Development of novel integration method of digital speckle tomography for analysis of unsteady and asymmetric flows

Han Seo Ko; Yong-Jae Kim; Seung Hwan Baek

doi:10.1117/12.695361

15 September 2006 Development of novel integration method of digital speckle tomography for analysis of unsteady and asymmetric flows

Han Seo Ko, Yong-Jae Kim, Seung Hwan Baek

Author Affiliations +

Proceedings Volume 6341, Speckle06: Speckles, From Grains to Flowers; 63411A (2006) https://doi.org/10.1117/12.695361
Event: Speckle06: Speckles, From Grains to Flowers, 2006, Nimes, France

Abstract

Transient and asymmetric density distributions have been investigated by a digital speckle tomography with a novel integration method. Multiple CCD images captured movements of speckles in three angles of view simultaneously because the flows were asymmetric and unsteady. The speckle movements which have been formed by a ground glass between no flow and downward butane flow from an elliptical nozzle have been calculated by a cross-correlation tracking method so that those distances can be transferred to deflection angles of laser rays for density gradients. A novel integration method has been developed to obtain projection data from the deflection angles for the speckle tomography. The unsteady density fields have been reconstructed from the accurate projection values by a real-time multiplicative algebraic reconstruction technique (MART) with the developed integration method.

Citation Download Citation

Han Seo Ko, Yong-Jae Kim, and Seung Hwan Baek "Development of novel integration method of digital speckle tomography for analysis of unsteady and asymmetric flows", Proc. SPIE 6341, Speckle06: Speckles, From Grains to Flowers, 63411A (15 September 2006); https://doi.org/10.1117/12.695361

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