Optical pattern recognition by using speckle-multiplexed holograms

Byungchoon Yang; Hong-Seok Lee; Byoungho Lee

doi:10.1117/12.363931

20 September 1999 Optical pattern recognition by using speckle-multiplexed holograms

Byungchoon Yang, Hong-Seok Lee, Byoungho Lee

Proceedings Volume 3801, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications V; (1999) https://doi.org/10.1117/12.363931
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

Many researchers are now working on holographic memory. The holographic correlator is one of its different applications. The photorefractive hologram memory setup can be modified to be used as the correlator scheme. We can identify the object image by observing the direction of retrieved reference beams or correlation peaks. We have used a new scheme of using the speckle patterns as the reference beam. The speckle patterns can be made by multimode fibers or ground glasses. The hologram recorded with this speckled reference beam is less correlated with each other compared to the holograms with the unstructured reference beam. We have already proven that the hologram density could be increased with this speckled reference beam. We apply this technique to an optical correlator. The experimental result and the theoretical analysis are discussed.

Citation Download Citation

Byungchoon Yang, Hong-Seok Lee, and Byoungho Lee "Optical pattern recognition by using speckle-multiplexed holograms", Proc. SPIE 3801, Photorefractive Fiber and Crystal Devices: Materials, Optical Properties, and Applications V, (20 September 1999); https://doi.org/10.1117/12.363931

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