Analysis of speckle-pattern interference fringes for transverse or longitudinal displacement

Furong Huo M.D.; Jun Guo; Wensheng Wang

doi:10.1117/12.900703

18 August 2011 Analysis of speckle-pattern interference fringes for transverse or longitudinal displacement

Furong Huo M.D., Jun Guo, Wensheng Wang

Proceedings Volume 8194, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications; 81942I (2011) https://doi.org/10.1117/12.900703
Event: International Symposium on Photoelectronic Detection and Imaging 2011, 2011, Beijing, China

Abstract

What we believe to be a method for recording speckle interference fringe with electrically addressed liquid crystal display (EALCD) and CCD is presented. The speckle patterns are obtained by image plane speckle method. Two patterns of speckle interference field before and after displacement are recorded by CCD camera and stored in computer. After subtracting and taking the absolute value, the correlative fringe pattern including object's displacement information is acquired. In this paper, methods that subtract optical noise are analyzed to enhance the signal-to-noise ratio of secondary speckle fringes using double-exposure measurements on rough surfaces. The speckle pattern is processed in spatial domain and frequency domain and the obvious results are given. Compared with the results, synthesized filter is proposed in the paper. The contrast of interference pattern is increased and high SNR of the speckle fringe pattern is realized. Experimental pictures are provided in the article. The experimental result shows that the application of the method, synthesized filtering of spatial domain with frequency domain, can be used to improve the fringe contrast. The results of the experimental studies proved that the synthesized filtering is the most effective way.

Citation Download Citation

Furong Huo M.D., Jun Guo, and Wensheng Wang "Analysis of speckle-pattern interference fringes for transverse or longitudinal displacement", Proc. SPIE 8194, International Symposium on Photoelectronic Detection and Imaging 2011: Advances in Imaging Detectors and Applications, 81942I (18 August 2011); https://doi.org/10.1117/12.900703

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
6 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Speckle

Digital filtering

Linear filtering

Electronic filtering

Image filtering

Speckle pattern

Image processing

Show All Keywords

Keywords/Phrases

Search In:

Publication Years