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

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

1.5K
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
1.5K
Measurement of Air Content in Concrete01:23

Measurement of Air Content in Concrete

936
Air content measurement in concrete is critical for ensuring structural integrity and durability of concrete structures, especially in environments prone to severe weather conditions. Accurate air content analysis optimizes concrete's resistance to freeze-thaw cycles and enhances its workability and strength. Several methods are standardized under ASTM guidelines to measure the air content in fresh concrete, each suitable for different concrete types and conditions.
The pressure method,...
936

You might also read

Related Articles

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

Sort by
Same author

Engineering Hydrogen Halide Leak Sensing on Metal-Modified InSe Monolayers: Distinct Roles of Mo and W.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Cardiac magnetic resonance biomarkers for cardiovascular complications in diabetes: a systematic review and meta-analysis.

Frontiers in cardiovascular medicine·2026
Same author

Low Barrier Interface of NiO-Ti<sub>3</sub>C<sub>2</sub>O<sub>2</sub> for Sulfur Hexafluoride Decomposition Gas-Sensing Application: A DFT Study.

Langmuir : the ACS journal of surfaces and colloids·2026
Same author

Mechanical Stiffening Promotes Growth, Invasion-Associated Phenotypes, and Reduced Selumetinib Sensitivity in 3D Plexiform Neurofibroma Cultures.

Cells·2026
Same author

Quantifying Mechanical Properties of Fresh Ovarian Tissue with Optical Brillouin Microscopy.

Methods in molecular biology (Clifton, N.J.)·2026
Same author

Computationally tailoring the adsorption behavior of ZrSe<sub>2</sub> for SF<sub>6</sub> decomposition species in GIS: Mechanistic insights into Cu<sub>2</sub>O/Ag<sub>2</sub>O functionalization.

Environmental research·2026
Same journal

Compressed multi-scale entropy and its application in mechanical fault diagnosis.

The Review of scientific instruments·2026
Same journal

Bidirectional drive and multi-resolution adjustment across frequency bands in inertial impact piezoelectric motors via multimodal resonant vibration.

The Review of scientific instruments·2026
Same journal

A magnetic field sensor based on flaky Terfenol-D material and dual fiber grating.

The Review of scientific instruments·2026
Same journal

A novel E-field eight-way cavity combiner for high-power S-band applications.

The Review of scientific instruments·2026
Same journal

Constant radius blade spring suspended bench for vibration isolation.

The Review of scientific instruments·2026
Same journal

Qualification of infrared optical fibers and emitters for a spectrometer for in situ planetary exploration: Results from the TRIS (TRansmission and Illumination System) project.

The Review of scientific instruments·2026
See all related articles

Related Experiment Video

Updated: Apr 28, 2026

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
05:14

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

817

Note: Real-time absolute air refractometer.

Pei Huang1, Jitao Zhang2, Yan Li1

  • 1State Key Lab of Precision Measurement Technology and Instruments, Department of Precision Instruments, Tsinghua University, Beijing 100084, China.

The Review of Scientific Instruments
|June 2, 2014
PubMed
Summary
This summary is machine-generated.

We developed a real-time air refractometer using the synthetic pseudo-wavelength (SPW) method for precise refractive index measurement. This innovative device achieves ambiguity-free results in under 2 milliseconds, enabling instantaneous compensation for laser interferometers.

More Related Videos

Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

2.1K
Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb
06:50

Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb

Published on: December 2, 2017

8.9K

Related Experiment Videos

Last Updated: Apr 28, 2026

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter
05:14

Comparison of Agreement and Accuracy using Binocular Wavefront Optometer with Autorefractor and Phoropter

Published on: September 16, 2025

817
Subjective Refraction Test Using a Smartphone for Vision Screening
05:36

Subjective Refraction Test Using a Smartphone for Vision Screening

Published on: October 18, 2024

2.1K
Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb
06:50

Diffuse Reflectance Spectroscopy: Getting the Capillary Refill Test Under One's Thumb

Published on: December 2, 2017

8.9K

Area of Science:

  • Optics and Photonics
  • Metrology
  • Interferometry

Background:

  • Accurate measurement of air's refractive index is crucial for precision optical systems.
  • Traditional methods can be time-consuming and prone to ambiguity.
  • Real-time compensation is needed for dynamic laser interferometer applications.

Purpose of the Study:

  • To develop a real-time absolute air refractometer.
  • To implement the synthetic pseudo-wavelength (SPW) method for direct refractive index determination.
  • To achieve high-speed, unambiguous air refractive index measurements.

Main Methods:

  • Utilizing laser heterodyne interferometry.
  • Employing three vacuum cells of specific lengths to synthesize pseudo-wavelengths.
  • Simultaneous data collection through parallel optical path arrangement.

Main Results:

  • Demonstrated a real-time absolute air refractometer.
  • Achieved ambiguity-free determination of the refractive index.
  • Measurement time reduced to less than 2 milliseconds per process.

Conclusions:

  • The synthetic pseudo-wavelength (SPW) method enables rapid and unambiguous air refractive index measurement.
  • The developed refractometer's real-time capability allows for instantaneous compensation in laser interferometers.
  • This technology advances precision metrology and optical system performance.