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 Experiment Videos

Digital phase-shifting interferometer with an electrically addressed liquid-crystal spatial light modulator.

Youichi Bitou1

  • 1National Institute of Advanced Industrial Science and Technology, AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan. y-bitou@aist.go.jp

Optics Letters
|September 6, 2003
PubMed
Summary

A novel digital phase-shifting interferometer utilizes a liquid-crystal spatial light modulator for optical phase shifts. This innovation eliminates moving parts and calibration needs in interferometry.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Traceable Reference Full Metrology Chain for Innovative Aspheric and Freeform Optical Surfaces Accurate at the Nanometer Level.

Sensors (Basel, Switzerland)·2021
Same author

Three-spherical-mirror test for radius of curvature measurement using a Fabry-Pérot cavity.

Optics express·2019
Same author

Scanning deflectometric profiler for measurement of transparent parallel plates.

Applied optics·2016
Same author

Discontinuous surface measurement by wavelength-tuning interferometry with the excess fraction method correcting scanning nonlinearity.

Applied optics·2011
Same author

Accurate wide-range displacement measurement using tunable diode laser and optical frequency comb generator.

Optics express·2009
Same author

Displacement metrology directly linked to a time standard using an optical-frequency-comb generator.

Optics letters·2009

Area of Science:

  • Optics and Photonics
  • Interferometry
  • Liquid Crystal Displays

Background:

  • Traditional phase-shifting interferometers often require mechanical components for phase control.
  • Calibration of phase shift values can be complex and time-consuming.

Purpose of the Study:

  • To develop a digital phase-shifting interferometer with enhanced precision and reduced complexity.
  • To demonstrate a novel method for achieving optical phase shifts using a spatial light modulator.

Main Methods:

  • A Michelson-type polarization interferometer was designed.
  • A liquid-crystal-display coupled, parallel-aligned, nematic liquid-crystal spatial light modulator was integrated.
  • Optical phase shifts were digitally controlled by modifying a grating pattern on the spatial light modulator.

Related Experiment Videos

Main Results:

  • Accurate experimental demonstration of pi/2 phase steps was achieved using a heterodyne system.
  • The developed interferometer operates without any moving mechanical parts.
  • The system eliminates the need for calibration of phase shift values.

Conclusions:

  • A fully digital phase-shifting interferometer has been successfully developed.
  • The use of a spatial light modulator offers a robust and calibration-free approach to interferometry.
  • This technology advances digital optical metrology and instrumentation.