Dark-field separation of optical modes in a thermal point source

Si Ying Foo; Ming Zhi Koh; Xi Jie Yeo; Jae Suk Hwang; Christian Kurtsiefer; Peng Kian Tan

doi:10.1117/12.2675829

17 October 2023 Dark-field separation of optical modes in a thermal point source

Si Ying Foo, Ming Zhi Koh, Xi Jie Yeo, Jae Suk Hwang, Christian Kurtsiefer, Peng Kian Tan

Proceedings Volume 12740, Emerging Imaging and Sensing Technologies for Security and Defence VIII; 127400A (2023) https://doi.org/10.1117/12.2675829
Event: SPIE Security + Defence, 2023, Amsterdam, Netherlands

Abstract

Dark-field techniques are successfully used in microscopy for increasing the contrast of almost transparent objects, and for edge detection by removing image components with low spatial frequencies. A removal of image components with little interesting information but high intensity yields a higher signal-to-noise ratio for the image components of interest. Here, we present a technique to enhance the signal-to-noise ratio of an image signature contained in a spatial asymmetry. While being an interferometric technique based on image inversion, it will work with incoherent light sources, and thus be applicable in many practical imaging scenarios. We experimentally demonstrate an increase of the signal-to-noise ratio in asymmetry detection by an order of magnitude in a proof-of-principle experiment.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Si Ying Foo, Ming Zhi Koh, Xi Jie Yeo, Jae Suk Hwang, Christian Kurtsiefer, and Peng Kian Tan "Dark-field separation of optical modes in a thermal point source", Proc. SPIE 12740, Emerging Imaging and Sensing Technologies for Security and Defence VIII, 127400A (17 October 2023); https://doi.org/10.1117/12.2675829

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