Moiré topography using a liquid-crystal-grating based frequency modulation technique

Fumio Kobayashi; Yukitoshi Otani; Toru Yoshizawa

doi:10.1117/12.798147

11 August 2008 Moiré topography using a liquid-crystal-grating based frequency modulation technique

Fumio Kobayashi, Yukitoshi Otani, Toru Yoshizawa

Proceedings Volume 7063, Interferometry XIV: Techniques and Analysis; 70630O (2008) https://doi.org/10.1117/12.798147
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

A projection moiré topography using two liquid crystal (LC) grating devices is proposed using frequency modulation. The moiré contour can be obtained by changing the LC grating pitch. It is possible to remove the original grating by electrically varying the period and averaging appropriately. Both a frequency modulation and a phase shift technique are applicable to this system because of the LC grating device. Some experimental results are presented.

Citation Download Citation

Fumio Kobayashi, Yukitoshi Otani, and Toru Yoshizawa "Moiré topography using a liquid-crystal-grating based frequency modulation technique", Proc. SPIE 7063, Interferometry XIV: Techniques and Analysis, 70630O (11 August 2008); https://doi.org/10.1117/12.798147

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available