machine Learning

Published on: November 19, 2018

13.0K

Near-field ptychographic microscope for quantitative phase imaging.

Samuel McDermott, Andrew Maiden

    Optics Express
    |November 25, 2018
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a new quantitative phase imaging (QPI) microscope using near-field ptychography. The system achieves accurate, high-quality phase images from minimal data, even for challenging samples.

    More Related Videos

    Assembly, Tuning and Use of an Apertureless Near Field Infrared Microscope for Protein Imaging
    12:27

    Assembly, Tuning and Use of an Apertureless Near Field Infrared Microscope for Protein Imaging

    Published on: November 25, 2009

    9.9K
    A Time-lapse, Label-free, Quantitative Phase Imaging Study of Dormant and Active Human Cancer Cells
    12:48

    A Time-lapse, Label-free, Quantitative Phase Imaging Study of Dormant and Active Human Cancer Cells

    Published on: February 16, 2018

    7.8K

    Related Experiment Videos

    Last Updated: Feb 2, 2026

    Label-Free Identification of Lymphocyte Subtypes Using Three-Dimensional Quantitative Phase Imaging and Machine Learning
    08:58

    Label-Free Identification of Lymphocyte Subtypes Using Three-Dimensional Quantitative Phase Imaging and Machine Learning

    Published on: November 19, 2018

    13.0K
    Assembly, Tuning and Use of an Apertureless Near Field Infrared Microscope for Protein Imaging
    12:27

    Assembly, Tuning and Use of an Apertureless Near Field Infrared Microscope for Protein Imaging

    Published on: November 25, 2009

    9.9K
    A Time-lapse, Label-free, Quantitative Phase Imaging Study of Dormant and Active Human Cancer Cells
    12:48

    A Time-lapse, Label-free, Quantitative Phase Imaging Study of Dormant and Active Human Cancer Cells

    Published on: February 16, 2018

    7.8K

    Area of Science:

    • Microscopy
    • Optical Physics
    • Biophysics

    Background:

    • Quantitative phase imaging (QPI) provides contrast for transparent samples like biological cells.
    • QPI measures refractive index and thickness variations by mapping optical path lengths.
    • Conventional QPI methods face limitations with optically thick samples and wide spatial frequencies.

    Purpose of the Study:

    • To detail the setup and operation of a novel QPI microscope.
    • To evaluate the performance of this new system using various phase objects.
    • To assess its capabilities with challenging sample types where other methods struggle.

    Main Methods:

    • Development of a new QPI microscope based on near-field ptychography.
    • Testing the system with diverse phase objects.
    • Analysis of phase images generated from near-field diffraction patterns.

    Main Results:

    • Accurate, high-quality phase images were obtained using minimal ptychographical data (as few as four diffraction patterns).
    • The system demonstrates effectiveness with optically thick samples.
    • The new QPI microscope successfully images samples with a wide range of spatial frequencies.

    Conclusions:

    • Near-field ptychography offers a robust approach for quantitative phase imaging.
    • This novel QPI system overcomes limitations of conventional and Fourier ptychography.
    • The technique shows promise for advanced imaging of biological and other transparent samples.