Spatial phase-shift reconstruction technique for measurement of complex mode vibration by dual-reference-stepped strobe phase holographic interferometry

Fang Chen; Gordon M. Brown; Christopher T. Griffen

doi:10.1117/12.216851

18 August 1995 Spatial phase-shift reconstruction technique for measurement of complex mode vibration by dual-reference-stepped strobe phase holographic interferometry

Fang Chen, Gordon M. Brown, Christopher T. Griffen

Author Affiliations +

Proceedings Volume 2622, Optical Engineering Midwest '95; (1995) https://doi.org/10.1117/12.216851
Event: Optical Engineering Midwest '95, 1995, Chicago, IL, United States

Abstract

This paper presents a method for measuring the complex mode of a vibrating structure using two separate dual reference stepped strobe phase (0, 90 degrees) holograms and a new spatial phase shifting technique during reconstruction. Spatial phase shifting is accomplished by scanning a pencil of a laser conjugate reconstruction beam in four equal steps across the hologram; four shifted phase real images are obtained for each of the two holograms and each set of four images is processed to get the unwrapped phase distribution. The vibration amplitude and phase are then obtained using these two phase distributions. The new spatial phase shifting technique greatly simplifies data acquisition and optical readout since only a single reconstruction beam is used to reconstruct both wavefronts for each hologram. The theory and experimental results are presented.

Citation Download Citation

Fang Chen, Gordon M. Brown, and Christopher T. Griffen "Spatial phase-shift reconstruction technique for measurement of complex mode vibration by dual-reference-stepped strobe phase holographic interferometry", Proc. SPIE 2622, Optical Engineering Midwest '95, (18 August 1995); https://doi.org/10.1117/12.216851

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