Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Doppler Effect - II

Doppler Effect - II

The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...

Doppler Effect - I

Doppler Effect - I

The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments

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 distances...

Assessing Blood pressure using a doppler ultrasound

Assessing Blood pressure using a doppler ultrasound

To obtain accurate blood pressure measurements in clinical settings, especially when traditional methods are insufficient, healthcare professionals utilize the Doppler ultrasound technique. This method uses high-frequency sound waves to detect blood flow within the arteries, which is crucial for patients with conditions that complicate circulatory system assessment.
Pre-Procedural Guidelines for Doppler Ultrasound Blood Pressure Assessment:
Preparation of Equipment:

You might also read

Related Articles

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

Sort by

Same author

Hepatobiliary and Pancreatic: A pancreatic stone causing biliary obstruction through major papillary impaction.

Journal of gastroenterology and hepatology·2018

Same author

Impact force measurement of a spherical body dropping onto a water surface.

The Review of scientific instruments·2014

Same author

High-speed impact test using an inertial mass and an optical interferometer.

The Review of scientific instruments·2013

Same author

Nitrous oxide concentrations in maternal and fetal blood during caesarean section.

European journal of anaesthesiology·2003

Same author

Changes in gas concentrations in the Brandt endotracheal tube cuff during and after anaesthesia with nitrous oxide.

European journal of anaesthesiology·2003

Same author

[Anesthetic management of a patient with blood coagulation factor XII deficiency].

Masui. The Japanese journal of anesthesiology·2001

Search research articles

Related Experiment Video

Updated: May 26, 2026

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Dual beat-frequencies laser Doppler interferometer.

A Takita¹, H Ebara, Y Fujii

¹Department of Electronic Engineering, Faculty of Engineering, Gunma University, 1-5-1 Tenjin-cho, Kiryu 376-8515, Japan.

The Review of Scientific Instruments

|January 10, 2012

Summary

This summary is machine-generated.

This study introduces a novel dual beat-frequencies laser Doppler interferometer for measuring high-speed bidirectional motion. It overcomes velocity limitations using two distinct beat signals derived from a Zeeman laser.

More Related Videos

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Related Experiment Videos

Last Updated: May 26, 2026

Implementation of a Reference Interferometer for Nanodetection

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Characterizing Far-infrared Laser Emissions and the Measurement of Their Frequencies

Published on: December 18, 2015

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Area of Science:

Optics and Photonics
Metrology
Laser Interferometry

Background:

Laser Doppler interferometry is crucial for precise velocity measurements.
Conventional methods face limitations in measuring high-speed bidirectional motion.

Purpose of the Study:

To propose and demonstrate a dual beat-frequencies laser Doppler interferometer.
To overcome the velocity measurement limitations of existing systems.

Main Methods:

Utilized a Zeeman laser emitting two frequencies, f(1) and f(2).
Introduced these frequencies into signal beams, which were Doppler shifted to f(1)' and f(2)'.
Employed two photodetectors to capture beat signals |f(1)' - f(2)| and |f(1) - f(2)'|.

Main Results:

Successfully demonstrated a dual beat-frequencies laser Doppler interferometer.
The system measures velocity based on Doppler shift, proportional to object velocity.
Enabled velocity measurement beyond the conventional limit v(c) = λ(f(1) - f(2))/2.

Conclusions:

The proposed dual beat-frequencies interferometer effectively measures high-speed bidirectional motion.
This technique significantly enhances the velocity measurement range in laser Doppler interferometry.