Unconventional imaging with radial Walsh filters

Walter D. Furlan; Federico Machado; Vicente Ferrando; Juan A. Monsoriu

doi:10.1117/12.2306984

24 May 2018 Unconventional imaging with radial Walsh filters

Walter D. Furlan, Federico Machado, Vicente Ferrando, Juan A. Monsoriu

Proceedings Volume 10677, Unconventional Optical Imaging; 106772N (2018) https://doi.org/10.1117/12.2306984
Event: SPIE Photonics Europe, 2018, Strasbourg, France

Abstract

In this work, we report the achievement of images obtained with radial Walsh filters. Derived from Walsh functions, radial Walsh filters are phase binary diffractive optical elements characterized by a set of equal-area concentric rings that take the phase values 0 or π, corresponding to +1 or -1 transmittance values of the corresponding Walsh function. Then, a radial Walsh filter can be re-interpreted as an aperiodic zone plate with self-similar multi-focusing properties under monochromatic illumination and, therefore, multi-imaging capabilities. We have implemented these unconventional lenses with a spatial light modulator and the first images obtained with this type of lenses are presented and evaluated.

Citation Download Citation

Walter D. Furlan, Federico Machado, Vicente Ferrando, and Juan A. Monsoriu "Unconventional imaging with radial Walsh filters", Proc. SPIE 10677, Unconventional Optical Imaging, 106772N (24 May 2018); https://doi.org/10.1117/12.2306984

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