Laser-diode joint-transform correlator with a digital interferometric technique

Yukihiro Ishii; Takeshi Takahashi

doi:10.1117/12.427060

8 May 2001 Laser-diode joint-transform correlator with a digital interferometric technique

Yukihiro Ishii, Takeshi Takahashi

Proceedings Volume 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001); (2001) https://doi.org/10.1117/12.427060
Event: Optical Engineering for Sensing and Nanotechnology (ICOSN '01), 2001, Yokohama, Japan

Abstract

A new method for joint-transform correlator (JTC) is presented in which complex amplitudes of joint power spectrum (JPS) of two inputs are measured by the six-step phase-shifting interferometry with a wavelength-shifted laser diode (LD). A phase calculation is immune to the changes in LD power. A joint-transform phase correlator JTPC) is demonstrated with a single centered correlation by the numerical Fourier transformation of a measured phase in an on-axis JPS. Multiple-object recognition by a JTPC is performed to eliminate the correlation between input targets. The experimental results with a JTPC are shown, exhibiting sharp correlation peak.

Citation Download Citation

Yukihiro Ishii and Takeshi Takahashi "Laser-diode joint-transform correlator with a digital interferometric technique", Proc. SPIE 4416, Optical Engineering for Sensing and Nanotechnology (ICOSN 2001), (8 May 2001); https://doi.org/10.1117/12.427060

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