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

Interference: Path Lengths01:10

Interference: Path Lengths

1.4K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.4K
Graphical and Analytic Representation of Sinusoids01:20

Graphical and Analytic Representation of Sinusoids

458
Analyzing two sinusoidal voltages with equal amplitude and period but different phases on an oscilloscope, an instrument used to display and analyze waveforms, involves a three-step process.
The first step is measuring the peak-to-peak value, which is twice the amplitude of the sinusoid. This provides information about the maximum voltage swing of the waveform.
Secondly, the period and angular frequency are determined. The period is the time taken for one complete cycle of the waveform, while...
458
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

84
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
84
Sound Waves: Interference00:53

Sound Waves: Interference

3.9K
Sound waves can be modeled either as longitudinal waves, wherein the molecules of the medium oscillate around an equilibrium position, or as pressure waves. When two identical waves from the same source superimpose on each other, the combination of two crests or two troughs results in amplitude reinforcement known as constructive interference. If two identical waves, that are initially in phase, become out of phase because of different path lengths, the combination of crests with troughs...
3.9K
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

124
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...
124
IR Spectrometers01:25

IR Spectrometers

1.3K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
1.3K

You might also read

Related Articles

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

Sort by
Same author

Machine learning-based prediction of BV-relevant probiotic functional potential in vaginal-derived Lactobacillus crispatus strains.

BMC microbiology·2026
Same author

Multi-mode piezoelectric radiation-based microantennas and miniaturized wireless sensing unit driven by bulk acoustic waves.

Nature communications·2026
Same author

CD39 Expression in Peripheral CD4+ T Lymphocytes Is Associated With Disease Activity in Patients With Systemic Lupus Erythematosus.

Journal of immunology research·2026
Same author

APE1/Ref-1 redox function prevents VSMC phenotypic switching through KLF4 suppression.

Cellular signalling·2026
Same author

Preparation of Korean rice wine with probiotic indigenous <i>Saccharomyces cerevisiae</i> and their fermentation properties.

Food science and biotechnology·2026
Same author

Bioinspired Bacteria-Induced CO<sub>2</sub> Adsorption for In Situ Wood Mineralization.

ACS applied materials & interfaces·2026

Related Experiment Video

Updated: Aug 25, 2025

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.4K

Absolute distance measurement using sinusoidal phase modulating frequency sweeping interferometry with a reference

Shihua Zhang, Dandna Shan, Hao Jin

    Optics Express
    |October 19, 2022
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces frequency sweeping interferometry for precise absolute distance measurement. Real-time drift compensation and advanced phase extraction significantly reduce measurement uncertainty.

    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
    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

    21.9K

    Related Experiment Videos

    Last Updated: Aug 25, 2025

    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    9.4K
    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
    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

    21.9K

    Area of Science:

    • Optics and Photonics
    • Metrology
    • Precision Measurement

    Background:

    • Accurate absolute distance measurement is crucial in various scientific and industrial applications.
    • Traditional interferometry methods often face challenges with environmental drifts and limited precision.
    • Developing robust techniques for real-time drift compensation is essential for high-accuracy measurements.

    Purpose of the Study:

    • To propose and demonstrate a frequency sweeping interferometry technique for absolute distance measurement.
    • To implement real-time compensation for environmental drifts affecting measurement accuracy.
    • To achieve high precision in absolute distance measurements using sinusoidal phase modulation and advanced signal processing.

    Main Methods:

    • Utilizing a frequency-swept external cavity diode laser (ECDL) with sinusoidal frequency modulation.
    • Employing a HeNe laser for simultaneous monitoring and compensation of target and reference length drifts.
    • Applying sinusoidal phase modulation with non-overlapping frequencies via electro-optic modulators (EOMs).
    • Extracting interference phases using phase generated carrier (PGC) demodulation with frequency-division multiplexing.

    Main Results:

    • Demonstrated nanometer-level displacement measurement accuracy.
    • Significantly reduced measurement uncertainty through drift compensation and linear regression analysis.
    • Achieved an absolute distance measurement uncertainty of 10-5, validated against an incremental interferometer.

    Conclusions:

    • The proposed frequency sweeping interferometry technique offers high accuracy for absolute distance measurement.
    • Real-time drift compensation is effective in enhancing measurement precision.
    • The method provides a reliable and accurate approach for metrology applications.