Sensitivity increase in digital holographic interferometry

Nazif Demoli; Kristina Šariri; Ivica Sović; Marc Torzynski; Hanan Halaq; Dalibor Vukičević

doi:10.1117/12.781532

25 April 2008 Sensitivity increase in digital holographic interferometry

Nazif Demoli, Kristina Šariri, Ivica Sović, Marc Torzynski, Hanan Halaq, Dalibor Vukičević

Proceedings Volume 6995, Optical Micro- and Nanometrology in Microsystems Technology II; 699502 (2008) https://doi.org/10.1117/12.781532
Event: SPIE Photonics Europe, 2008, Strasbourg, France

Abstract

When using the interferometric techniques, the optical path changes induce the wavefront deformations that in turn cause the appearance of fringes. One general characteristic of such an approach is the measurement sensitivity. The actual sensitivity of a holographic interferometer is a function of, on one hand, the parameters of the measuring system (such as the wavelength of the light used) and, on the other hand, the environmental conditions in which the measurements are being made. The later depend predominately on statistical fluctuations inherent to the particular laboratory conditions. In many applications the sensitivity is near the limits of the deformation detectability. In such cases, it is of vital interest to increase the number of interferometric fringes thus improving the quality of the acquired data. In this paper, we give an overview of the sensitivity increase through various experimental and numerical approaches. We also present a new numerical iterative method in which every cycle doubles the number of interferometric fringes. The method has shown to be especially useful in applications with sub-wavelength wavefront deformations.

Citation Download Citation

Nazif Demoli, Kristina Šariri, Ivica Sović, Marc Torzynski, Hanan Halaq, and Dalibor Vukičević "Sensitivity increase in digital holographic interferometry", Proc. SPIE 6995, Optical Micro- and Nanometrology in Microsystems Technology II, 699502 (25 April 2008); https://doi.org/10.1117/12.781532

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