Frequency-shifting shadow moire technique

Zhao Wang; Yushan Tan; Hong Zhao; Wenyi Chen

doi:10.1117/12.316442

6 July 1998 Frequency-shifting shadow moire technique

Zhao Wang, Yushan Tan, Hong Zhao, Wenyi Chen

Proceedings Volume 3479, Laser Interferometry IX: Applications; (1998) https://doi.org/10.1117/12.316442
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

A new method is presented to extract quantitative information of Moire fringes. It is different from the method of phase shift. Instead of changing the phase of Moire fringe, it changes the frequency of the Moire fringe. The theoretical formula is introduced for a special relationship of three frequencies. For unwrapping the phase image, the first step is to expand the cosine value range from (0, (pi) ) to (0,2 (pi) ) to avoid the indetermination of 'plus' or 'minus.' The experiment result is given and the effect of the position of light source on measuring results is also discussed.

Citation Download Citation

Zhao Wang, Yushan Tan, Hong Zhao, and Wenyi Chen "Frequency-shifting shadow moire technique", Proc. SPIE 3479, Laser Interferometry IX: Applications, (6 July 1998); https://doi.org/10.1117/12.316442

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