Phase-shifting digital holography using two low-coherence light sources with different wavelength

Yoshio Hayasaki; Shingo Tamano; Masaki Yamamoto; Nobuo Nishida

doi:10.1117/12.668627

20 January 2006 Phase-shifting digital holography using two low-coherence light sources with different wavelength

Yoshio Hayasaki, Shingo Tamano, Masaki Yamamoto, Nobuo Nishida

Proceedings Volume 6027, ICO20: Optical Information Processing; 60274V (2006) https://doi.org/10.1117/12.668627
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

Abstract

To observe an object shape in a light scattering medium, the low-coherence interferometry exercises its power to omit undesired light derived from multiple-light scattering. The phase-shifting digital holography is used to obtain the complex amplitude of the object from a few interference patterns. When the object has a height difference more than the wavelength of a light source, the obtained phase distribution has 2π ambiguity. Therefore, a phase-unwrapping technique is required to contour the object surface. When an object is in light-scattering media, the interference signal has much noise originating from multiple-light scattering, and therefore the phase unwrapping becomes harder. Two-wavelength interferometry set free from the unwrapping procedure. We propose a new method based on a combination of the phase-shifting digital holography, the two-wavelength interferometry, and the low-coherence interferometry. We demonstrate a topographic imaging of an object in light scattering media.

Citation Download Citation

Yoshio Hayasaki, Shingo Tamano, Masaki Yamamoto, and Nobuo Nishida "Phase-shifting digital holography using two low-coherence light sources with different wavelength", Proc. SPIE 6027, ICO20: Optical Information Processing, 60274V (20 January 2006); https://doi.org/10.1117/12.668627

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